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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


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.

Original languageEnglish
Title of host publicationAdvances in Stellar Interferometry
StatePublished - 2006
EventAdvances in Stellar Interferometry - Orlando, FL, United States
Duration: 25 May 200630 May 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6268 II
ISSN (Print)0277-786X


ConferenceAdvances in Stellar Interferometry
Country/TerritoryUnited States
CityOrlando, FL


  • Infrared fiber
  • Single mode
  • Testing


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