Title :
Parameter extraction from DFB lasers by means of a simple expression for the spontaneous emission spectrum
Author :
Schatz, Richard ; Berglind, Eilert ; Gillner, Lars
Author_Institution :
Lab. of Photonics and Microwave Eng., R. Inst. of Technol., Kista, Sweden
Abstract :
A simple expression for the amplified spontaneous emission from a laser biased below lasing threshold is applied to semiconductor laser parameter extraction. We demonstrate that accurate measurement of the coupling coefficient for distributed feedback (DFB) lasers with phaseshifts and end reflections is a practical possibility. It is also shown that the used expression, for a reciprocal device, can be derived directly from the wave equation using the Green´s function.<>
Keywords :
Green´s function methods; distributed feedback lasers; laser theory; semiconductor lasers; superradiance; DFB lasers; Green´s function; accurate measurement; amplified spontaneous emission; coupling coefficient; distributed feedback lasers; end reflections; lasing threshold; phaseshifts; reciprocal device; semiconductor laser parameter extraction; spontaneous emission spectrum; wave equation; Distributed feedback devices; Green´s function methods; Laser feedback; Optical coupling; Optical reflection; Parameter extraction; Partial differential equations; Phase measurement; Semiconductor lasers; Spontaneous emission;
Journal_Title :
Photonics Technology Letters, IEEE
