An experimental demonstration of coherent combining applied to optical parametric oscillators

R. Chtouki; P. Bourdon; A. Durécu; L. Lombard; C. Planchat; M. Raybaut; A. Godard

doi:10.1117/12.2546022

2 March 2020 An experimental demonstration of coherent combining applied to optical parametric oscillators

R. Chtouki, P. Bourdon, A. Durécu, L. Lombard, C. Planchat, M. Raybaut, A. Godard

Proceedings Volume 11264, Nonlinear Frequency Generation and Conversion: Materials and Devices XIX; 112641B (2020) https://doi.org/10.1117/12.2546022
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

Coherent beam combining (CBC) by active phase control could be useful for power scaling fiber-laser-pumped optical frequency converters like optical parametric oscillators (OPOs). We developed an indirect phase control approach based on the phase matching relation intrinsic to efficient nonlinear processes. Previously, we demonstrated coherent combining of difference frequency generation through real time active control of the phases of the pump waves, using high bandwidth fibered electro-optic phase modulators. The straightforward follow-up is the application of such process to OPOs, higher efficiency frequency converters when compared to DFGs. In this paper, we present an experimental demonstration of coherent OPOs emitting tunable idler wave in the mid-infrared. We present the architectures of continuous wave OPOs we are working on, their pros and cons and threshold properties, and the first results of coherent combining. We detail how the cavity modes of the OPOs are overlapped and how the active phase control used for DFG combining can be implemented in this case.

Citation Download Citation

R. Chtouki, P. Bourdon, A. Durécu, L. Lombard, C. Planchat, M. Raybaut, and A. Godard "An experimental demonstration of coherent combining applied to optical parametric oscillators", Proc. SPIE 11264, Nonlinear Frequency Generation and Conversion: Materials and Devices XIX, 112641B (2 March 2020); https://doi.org/10.1117/12.2546022

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