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Frequency multiplication of microwave signals by sideband optical injection locking using a monolithic dual-wavelength DFB laser device

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4 Author(s)
Laperle, C. ; Nortel Wireless Networks, Ottawa, Ont., Canada ; Svilans, M. ; Poirier, M. ; Têtu, M.

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

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:47 ,  Issue: 7 )