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Journal articles on the topic 'Glass lasers'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Nunzi Conti, Gualtiero, S. Soria, Simone Berneschi, M. Brenci, F. Cosi, Stefano Pelli, Cristina Armellini, et al. "Glass Microspherical Lasers." Advances in Science and Technology 55 (September 2008): 46–55. http://dx.doi.org/10.4028/www.scientific.net/ast.55.46.

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We report experimental results obtained in our laboratories in the development of Er3+- doped glass microspherical cavities for the fabrication of compact and low threshold laser sources at 1.55 μm. We investigate three different approaches in order to fabricate the microspheres including direct melting of Er3+-doped glass powders, coating of silica microspheres with an Er3+- doped sol-gel layer, and synthesis of Er3+-doped monolithic microspheres using the sol-gel route in acid catalysis. Details of the different fabrication processes are presented together with the photoluminescence characterization in free space configuration of the microspheres and of the glass precursor. We analyse the photoluminescence spectra of the whispering gallery modes of the microspheres exited using evanescent coupling and we demonstrate laser action in a wide range of wavelengths around 1.55 μm.

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2

Anashkina, Elena A. "Laser Sources Based on Rare-Earth Ion Doped Tellurite Glass Fibers and Microspheres." Fibers 8, no. 5 (May 11, 2020): 30. http://dx.doi.org/10.3390/fib8050030.

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In recent years, huge progress has been made in the development of rare-earth ion doped tellurite glass laser sources, ranging from watt- and multiwatt-level fiber lasers to nanowatt level microsphere lasers. Significant success has been achieved in extending the spectral range of tellurite fiber lasers generating at wavelengths beyond 2 μm as well as in theoretical understanding. This review is aimed at discussing the state of the art of neodymium-, erbium-, thulium-, and holmium-doped tellurite glass fiber and microsphere lasers.

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3

Shinomoto, Rin, Yusuke Ito, Toru Kizaki, Kentaro Tatsukoshi, Yasuji Fukasawa, Keisuke Nagato, Naohiko Sugita, and Mamoru Mitsuishi. "Experimental Analysis of Glass Drilling with Ultrashort Pulse Lasers." International Journal of Automation Technology 10, no. 6 (November 4, 2016): 863–73. http://dx.doi.org/10.20965/ijat.2016.p0863.

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Ultrashort pulse laser processing that facilitates high-speed and fine processing of glass materials has received considerable attention in recent years, despite mechanical processing or etching having been the mainstream methods. However, the physical mechanisms of this technique and the influence of various parameters, such as the processing conditions and physical properties of the processed material, on generated shapes are not yet fully understood. In this work, we comprehensively investigated the influence of various parameters of ultrashort pulse lasers on the processing mechanisms through experiments conducted by changing the wavelength, pulse width, repetition rate, and pulse energy over a wide range. The physical effects of the laser parameters on the reflection of light and heat generation were discussed by analyzing the experimental results, and the influence of the parameters on the generated shapes, processing speed, and saturated depth was clarified. In addition, cracks around the ablated area, which are one of the problems concerning glass processing with ultrashort pulse lasers, were observed, and the influence of the pulse energy on the cracks was evaluated. It is expected that this research will allow for a thorough understanding of the laser parameters that are suitable for glass processing and widen the range of laser processing applications.

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4

Serbin, Jürgen, and George Oulundsen. "Lasers Improve Display Glass Cutting." Information Display 33, no. 5 (September 2017): 38–41. http://dx.doi.org/10.1002/j.2637-496x.2017.tb01029.x.

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5

Fang, Zaijin, Síle Nic Chormaic, Shanyu Wang, Xin Wang, Jibo Yu, Yuxuan Jiang, Jianrong Qiu, and Pengfei Wang. "Bismuth-doped glass microsphere lasers." Photonics Research 5, no. 6 (November 22, 2017): 740. http://dx.doi.org/10.1364/prj.5.000740.

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6

Mortier, M. "Ceramic and glass-ceramic lasers." Annales de Chimie Science des Matériaux 28, no. 6 (December 2003): 21–33. http://dx.doi.org/10.1016/j.anncsm.2003.09.003.

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7

Key, M. H., H. Baldis, D. Brown, M. Grande, C. Hooker, Y. Kato, C. Lewis, et al. "High power laser development and experimental applications to X-ray lasers, and short pulse energy transport." Laser and Particle Beams 8, no. 1-2 (January 1990): 19–25. http://dx.doi.org/10.1017/s0263034600007795.

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University research in the UK with high power lasers is carried out at the SERC's Central Laser Facility with a multi-terawatt neodymium glass laser, VULCAN, and a developmental KrF laser, SPRITE. These systems are briefly described together with the design of a new KrF laser to supersede VULCAN. The new laser design, SUPERSPRITE, is based on optical and Raman multiplexing which is being developed with the present SPRITE system. The specification of SUPERSPRITE is for 3.5 kJ in 1 ns and a peak power of 300 TW in short pulses. The new technology is seen as highly cost effective in relation to neodymium glass lasers. A resume of the development of XUV lasers in the UK in collaboration with laboratories overseas is given. The work is based on laser action through recombination in highly ionized ions and recent progress includes collaborative experiments on the GEKKO XII facility in Japan which have demonstrated laser action at the shortest wavelength to date at 45 A in Mg XII. The physics of energy transport in short pulses is fundamental to the extrapolation of recombination lasers to shorter wavelengths and is being studied from a more basic standpoint using both the VULCAN and SPRITE facilities. Some details of this work are given.

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8

Journal, Baghdad Science. "Theoretical study to find the thermal stress and strain generated in the Wood silica using lasers." Baghdad Science Journal 2, no. 1 (March 6, 2005): 73–80. http://dx.doi.org/10.21123/bsj.2.1.73-80.

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In this research study theory to find the stress and emotion gases in the glass as a result of exposure to pulses of the laser beam has been the study using vehicles three major on-system axes cylindrical (r, 0, z), where I took three models of glass silica glass soda glass fused and shedtwo types of lasers where the study showed that the thermal stresses and emotions ...

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9

LEE, C. C., T. R. SCHIBLI, G. ACOSTA, and J. S. BUNCH. "ULTRA-SHORT OPTICAL PULSE GENERATION WITH SINGLE-LAYER GRAPHENE." Journal of Nonlinear Optical Physics & Materials 19, no. 04 (December 2010): 767–71. http://dx.doi.org/10.1142/s021886351000573x.

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Pulses as short as 260 fs have been generated in a diode-pumped low-gain Er:Yb: glass laser by exploiting the nonlinear optical response of single-layer graphene. The application of this novel material to solid-state bulk lasers opens up a way to compact and robust lasers with ultrahigh repetition rates.

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10

Campbell, John H., Joseph S. Hayden, and Alex Marker. "High-Power Solid-State Lasers: a Laser Glass Perspective." International Journal of Applied Glass Science 2, no. 1 (February 22, 2011): 3–29. http://dx.doi.org/10.1111/j.2041-1294.2011.00044.x.

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11

Diciuc, Vlad, Ciprian Melian, and Mircea Lobonţiu. "Aspects Regarding the Surface Quality of the Laser Engraved Glass." Applied Mechanics and Materials 657 (October 2014): 276–80. http://dx.doi.org/10.4028/www.scientific.net/amm.657.276.

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The use of laser engraving equipment for marking on certain products the expiry date, the bar code as well as customizing them, represents an efficient and non-polluting method. This method is very challenging from the technological point of view and with a lot of process variables that demand research. The current paper tackles the quality of the laser engraved glass in CO2 environment, as a function of the following parameters: the lasers power and the lasers pulse length. Based on the experimental results a quality system is being proposed which relies on the visual examination of the craters, of the top area of the crater and the quantity of excess material surrounding them. The research method used in the current paper is the experiment and the comparative analysis of the experimental results.

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12

Sujecki, Slawomir, Lukasz Sojka, Angela Seddon, Trevor Benson, Emma Barney, Mario Falconi, Francesco Prudenzano, et al. "Comparative Modeling of Infrared Fiber Lasers." Photonics 5, no. 4 (November 12, 2018): 48. http://dx.doi.org/10.3390/photonics5040048.

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The modeling and design of fiber lasers facilitate the process of their practical realization. Of particular interest during the last few years is the development of lanthanide ion-doped fiber lasers that operate at wavelengths exceeding 2000 nm. There are two main host glass materials considered for this purpose, namely fluoride and chalcogenide glasses. Therefore, this study concerned comparative modeling of fiber lasers operating within the infrared wavelength region beyond 2000 nm. In particular, the convergence properties of selected algorithms, implemented within various software environments, were studied with a specific focus on the central processing unit (CPU) time and calculation residual. Two representative fiber laser cavities were considered: One was based on a chalcogenide–selenide glass step-index fiber doped with trivalent dysprosium ions, whereas the other was a fluoride step-index fiber doped with trivalent erbium ions. The practical calculation accuracy was also assessed by comparing directly the results obtained from the different models.

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13

ASAHARA, Yoshiyuki. "Glass and Optical Materials for Lasers." Journal of the Ceramic Society of Japan 99, no. 1154 (1991): 903–11. http://dx.doi.org/10.2109/jcersj.99.903.

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14

JØRGENSEN, C. K. "LUMINESCENCE IN POTENTIAL FLUORIDE GLASS LASERS." Le Journal de Physique Colloques 48, no. C7 (December 1987): C7–447—C7–450. http://dx.doi.org/10.1051/jphyscol:19877106.

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15

Jiao, Junke, Xinbing Wang, and Wenlong Tang. "Sealing glass ampoules with CO_2 lasers." Applied Optics 47, no. 35 (December 3, 2008): 6524. http://dx.doi.org/10.1364/ao.47.006524.

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16

REISFELD, E. "Wave-guided sol-gel glass lasers." Le Journal de Physique IV 04, no. C4 (April 1994): C4–281—C4–284. http://dx.doi.org/10.1051/jp4:1994469.

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17

Kuchma, I. G., A. V. Levoshkin, A. G. Murzin, D. S. Prilezhaev, and V. A. Fromzel'. "Highest efficiencies of neodymium glass lasers." Soviet Journal of Quantum Electronics 19, no. 5 (May 31, 1989): 629–33. http://dx.doi.org/10.1070/qe1989v019n05abeh008014.

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18

Denker, B. I., I. Kertesz, A. V. Kirjanov, N. Kroo, A. A. Maljutin, V. V. Osiko, S. E. Sverchkov, and U. E. Sverchkov. "Repetitively pulsed Nd-glass slab lasers." IEEE Journal of Quantum Electronics 25, no. 9 (1989): 1979–80. http://dx.doi.org/10.1109/3.35220.

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19

Zarins, Elmars, Deins Alksnis, Julija Pervenecka, Patricija Paulsone, Kristine Lazdovica, Aivars Vembris, and Valdis Kokars. "Several Derivatives of 6-(Tert-Butyl)-4H-Pyran-4-Ylidene Malononitrile with Different Amorphous Phase Promoting Substituents for Light-Amplification Systems." Key Engineering Materials 800 (April 2019): 275–79. http://dx.doi.org/10.4028/www.scientific.net/kem.800.275.

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A series of glassy 6-(tert-butyl)-4H-pyran-4-ylidene malononitrile (DCM) derivatives with covalently attached amorphous state promoting bulky 1,1,1-triphenylmethyl (trityl) moieties through several chemical design approaches have been synthesized and investigated for suitability in organic solid state laser applications. Results showed that the bonding type of such functional groups had a considerable influence on glass structure forming dye thermal properties and a slight influence on their optical properties. Thermal stability up to 346 °C was achieved with glass transitions in the range from 39 to 138 °C. Incorporation of bulky triphenyl substituents via ester groups showed remarkable amplified spontaneous emission (ASE) threshold energy value reduction by 1.7 times in comparison to other bonding approaches with excitation threshold energy density up to 91 µJ/cm2. Synthesized dyes show potential as the light-amplification medium component in organic solid state lasers.

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20

Anashkina, Elena A., Vitaly V. Dorofeev, and Alexey V. Andrianov. "In-Band Pumped Thulium-Doped Tellurite Glass Microsphere Laser." Applied Sciences 11, no. 12 (June 11, 2021): 5440. http://dx.doi.org/10.3390/app11125440.

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Microresonator-based lasers in the two-micron range are interesting for extensive applications. Tm3+ ions provide high gain; therefore, they are promising for laser generation in the two-micron range in various matrices. We developed a simple theoretical model to describe Tm-doped glass microlasers generating in the 1.9–2 μm range with in-band pump at 1.55 μm. Using this model, we calculated threshold pump powers, laser generation wavelengths and slope efficiencies for different parameters of Tm-doped tellurite glass microspheres such as diameters, Q-factors, and thulium ion concentration. In addition, we produced a 320-μm tellurite glass microsphere doped with thulium ions with a concentration of 5·1019 cm−3. We attained lasing at 1.9 μm experimentally in the produced sample with a Q-factor of 106 pumped by a C-band narrow line laser.

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21

Fu, Xing, Hui Qi, Yu Wen Zhao, and Dong Xu. "Experimental Study on Formation of the Microstructure on Copper Film Using Ultraviolet Nanosecond Laser." Applied Mechanics and Materials 870 (September 2017): 395–400. http://dx.doi.org/10.4028/www.scientific.net/amm.870.395.

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In this paper, the ablated microstructures on copper film affected by ultraviolet nanosecond pulse laser are presented. The experimental system was consisted of two lasers, optics and controlling electronics. A 3000mW, 355nm Q-switched ultraviolet lasers was used to the micro-polishing experiments in the work. The repetition rate of the ultraviolet pulse laser is from single-shot to 100kHz, and the pulse width is less than 40ns. The sample used in experiment is copper film (200 nm) sputtered on glass. A series of experiments at different laser parameters and speed of work platform are done. The ablating experiments are also carried out on focusing and defocusing application in the laser direct writer. The results were analyzed.

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22

France, P. W. "A Review of Fluoride Glass Fibre Lasers." Materials Science Forum 67-68 (January 1991): 503–8. http://dx.doi.org/10.4028/www.scientific.net/msf.67-68.503.

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23

Richards, B., A. Jha, Y. Tsang, D. Binks, J. Lousteau, F. Fusari, A. Lagatsky, C. Brown, and W. Sibbett. "Tellurite glass lasers operating close to 2μm." Laser Physics Letters 7, no. 3 (March 2010): 177–93. http://dx.doi.org/10.1002/lapl.200910131.

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24

Shibata, Shuichi, and Tetsuji Yano. "Spherical Cavity Glass Lasers for Multiwavelength Emission." International Journal of Applied Ceramic Technology 8, no. 5 (September 2011): 1010–16. http://dx.doi.org/10.1111/j.1744-7402.2010.02585.x.

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25

Kondratenko, V. S., A. N. Kobysh, Lu Hung-Tu, A. S. Naumov, and I. E. Velikovskii. "Glass Cutting Technology Combining Two Different Lasers." Glass and Ceramics 77, no. 5-6 (September 2020): 212–14. http://dx.doi.org/10.1007/s10717-020-00273-w.

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26

Afanas’ev, P. N., V. V. Lobachev, and S. Yu Strakhov. "Optimization of pulsed-periodic neodymium glass lasers." Journal of Engineering Physics and Thermophysics 71, no. 6 (November 1998): 1049–55. http://dx.doi.org/10.1007/bf02681461.

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27

Lancaster, D. G., S. Gross, A. Fuerbach, H. Ebendorff Heidepriem, T. M. Monro, and M. J. Withford. "Versatile large-mode-area femtosecond laser-written Tm:ZBLAN glass chip lasers." Optics Express 20, no. 25 (November 27, 2012): 27503. http://dx.doi.org/10.1364/oe.20.027503.

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28

Zhu, Xiushan, and N. Peyghambarian. "High-Power ZBLAN Glass Fiber Lasers: Review and Prospect." Advances in OptoElectronics 2010 (March 29, 2010): 1–23. http://dx.doi.org/10.1155/2010/501956.

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ZBLAN (ZrF4-BaF2-LaF3-AlF3-NaF), considered as the most stable heavy metal fluoride glass and the excellent host for rare-earth ions, has been extensively used for efficient and compact ultraviolet, visible, and infrared fiber lasers due to its low intrinsic loss, wide transparency window, and small phonon energy. In this paper, the historical progress and the properties of fluoride glasses and the fabrication of ZBLAN fibers are briefly described. Advances of infrared, upconversion, and supercontinuum ZBLAN fiber lasers are addressed in detail. Finally, constraints on the power scaling of ZBLAN fiber lasers are analyzed and discussed. ZBLAN fiber lasers are showing promise of generating high-power emissions covering from ultraviolet to mid-infrared considering the recent advances in newly designed optical fibers, beam-shaped high-power pump diodes, beam combining techniques, and heat-dissipating technology.

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29

Tam, Tran Thi, Dang Quoc Trung, Le Huu Minh, Tran Anh Vu, Do Ngoc Chung, and Patrice Feron. "WHISPERING GALLERY MODE LASERS IN ERBIUM/YTTERBIUM CODOPED PHOSPHATE GLASSES." ASEAN Journal on Science and Technology for Development 24, no. 1&2 (November 15, 2017): 119–24. http://dx.doi.org/10.29037/ajstd.188.

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The study of whispering gallery mode laser in Er3+/Yb3+ co-doped phosphate glass microsphere has been reported. The coupling was carried out by fiber half taper technique. The microsphere lasers have been studied under pumping at 980 nm, to take full advantage of energy transfer effect from ion Ytterbium to ion Erbium. The observed lasing range extends from 1533 nm to 1612 nm.

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30

Jipa, Florin, Stefana Iosub, Bogdan Calin, Emanuel Axente, Felix Sima, and Koji Sugioka. "High Repetition Rate UV versus VIS Picosecond Laser Fabrication of 3D Microfluidic Channels Embedded in Photosensitive Glass." Nanomaterials 8, no. 8 (July 31, 2018): 583. http://dx.doi.org/10.3390/nano8080583.

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Glass is an alternative solution to polymer for the fabrication of three-dimensional (3D) microfluidic biochips. Femtosecond (fs) lasers are nowadays the most promising tools for transparent glass processing. Specifically, the multiphoton process induced by fs pulses enables fabrication of embedded 3D channels with high precision. The subtractive fabrication process creating 3D hollow structures in glass, known as fs laser-assisted etching (FLAE), is based on selective removal of the laser-modified regions by successive chemical etching in diluted hydrofluoric acid solutions. In this work we demonstrate the possibility to generate embedded hollow channels in photosensitive Foturan glass volume by high repetition rate picosecond (ps) laser-assisted etching (PLAE). In particular, the influence of the critical irradiation doses and etching rates are discussed in comparison of two different wavelengths of ultraviolet (355 nm) and visible (532 nm) ranges. Fast and controlled fabrication of a basic structure composed of an embedded micro-channel connected with two open reservoirs, commonly used in the biochip design, are achieved inside glass. Distinct advantages such as good aspect-ratio, reduced processing time for large areas, and lower fabrication cost are evidenced.

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31

Khalid, M., G. Y. Chen, J. Bei, H. Ebendorff-Heidepriem, and D. G. Lancaster. "Microchip and ultra-fast laser inscribed waveguide lasers in Yb3+germanate glass." Optical Materials Express 9, no. 8 (August 1, 2019): 3557. http://dx.doi.org/10.1364/ome.9.003557.

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32

Maksimova, G. V., S. E. Sverchkov, and Yu E. Sverchkov. "Lasing tests on new ytterbium–erbium laser glass pumped by neodymium lasers." Soviet Journal of Quantum Electronics 21, no. 12 (December 31, 1991): 1324–25. http://dx.doi.org/10.1070/qe1991v021n12abeh004532.

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33

Polyakov, B., G. Marcins, M. Chubarov, A. Kuzmin, V. Klykov, and I. Tale. "PATTERNED LASER CRYSTALLIZATION OF a-Si." Latvian Journal of Physics and Technical Sciences 46, no. 3 (January 1, 2009): 50–54. http://dx.doi.org/10.2478/v10047-009-0009-y.

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PATTERNED LASER CRYSTALLIZATION OF a-SiThin films of amorphous Si on glass were crystallized by pulsed nano- and picosecond lasers. Two methods for creating the desired patterns of crystallized regions were used. In the former, the pattern is produced by a focused laser beam, and in the latter it is made using a prefabricated mask. The electric conductivity of crystallized films increases by more than 4 orders of magnitude in comparison with untreated amorphous films.

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34

Volkova, Elena A., Daniil A. Naprasnikov, and Nikolay I. Leonyuk. "Thin Films and Glass–Ceramic Composites of Huntite Borates Family: A Brief Review." Crystals 10, no. 6 (June 6, 2020): 487. http://dx.doi.org/10.3390/cryst10060487.

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Rare-earth aluminum borates, RAl3(BO3)4 (where R = Y, Pr–Lu), are of great interest because of their attractive multifunctional properties, depending on their structure and composition. The combination of desirable physical and chemical characteristics makes them promising materials for lasers and nonlinear optics. Research focusing on RAl3(BO3)4 (RAB) compounds and their solids solutions has continued for more than five decades and has been reflected in numerous articles and several reviews. The last decade’s enhanced interest is being conducted towards epitaxial layers because of the availability of other possible applications, for instance, as scintillators, visible emitting phosphors or optical waveguides and waveguide lasers. On the other hand, the tendency of borate melts to form glasses makes them attractive for research of micro-crystallization processes in these systems and can be effortless towards finding relatively inexpensive optical glass–ceramic materials with similar composition as alternative components to laser systems. This article reviews the recent progress carried out hitherto on epitaxial layers and glass–ceramic composites of huntite-type rare-earth aluminum borates.

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35

Xu Hang, 徐航, 戴世勋 Dai Shixun, 张培晴 Zhang Peiqing, 李杏 Li Xing, 吴越豪 Wu Yuehao, 吴丽华 Wu Lihua, 刘自军 Liu Zijun, 王训四 Wang Xunsi, 徐铁峰 Xu Tiefeng, and 聂秋华 Nie Qiuhua. "Research Progress in Chalcogenide Glass Raman Fiber Lasers." Laser & Optoelectronics Progress 53, no. 3 (2016): 030004. http://dx.doi.org/10.3788/lop53.030004.

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36

HUANG GUO-SONG, ZHOU FENG, GU SHAO-TING, ZHANG GUO-XUAN, and CHEN ZE-XING. "THERMAL DISTORTION OF Nd: GLASS HOLLOW CYLINDER LASERS." Acta Physica Sinica 39, no. 3 (1990): 367. http://dx.doi.org/10.7498/aps.39.367.

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37

Buerhop, C., B. Blumenthal, R. Weissmann, N. Lutz, and S. Biermann. "Glass surface treatment with excimer and CO2 lasers." Applied Surface Science 46, no. 1-4 (December 1990): 430–34. http://dx.doi.org/10.1016/0169-4332(90)90184-2.

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38

Funk, D. S., and J. G. Eden. "Glass-fiber lasers in the ultraviolet and visible." IEEE Journal of Selected Topics in Quantum Electronics 1, no. 3 (1995): 784–91. http://dx.doi.org/10.1109/2944.473660.

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39

Galagan, B. I., I. N. Glushchenko, B. I. Denker, V. E. Kisel', S. V. Kuril'chik, N. V. Kuleshov, and S. E. Sverchkov. "New ytterbium-phosphate glass for diode-pumped lasers." Quantum Electronics 39, no. 10 (October 31, 2009): 891–94. http://dx.doi.org/10.1070/qe2009v039n10abeh014115.

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40

Schulzgen, A., Li Li, Xiushan Zhu, V. L. Temyanko, and N. Peyghambarian. "Microstructured Active Phosphate Glass Fibers for Fiber Lasers." Journal of Lightwave Technology 27, no. 11 (June 2009): 1734–40. http://dx.doi.org/10.1109/jlt.2009.2022476.

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41

Wu, MingCho, Yung Jui Chen, and John Fitz. "Monolithic integration of glass waveguides with semiconductor lasers." Journal of Applied Physics 73, no. 3 (February 1993): 1550–52. http://dx.doi.org/10.1063/1.353234.

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42

Manes, K. R., and W. W. Simmons. "Statistical optics applied to high-power glass lasers." Journal of the Optical Society of America A 2, no. 4 (April 1, 1985): 528. http://dx.doi.org/10.1364/josaa.2.000528.

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43

Denker, B. I., G. V. Maksimova, Vyacheslav V. Osiko, S. E. Sverchkov, and Yu E. Sverchkov. "New methods for passiveQswitching of erbium glass lasers." Soviet Journal of Quantum Electronics 20, no. 8 (August 31, 1990): 877–78. http://dx.doi.org/10.1070/qe1990v020n08abeh007132.

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44

Morkel, P. R., K. P. Jedrzejewski, and E. R. Taylor. "Q-switched neodymium-doped phosphate glass fiber lasers." IEEE Journal of Quantum Electronics 29, no. 7 (July 1993): 2178–88. http://dx.doi.org/10.1109/3.237492.

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45

Jiao, Junke, and Xinbing Wang. "Numerical investigation on machining glass with CO2 lasers." Frontiers of Optoelectronics in China 2, no. 3 (June 2, 2009): 334–38. http://dx.doi.org/10.1007/s12200-009-0014-z.

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46

Schröter, Anja, Mark Kalus, and Nils Hartmann. "Substrate-mediated effects in photothermal patterning of alkanethiol self-assembled monolayers with microfocused continuous-wave lasers." Beilstein Journal of Nanotechnology 3 (January 26, 2012): 65–74. http://dx.doi.org/10.3762/bjnano.3.8.

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In recent years, self-assembled monolayers (SAMs) have been demonstrated to provide promising new approaches to nonlinear laser processing. Most notably, because of their ultrathin nature, indirect excitation mechanisms can be exploited in order to fabricate subwavelength structures. In photothermal processing, for example, microfocused lasers are used to locally heat the substrate surface and initiate desorption or decomposition of the coating. Because of the strongly temperature-dependent desorption kinetics, the overall process is highly nonlinear in the applied laser power. For this reason, subwavelength patterning is feasible employing ordinary continuous-wave lasers. The lateral resolution, generally, depends on both the type of the organic monolayer and the nature of the substrate. In previous studies we reported on photothermal patterning of distinct types of SAMs on Si supports. In this contribution, a systematic study on the impact of the substrate is presented. Alkanethiol SAMs on Au-coated glass and silicon substrates were patterned by using a microfocused laser beam at a wavelength of 532 nm. Temperature calculations and thermokinetic simulations were carried out in order to clarify the processes that determine the performance of the patterning technique. Because of the strongly temperature-dependent thermal conductivity of Si, surface-temperature profiles on Au/Si substrates are very narrow ensuring a particularly high lateral resolution. At a 1/e spot diameter of 2 µm, fabrication of subwavelength structures with diameters of 300–400 nm is feasible. Rapid heat dissipation, though, requires high laser powers. In contrast, patterning of SAMs on Au/glass substrates is strongly affected by the largely distinct heat conduction within the Au film and in the glass support. This results in broad surface temperature profiles. Hence, minimum structure sizes are larger when compared with respective values on Au/Si substrates. The required laser powers, though, are more than one order of magnitude lower. Also, the laser power needed for patterning decreases with decreasing Au layer thickness. These results demonstrate the impact of the substrate on the overall patterning process and provide new perspectives in photothermal laser patterning of ultrathin organic coatings.

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Alamri, Sabri, Paul A. Sürmann, Andrés F. Lasagni, and Tim Kunze. "Interference-based laser-induced micro-plasma ablation of glass." Advanced Optical Technologies 9, no. 1-2 (February 25, 2020): 79–88. http://dx.doi.org/10.1515/aot-2019-0061.

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AbstractGlass is one of the most important technical surfaces for numerous applications in automotive, optical, and consumer industries. In addition, by producing textured surfaces with periodic features in the micrometre range, new functions can be created. Although laser-based methods have shown to be capable to produce structured materials in a wide amount of materials, due to its transparency large bandgap dielectrics can be only processed in a controlled manner by employing high-power ultra-short pulsed lasers, thus limiting the employable laser sources. In this article, an interference-based method for the texturing of soda-lime glass using a 15 ns pulsed (1 kHz repetition rate) infrared (1053 nm) laser is proposed, which allows fabricating different periodic patterns with micrometre resolution. This method consists on irradiating a metallic absorber (stainless steel) put in direct contact with the glass sample and inducing locally an etching process on the backside of the glass. Then, the produced plasma at the interference maxima positions leads to the local fabrication of well-defined periodic line-like and dot-like surface patterns. The produced patterns are characterised using white light interferometry and scanning electron microscopy.

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Jiang, Shibin. "Pulsed 2 Micron Wavelength Fiber Lasers for Packaging." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2014, DPC (January 1, 2014): 002105–31. http://dx.doi.org/10.4071/2014dpc-tha33.

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Fiber laser sources near 2um wavelength have attracted intense interest in recent years because of the combination of high laser efficiency, strong absorption of many visible transparent materials, outstanding reliability, as well as retina safety. In this presentation, we report our latest developments of various 2um fiber lasers at AdValue Photonics for packaging applications, especially Q-switched and mode-locked 2um fiber lasers using our proprietary infrared glass fiber technology. We demonstrated and commercialized the first all-fiber Q-switched single-frequency laser at a wavelength near 2um using our proprietary rare-earth doped gain fibers. The laser pulsewidth can be 20ns and 180ns, and the peak power can be more than 10kW. Most transparent plastic materials have a relatively strong absorption near 2 micron wavelength, so 2 micron Q-switched fiber laser is one of the ideal laser for transparent plastic welding, marking, cutting, and drilling. Silicon has a good optical transmission near 2 micron wavelength, which allows 2 micron Q-switched to process the material after pass through the silicon wafer as well as remove residual materials containing any organic components. In this presentation we will describe detailed experimental results and present material processing samples for packaging applications.

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Lv, Jing, Kedian Wang, and Guanghua Cheng. "Filament damage and channel waveguide fabrication in Yb-doped phosphate glass." Modern Physics Letters B 34, no. 29 (July 28, 2020): 2050325. http://dx.doi.org/10.1142/s021798492050325x.

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We report on the fabrication of filament damages in Yb-doped phosphate glass by femtosecond laser pulses. The uneven index modification was obtained using a 20× optical microscope objective with 0.4 numerical apertures. The multimode fields of original channel waveguides were investigated and in good agreement with the simulation results, whose structures can be regarded as a kind of beam splitters. Under the optical pump at 976 nm, the end region of the original filament shows continuous wave laser oscillation. The elongated and uniform filaments were fabricated by introducing a circular aperture, so that the guiding performance of tradition-channel single mode was achieved. Both large-mode-area waveguides are expected to find applications in optical communications and high-power lasers and amplifiers.

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Sadighi-Bonabi, R., H. Hora, Z. Riazi, E. Yazdani, and S. K. Sadighi. "Generation of plasma blocks accelerated by nonlinear forces from ultraviolet KrF laser pulses for fast ignition." Laser and Particle Beams 28, no. 1 (March 2010): 101–7. http://dx.doi.org/10.1017/s0263034609990656.

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AbstractHere we report on the production of highly directed ion blocks by plasma interaction of ultraviolet wavelength light produced from a KrF laser. This may support the requirement to produce a fast ignition deuterium-tritium fusion at densities not much higher than the solid state by a single shot petawatt-picoseconds ultraviolet laser pulse. Using double Rayleigh initial density profiles, we are studying numerically how the nonlinear force necessary to accelerate plasma blocks may reach the highest possible thickness. Propagation of plasma blocks and the volumetric hot electrons can be shown in detail. Results of computations for wavelengths of two lasers are compared, which show that the block current density for a KrF laser is approximately four times bigger than for the Nd-glass lasers. This is in good agreement with the number predicted by theory.

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