Traveling-wave photodetectors

The authors propose and analyze the traveling-wave photodetector (TWPD), an edge-coupled photodetector that is capable of both a larger absolute bandwidth and a larger bandwidth-efficiency product than the waveguide photodetector (WGPD). The intrinsic RC bandwidth limitation is increased in the trav...

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Veröffentlicht in:	IEEE photonics technology letters 1992-12, Vol.4 (12), p.1363-1365
Hauptverfasser:	Giboney, K.S., Rodwell, M.J.W., Bowers, J.E.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Bandwidth Circuit properties Electric, optical and optoelectronic circuits Electronics Engineering Engineering, Electrical & Electronic Exact sciences and technology Gallium arsenide Impedance matching Optical and optoelectronic circuits Optical control Optical devices Optical reflection Optical waveguides Optics Photodetectors Physical Sciences Physics Physics, Applied PIN photodiodes Radio control Science & Technology Technology
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Beschreibung
Zusammenfassung:	The authors propose and analyze the traveling-wave photodetector (TWPD), an edge-coupled photodetector that is capable of both a larger absolute bandwidth and a larger bandwidth-efficiency product than the waveguide photodetector (WGPD). The intrinsic RC bandwidth limitation is increased in the traveling-wave photodetector by providing for controlled transmission of the electrical wave down the device in parallel with the optical wave and by eliminating bandwidth-limiting electrical reflections. It is shown that 1- mu m wide, parallel-plate, GaAs/AlGaAs, p-i-n TWPD with open-circuit input termination has a 26% greater potential bandwidth-efficiency product than the comparable WGPD, while a TWPD with matched input termination actually has a worse bandwidth-efficiency product than the WGPD.< >
ISSN:	1041-1135 1941-0174
DOI:	10.1109/68.180577