Comparison of ion exchange and cw CO2 laser treatment of Nd-doped phosphate laser glass

Gong Hui; Li Chengfu

doi:10.1117/12.240415

27 May 1996 Comparison of ion exchange and cw CO₂ laser treatment of Nd-doped phosphate laser glass

Gong Hui, Li Chengfu

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Proceedings Volume 2714, 27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995; (1996) https://doi.org/10.1117/12.240415
Event: Laser-Induced Damage in Optical Materials: 1995, 1995, Boulder, CO, United States

Abstract

In recent years, the effect of laser pre-irradiation and ion exchange on glasses surface were widely carried out to stabilize their damage thresholds. But comparison of ion exchange and CW CO₂ laser treatment is never studied, this paper is devoted to the investigation of this question. Nd-doped phosphate laser glasses were heated with CW CO₂ laser radiation and were strengthened by ion exchange. Laser damage thresholds of the surface were measured with 1064 nm 10 ns pulses focused to small spots irradiation. Both ion exchange treatment and CW CO₂ laser treatment result in residual compress stress occurred at surface, peak-to- volley and microcracks decreased in surface appearance, and damage thresholds of surfaces increased by a factor of over 2. Polariscope, reflected optical microscope and atomic force microscope are used for stress, damage morphologies and surface topography analysis on glass surface. It is shown that laser condition mechanism is consistent with ion exchange treatment mechanism.

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Gong Hui and Li Chengfu "Comparison of ion exchange and cw CO₂ laser treatment of Nd-doped phosphate laser glass", Proc. SPIE 2714, 27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995, (27 May 1996); https://doi.org/10.1117/12.240415

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KEYWORDS

Ion exchange

Glasses

Laser damage threshold

Laser glasses

Carbon dioxide lasers

Continuous wave operation

Surface finishing

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