Optical and thermal stability of Ge-as-Se chalcogenide glasses for femtosecond laser writing

Zhu, Liang; Yang, Dandan; Wang, Leilei; Zeng, Jianghui; Zhang, Qian; Xie, Min; Zhang, Peiqing; Dai, Shixun

doi:10.1016/j.optmat.2018.08.041

Cited by 45 publications

(14 citation statements)

References 26 publications

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“…Among ChGs, Ge–As–Se glasses are excellent infrared materials that have high glass transition temperatures and laser damage thresholds. The introduction of Ge enables the glasses to form a stable 3D network structure, thereby resulting in higher thermal stability and laser damage threshold than those in commonly used As–Se glasses . Thence, these glasses are an excellent candidate for photonic devices and have been successfully used for nonlinear super continuum generation, PC with ultrahigh Q‐factor values, and low‐loss optical waveguides .…”

Section: Introductionmentioning

confidence: 99%

Surface damage and threshold determination of Ge–As–Se glasses in femtosecond pulsed laser micromachining

Wang

Zhang

et al. 2019

J Am Ceram Soc

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Ge–As–Se chalcogenide glasses were prepared and the surface damage characteristics under femtosecond laser irradiation were experimentally investigated. Femtosecond laser beams with different power intensities, focusing depths, pulse repetition rates, and pulse numbers were employed to determine the damage thresholds of the samples. The surface morphologies and feature sizes of the damage craters were studied with regard to laser energy density to evaluate the damage circumstances of the glasses. The generation of the surface damage was also recorded by using different numbers of pulses. Results showed that the damage area increased monotonically with the laser power at low energy density and tended to saturation when reaching a critical value. According to the linear circumstances of laser energy density on the damage crater area, the average damage thresholds of the Ge–As–Se glasses with different repetition rates and pulse numbers were obtained. Results showed that the damage threshold decreased with the increase in pulse repetition rate and number of pulse.

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Section: Introductionmentioning

confidence: 99%

Surface damage and threshold determination of Ge–As–Se glasses in femtosecond pulsed laser micromachining

Wang

Zhang

et al. 2019

J Am Ceram Soc

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“…78,[103][104][105][106][107] Recently, Ge-As-Se glasses were found to have improved optical and thermal stability over As 2 Se 3 as a result of added Ge. 108,109 With increasing Ge content into the composition, the glass-transition temperature was shown to increase while the thermal expansion coefficient decreased. 108 Additionally, Ge-As-Se glasses were observed to have a higher laser damage threshold compared to that of As 2 S 3 glasses.…”

Section: Laser Processing and Structures Fabricated In Chalcogenide Glassesmentioning

confidence: 99%

“…108,109 With increasing Ge content into the composition, the glass-transition temperature was shown to increase while the thermal expansion coefficient decreased. 108 Additionally, Ge-As-Se glasses were observed to have a higher laser damage threshold compared to that of As 2 S 3 glasses. 110 This is encouraging for the future fs laser writing of devices in Ge-As-Se-based chalcogenide.…”

Section: Laser Processing and Structures Fabricated In Chalcogenide Glassesmentioning

confidence: 99%

“…By adding Ge and Se elements into the composition it increases the stability, lifetime, and increases photosensitivity of the film which can have important consequences for device fabrication . Recently, Ge–As–Se glasses were found to have improved optical and thermal stability over As 2 Se 3 as a result of added Ge . With increasing Ge content into the composition, the glass‐transition temperature was shown to increase while the thermal expansion coefficient decreased .…”

Section: Femtosecond Direct Laser Writing and Chemical Etching In Optmentioning

confidence: 99%

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Advances in femtosecond laser processing of optical material for device applications

Choi

Schwarz

2020

Int J of Appl Glass Sci

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Femtosecond laser induced changes and writing in optical materials have proven to be an excellent route to the production of high-quality micro-and nanofabrication of functional devices. In this paper we present the latest advancements in femtosecond laser processing of optical materials for device applications. We look at femtosecond direct laser writing for photonic device fabrication in fused silica and active glasses.We also discuss femtosecond laser writing and wet chemical etching in fused silica, Foturan, and chalcogenide glasses with applications in microfluidics, optics, sensors, and photonic devices.

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“…The larger temperature gradient and thermoelastic stress first appeared in the irradiated area, which made the window material generate thermal distortion. When the thermal stress gradually accumulated and exceeded the strength limit of the material, the irradiated area first burst, eventually causing macro damage to the window [26,27]. It can be seen from Table 4 that the damage thresholds of the NIR lasers out of band on the Ge and Si windows were close.…”

Section: Continuous Laser Damage Flat Window Experimentsmentioning

confidence: 99%

Experimental Study on the Damage of Optical Materials by out of Band Composite Laser

et al. 2020

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For the paper, experimental studies were performed on the damage of the Ge- and Si-based flat window by lasers out-of-band. The experimental results showed that lasers out-of-band can cause film damage and substrate damage to Ge and Si windows. The high-energy laser damage window mechanism mainly manifested as thermal effects. The composite laser damage thresholds for the substrate were an Si window of 21.6 J/cm2 and a Ge window of 3 J/cm2. Compared with continuous laser and long pulse laser experimental results, it was found that the use of long pulse-continuous composite constitution could effectively reduce the damage threshold. Compared to the long-pulse laser, the composite laser could achieve similar damage effects with a smaller energy density.

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Optical and thermal stability of Ge-as-Se chalcogenide glasses for femtosecond laser writing

Cited by 45 publications

References 26 publications

Surface damage and threshold determination of Ge–As–Se glasses in femtosecond pulsed laser micromachining

Surface damage and threshold determination of Ge–As–Se glasses in femtosecond pulsed laser micromachining

Advances in femtosecond laser processing of optical material for device applications

Experimental Study on the Damage of Optical Materials by out of Band Composite Laser

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