754
2021-04-05
Simultaneous Generation of Orthogonally Polarized Signals in an Optical Parametric Oscillator Based on Periodically Poled Lithium Niobate
CH. S. S. Pavan Kumar, Byoung Joo Kim, Deok Woo Kim, and Myoungsik Cha*
Department of Physics, Pusan National University, Busan 46241, Korea
Current Optics and Photonics Vol. 4 No. 1 (2020 February) pp. 63-68
DOI: https://doi.org/10.3807/COPP.2020.4.1.063
Fig. 1 Schematic diagram of experimental setup for OPO. L: Focusing lens, M1 and M2: Cavity mirrors, F: Filters, P: Polarizer.
Abstract
We built an optical parametric oscillator (OPO) generating orthogonally polarized signals at different wavelengths simultaneously, based on a periodically poled lithium niobate (PPLN) crystal. The OPO was pumped by ns-pulses at 1.064 µm from a diode-pumped solid-state laser, where we found the type-0 and the type-1 quasi-phase matching conditions were satisfied simultaneously in the PPLN crystal. This enabled us to create a coherent light source which can emit dual signals which could be accessed easily by rotating a polarizer.
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