Title :
Degradation behavior of narrow-spectral-linewidth DFB lasers for super-wide-band FM conversion
Author :
Oohashi, Hiromi ; Fukuda, Mitsuo ; Kano, Fumiyoshi ; Yokomizo, Katsuya ; Yoshikuni, Yuzo ; Toba, Hiromu
Author_Institution :
NTT Opto-Electron. Labs., Kanagawa, Japan
Abstract :
The feasibility of using narrow-spectral-linewidth distributed-feedback lasers as subcarrier multiplexing video distribution sources in optical heterodyne FM converters is shown by investigating degradation modes of the lasers. There is no change in the dynamic properties, such as the FM response and the composite second-order and composite triple-beat figures, though spectral linewidth is increased by degradation. The main degradation appears as an increase in spectral linewidth due to 1/f noise caused by buried heterointerface degradation. The FM response, composite second-order, and composite triple-beat, however, hardly change in the degradation process
Keywords :
distributed feedback lasers; electro-optical modulation; frequency modulation; optical fibre subscriber loops; optical transmitters; semiconductor lasers; spectral line breadth; subcarrier multiplexing; television networks; 1/f noise; FM response; buried heterointerface degradation; composite second-order; composite triple-beat figures; degradation behavior; degradation modes; dynamic properties; narrow-spectral-linewidth DFB; narrow-spectral-linewidth distributed-feedback lasers; optical heterodyne FM converters; spectral linewidth; subcarrier multiplexing video distribution sources; super-wide-band FM conversion; Aging; Degradation; Fiber lasers; Laser modes; Laser noise; Optical distortion; Optical mixing; Passive optical networks; Quantum well devices; Testing;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/2944.788405
