Wavelength switchable multiwavelength actively mode-locked fiber-ring laser based on highly nonlinear photonic crystal fiber and multimode fiber Bragg grating

Xiaohui Fang; Ping-Kong Alex Wai; Chao Lu; Xinhuan Feng

doi:10.1117/1.3041768

1 December 2008 Wavelength switchable multiwavelength actively mode-locked fiber-ring laser based on highly nonlinear photonic crystal fiber and multimode fiber Bragg grating

Xiaohui Fang, Ping-Kong Alex Wai, Chao Lu, Xinhuan Feng

Author Affiliations +

Optical Engineering, Vol. 47, Issue 12, 124202 (December 2008). https://doi.org/10.1117/1.3041768

Abstract

A wavelength switchable multiwavelength actively mode-locked fiber-ring laser based on highly nonlinear photonic crystal fiber (PCF) and polarization-dependent mode coupling to multimode-fiber Bragg grating (MMFBG) is proposed. Twenty meters of highly nonlinear dispersion-shifted PCF (DS-PCF) is inserted into the fiber ring cavity to suppress gain competition through the four-wave-mixing (FWM) effect. A mode scrambler is attached to the multimode fiber (MMF) to introduce a polarization-dependent mode coupling to the MMFBG. Through changing polarization in the cavity, stable and switchable one-wavelength, two-wavelength (wavelength spacing of 0.8 and 2.4 nm), and three-wavelength simultaneously actively mode-locked optical pulse trains at a repetition rate of 5 GHz are obtained. We show that high nonlinearity introduced by the nonlinear PCF in the cavity can improve significantly supermode suppression ratio (SMSR) of the multiwavelength pulses generated and a sidemode suppression ratio (SMSR) of 58 dB is realized.

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Xiaohui Fang, Ping-Kong Alex Wai, Chao Lu, and Xinhuan Feng "Wavelength switchable multiwavelength actively mode-locked fiber-ring laser based on highly nonlinear photonic crystal fiber and multimode fiber Bragg grating," Optical Engineering 47(12), 124202 (1 December 2008). https://doi.org/10.1117/1.3041768

Published: 1 December 2008

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