Open AccessExperimental and numerical analysis on temporal dynamics of polarization switching in an injection-locked 155-μm wavelength VCSEL
Author(s) -
Vijay Manohar Deshmukh,
Seoung Hun Lee,
Dong Wook Kim,
Kyong Hon Kim,
Min Hee Lee
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.016934
Subject(s) - vertical cavity surface emitting laser , optics , polarization (electrochemistry) , materials science , orthogonal polarization spectral imaging , wavelength , laser , optoelectronics , polarization rotator , injection locking , semiconductor laser theory , physics , birefringence , chemistry
We present experimental and numerical study of temporal characteristics of injection-locked polarization switching of a conventional-type 1.55-μm wavelength single-mode vertical cavity surface-emitting laser (VCSEL). Delayed recovery response of the main-mode of the VCSEL was observed when short and strong optical injection pulses of an orthogonal polarization to the VCSEL's main polarization-mode were applied. Numerical analysis based on a spin-flip model describes that the relatively long upper level lifetimes compared to a short injection-pulse width and long cavity photon lifetimes cause delayed recovery response of the main-mode of the VCSEL. An optimum bias current of the VCSEL was also observed for the shortest recovery time of its free-running polarization mode after the orthogonal polarization beam pulse injection.