Title :
Analysis of wavelength conversion using a multisection DBR laser with a saturable absorber
Author :
Paradisi, A. ; Montrosset, Ivo
Author_Institution :
Dipartimento di Elettronica, Politecnico de Torino, Italy
fDate :
5/1/1993 12:00:00 AM
Abstract :
The static performance of a wavelength converter obtained by a multisection distributed Bragg reflector (DBR) laser with a saturable absorber between two gain sections is analyzed. For this device an optical input signal at one given wavelength is converted into an output signal at the lasing wavelength. The performances are evaluated in terms of conversion efficiency, suppression ratio, and minimum input power needed for wavelength conversion. It is shown that a proper choice of the injected signal wavelength with respect to the lasing wavelength enhances the conversion efficiency and the suppression ratio and reduces the switching power. The performance can be enhanced also by increasing the electrical current applied to the first gain section provided that the second gain section is biased above the transparency level. The authors have shown that reduction of the front facet reflectivity results in a dramatic increase for the conversion efficiency. The sensitivity to the electrical bias condition and to the resonant condition of the injected signal with respect to the cavity has also been investigated
Keywords :
distributed Bragg reflector lasers; laser theory; optical frequency conversion; optical saturable absorption; reflectivity; semiconductor lasers; conversion efficiency; distributed Bragg reflector; electrical current; front facet reflectivity; gain sections; injected signal wavelength; lasing wavelength; minimum input power; multisection DBR laser; optical input signal; saturable absorber; static performance; suppression ratio; switching power; transparency level; wavelength conversion; wavelength converter; Distributed Bragg reflectors; Optical devices; Optical sensors; Optical wavelength conversion; Performance analysis; Performance evaluation; Performance gain; Reflectivity; Resonance; Wavelength conversion;
Journal_Title :
Quantum Electronics, IEEE Journal of