频率梳
非线性光学
材料科学
谐振器
和频产生
低语长廊波浪
四波混频
二次谐波产生
光电子学
折射率
作者
Yun Zhao,Jae K. Jang,Yoshitomo Okawachi,Alexander L. Gaeta
出处
期刊:Optics Letters
[The Optical Society]
日期:2021-11-01
卷期号:46 (21): 5393-5396
被引量:2
摘要
Microresonator-based platforms with ${\chi ^{(2)}}$ nonlinearities have the potential to perform frequency conversion at high efficiencies and ultralow powers with small footprints. The standard doctrine for achieving high conversion efficiency in cavity-based devices requires “perfect matching,” that is, zero phase mismatch while all relevant frequencies are precisely at a cavity resonance, which is difficult to achieve in integrated platforms due to fabrication errors and limited tunabilities. In this Letter, we show that the violation of perfect matching does not necessitate a reduction in conversion efficiency. On the contrary, in many cases, mismatches should be intentionally introduced to improve the efficiency or tunability of conversion. We identify the universal conditions for maximizing the efficiency of cavity-based frequency conversion and show a straightforward approach to fully compensate for parasitic processes such as thermorefractive and photorefractive effects that, typically, can limit the conversion efficiency. We also show the design criteria that make these high-efficiency states stable against nonlinearity-induced instabilities.
科研通智能强力驱动
Strongly Powered by AbleSci AI