Title :
Tunable millimeter-wave generation with subharmonic injection locking in two-section strongly gain-coupled DFB lasers
Author :
Hong, Jin ; Hui, Rongqing
Author_Institution :
Nortel Networks Corp., Ottawa, Ont., Canada
fDate :
5/1/2000 12:00:00 AM
Abstract :
Using two-section dual-mode strongly gain-coupled (SGC) distributed feedback (DFB) lasers, tunable millimeter-wave (mm-wave) generation from 18 to 40 GHz can he achieved under CW bias conditions. Due to its high speed and excellent dynamic single-mode yield in SGC DFB lasers, each section can be individually modulated to beyond 10 GHz. Using subharmonic injection locking, the linewidth of the generated mm-wave can be significantly reduced and is found to be less than 30 Hz which is limited by stability of the microwave source and the resolution of the spectrum analyzer. This device provides a useful source to high-bit-rate optical systems and/or high-frequency wireless communications.
Keywords :
distributed feedback lasers; laser feedback; laser mode locking; laser stability; laser tuning; microwave photonics; millimetre wave generation; optical transmitters; quantum well lasers; ridge waveguides; spectral analysers; spectral line breadth; waveguide lasers; 18 to 40 GHz; CW bias conditions; dynamic single-mode yield; generated mm-wave; high-bit-rate optical systems; high-frequency wireless communications; microwave source; spectrum analyzer resolution; stability; subharmonic injection locking; tunable millimeter-wave generation; tunable mm-wave generation; two-section strongly gain-coupled DFB lasers; Distributed feedback devices; High speed optical techniques; Injection-locked oscillators; Laser feedback; Masers; Microwave devices; Microwave generation; Spectral analysis; Stability analysis; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
