Polarization-Controlled Tunable All-Fiber Comb Filter Based on a Modified Dual-Pass Mach–Zehnder Interferometer

Author

Luo, Zhi-Chao ; Luo, Ai-Ping ; Xu, Wen-Cheng

Author_Institution

Lab. of Photonic Inf. Technol., South China Normal Univ., Guangzhou, China

Volume

21

Issue

15

fYear

2009

Firstpage

1066

Lastpage

1068

Abstract

We propose and demonstrate a novel tunable all-fiber comb filter based on a modified dual-pass Mach-Zehnder (M-Z) interferometer. The proposed filter consists of a polarization-dependent isolator, a polarization controller (PC), and a modified dual-pass M-Z interferometer composed of a standard 3-dB and a non-3-dB fiber coupler with a PC in one arm. By adjusting the polarization state of the input light, dual-function operation, the spectral spacing tunable and the wavelength switching (interleaving) operation can be easily achieved. The theoretical prediction is verified by the experimental results.

Keywords

Mach-Zehnder interferometers; comb filters; optical fibre couplers; optical fibre filters; optical fibre polarisation; optical tuning; M-Z interferometer; fiber coupler; interleaving operation; modified dual-pass Mach-Zehnder interferometer; polarization controller; polarization-controlled tunable all-fiber comb filter; polarization-dependent isolator; spectral spacing; wavelength switching; Comb filter; Mach–Zehnder (M-Z) interferometer; polarization-controlled;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2009.2022636

Filename

5071237