We describe a reflection-based fiber filter fabricated by plasma etching a surface corrugation Bragg grating on a tapered single-mode fiber. The taper waist with the grating forms the functional part of the filter, and the adiabatic taper transition removes unwanted higher-order modes. The spectral response is controlled by varying the taper diameter while maintaining a constant grating period. Reflection spectra have been investigated theoretically and experimentally and found to be in good agreement.
© 2007 Optical Society of America
Original Manuscript: March 26, 2007
Revised Manuscript: June 11, 2007
Manuscript Accepted: June 27, 2007
Published: August 16, 2007
W. Ding, S. R. Andrews, and S. A. Maier, "Surface corrugation Bragg gratings on optical fiber tapers created via plasma etch postprocessing," Opt. Lett. 32, 2499-2501 (2007)