New type of single-object optical fiber coupler

Zhao Peiqian; Junhua Pan; Shiyang Jiang; Shi-jie Yang

doi:10.1117/12.19138

1 July 1990 New type of single-object optical fiber coupler

Zhao Peiqian, Junhua Pan, Shiyang Jiang, Shi-jie Yang

Proceedings Volume 1235, Instrumentation in Astronomy VII; (1990) https://doi.org/10.1117/12.19138
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

In this paper, a new type of astronomical optical fiber coupler is described which couples the Cassegrain focus with f-ratio ff16 of the 6Ocm reflective telescope at Purple Mt.Observatory (P?) and the entrance slit of a prism spectrograph located :1n the lab under the observing floor. The single multi-mode, gradient index optical fiber has a length of about 25m, core diameter of 5Omicron, effective NA of 0.2. At both ends of the fiber, GRIN rod lenses with diameter of 1mm are used as f-ratio transverter. Techniques, e.g. the alegnment between fiber and GRIN rod lenses and guiding, are given in detail. Primary experimental observation with this coupler has been carried out and spectra of Lyr are obtained.

Citation Download Citation

Zhao Peiqian, Junhua Pan, Shiyang Jiang, and Shi-jie Yang "New type of single-object optical fiber coupler", Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); https://doi.org/10.1117/12.19138

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