Measurement of spatial filtering capabilities of single mode infrared fibers

A. Ksendzov; E. Bloemhof; V. White; J. K. Wallace; R. O. Gappinger; J. S. Sanghera; L. E. Busse; W. J. Kim; P. C. Pureza; V. Q. Nguyen; I. D. Aggarwal; S. Shalem; A. Katzir

doi:10.1117/12.673388

28 June 2006 Measurement of spatial filtering capabilities of single mode infrared fibers

A. Ksendzov, E. Bloemhof, V. White, J. K. Wallace, R. O. Gappinger, J. S. Sanghera, L. E. Busse, W. J. Kim, P. C. Pureza, V. Q. Nguyen, I. D. Aggarwal, S. Shalem, A. Katzir

Author Affiliations +

Proceedings Volume 6268, Advances in Stellar Interferometry; 626838 (2006) https://doi.org/10.1117/12.673388
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

Spatial filtering is necessary to achieve deep nulls in optical interferometer and single mode infrared fibers can serve as spatial filters. The filtering function is based on the ability of these devices to perform the mode-cleaning function: only the component of the input field that is coupled to the single bound (fundamental) mode of the device propagates to the output without substantial loss. In practical fiber devices, there are leakage channels that cause light not coupled into the fundamental mode to propagate to the output. These include propagation through the fiber cladding and by means of a leaky mode. We propose a technique for measuring the magnitude of this leakage and apply it to infrared fibers made at the Naval Research Laboratory and at Tel Aviv University. All measurements are performed at 10.5 μm wavelength.

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A. Ksendzov, E. Bloemhof, V. White, J. K. Wallace, R. O. Gappinger, J. S. Sanghera, L. E. Busse, W. J. Kim, P. C. Pureza, V. Q. Nguyen, I. D. Aggarwal, S. Shalem, and A. Katzir "Measurement of spatial filtering capabilities of single mode infrared fibers", Proc. SPIE 6268, Advances in Stellar Interferometry, 626838 (28 June 2006); https://doi.org/10.1117/12.673388

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