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Traveling-wave photodetector for 1.55 μm wavelength fabricated with unitraveling-carrier photodiodes (2001)

Hirota, Y. ; Hirono, T. ; Ishibashi, T. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 78 (2001), S. 3767-3769

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: We report on a periodic traveling-wave photodetector (P-TW-PD) fabricated by unicarrier traveling photodiodes (UTC-PDs). It is comprised of three UTC-PDs periodically arranged along a coplanar waveguide transmission line. The photoresponse of the P-TW-UTC-PD is three times that of a single UTC-PD. A 3 dB bandwidth (f3dB) of 115 GHz at 1.55 μm was observed in a P-TW-UTC-PD with a terminal resistor located at the input end. This value of f3dB is almost the same as that observed in a single UTC-PD. In P-TW-UTC-PDs with no terminal resistor, the 3 dB bandwidth degrades to 56 GHz as a result of the reflection of backward-propagating microwaves at the input end. We conclude that our P-TW-UTC-PD provides velocity matching between electrical and optical waves. © 2001 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1377849

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