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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2021, Vol. 40 ›› Issue (11): 3784-3790.

• Glass • Previous Articles     Next Articles

Femtosecond Laser Direct Written Waveguides in Ultra-Low Expansion Glass-Ceramics

LI Zihuang1, GAO Yunzhou2, FAN Shigang3, GU Shaoxuan1, TAO Haizheng1   

  1. 1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;
    2. Sichuan Shenguang Quartz Science and Technology Co., Ltd., Mianyang 621700, China;
    3. Beijing Sinoma Synthetic Crystals Co., Ltd., Beijing 100018, China
  • Received:2021-05-03 Revised:2021-06-02 Online:2021-11-15 Published:2021-12-08

Abstract: Basing on optimized laser parameters, optical waveguides with an insertion loss of 4.94 dB were fabricated in ultra-low expansion glass-ceramics by using femtosecond laser to directly write waveguide method. The structure and transmittance of the glass-ceramics before and after laser irradiation were characterized by Raman spectrometer, X-ray diffractometer and spectrophotometer. The cross-section morphology and element distribution of samples were characterized by SEM and EDS. Based on the 2% (mass fraction) HF dilute solution corrosion test, the chemical corrosion resistance of samples was characterized. The valence states of zirconium and titanium ions in samples were characterized by X-ray photoelectron spectroscopy. The results show that after laser irradiation the chemical corrosion resistance of glass-ceramics decreases, some small and obvious absorption bands appeares in glass-ceramics. Combined with X-ray photoelectron spectroscopy analysis, it is confirmed that these phenomena are caused by the reduction of Zr4+ or Ti4+ in glass-ceramics into meta-stable Zr3+ or Ti3+ with higher chemical activity.

Key words: ultra-low expansion glass-ceramics, femtosecond laser, optical waveguide, photo-reduction, refractive index, chemical corrosion resistance

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