Versatile tuning of Kerr soliton microcombs in crystalline microresonators
Versatile tuning of Kerr soliton microcombs in crystalline microresonators
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DOI：
10.1038/s42005-022-01118-4
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发表时间：
2023-01-10
影响因子：
5.5
通讯作者：
Tanabe, Takasumi
中科院分区：
文献类型：
--
作者：
Fujii, Shun;Wada, Koshiro;Tanabe, Takasumi
从高品质因数微谐振器（也称为微梳）发射的基于微谐振器的光学频率梳为光学频率梳技术的领域（包括频率计量、精密传感和光学通信）开辟了新的视野。为了扩展微梳的这种应用的能力，大的和可靠的可调谐性是至关重要的。在这里，我们展示了宽光谱调谐克尔孤子微梳在一个热控制的晶体微谐振器与泵失谐稳定。构成频率梳的基本元件，即中心频率、重复频率和载波包络偏移频率，分别通过高达-48.8 GHz、-5.85 MHz和-386 MHz进行频谱调谐，从而利用超高Q晶体氟化镁谐振器中的热效应。我们进一步证明了一个3.4倍的增强孤子梳功率从热膨胀与温度变化只有28 K通过采用定量分析的光纤到谐振器的耦合效率。
Microresonator-based optical frequency combs emitted from high-quality-factor microresonators, also known as microcombs, have opened up new horizons to areas of optical frequency comb technology including frequency metrology, precision sensing, and optical communication. To extend the capability of microcombs for such applications, large and reliable tunability is of critical importance. Here, we show broad spectral tuning of Kerr soliton microcombs in a thermally controlled crystalline microresonator with pump-detuning stabilization. The fundamental elements composing frequency combs, namely the center frequency, repetition frequency, and carrier-envelope offset frequency, are spectrally tuned by up to -48.8 GHz, -5.85 MHz, and -386 MHz, respectively, leveraging thermal effects in ultrahigh-Q crystalline magnesium fluoride resonators. We further demonstrate a 3.4-fold enhancement of soliton comb power resulting from thermal expansion with a temperature change of only 28 K by employing quantitative analyses of the fiber-to-resonator coupling efficiency.