Optical characterisation of a camera module developed for ultra-low NEP TES detector arrays at FIR wavelengths

D. Morozov; R. Sudiwala; P. A. R. Ade; D. J. Goldie; D. M. Glowacka; S. Withington; N. A. Trappe

doi:10.1117/12.2232139

19 July 2016 Optical characterisation of a camera module developed for ultra-low NEP TES detector arrays at FIR wavelengths

D. Morozov, R. Sudiwala, P. A. R. Ade, D. J. Goldie, D. M. Glowacka, S. Withington, N. A. Trappe

Author Affiliations +

Proceedings Volume 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII; 991409 (2016) https://doi.org/10.1117/12.2232139
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

Here we report on the optical design and on the spectral-spatial characterisation of a small 16 pixel camera. The prototype uses TES detectors with NEPs ~10^-16 W/Hz^0.5 which have been fabricated with near identical optical coupling structures to mimic their much lower NEP counterparts (~10^-19 W/Hz^0.5). This modification, which is achieved through changing only the pixel thermal conductance, G, has allowed us to perform spectral/spatial cryogenic testing using a 100mK ADR to view room temperature thermal sources. The measurements show a flat spectral response across the waveband and minimal side lobe structure in the antenna patterns down to 30dB.

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D. Morozov, R. Sudiwala, P. A. R. Ade, D. J. Goldie, D. M. Glowacka, S. Withington, and N. A. Trappe "Optical characterisation of a camera module developed for ultra-low NEP TES detector arrays at FIR wavelengths", Proc. SPIE 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII, 991409 (19 July 2016); https://doi.org/10.1117/12.2232139

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