DocumentCode :
1439210
Title :
Jitter dynamics of a gain switched semiconductor laser under self-feedback and external optical injection
Author :
Daza, Marlon Rosendo H ; Saloma, Caesar A.
Author_Institution :
Nat. Inst. of Phys., Univ. of the Philippines, Quezon City, Philippines
Volume :
37
Issue :
2
fYear :
2001
fDate :
2/1/2001 12:00:00 AM
Firstpage :
254
Lastpage :
264
Abstract :
We investigate the jitter dynamics of a gain switched laser diode (LD) under the influence of strong optical injection due either to multiple reflections from an external cavity mirror, or from another LD. A numerical technique that considers both the spontaneous emission noise and multiple reflections from external optical components is implemented. At all times, the LD exhibits multi-longitudinal mode operation with a Gaussian-shaped spectral line profile that is centered around a fixed dominant output wavelength. We separately consider three (strong) optical injection conditions: 1) coherent self-feedback; 2) incoherent self-feedback; and 3) coherent, external continuous-wave (CW) optical injection. Incoherent self-feedback results in a reduction, by an order of magnitude, in both the intensity and timing jitter (0.5 ps), while maintaining the average peak power and pulsewidth. Eye pattern results show an opening of at least 90 %, which represents an improvement by a factor of two over the same LD that operates without optical injection. The external CW injection condition approaches that of incoherent self-feedback only at high external injection. Coherent self-feedback does not produce any significant change in the LD performance
Keywords :
laser cavity resonators; laser feedback; laser mirrors; laser modes; laser noise; laser theory; light coherence; semiconductor device models; semiconductor lasers; timing jitter; Gaussian-shaped spectral line profile; average peak power; coherent self-feedback; dominant output wavelength; external CW optical injection; external cavity mirror; external optical components; external optical injection; gain switched semiconductor laser; high external injection; incoherent self-feedback; jitter dynamics; multi-longitudinal mode operation; multiple reflections; pulsewidth; self-feedback; spontaneous emission noise; timing jitter; Acoustic reflection; Diode lasers; Jitter; Laser noise; Mirrors; Optical devices; Optical noise; Optical reflection; Semiconductor lasers; Stimulated emission;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/3.903076
Filename :
903076
Link To Document :
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