Title :
Optoelectronic phase-locking of microwave signals up to 18 GHz by a laser-diode-based GaAs:Cr photoconductive harmonic mixer
Author :
Wu, Hsiao-Hua ; Chang, Chen-Shiung ; Pan, Ci-Ling
Author_Institution :
Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
A GaAs:Cr photoconductive switch activated by 30-ps optical pulses from a gain-switched laser diode ( lambda =0.79 mu m) was used as a harmonic mixer to optoelectronically phase-lock microwave signals up to 18.01 GHz. The conversion loss of the harmonic mixer was 70 dB at 16.01 GHz. The phase noise degradation of the phase-locked 16.01-GHz signal at 5-kHz offset measured with respect to the 1.0-GHz synthesizer signal for driving the laser diode was 30 dB.<>
Keywords :
III-V semiconductors; chromium; gallium arsenide; laser beam applications; mixers (circuits); optoelectronic devices; phase-locked loops; photoconducting devices; semiconductor switches; solid-state microwave circuits; 0.79 micron; 18 GHz; 30 ps; 70 dB; GaAs:Cr photoconductive switch; PLL; conversion loss; gain-switched laser diode; harmonic mixer; microwave signals; optoelectronic phase-locking; phase-locking of microwave signals; picosecond optical pulses; Degradation; Diode lasers; Noise measurement; Optical losses; Optical pulses; Optical switches; Phase measurement; Phase noise; Photoconductivity; Synthesizers;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
