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arXiv 1407.3052astro-ph.IM
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红外光谱仪用ZBLAN纤维的表征和性能的初步研究

Preliminary results on the characterization and performances of ZBLAN fiber for infrared spectrographs

M. Iuzzolino, A. Tozzi, N. Sanna, L. Zangrilli, E. Oliva

摘要:

目前的望远镜和未来的超大型望远镜使用光纤光谱仪来观察光学和红外波长。光纤的使用大大简化了摄谱仪与望远镜的接口。在高光谱分辨率(R> 50,000)下,光纤可用于实现非常高的光谱精度。GIANO是一个红外(0.95-2.5μm)高分辨率(R= 50,000)光谱仪[1] [2] [3],最近在TNG望远镜(La Palma)上投入使用。该仪器的设计和建造是为了从望远镜直接馈电[4]。然而,由于在预调试阶段对望远镜接口施加的限制,它必须位于旋转建筑物上,远离望远镜焦点。为此,研制了一种基于85 μm纤芯ZBLAN红外传输光纤的新型望远镜接口。在这篇文章中,我们报告的第一个,初步结果的影响,这些纤维的质量记录光谱与GIANO和一个类似的摄谱仪,我们在实验室设置。这些影响主要与模式噪声(MN)有关,在GIANO中,由于波长更长,因此比光学光谱仪更明显。

英文摘要:

Present telescopes and future extremely large telescopes make use of fiber-fed spectrographs to observe at optical and infrared wavelengths. The use of fibers largely simplifies the interfacing of the spectrograph to the telescope. At a high spectral resolution (R>50,000) the fibers can be used to achieve very high spectral accuracy. GIANO is an infrared (0.95-2.5μm) high resolution (R=50,000) spectrometer[1] [2] [3] that was recently commissioned at the TNG telescope (La Palma). This instrument was designed and built for direct feeding from the telescope [4]. However, due to constraints imposed on the telescope interfacing during the pre-commissioning phase, it had to be positioned on the rotating building, far from the telescope focus. Therefore, a new interface to the telescope, based on IR-transmitting ZBLAN fibers with 85 μm core, was developed. In this article we report the first, preliminary results of the effects of these fibers on the quality of the recorded spectra with GIANO and with a similar spectrograph that we set-up in the laboratory. The effects can be primarily associated to modal-noise (MN) that, in GIANO, is much more evident than in optical spectrometers, because of the much longer wavelengths.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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