Ultra-broadband spontaneous parametric downconversion in periodically poled lithium niobate and electro-optic tuning of the optical parametric oscillation

CH. S. S. Pavan Kumar; Byoung Joo Kim; Deok Woo Kim; Myoungsik Cha; In Ho Bae; Kee Suk Hong; Dong Hoon Lee

doi:10.1117/12.2545420

2 March 2020 Ultra-broadband spontaneous parametric downconversion in periodically poled lithium niobate and electro-optic tuning of the optical parametric oscillation

CH. S. S. Pavan Kumar, Byoung Joo Kim, Deok Woo Kim, Myoungsik Cha, In Ho Bae, Kee Suk Hong, Dong Hoon Lee

Author Affiliations +

Proceedings Volume 11264, Nonlinear Frequency Generation and Conversion: Materials and Devices XIX; 112640E (2020) https://doi.org/10.1117/12.2545420
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

We demonstrated an electro-optically tunable ultra-broadband singly resonant ns-optical parametric oscillator (OPO) based on a periodically poled lithium niobate crystal (PPLN) with a three-segment structure. The ultra-broadband parametric gain was obtained by precise selection of the pump wavelength and the poling period to match the group velocities of the signal and idler. Selected wavelengths in the broadband parametric signal and idler gain spectrum generated by the first segment was amplified in the third segment. This selection could be electro-optically controlled by applying a variable dc electric field in the middle single-domain segment. A singly resonant OPO cavity was then constructed and the output signal wavelength could be tuned from 1.373 to 1.749 μm (corresponding idler tuning range from 2.863 to 1.972 μm) by changing the electric field from -6.5 to +5.0 kV/mm. Electro-optic tuning facilitated fast wavelength switching for the OPO to span the entire near-infrared spectral region. This is the largest electro-optic tuning range observed to our knowledge.

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CH. S. S. Pavan Kumar, Byoung Joo Kim, Deok Woo Kim, Myoungsik Cha, In Ho Bae, Kee Suk Hong, and Dong Hoon Lee "Ultra-broadband spontaneous parametric downconversion in periodically poled lithium niobate and electro-optic tuning of the optical parametric oscillation", Proc. SPIE 11264, Nonlinear Frequency Generation and Conversion: Materials and Devices XIX, 112640E (2 March 2020); https://doi.org/10.1117/12.2545420

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