Title :
Reception of frequency-modulated optical signals through intracavity optical power change in injection-locked lambda /4-shifted DFB laser
Author :
Nakajima, Hiromasa ; Derouiche, R. ; Charil, J. ; Correc, P.
Author_Institution :
CNET, Bagneux, France
fDate :
7/2/1992 12:00:00 AM
Abstract :
A high efficiency optical frequency discriminator/photodetector exhibiting a conversion efficiency exceeding 1 mV/GHz is described. The operating principle consists in monitoring the intracavity optical power change induced by optical FM signals through the voltage change in the phase shifter region of an injection-locked 1.53 mu m GaInAs/GaInAsP/InP three-section two-contact lambda /4-shifted MQW DFB laser. This principle is demonstrated by demodulating FSK signals at 700 Mbit/s using neither an interferometer nor an additional photodetector. A receiver sensitivity of -21.9 dBm is reported with an NRZ (27-1) PRBS.
Keywords :
demodulation; discriminators; distributed feedback lasers; frequency modulation; laser beam applications; optical communication equipment; photodetectors; receivers; semiconductor junction lasers; 1.53 micron; 700 Mbit/s; DFB laser; FSK signals; GaInAs-GaInAsP-InP; MQW; conversion efficiency; frequency-modulated optical signals; injection-locked; intracavity optical power change; lambda /4-shifted; optical FM signals; optical frequency discriminator; phase shifter region; photodetector; receiver sensitivity; semiconductor lasers; three-section two-contact; voltage change;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920852
