Title :
Design of flat-top comb filter based on photonic crystal fiber Sagnac loop
Author :
Wang, Xude ; Li, Suwen
Author_Institution :
Sch. of Phys. & Electron. Inf., Huaibei Normal Univ., Huaibei, China
Abstract :
A novel all-fiber flat-top comb filter is proposed based on Sagnac loop interferometer of photonic crystal fiber (PCF). The transmission function of the proposed Sagnac loop filter is expressed theoretically by Jones transmit-matrix. The influences of birefringence of PCF, the lengths of two sections of PCFs and the rotatable angle of polarization controllers on its output spectra are numerically studied. On the basis of theoretical analysis, a wavelength switchable comb filter with flat-top spectral response is realized. This kind of filter can be expected to be used widely in DWDM systems in the future.
Keywords :
Sagnac interferometers; birefringence; comb filters; holey fibres; optical design techniques; optical fibre filters; optical fibre polarisation; photonic crystals; Jones transmit-matrix; Sagnac loop filter; Sagnac loop interferometer; all-fiber flat-top comb filter; birefringence; flat-top spectral response; photonic crystal fiber; polarization controllers; rotatable angle; transmission function; wavelength switchable comb filter; Abstracts; Optical fiber communication; Optical fiber polarization; Optical filters; Optical polarization; Jones matrix; birefringence; comb filter; fiber loop mirror; fiber optics communication; interference; photonic crystal fiber;
Conference_Titel :
Communications and Photonics Conference and Exhibition, 2011. ACP. Asia
Conference_Location :
Shanghai
Print_ISBN :
978-0-8194-8961-6
