集成在铌酸锂薄膜平台上的宽调谐 Ka 波段光电振荡器

IF 5.4 1区物理与天体物理 Q1 OPTICS

APL Photonics Pub Date : 2024-09-06 DOI:10.1063/5.0214107

Rui Ma, Zijun Huang, Wei Ke, Xichen Wang, Peng Hao, X. Steve Yao, Xinlun Cai

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引用次数: 0

摘要

我们报告了一种新型的宽调谐 Ka 波段光电振荡器（OEO），它是通过在铌酸锂薄膜平台上集成一个马赫-泽恩德调制器（MZM）、一个热调谐增滴微环谐振器（MRR）和一个马赫-泽恩德干涉仪（MZI）而实现的，其中马赫-泽恩德调制器和增滴微环谐振器依次位于 MZI 的一个臂上。MZM 用于对光载波进行调制，而加降 MRR 则用于从 MZI 的另一个臂中选择一个调制边带，与未调制的光载波一起跳动，这样 OEO 的振荡频率就由光载波与所选调制边带之间的频率间隔决定，而频率调谐范围则由 MRR 的自由光谱范围决定。通过调节滴加 MRR 的谐振，振荡频率可在 20 至 35 GHz 之间调节，整个调节范围内的相位噪声分别为 -85 dBc/Hz @ 10 kHz 和 -116 dBc/Hz @ 100 kHz，与之前报道的使用其他材料平台实现的光子集成 OEO 相比，振荡频率更高，频率调节范围更广，相位噪声更低。

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Widely tunable Ka-band optoelectronic oscillator integrated on thin film lithium niobate platform

We report a novel widely tunable Ka-band optoelectronic oscillator (OEO) realized by integrating a Mach–Zehnder modulator (MZM), a thermally-tunable add-drop micro-ring resonator (MRR), and a Mach–Zehnder interferometer (MZI) on the thin film lithium niobate platform, with the MZM and the MRR sequentially situated in one of the MZI arms. The MZM is for modulating the optical carrier, while the add-drop MRR is for selecting a single modulation sideband to beat with the unmodulated optical carrier from the other arm of the MZI, such that the OEO oscillation frequency is determined by the frequency spacing between the optical carrier and the selected modulation sideband, while the frequency tuning range is determined by the free spectral range of the MRR. By tuning the resonances of the add-drop MRR, the oscillation frequency can be tuned from 20 to 35 GHz, with the phase noises of −85 dBc/Hz @10 kHz and −116 dBc/Hz @100 kHz in the whole tuning range, which represent much higher oscillation frequency, much wider frequency tuning range, and lower phase noise than those of the photonic integrated OEOs realized with other material platforms reported previously.

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来源期刊

APL Photonics Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

10.30

自引率

3.60%

发文量

107

审稿时长

19 weeks

期刊介绍： APL Photonics is the new dedicated home for open access multidisciplinary research from and for the photonics community. The journal publishes fundamental and applied results that significantly advance the knowledge in photonics across physics, chemistry, biology and materials science.