- Li, Ming
- Shao, Li-Yang
- Albert, Jacques
- Yao, Jianping
A tunable temporal photonic fractional differentiator implemented based on a tilted fiber Bragg grating is proposed and demonstrated. The phase response at a cladding mode resonant wavelength is strongly polarization-dependent and the fractional order of the photonic differentiator can be continuously tuned by changing the polarization state of the input light wave. A proof-ofconcept experiment is carried out. The fractional differentiation of an optical Gaussian pulse with a bandwidth of 40 GHz is demonstrated, in which the fractional order is continuously tuned from 0.81 to 1.42.
Index Terms—Polarization, tilted fiber Bragg grating (TFBG), tunable photonic fractional differentiator.