Title :
External-cavity semiconductor laser with Bragg grating in multimode fiber
Author :
Yu, Hong-Gang ; Xu, Chang-Qing ; Wang, Yong ; Wojcik, Jacek ; Peng, Zhi-Lin ; Mascher, Peter
Author_Institution :
Dept. of Eng. Phys., McMaster Univ., Hamilton, Ont., Canada
Abstract :
An external-cavity semiconductor laser with a 50-dB sidemode suppression ratio and a 0.05-nm spectral bandwidth is realized by using a Bragg grating in a multimode fiber (MMF). With the MMF, a coupling efficiency of 90% and a slope efficiency of 0.12 mW/mA are obtained, compared to a coupling efficiency of 50% and a slope efficiency of 0.05 mW/mA with a standard single-mode (SM) fiber. The alignment tolerance for the MMF is also improved in contrast to the SM fiber. The lasing wavelength can be stably locked at one of the Bragg wavelengths of the fiber grating in large ranges of injection current and temperature under the static and dynamic states.
Keywords :
Bragg gratings; laser cavity resonators; laser mode locking; laser stability; optical communication equipment; optical fibre couplers; optical fibre subscriber loops; semiconductor lasers; 90 percent; Bragg grating; Bragg wavelengths; alignment tolerance; coupling efficiency; external-cavity semiconductor laser; injection current; lasing wavelength stable locking; multimode fiber; sidemode suppression ratio; slope efficiency; spectral bandwidth; Bandwidth; Bragg gratings; Distributed feedback devices; Fiber gratings; Fiber lasers; Optical fibers; Power generation; Semiconductor lasers; Surface emitting lasers; Vertical cavity surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.834543
