All-fiber acousto-optic tunable notch filter with a fiber winding driven by a cuneal acoustic transducer.
We report a type of all-fiber acousto-optic tunable notch filter consisting of a cuneal acoustic transducer and a fiber winding of four unjacketed single-mode fibers. With -32 dB peak rejection efficiency and 178 nm tunable range of the central wavelength, all of the tunable characteristics of the all-fiber acousto-optic tunable filter are kept. In addition, the structure is versatile and convenient for use in building other complicated filters. As an example, a coarse comblike filter has been built by adjusting the axial strains of the unjacketed fibers.
MOE Key Laboratory of Weak Light Nonlinear Photonics, Nankai University, Tianjin 300457, China.
Wending
W
Zhang
Feng
F
Gao
Fang
F
Bo
Qiang
Q
Wu
Guoquan
G
Zhang
Jingjun
J
Xu