Wideband tunable fiber short-pass filter based on side-polished fiber with dispersive polymer overlay.
It is known that dispersive fiber has an LP01 mode cutoff wavelength that acts as a wavelength filter. With a dispersive polysiloxane polymer overlay on a side-polished single-mode fiber, an in-line tunable fiber short-pass filter with a tuning range of approximately 400 nm (1250-1650 nm) and a temperature variation of 15 degrees C was demonstrated. The rejection efficiency was greater than 50 dB, whereas the insertion and polarization-dependent losses were below 0.26 and 0.09 dB, respectively.
Chen
Nan-Kuang
NK
Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan. nkchen.eo90g@nctu.edu.tw
Chi
Sien
S
Tseng
Shiao-Min
SM