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Proceedings Paper

High-speed quantum cascade detector with frequency response of over 20 GHz
Author(s): Tatsuo Dougakiuchi; Tadataka Edamura
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Paper Abstract

We present a high-speed quantum cascade detector (QCD), a mid-infrared photodetector using intersubband transition, with a frequency response of over 20 GHz. The frequency response of an uncooled QCD with the response wavelength of around 4.5 μm was evaluated with a heterodyne beat measurement using two distributed feedback single mode quantum cascade lasers, and -3 and -20 dB cut-off frequency was obtained to be 5 and 20 GHz. The maximum frequency observed in the experiment was 26 GHz with a signal-to-noise ratio of over 20 dB. These wide band mid-infrared photodetectors are expected to offer a high-speed molecular sensing, free-space optical communication, and the other applications.

Paper Details

Date Published: 12 November 2019
PDF: 3 pages
Proc. SPIE 11197, SPIE Future Sensing Technologies, 111970R (12 November 2019); doi: 10.1117/12.2542649
Show Author Affiliations
Tatsuo Dougakiuchi, Hamamatsu Photonics K.K. (Japan)
Tadataka Edamura, Hamamatsu Photonics K.K. (Japan)

Published in SPIE Proceedings Vol. 11197:
SPIE Future Sensing Technologies
Masafumi Kimata; Christopher R. Valenta, Editor(s)

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