dorsal/arxiv
View SchemaControllable Anomalous Dispersion and Group Index Nulling via Bi-Frequency Raman Gain in Rb Vapor for application to Ultraprecision Rotation Sensing
| Authors | G. S. Pati, Renu Tripathi, M. Messall, K. Salit, M. S. Shahriar |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0512260 |
| URL | https://arxiv.org/abs/quant-ph/0512260 |
Abstract
We have recently proposed [9], the use of fast-light media to obtain ultrahigh precision rotation sensing capabilities. The scheme relies on producing a critically anomalous dispersion, in a suitable dispersive medium, which is introduced in the arms of a Sagnac interferometer. We present here an experimental investigation of the anomalous dispersion properties of bi-frequency Raman gain in rubidium vapor, with the goal of using this medium for producing the critically anomalous dispersion condition. A heterodyne phase measurement technique is used to measure accurately the index variation associated with the dispersion. The slope of the negative linear dispersion (or group index) is experimentally varied by more than two orders of magnitude while changing the frequency separation between pump fields, responsible for producing gain. Using this result, we have identified the experimental parameters for achieving a null value of the group index, corresponding to the critically anomalous dispersion condition necessary for enhanced rotational sensitivity.
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"abstract": "We have recently proposed [9], the use of fast-light media to obtain\nultrahigh precision rotation sensing capabilities. The scheme relies on\nproducing a critically anomalous dispersion, in a suitable dispersive medium,\nwhich is introduced in the arms of a Sagnac interferometer. We present here an\nexperimental investigation of the anomalous dispersion properties of\nbi-frequency Raman gain in rubidium vapor, with the goal of using this medium\nfor producing the critically anomalous dispersion condition. A heterodyne phase\nmeasurement technique is used to measure accurately the index variation\nassociated with the dispersion. The slope of the negative linear dispersion (or\ngroup index) is experimentally varied by more than two orders of magnitude\nwhile changing the frequency separation between pump fields, responsible for\nproducing gain. Using this result, we have identified the experimental\nparameters for achieving a null value of the group index, corresponding to the\ncritically anomalous dispersion condition necessary for enhanced rotational\nsensitivity.",
"arxiv_id": "quant-ph/0512260",
"authors": [
"G. S. Pati",
"Renu Tripathi",
"M. Messall",
"K. Salit",
"M. S. Shahriar"
],
"categories": [
"quant-ph"
],
"title": "Controllable Anomalous Dispersion and Group Index Nulling via Bi-Frequency Raman Gain in Rb Vapor for application to Ultraprecision Rotation Sensing",
"url": "https://arxiv.org/abs/quant-ph/0512260"
},
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