Title :
Absorption loss coefficient of the active layer for 1.48-μm bulk and MQW lasers
Author :
Kakimoto, Syouichi ; Watanabe, Hitoshi
Author_Institution :
Optoelectron. & Microwave Devices R&D Lab., Mitsubishi Electr. Corp., Hyogo, Japan
fDate :
1/1/1998 12:00:00 AM
Abstract :
It is shown that the absorption loss coefficient of the active layer for 1.48-μm bulk lasers is 66 cm-1 which is between 45 and 107 cm-1 for 1.3-μm bulk lasers and for 1.55-μm bulk lasers, respectively. It is also described that the absorption loss coefficient of the active layer for 1.48-μm multiple-quantum-well (MQW) lasers is 28 cm-1 which is about two-fifths of that for 1.48-μm bulk lasers. Therefore, the high slope efficiency of the 1.48-μm MQW lasers is attributed not only to the small optical confinement factor but also to the small absorption loss coefficient of the active layer
Keywords :
Fabry-Perot resonators; infrared sources; laser beams; laser variables measurement; optical fabrication; optical losses; quantum well lasers; vapour phase epitaxial growth; 1.3 mum; 1.48 mum; 1.55 mum; MQW lasers; absorption loss coefficient; active layer; bulk lasers; multiple-quantum-well lasers; optical confinement factor; slope efficiency; Absorption; Chemical lasers; Fiber lasers; Masers; Optical losses; Optical resonators; Power lasers; Quantum well devices; Quantum well lasers; Semiconductor lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
