芯片上的超宽带毫瓦级谐振倍频。

IF 15.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Marco Clementi, Luca Zatti, Ji Zhou, Marco Liscidini, Camille-Sophie Brès
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引用次数: 0

摘要

微谐振器是提高二阶非线性光学过程效率的有力工具,如二次谐波的产生,它可以相干地桥接倍频间隔光谱带。然而,相位匹配和双谐振条件等色散约束迄今为止限制了窄带操作的演示。在这项工作中,我们克服了这些限制,在一种新型集成器件中展示了超宽带谐振频率加倍,其中泵浦和二次谐波的谐振增强在两个不同的线性不耦合微环谐振器中单独处理,每个谐振器都调整到各自的频谱带。这两个微谐振器是独立设计和调谐的,但共享一个共同的相互作用区域,在超过200 nm的准相位匹配带宽上实现非线性耦合,这是通过光诱导χ(2)光栅的铭文实现的。该系统不仅可以方便地解开两个微谐振器的设计参数,而且可以在电上重新配置双谐振条件,在光学上重新配置相位匹配条件。我们演示了毫瓦级可寻址二次谐波在整个电信频段的产生,然后配置该设备内部产生和上转换克尔频率梳,带宽超过100纳米,上转换功率高达10兆瓦。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Ultrabroadband milliwatt-level resonant frequency doubling on a chip.

Ultrabroadband milliwatt-level resonant frequency doubling on a chip.

Microresonators are powerful tools to enhance the efficiency of second-order nonlinear optical processes, such as second-harmonic generation, which can coherently bridge octave-spaced spectral bands. However, dispersion constraints such as phase-matching and doubly resonant conditions have so far limited demonstrations to narrowband operation. In this work, we overcome these limitations showing ultrabroadband resonant frequency doubling in a novel integrated device, wherein the resonant enhancement of pump and second harmonic are individually addressed in two distinct and linearly uncoupled microring resonators, each adjusted to target the respective spectral band. The two microresonators are designed and tuned independently, yet share a common interaction region that grants nonlinear coupling over a quasi-phase-matching bandwidth exceeding 200 nm, enabled by the inscription of a photoinduced χ(2) grating. The system allows to not only conveniently disentangle the design parameters of the two microresonators but also to reconfigure the doubly resonant condition electrically, and the phase-matching condition optically. We demonstrate milliwatt-level addressable second-harmonic generation over the entire telecom band and then configure the device to internally generate and upconvert a Kerr frequency comb with bandwidth exceeding 100 nm and upconverted power up to 10 mW.

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来源期刊
Nature Communications
Nature Communications Biological Science Disciplines-
CiteScore
24.90
自引率
2.40%
发文量
6928
审稿时长
3.7 months
期刊介绍: Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.
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