Title :
Microwave and mm wave photo-coinductive three-wave mixers for coherent detection and downconversion of optical signals
Author :
Everard, J.K.A. ; Thomas, R.
Author_Institution :
Dept. of Electron. & Electr. Eng., King´´s Coll., London, UK
Abstract :
Results are presented for InP and GaAs MMIC (monolithic microwave integrated circuit) photoconductive three-wave mixers. In these mixers two optical signals offset by 33 GHz are multiplied together with a microwave signal, all within the same device, to produce a low-frequency IF signal of a few hundred megahertz. The results are compared with the theory in which it is shown that these detectors are capable of operation up to millimeter wavelengths with 10% bandwidths and ideal sensitivities often better than those of ideal photodiodes. These mixers can be used for coherent detection and downconversion of optical signals and as optoelectronic phase detectors.<>
Keywords :
III-V semiconductors; MMIC; frequency convertors; gallium arsenide; indium compounds; integrated optoelectronics; mixers (circuits); optical frequency conversion; photodetectors; EHF; GaAs; InP; MIMIC; MM-waves; MMIC; bandwidths; coherent detection; downconversion of optical signals; low-frequency IF signal; microwave signal; millimeter wavelengths; monolithic microwave integrated circuit; optical signals; optoelectronic phase detectors; photoconductive three-wave mixers; semiconductors; sensitivities; Gallium arsenide; Indium phosphide; MMICs; Microwave devices; Microwave integrated circuits; Monolithic integrated circuits; Optical devices; Optical sensors; Phase detection; Photoconducting devices;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99564
