DocumentCode :
1254250
Title :
Spectral behavior of directly modulated laser diodes exposed to Rayleigh backscatter from a single-mode fiber
Author :
Gysel, P. ; Staubli, R.K. ; Hofstetter, R.U.
Author_Institution :
Inst. for Commun. Technol., Swiss Federal Inst. of Technol., Zurich, Switzerland
Volume :
3
Issue :
3
fYear :
1991
fDate :
3/1/1991 12:00:00 AM
Firstpage :
207
Lastpage :
209
Abstract :
The spectral behavior of a laser diode exposed to Rayleigh backscattering (RB) from a single-mode fiber is investigated for arbitrary laser-fiber coupling efficiency, fiber length, and coherence time of the light of the free-running source. It is found that resonance effects in the spectral behavior of laser diodes exposed to RB from a single-mode fiber occur only for coupling efficiencies above a critical value eta /sub c/. This threshold is very low for unmodulated light but it is substantially increased when the light is modulated. A simple mathematical relation is given showing the dependence of the threshold on the fiber length and on the coherence time of the light.<>
Keywords :
Rayleigh scattering; backscatter; fibre optics; optical couplers; optical modulation; semiconductor junction lasers; Rayleigh backscatter; coherence time; directly modulated laser diodes; fiber length; free-running light source coherence; laser-fiber coupling efficiency; modulated light; single-mode fiber; spectral behavior; unmodulated light; Backscatter; Connectors; Diode lasers; Fiber lasers; Optical attenuators; Optical coupling; Optical distortion; Optical feedback; Optical reflection; Optical resonators;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/68.79755
Filename :
79755
Link To Document :
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