10 June 1994 Spectral characterization of microwave signals generated by the heterodyne of injection-locked semiconductor lasers
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Abstract
Optical heterodyne has been proposed to generate the microwave signals to be used in phased array antenna systems. Optical injection-locking of secondary lasers to distinct FM-sidebands of a current-modulated laser diode has been used to improve the spectral purity of the microwave signal generated by heterodyne. A very narrow linewidth microwave signal superimposed over a Lorentzian shaped noise floor has been obtained. The spectral purity of the produced microwave signal has been characterized by three distinct means: power spectrum, phase fluctuations, and time-domain frequency stability (Allan variance). The power spectrum shows a linewidth smaller than 25 mHz (FWHM) and the Allan standard deviation gives a level 1 X 10-11 for an averaging time of 1 sec.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Martin Chamberland, Martin Chamberland, Michel Tetu, Michel Tetu, Pierre Tremblay, Pierre Tremblay, } "Spectral characterization of microwave signals generated by the heterodyne of injection-locked semiconductor lasers", Proc. SPIE 2155, Optoelectronic Signal Processing for Phased-Array Antennas IV, (10 June 1994); doi: 10.1117/12.177426; https://doi.org/10.1117/12.177426
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