Title :
Electrooptic phase tracking of microwave signals beyond 18.5 GHz using an integrated electrooptic modulator as an optoelectronic harmonic mixer in a phase lock loop
Author :
Pan, Ci-Ling ; Lin, Gong-Ru ; Chyou, Dean-Yu ; Wu, Hsiao-Hua
Author_Institution :
Inst. of Electro-Opt. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
4/1/1994 12:00:00 AM
Abstract :
We demonstrate electrooptic phase tracking of microwave signals beyond 18.5 GHz using a gain-switched laser diode as the optical clock. The key element of this system is a fiber-pigtailed integrated-optic Mach-Zehnder modulator (IOM). The IOM functions as an optoelectronic harmonic mixer in a phase lock loop. The conversion loss of the OEHM is 66 dB. The phase error and the single sideband phase noise density of the phase-locked 18.5 GHz signal is 5.6/spl times/10/sup /spl minus/5/ rad//spl radic/(Hz) and -54 dBc/Hz, respectively.<>
Keywords :
electro-optical devices; integrated optics; laser beam applications; microwave links; mixers (circuits); optical links; optical modulation; optoelectronic devices; phase-locked loops; synchronisation; tracking; 18.5 GHz; 66 dB; PLL; conversion loss; electrooptic phase tracking; fiber-pigtailed configuration; gain-switched laser diode; integrated electrooptic modulator; integrated-optic Mach-Zehnder modulator; microwave signals; optical clock; optoelectronic harmonic mixer; phase error; phase lock loop; single sideband phase noise density; Clocks; Electrooptic modulators; High speed optical techniques; Integrated optics; Lasers and electrooptics; Microwave oscillators; Optical fiber communication; Optical losses; Optical modulation; Voltage-controlled oscillators;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
