Nonlinear beam conversion with multi-spectral components
K.-H. Chang2,3, C.-C. Fan2, T.-F. Pan2,6, J.-H. Lai2, M.-S. Tsai2, A. Boudrioua3, C.-M. Lai4, H. Yokoyama5, E. Higurashi5, H. Akiyama6, K. Paschke7, and L.-H. Peng1,2
Published in:
Opt. Lett., vol. 50, no. 4, pp. 1313-1316 (2025).
Abstract:
We characterized the intra-cavity mode patterns due to the concurrence of dual-optical parametric oscillations (OPOs) followed by second-harmonic generation (SHG) and sumfrequency generation (SFG) within a gain-modulated quasiphase-matching nonlinear photonic crystal (QPM-NPC). The proposed device contains a bi-grating QPM period for down-conversion, followed by mono- or tri-grating QPM periods for up-conversion on periodically poled lithium tantalate. The pairs of infrared dual-OPO beams are found to spatially reside at the opposite side-lobes of the cavity mode, each exhibiting distinct spectral contents corresponding to the pair of (signal, idler) waves oscillating at (979, 1167) nm and (964, 1189) nm, respectively. The QPM-SHG waves at 582 and 593nm are found to overlap with their respective OPO counterparts in the side-lobes, whereas the QPM-SFG at 588nm wavelength is located at the center. Such spatial-spectral configurability reveals a subtle spatial overlap in the dual-OPO idlers due to wave continuity in the gain-modulated NPC, which agrees with our model calculation.
1 Department of Electrical Engineering, National Taiwan University, Taipei 106, Taiwan
2 Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 106, Taiwan
3 Laboratoire de Physique de Lasers CNRS UMR 7538, Université Sorbonne Paris Nord, Villetaneuse 93430, France
4 Electronic and Optoelectronic System Research Laboratories, Industrial Technology Research Institute, Hsinchu, 310401, Taiwan
5 Graduate School of Engineering, Tohoku University, Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan
6 The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
7 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Str. 4, 12489 Berlin, Germany
Related Topics:
Nonlinear Optics
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