High-power, external-cavity semiconductor lasers with narrow bandwidth and fiber-coupled output are designed and constructed. An output power of 540 mW is coupled out of a 100-μm multimode fiber with coupling efficiency of 72% when the laser is operated at 1.1 A. The emission linewidth is as narrow as 22 GHz, and the wavelength is tunable from 779.7 to 793.0 nm. Application of such lasers to remote real-time Raman sensing of materials is also demonstrated.
© 1998 Optical Society of America
Ming-Wei Pan, George R. Gray, Lee M. Smith, Robert E. Benner, Carl W. Johnson, and Daniel D. Knowlton, "Fiber-Coupled High-Power External-Cavity Semiconductor Lasers for Real-Time Raman Sensing," Appl. Opt. 37, 5755-5759 (1998)