Selective Coupling Enhances Harmonic Generation of Whispering-Gallery Modes

被引：14

作者：

Trainor, Luke S. ^{[1
]}

Sedlmeir, Florian ^{[1
,2
]}

Peuntinger, Christian ^{[1
]}

Schwefel, Harald G. L. ^{[1
]}

机构：

[1] Univ Otago, Dodd Walls Ctr Photon & Quantum Technol, Dept Phys, 730 Cumberland St, Dunedin 9016, New Zealand

[2] Max Planck Inst Sci Light, Staudtstr 2, D-90158 Erlangen, Germany

来源：

PHYSICAL REVIEW APPLIED | 2018年 / 9卷 / 02期

关键词：

2ND-HARMONIC GENERATION; LITHIUM-NIOBATE; RESONATORS;

D O I：

10.1103/PhysRevApplied.9.024007

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate second-harmonic generation (SHG) in an x-cut congruent lithium niobate (LN) whispering-gallery mode (WGM) resonator. First, we show theoretically that independent control of the coupling of the pump and signal modes is optimal for high conversion rates. A coupling scheme based on our earlier work [F. Sedlmeir et al., Phys. Rev. Applied 7, 024029 (2017)] is then implemented experimentally to verify this improvement. Thereby, we are able to improve on the efficiency of SHG by more than an order of magnitude by selectively outcoupling using a LN prism, utilizing the birefringence of it and the resonator in kind. This method is also applicable to other nonlinear processes in WGM resonators.

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页数：6

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