Enhancement of the angular rotation measurement sensitivity based on SU(2) and SU(1,1) interferometers

Jun Liu; Wenxiao Liu; Shitao Li; Dong Wei; Hong Gao; Fuli Li

doi:10.1364/PRJ.5.000617

Journals >Photonics Research >Volume 5 >Issue 6 >Page 617 > Article

Photonics Research
Vol. 5, Issue 6, 617 (2017)

Enhancement of the angular rotation measurement sensitivity based on SU(2) and SU(1,1) interferometers

Jun Liu, Wenxiao Liu, Shitao Li, Dong Wei, Hong Gao^*, and Fuli Li

Author Affiliations

Key Laboratory of Quantum Information and Quantum Optoelectronic Devices of Shaanxi Province, School of Science, Xi’an Jiaotong University, Xi’an 710049, China

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DOI: 10.1364/PRJ.5.000617 Cite this Article Set citation alerts

Jun Liu, Wenxiao Liu, Shitao Li, Dong Wei, Hong Gao, Fuli Li. Enhancement of the angular rotation measurement sensitivity based on SU(2) and SU(1,1) interferometers[J]. Photonics Research, 2017, 5(6): 617 Copy Citation Text

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Scheme for the angular rotation measurement uses a coherent beam carrying OAM and a vacuum beam. The coherent beam comes from input-port a and has an OAM of lℏ and is detected by the method of HD. M, mirror; DP, Dove prism; LO, local beam.

Fig. 1. Scheme for the angular rotation measurement uses a coherent beam carrying OAM and a vacuum beam. The coherent beam comes from input-port a and has an OAM of lℏ and is detected by the method of HD. M, mirror; DP, Dove prism; LO, local beam.

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SU(1,1) interferometer for the angular rotation measurement uses a coherent beam and a vacuum beam. The beam comes from input-port a carries an OAM of lℏ. Note that two PA processes replace two BS compared with Fig. 1.

Fig. 2. SU(1,1) interferometer for the angular rotation measurement uses a coherent beam and a vacuum beam. The beam comes from input-port a carries an OAM of lℏ. Note that two PA processes replace two BS compared with Fig. 1.

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Fig. 3. SU(1,1) interferometer for the angular rotation measurement uses a coherent beam and a vacuum beam. The pump beam has an OAM of lℏ, and the probe beam has no OAM.

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