Algebraic cancellation of inter-channel cross talk in multiplexed heterodyne interferometry

Anneshwa Dey; Ya Zhang; Justin Wong; Paul G. Sibley; Chathura P. Bandutunga; Malcolm B. Gray; Jong H. Chow

doi:10.1364/OL.444116

Algebraic cancellation of inter-channel cross talk in multiplexed heterodyne interferometry

Anneshwa Dey^*, Ya Zhang, Justin Wong, Paul G. Sibley, Chathura P. Bandutunga, Malcolm B. Gray, Jong H. Chow

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We demonstrate the algebraic cancellation of residual phase cross talk in digitally enhanced heterodyne interferometry (DEHeI), a code division multiplexing technique for interferometric sensing. By using linear combinations of parallel decoding operations at multiple delays, we synthesize a zero correlation for spurious signals and remove phase cross talk: a method we call offset decoding. We experimentally demonstrate 70 dB of signal isolation and over 40 dB greater isolation than the equivalent standard implementation of DEHeI.

Original language	English
Pages (from-to)	583-5833
Number of pages	5251
Journal	Optics Letters
Volume	46
Issue number	23
DOIs	https://doi.org/10.1364/OL.444116
Publication status	Published - 1 Dec 2021

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abstract = "We demonstrate the algebraic cancellation of residual phase cross talk in digitally enhanced heterodyne interferometry (DEHeI), a code division multiplexing technique for interferometric sensing. By using linear combinations of parallel decoding operations at multiple delays, we synthesize a zero correlation for spurious signals and remove phase cross talk: a method we call offset decoding. We experimentally demonstrate 70 dB of signal isolation and over 40 dB greater isolation than the equivalent standard implementation of DEHeI.",

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AU - Dey, Anneshwa

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AU - Wong, Justin

AU - Sibley, Paul G.

AU - Bandutunga, Chathura P.

AU - Gray, Malcolm B.

AU - Chow, Jong H.

PY - 2021/12/1

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N2 - We demonstrate the algebraic cancellation of residual phase cross talk in digitally enhanced heterodyne interferometry (DEHeI), a code division multiplexing technique for interferometric sensing. By using linear combinations of parallel decoding operations at multiple delays, we synthesize a zero correlation for spurious signals and remove phase cross talk: a method we call offset decoding. We experimentally demonstrate 70 dB of signal isolation and over 40 dB greater isolation than the equivalent standard implementation of DEHeI.

AB - We demonstrate the algebraic cancellation of residual phase cross talk in digitally enhanced heterodyne interferometry (DEHeI), a code division multiplexing technique for interferometric sensing. By using linear combinations of parallel decoding operations at multiple delays, we synthesize a zero correlation for spurious signals and remove phase cross talk: a method we call offset decoding. We experimentally demonstrate 70 dB of signal isolation and over 40 dB greater isolation than the equivalent standard implementation of DEHeI.

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Algebraic cancellation of inter-channel cross talk in multiplexed heterodyne interferometry

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