Title :
A novel analytical expression of sensitivity to external optical feedback for DFB semiconductor lasers
Author :
Hirono, T. ; Kurosaki, T. ; Fukuda, M.
Author_Institution :
NTT Opto-electron. Lab., Kanagawa, Japan
fDate :
12/1/1992 12:00:00 AM
Abstract :
A novel analytical expression for DFB laser sensitivity to external optical feedback is derived based on coupled-wave theory. The expression reveals that the sensitivity is proportional to the ratio between the output power from the reflector-side facet and the magnitude of Lagrangian of the electromagnetic field in the cavity. The simplicity of the expression helps in estimating the sensitivity of DFB lasers with complex cavity structures
Keywords :
distributed feedback lasers; feedback; laser cavity resonators; laser theory; semiconductor lasers; sensitivity; DFB semiconductor lasers; Lagrangian; complex cavity structures; coupled-wave theory; electromagnetic field; external optical feedback; laser cavities; output power; reflector-side facet; sensitivity; Bragg gratings; Optical feedback; Optical refraction; Optical sensors; Optical variables control; Optical waveguides; Output feedback; Reflectivity; Refractive index; Waveguide junctions;
Journal_Title :
Quantum Electronics, IEEE Journal of
