A theoretical and experimental study of a multiwavelength fiber-ring laser that incorporates a semiconductor optical amplifier (SOA) in the laser cavity as a phase modulator to suppress the homogeneous line broadening is presented. The analysis reveals that the phase shift introduced by the SOA-based phase modulator is more significant than that formed using a LiNbO3 phase modulator, which leads to a better suppression of the homogeneous line broadening. Multiwavelength lasing with small wavelength spacing and improved stability at room temperature is achieved. A fiber-ring laser based on the proposed approach is implemented. Stable multiwavelength operation with up to 26 wavelengths and wavelength spacing as small as 0.19 nm at room temperature is demonstrated.
© 2005 IEEE
Jian Yao, Jianping Yao, Zhichao Deng, and Jian Liu, "Investigation of Room-Temperature Multiwavelength Fiber-Ring Laser That Incorporates an SOA-Based Phase Modulator in the Laser Cavity," J. Lightwave Technol. 23, 2484- (2005)