Title :
An experimental study on stable single-frequency semiconductor lasers with external cavity
Author :
Rongqing, Hui ; Shangping, Tao ; Yizun, Wu ; Huaide, Peng
Author_Institution :
Beijing Univ. of Posts & Telecommun., China
Abstract :
Results are presented of a study on an external-cavity semiconductor laser consisting of a 1.3 mu m buried-heterostructure laser diode with an antireflection coated facet and a 4 mm GRINROD. Due to its enclosed compact structure and strong optical feedback, it provides a stable single mode, with a mainside mode ratio of more than 30 dB, and is not sensitive to environmental perturbations. No mode jumping occurred during 12 h of continuous observation. The measured linewidth of 90 kHz is in good agreement with the newly developed theoretical calculation.<>
Keywords :
laser cavity resonators; laser frequency stability; laser modes; semiconductor junction lasers; spectral line breadth; 1.3 micron; 4 mm; GRINROD; antireflection coated facet; buried-heterostructure laser diode; compact structure; environmental perturbations; external-cavity semiconductor laser; gradient refractive index ROD; linewidth; mode jumping; mode ratio; stable single mode; stable single-frequency semiconductor lasers; strong optical feedback; Diode lasers; Fiber lasers; Laser feedback; Laser modes; Laser stability; Laser theory; Optical feedback; Reflectivity; Semiconductor diodes; Semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
