Harmonic phase and amplitude beam characterization of a wideband on-chip spectrometer

Yates, Stephen J.C.; Karatsu, K.; Moerman, A.; Dabironezare, S.O.; Endo, A.; Baselmans, J. J.A.

Harmonic phase and amplitude beam characterization of a wideband on-chip spectrometer

Abstract (2022)

Authors

Stephen J.C. Yates SRON–Netherlands Institute for Space Research, Tera-Hertz Sensing

K. Karatsu SRON–Netherlands Institute for Space Research, Tera-Hertz Sensing

A. Moerman Tera-Hertz Sensing

S.O. Dabironezare Tera-Hertz Sensing

A. Endo Tera-Hertz Sensing

J. J.A. Baselmans SRON–Netherlands Institute for Space Research, Tera-Hertz Sensing

Research Group

Tera-Hertz Sensing

Microwave kinetic inductance detector Optical characterization Complex field mapping Direct detectors

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Published Date

2022

Language

English

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Research Group

Tera-Hertz Sensing

Abstract

We present a phase and amplitude beam pattern measurement technique using harmonic mixers. This allows a simultaneous multi-frequency phase sensitive characterization of a low resolution and wideband (220-420GHz) on-chip spectrometer using microwave kinetic inductance detectors. We investigate the beam quality, in particular the beam pointing and inferred telescope coupling and hence aperture efficiency. The measurements match the goal requirements for the DESHIMA-2 instrument for the ASTE telescope. The technique would be of interest for any (direct detector) spectrometer with a wide instantaneous bandwidth, particularly ones with dispersive components.