High-speed quantum cascade detector with frequency response of over 20 GHz

Tatsuo Dougakiuchi; Tadataka Edamura

doi:10.1117/12.2542649

12 November 2019 High-speed quantum cascade detector with frequency response of over 20 GHz

Tatsuo Dougakiuchi, Tadataka Edamura

Proceedings Volume 11197, SPIE Future Sensing Technologies; 111970R (2019) https://doi.org/10.1117/12.2542649
Event: SPIE Future Sensing Technologies, 2019, Tokyo, Japan

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.

Citation Download Citation

Tatsuo Dougakiuchi and Tadataka Edamura "High-speed quantum cascade detector with frequency response of over 20 GHz", Proc. SPIE 11197, SPIE Future Sensing Technologies, 111970R (12 November 2019); https://doi.org/10.1117/12.2542649

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