Title :
Frequency multiplication of microwave signals by sideband optical injection locking using a monolithic dual-wavelength DFB laser device
Author :
Laperle, Charles ; Svilans, Mikelis ; Poirier, Maxime ; Têtu, Michel
Author_Institution :
Nortel Wireless Networks, Ottawa, Ont., Canada
fDate :
7/1/1999 12:00:00 AM
Abstract :
Frequency multiplication of a microwave signal was achieved by modulating one arm of a dual-wavelength distibuted-feedback (DPB) laser device and injection locking the other arm of the device on one of the modulation sidebands. The dual-wavelength laser consists of two DFB lasers integrated with a Y-junction combiner on the same semiconductor substrate, thus making a compact device (L=500 μm). The output of the combiner was allowed to beat on a high-speed photodetector. The resulting microwave signal had a narrow line shape superimposed on a Lorentzian pedestal and was at a multiple of the modulating radio frequency. Three regimes of operation of the laser device were also observed: chaotic, self-pulsating, and heterodyne
Keywords :
distributed feedback lasers; frequency multipliers; heterodyne detection; microwave frequency convertors; microwave generation; microwave photonics; optical fibre communication; semiconductor lasers; Lorentzian pedestal; Y-junction combiner; chaotic; heterodyne; high-speed photodetector; microwave signal frequency multiplication; modulation sidebands; monolithic dual-wavelength DFB laser device; narrow line shape; self-pulsating; sideband optical injection locking; Frequency conversion; High speed optical techniques; Injection-locked oscillators; Masers; Microwave devices; Optical mixing; Optical modulation; Photodetectors; Semiconductor lasers; Substrates;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
