dorsal/arxiv
View SchemaOptimum Small Optical Beam Displacement Measurement
| Authors | Magnus T. L. Hsu, Vincent Delaubert, Ping Koy Lam, Warwick Bowen |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0407209 |
| URL | https://arxiv.org/abs/quant-ph/0407209 |
| DOI | 10.1088/1464-4266/6/12/003 |
| Journal | J. Opt. B: Quantum Semiclass. Opt. 6 (2004) 495-501 |
Abstract
We derive the quantum noise limit for the optical beam displacement of a TEM00 mode. Using a multimodal analysis, we show that the conventional split detection scheme for measuring beam displacement is non-optimal with 80% efficiency. We propose a new displacement measurement scheme that is optimal for small beam displacement. This scheme utilises a homodyne detection setup that has a TEM10 mode local oscillator. We show that although the quantum noise limit to displacement measurement can be surpassed using squeezed light in appropriate spatial modes for both schemes, the TEM10 homodyning scheme out-performs split detection for all values of squeezing.
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"abstract": "We derive the quantum noise limit for the optical beam displacement of a\nTEM00 mode. Using a multimodal analysis, we show that the conventional split\ndetection scheme for measuring beam displacement is non-optimal with 80%\nefficiency. We propose a new displacement measurement scheme that is optimal\nfor small beam displacement. This scheme utilises a homodyne detection setup\nthat has a TEM10 mode local oscillator. We show that although the quantum noise\nlimit to displacement measurement can be surpassed using squeezed light in\nappropriate spatial modes for both schemes, the TEM10 homodyning scheme\nout-performs split detection for all values of squeezing.",
"arxiv_id": "quant-ph/0407209",
"authors": [
"Magnus T. L. Hsu",
"Vincent Delaubert",
"Ping Koy Lam",
"Warwick Bowen"
],
"categories": [
"quant-ph"
],
"doi": "10.1088/1464-4266/6/12/003",
"journal_ref": "J. Opt. B: Quantum Semiclass. Opt. 6 (2004) 495-501",
"title": "Optimum Small Optical Beam Displacement Measurement",
"url": "https://arxiv.org/abs/quant-ph/0407209"
},
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