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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | McDougall, S.D. Jubber, M.J. Kowalski, O.P. Boyd, A.R. Stanely, C.R. Marsh, J.H. Aitchison, J.S. |
| Copyright Year | 1999 |
| Description | Author affiliation: Dept. of Electron. & Electr. Eng., Glasgow Univ., UK (McDougall, S.D.) |
| Abstract | Conventional vertical access photodiodes, where the light is input perpendicular to the plane of the absorbing layer, suffer from low efficiency at RF modulation frequencies due to the thin intrinsic absorption region required for short carrier drift times. Horizontal access as waveguide photodiodes (WGPD) and travelling wave photodetectors (TWPD), where light is guided along the absorbing layer for several absorption lengths, circumvent this problem and allow /spl sim/100% absorption of the input signal despite extremely thin depleted regions (/spl sim/200 nm). One potential drawback of such devices is the catastrophic optical damage (GOD) which can occur at relatively modest power densities at the input facet of the waveguide. This is due to the temperature rise at the input facet. As many important applications of RF photodetectors require high power, this could be a severe limitation. Possible solutions to this problem include using very low absorption coefficient waveguides and the use of pseudo-window regions at the input facet. In the paper we present a simple method for producing a non-absorbing input facet function for a WGPD, or a TWPD, using quantum well intermixing (QWI) technology. |
| Starting Page | 810 |
| Ending Page | 811 |
| File Size | 166701 |
| Page Count | 2 |
| File Format | |
| ISBN | 0780356349 |
| ISSN | 10928081 |
| DOI | 10.1109/LEOS.1999.811981 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1999-11-08 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Gallium arsenide PIN photodiodes Optical waveguides Absorption Radio frequency Photodetectors Frequency modulation Optical modulation Ultraviolet sources Optical devices |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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