Continuously tunable modulation scheme for homodyne detection and state tomography.
Opt Express
; 31(16): 26378-26382, 2023 Jul 31.
Article
em En
| MEDLINE
| ID: mdl-37710500
ABSTRACT
Homodyne detection is a common self-referenced technique to extract optical quadratures. Due to ubiquitous fluctuations, experiments measuring optical quadratures require homodyne angle control. Current homodyne angle locking techniques only provide high quality error signals in a span significantly smaller than π radians, the span required for full state tomography, leading to inevitable discontinuities during full tomography. Here, we present and demonstrate a locking technique using a universally tunable modulator which produces high quality error signals at an arbitrary homodyne angle. Our work enables continuous full-state tomography and paves the way to backaction evasion protocols based on a time-varying homodyne angle.
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MEDLINE
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En
Ano de publicação:
2023
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Article