THz photomixing employing travelling-wave photodetectors

This paper reports on recent advances n the optical generation of continuous-wave THz signal by photomixing in ultra high-frequency 1.55/spl mu/m travelling-wave photodetectors (TWPD). We discuss the fundamental physical effects determining the frequency dependent quantum efficiency and saturation o...

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Hauptverfasser:	Stohr, A., Malcoci, A., Jager, D.
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Applied sciences Circuit properties Electric, optical and optoelectronic circuits Electronics Equivalent circuits Exact sciences and technology Frequency dependence Integrated optics Integrated optics. Optical fibers and wave guides Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits Optical and optoelectronic circuits Optical mixing Optical propagation Optical saturation Optoelectronic devices Photodetectors Radiocommunications Radiowave propagation Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Signal generators Stimulated emission Telecommunications Telecommunications and information theory Ultra wideband technology
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Beschreibung
Zusammenfassung:	This paper reports on recent advances n the optical generation of continuous-wave THz signal by photomixing in ultra high-frequency 1.55/spl mu/m travelling-wave photodetectors (TWPD). We discuss the fundamental physical effects determining the frequency dependent quantum efficiency and saturation output current of TWPD. An extended equivalent circuit for a TWPD is presented covering electrical wave propagation effects at frequencies above 1 THz. The power penalty in TWPD due to velocity mismatch is theoretically investigated. Experimentally, ultra-wideband (0.06-1 THz) optical heterodyne photomixing employing a 1.55/spl mu/m TWPD coupled to a rectangular WR10 waveguide is presented as well as photonic emitter modules employing TWPDs integrated with planar antenna structures.
ISSN:	0149-645X 2576-7216
DOI:	10.1109/MWSYM.2004.1335867