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Demonstration of an etched cladding fiber Bragg grating filter with reduced tuning force requirement

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2 Author(s)
Lyons, E.R. ; Raytheon Syst. Co., El Segundo, CA, USA ; Lee, H.P.

A novel tunable fiber Bragg grating (FBG) filter with a chemically etched cladding has been demonstrated. By reducing the cladding diameter of a FBG through etching with HF, the tension tuning force can be lowered by over an order of magnitude. Wavelength tuning up to a failure point of 21.2 nm has been demonstrated along with repeated cycling over a 9 nm tuning range. Observations of increased coupling to resonant cladding modes in the etched FBG's are also noted.

Published in:

Photonics Technology Letters, IEEE  (Volume:11 ,  Issue: 12 )