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 |
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Pages (from-to) | 583-5833 |
Number of pages | 5251 |
Journal | Optics Letters |
Volume | 46 |
Issue number | 23 |
DOIs | |
Publication status | Published - 1 Dec 2021 |