DocumentCode :
825952
Title :
Static and dynamic characteristics of VCSELs with polarisation-selective optical feedback
Author :
Li, X.F. ; Pan, W. ; Luo, B. ; Ma, D. ; Deng, G.
Author_Institution :
Sch. of Inf. Sci. & Technol., Southwest Jiaotong Univ., Chengdu, China
Volume :
153
Issue :
2
fYear :
2006
fDate :
4/10/2006 12:00:00 AM
Firstpage :
67
Lastpage :
74
Abstract :
Static and dynamic characteristics of birefringent vertical-cavity surface-emitting lasers (VCSELs) subject to both isotropic and polarisation-selective optical feedback are investigated theoretically. The model considers two orthogonally polarised transverse modes; moreover, the spatial dependences of photon density, carrier density and injection current are taken into account. For a short external cavity, the two-mode VCSELs can be forced to operate with one mode by introducing the polarisation-selective optical feedback. It is further shown that the phase of feedback light determined by the external cavity length affects the laser operation characteristics greatly, that is, when the external cavity length is chosen, the reflected light strengthens (weakens) the optical field in the laser cavity, the mode that has the same polarisation direction can be enhanced (suppressed), while the other mode is suppressed (enhanced) correspondingly. For a relatively long external cavity, the continuous wave operation of VCSELs is destabilised and rich non-linear dynamics are excited. By increasing the external cavity length, the VCSELs follow a period-halving route to chaos. It is also found that the evolution of dynamics shows periodic repetition with respect to the external cavity length, and the period is half of the lasing wavelength. Further investigation shows that, for isotropic feedback, both modes exhibit the same dynamics and similar mode intensity; for polarisation-selective feedback, though similar non-linear behaviours are observed, the modal strengths are quite different, that is, the feedback light enhances one mode while greatly suppressing the orthogonally polarised mode.
Keywords :
birefringence; laser cavity resonators; laser feedback; laser modes; light polarisation; semiconductor lasers; surface emitting lasers; VCSEL; birefringent vertical-cavity surface-emitting lasers; carrier density; external cavity; feedback light phase; injection current; orthogonally polarised transverse modes; photon density; polarisation-selective optical feedback;
fLanguage :
English
Journal_Title :
Optoelectronics, IEE Proceedings -
Publisher :
iet
ISSN :
1350-2433
Type :
jour
DOI :
10.1049/ip-opt:20050069
Filename :
1593511
Link To Document :
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