Abstract
We demonstrate thermo-optically tunable -doped fiber amplifiers covering S and bands using fundamental-mode cutoff filters discretely located in a long standard -doped fiber. The material dispersion and waveguide structure of the tapered fibers are locally modified to produce high-cutoff-efficiency filters that make the unwanted amplified spontaneous emission highly attenuated at the longer wavelengths, and the optical gain is thus moved toward the shorter wavelengths. The maximal signal gains are measured to be 18.92, 37.18, and with pump power of in the S, C, and L bands, respectively.
© 2006 Optical Society of America
Full Article | PDF ArticleMore Like This
Chi-Ming Hung, Nan-Kuang Chen, Yinchieh Lai, and Sien Chi
Opt. Express 15(4) 1454-1460 (2007)
Nan-Kuang Chen, Sien Chi, and Shiao-Min Tseng
Opt. Express 13(18) 7250-7255 (2005)
Matteo Foroni, Federica Poli, Annamaria Cucinotta, and Stefano Selleri
Opt. Lett. 31(22) 3228-3230 (2006)