Direct writing waveguides inside YAG crystal by femtosecond laser

✍ Scribed by Shizhen Xu; Jianrong Qiu; Chengbin Li; Haiyi Sun; Zhizhan Xu

• Book ID: 103874392
• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 331 KB
• Volume: 282
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2009.09.012

✦ Synopsis

A 120 fs Ti-sapphire laser was used to fabricate waveguides in YAG crystal. A 7 mm long waveguide was written at a position of 100 lm below the surface, which shows multimode propagation at 633 nm with optical attenuation of about 0.2 dB/mm. The light guiding occurs in the region around the visible laserdamaged region, indicating that the light guiding area is induced by stress. The waveguide exhibited strong birefringence property with maximum magnitude of about 1.5 Â 10 À5 . Infrared and Raman spectroscopy analysis indicate there is no change in chemical composition in laser-modified zone.