High resolution phase demodulation at 1530nm using low-pressure acetylene absorption lines

J. Diaz; S. Stepanov; N. Casillas; M. Ocegueda; E. Hernandez; V. Lebedev; P. Agruzov; A. Shamray

doi:10.1117/12.2586973

5 March 2021 High resolution phase demodulation at 1530nm using low-pressure acetylene absorption lines

J. Diaz, S. Stepanov, N. Casillas, M. Ocegueda, E. Hernandez, V. Lebedev, P. Agruzov, A. Shamray

Proceedings Volume 11700, Optical and Quantum Sensing and Precision Metrology; 117001Y (2021) https://doi.org/10.1117/12.2586973
Event: SPIE OPTO, 2021, Online Only

Abstract

We present results of the experimental investigations of noise characteristics of the self-referencing optical phase demodulator based on a bulk low-pressure acetylene cell at the wavelength 1530.37nm of P9 acetylene absorption line. The configuration is simple, does not need phase locking, and can be operated with high-etendue waves. While the intensity noise of the utilized semiconductor laser at frequency >250MHz was below the photonic noise, the demodulator resolution (i.e., the minimum detectable phase modulation amplitude) was significantly reduced by an excessive laser phase noise. To reduce the output noise, we propose and analyze different balanced detection configurations that increase the resolution to the standard quantum level.

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Citation Download Citation

J. Diaz, S. Stepanov, N. Casillas, M. Ocegueda, E. Hernandez, V. Lebedev, P. Agruzov, and A. Shamray "High resolution phase demodulation at 1530nm using low-pressure acetylene absorption lines", Proc. SPIE 11700, Optical and Quantum Sensing and Precision Metrology, 117001Y (5 March 2021); https://doi.org/10.1117/12.2586973

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