Mode expansion theory and application in step-index multimode fibers for astronomical spectroscopy

被引：6

作者：

Hernandez, E. ^{[1
]}

Roth, M. M. ^{[1
]}

Petermann, K. ^{[2
]}

Kelz, A. ^{[1
]}

Moralejo, B. ^{[1
]}

Madhav, K. ^{[1
]}

机构：

[1] Leibniz Inst Astrophys Potsdam AIP, Stemwarte 16, D-14482 Potsdam, Germany

[2] Tech Univ Berlin, HFT4,Einsteinufer 25, D-10587 Berlin, Germany

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2021年 / 38卷 / 07期

关键词：

HIGH-RESOLUTION SPECTROGRAPH; FOCAL RATIO DEGRADATION; OPTICAL-FIBERS; POWER DISTRIBUTIONS; VOIGT FUNCTION; NOISE; APPROXIMATION; PMAS;

D O I：

10.1364/JOSAB.423866

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In astronomical spectroscopy, optical fibers are abundantly used for multiplexing and decoupling the spectrograph from the telescope to provide stability in a controlled environment. However, fibers are less than perfect optical components and introduce complex effects that diminish the overall throughput, efficiency, and stability of the instrument. We present a novel numerical field propagation model that emulates the effects of modal noise, scrambling, and focal ratio degradation with a rigorous treatment of wave optics. We demonstrate that the simulation of the near- and far-field output of a fiber, injected into a ray-tracing model of the spectrograph, allows us to assess performance at the detector level. (C) 2021 Optical Society of America

引用

页码：A36 / A50

页数：15