Nonlinear optical effects in the acetylene filled microstructured fibers with Maxwell distribution of relaxation rates

S. Stepanov; N. Casillas; M. Ocegueda; J. Diaz; E. Hernandez

doi:10.1117/12.2545814

25 February 2020 Nonlinear optical effects in the acetylene filled microstructured fibers with Maxwell distribution of relaxation rates

S. Stepanov, N. Casillas, M. Ocegueda, J. Diaz, E. Hernandez

Author Affiliations +

Proceedings Volume 11296, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II; 1129620 (2020) https://doi.org/10.1117/12.2545814
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

Analysis of influence of the Maxwell distribution of the transverse thermal velocities and of the flight-time-determined characteristic relaxation rates (i.e. the inverse relaxation times T_1,2) of the acetylene (C₂H₂) molecules in the hollow-core photonic crystal fiber on nonlinear optical effects are presented. The theoretical predictions are compared with the experimental data obtained in the ~0.4Torr acetylene-filled fiber cell at the wavelength 1530.37nm of the most effective P9 vibrational-rotational transition of ¹²C₂H₂. At room temperature and the fiber mode field diameter of 7.5 μm, the average transverse thermal velocity of ~390m/s ensured relaxation times T_1,2 ~8-10ns. These are in good agreement with the corresponding values experimentally measured using delayed optical nutation and two-photon echo techniques. The experimentally observed nonlinear effect of the polarization ellipse self-rotation proves to be at least two orders of magnitude less efficient comparing with that reported earlier for the alkali metals vapors.

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Citation Download Citation

S. Stepanov, N. Casillas, M. Ocegueda, J. Diaz, and E. Hernandez "Nonlinear optical effects in the acetylene filled microstructured fibers with Maxwell distribution of relaxation rates", Proc. SPIE 11296, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II, 1129620 (25 February 2020); https://doi.org/10.1117/12.2545814

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