高达 3 THz 的布里渊激光驱动太赫兹振荡器,具有飞秒级定时抖动

IF 32.3 1区 物理与天体物理 Q1 OPTICS
Brendan M. Heffernan, James Greenberg, Takashi Hori, Tatsuya Tanigawa, Antoine Rolland
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引用次数: 0

摘要

太赫兹(THz)频率范围从 0.1 太赫兹到 10.0 太赫兹,是一个创新成熟的领域,在无线通信和分子光谱学等领域具有巨大的发展潜力。我们的工作介绍了一种双波长激光器设计,它利用光纤腔中的受激布里渊散射,有效地产生两个高度相干的斯托克斯光波,并固有地降低了差分相位噪声。为确保稳健运行,斯托克斯波以光学方式注入各自的泵浦激光器,从而大大提高了相干性。两个波长之间的频率差通过单路载流子光电二极管转换为太赫兹波。这种创新设计有助于产生相位噪声小于 -100 dBc Hz-1 的太赫兹波,在 10 kHz 傅立叶频率下,其时序噪声小于 10 as Hz-1/2,载波频率范围从 300 GHz 到 3 THz。在降低相位噪声方面取得的这一进展为可调谐太赫兹源的光谱纯度确立了新的基准。这种进步对于超越振荡器限制的应用至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Brillouin laser-driven terahertz oscillator up to 3 THz with femtosecond-level timing jitter

Brillouin laser-driven terahertz oscillator up to 3 THz with femtosecond-level timing jitter

The terahertz (THz) frequency range, spanning from 0.1 to 10.0 THz, is a field ripe for innovation with vast, developing potential in areas like wireless communication and molecular spectroscopy. Our work introduces a dual-wavelength laser design that utilizes stimulated Brillouin scattering in an optical fibre cavity to effectively generate two highly coherent optical Stokes waves with inherently mitigated differential phase noise. To guarantee robust operation, the Stokes waves are optically injected into their respective pump lasers, which also serves to greatly improve the resulting coherence. The frequency difference between the two wavelengths is converted into THz waves through a uni-travelling-carrier photodiode. This innovative design facilitates the generation of THz waves with phase noise levels of less than –100 dBc Hz–1, translating to timing noise below 10 as Hz–1/2 at 10 kHz Fourier frequency, over a carrier frequency range from 300 GHz to 3 THz. This development in phase noise reduction establishes a new benchmark in the spectral purity of tunable THz sources. Such advances are pivotal for applications to move beyond oscillator constraints.

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来源期刊
Nature Photonics
Nature Photonics 物理-光学
CiteScore
54.20
自引率
1.70%
发文量
158
审稿时长
12 months
期刊介绍: Nature Photonics is a monthly journal dedicated to the scientific study and application of light, known as Photonics. It publishes top-quality, peer-reviewed research across all areas of light generation, manipulation, and detection. The journal encompasses research into the fundamental properties of light and its interactions with matter, as well as the latest developments in optoelectronic devices and emerging photonics applications. Topics covered include lasers, LEDs, imaging, detectors, optoelectronic devices, quantum optics, biophotonics, optical data storage, spectroscopy, fiber optics, solar energy, displays, terahertz technology, nonlinear optics, plasmonics, nanophotonics, and X-rays. In addition to research papers and review articles summarizing scientific findings in optoelectronics, Nature Photonics also features News and Views pieces and research highlights. It uniquely includes articles on the business aspects of the industry, such as technology commercialization and market analysis, offering a comprehensive perspective on the field.
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