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Design and fabrication of a coherent array of single-mode optical fibers for the nulling coronagraph

Design and fabrication of a coherent array of single-mode optical fibers for the nulling coronagraph

Liu, Duncan T.; Levine, Martin B.; Shao, Mike
URI: http://hdl.handle.net/2014/39034
Date: 2003-08-06
Keywords: spatial filter; nulling interferometer; coherent fiber array; micro-lens array; step-index single-mode fiber; photonic crystal fiber; Zygo interferometer; coronagraph
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2003.
Citation: SPIE Annual Meeting, Techniques and Instrumentation for Detection of Exo-Planets, San Diego, California, August 06, 2003.

Abstract:

We present the development of a single-mode spatial filter array for the nulling coronagraph application. The development consists of two generations of fiber array designs and a Zygo-interferometer based lens array to fiber array alignment methodology. We discuss the use of large mode field diameter (MFD) fibers to relax fiber placement tolerance of the fiber array. The pros and cons of using the Photonic Crystal Fiber (PCF) for building the array are discussed. The future plan for implementing a 1000-channel class, single-mode spatial filter array is described.

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