用于斯巴鲁望远镜红外多普勒仪器的激光频率梳系统

IF 1.7 3区 工程技术 Q2 ENGINEERING, AEROSPACE
Takuma Serizawa, Takashi Kurokawa, Yosuke Tanaka, Jun Nishikawa, Takayuki Kotani, Motohide Tamura
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引用次数: 0

摘要

在 "斯巴鲁战略计划 "框架内,2019年2月开始利用近红外多普勒(IRD)仪器进行系外行星巡天,重点是M型矮星的中晚期。由于中晚期M型矮星在红外区域比可见光区域更亮,因此开发了一个激光频率梳(LFC)系统作为波长参考,覆盖970到1750纳米的近红外区域。为了稳定光谱仪上的梳状图像,使用高非线性光纤生成的原始 12.5 GHz 梳状图像在经过光学处理(包括光谱整形、去极化和模式扰乱)后被注入光谱仪。为实现光学处理器的任何光学系统配置,还引入了内嵌式光纤模块。LFC 系统中的这种光纤配置实现了长期稳定性和易维修性。此外,使用交互式程序对 LFC 系统进行简单的远程控制,就能在大约 5 分钟内生成 LFC(不包括预热时间)。使用 IRD 仪器进行的长达 4 年的观测证明,我们的 LFC 系统是实用和稳定的。在此期间,LFC 系统运行稳定,没有出现重大问题,有助于保持较高的径向速度精度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Laser frequency comb system for the infrared Doppler instrument on the Subaru Telescope
An exoplanet survey with a near-infrared Doppler (IRD) instrument focused on mid-to-late M-type dwarfs began in February 2019 within the framework of the Subaru Strategic Program. Because mid-to-late M-type dwarfs are brighter in the infrared region than in the visible region, a laser frequency comb (LFC) system was developed as a wavelength reference, covering the near-infrared region from 970 to 1750 nm. To stabilize the comb image on the spectrometer, the original 12.5 GHz comb generated using highly nonlinear fibers was injected into the spectrometer after optical processing, including spectral shaping, depolarization, and mode scrambling. An inline fiber module was introduced to enable any optical system configuration for the optical processor. This fiber-optic configuration in the LFC system allows for long-term stability and easy repair. Moreover, simple remote control of the LFC system using an interactive program enabled LFC generation in approximately 5 min, excluding warm-up time. The observations using the IRD instrument over 4 years have proven that our LFC system is practical and stable. The LFC system operated stably without major problems during this period, helping to maintain a high radial velocity accuracy.
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来源期刊
CiteScore
4.40
自引率
13.00%
发文量
119
期刊介绍: The Journal of Astronomical Telescopes, Instruments, and Systems publishes peer-reviewed papers reporting on original research in the development, testing, and application of telescopes, instrumentation, techniques, and systems for ground- and space-based astronomy.
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