An optimized dual fiber Bragg grating (FBG) is proposed for 980-nm semiconductor lasers without thermoelectric coolers to restrict temperature-induced wavelength shift. The mathematical model of the temperature-induced wavelength shift of the laser with the dual FBG is built using the external cavity feedback rate equations. The external cavity parameters are optimized for achieving the stability mode-locking laser output. The spectral characteristics of the dual FBG stabilized laser are measured to range from 0 to 70 oC. The side mode suppression ratio (SMSR) is more than 45 dB, while the full-width at half-maximum (FWHM) is less than 1 nm. The peak wavelength shift is less than 0.1 nm. The dual FBG wavelength shift proportional coefficient is between 0.1086 and 0.4342.
© 2011 Chinese Optics Letters
Yize Huang, Yi Li, Haifang Wang, Xiaojing Yu, Hu Zhang, Wei Zhang, Huiqun Zhu, Sheng Zhou, Ruoxi Sun, and Yuming Zhang, "Wavelength stabilization of a 980-nm semiconductor laser module stabilized with high-power uncooled dual FBG," Chin. Opt. Lett. 9, 031403- (2011)