Experimental measurements of AO-Fed photonic lantern coupling efficiencies
Experimental measurements of AO-Fed photonic lantern coupling efficiencies
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AO-Fed 光子灯笼耦合效率的实验测量
DOI：
10.1117/12.2630608
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Leon-Saval, Sergio G.
中科院分区：
文献类型：
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作者：
Lin, Jonathan;Vievard, Sébastien B.;Jovanovic, Nemanja;Norris, Barnaby R.;Fitzgerald, Michael P.;Betters, Christopher H.;Gatkine, Pradip R.;Guyon, Olivier;Kim, Yoo Jung;Leon-Saval, Sergio G.
有效地将来自大型望远镜的光与光子设备耦合是一项挑战。然而，克服这一挑战将使衍射有限的仪器成为可能，这将提供显著的小型化和热机械稳定性方面的优势。通过将光子灯与高性能自适应光学系统耦合，我们最近通过模拟证明了高通量衍射限制仪器是可能的（Lin等人，Applied optics, 2021）。在这里，我们建立在这项工作的基础上，并提出了近红外验证实验的初步结果，以证实实验室中的模拟。我们的实验是用一个19端口的光子灯连接到斯巴鲁望远镜上最先进的SCExAO仪器进行的。SCExAO仪器允许我们改变灯注入的对准和焦比，以及光束中的Strehl比和尖端/倾斜抖动量。在这项工作中，我们提出了针对上述参数的实验表征，以便与先前的模拟进行比较，并阐明灯笼馈送光谱仪的最佳结构。
Efficiently coupling light from large telescopes to photonic devices is challenging. However, overcoming this challenge would enable diffraction-limited instruments, which offer significant miniaturization and advantages in thermo-mechanical stability. By coupling photonic lanterns with high performance adaptive optics systems, we recently demonstrated through simulation that high throughput diffraction-limited instruments are possible (Lin et al., Applied Optics, 2021). Here we build on that work and present initial results from validation experiments in the near-infrared to corroborate those simulations in the laboratory. Our experiments are conducted using a 19-port photonic lantern coupled to the state-of-the-art SCExAO instrument at the Subaru Telescope. The SCExAO instrument allows us to vary the alignment and focal ratio of the lantern injection, as well as the Strehl ratio and amount of tip/tilt jitter in the beam. In this work, we present experimental characterizations against the aforementioned parameters, in order to compare with previous simulations and elucidate optimal architectures for lantern-fed spectrographs.