Transmission Spectrum Characteristics for a Single-Mode-Multimode-Single-Mode Fiber Filter
Authors:
- 20 August 2014
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 26 (21) , 2185-2188
Abstract
We designed and demonstrated a single-mode-multimode-single-mode fiber filter using a step-indexed large-mode-area fiber, which has a critical wavelength at 1046 nm. A broad transmission peak or trough at 1046 nm is very sensitive to strain or temperature variation. The interference fringes on either side of the critical wavelength show blue or red shift, respectively, when the filter is subjected to strain and temperature changes. We simulated the transmission spectrum based on the interference of two modes, LP 01 and LP 02 , and their propagation constant difference. The simulated spectrum matches reasonably well with the experimental spectrum. The filter can be used as a variable output coupler or for fiber optic sensors.Keywords
Funding Information
- Natural Sciences and Engineering Research Council of Canada
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