A single-mode GaAlAs diode laser with over 90% output-coupling power and a large frequency-scanning range is reported. Based on grating feedback in the Littrow configuration, it is demonstrated that, with weak feedback (1.5 × 10-3 in this experiment), over a 7.5-GHz continuous tuning range can be achieved around tuning gaps of free-running operation. A frequency self-locking effect is also demonstrated in this system.
© 1996 Optical Society of America
Shaozheng Jin, Yongqing Li, and Min Xiao, "Single-mode diode laser with a large frequency-scanning range based on weak grating feedback," Appl. Opt. 35, 1436-1441 (1996)