Title :
The onset of coherence collapse in DFB lasers
Author :
Woodward, S.L. ; Thompson, E.J.
Author_Institution :
AT&T Bell Labs., Crawford Hill Lab., Holmdel, NJ, USA
fDate :
3/1/1992 12:00:00 AM
Abstract :
How the onset of coherence collapse in distributed-feedback (DFB) lasers varies with the laser output power has been measured. Theory predicts that as a laser´s output power is increased, the amount of back-reflected light necessary to cause coherence collapse should also increase, yet two of the four lasers studied become dramatically more sensitive to back reflections at higher output powers. It is speculated that changes in the carrier density in these lasers cause this device-dependent behavior.<>
Keywords :
carrier density; distributed feedback lasers; light coherence; light reflection; semiconductor junction lasers; sensitivity; DFB lasers; back-reflected light; carrier density; coherence collapse; collapse onset; device-dependent behavior; diode lasers; distributed-feedback; laser output power; sensitive; Laser beams; Laser modes; Laser theory; Optical attenuators; Optical interferometry; Optical reflection; Optical sensors; Power generation; Power lasers; Power measurement;
Journal_Title :
Photonics Technology Letters, IEEE
