Z-scan study of third-order optical nonlinearities in bismuth-based glasses

✍ Scribed by Tomoharu Hasegawa; Tatsuo Nagashima; Naoki Sugimoto

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 127 KB
• Volume: 250
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2005.02.022

✦ Synopsis

The third-order optical nonlinearity was measured in bismuth-based glasses by Z-scan technique using femto-second laser pulses. Re(v (3) ) = 4.9 • 10 À11 esu at 748 nm was obtained in the glass containing 65.5 mol% of Bi 2 O 3 . Although, the wavelength dependence of Re(v ( 3) ) shows resonant effect significantly, relatively small nonlinear absorption coefficient b = 0.8 cm/GW at 769 nm was estimated. Bismuth-based glass exhibits the largest third-order optical nonlinearity in oxide glasses, indicating they are promising materials used for nonlinear optical devices.