Abstract

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

Modal coupling in surface-corrugated long-period-grating fiber tapers

W. Ding and S. R. Andrews
Opt. Lett. 33(7) 717-719 (2008)

Modal coupling in fiber tapers decorated with metallic surface gratings

W. Ding, S. R. Andrews, T. A. Birks, and S. A. Maier
Opt. Lett. 31(17) 2556-2558 (2006)

Fiber Bragg gratings with various chirp profiles made in etched tapers

J. L. Cruz, L. Dong, S. Barcelos, and L. Reekie
Appl. Opt. 35(34) 6781-6787 (1996)

Single-mode Bragg gratings in tapered few-mode and multimode fibers

L. A. Herrera-Piad, M. Delgado-Pinar, J. L. Cruz, A. Carrascosa, A. Díez, R. Rojas-Laguna, and M. V. Andrés
Opt. Lett. 44(16) 4024-4027 (2019)

Corrugated metal-coated tapered tip for scanning near-field optical microscope

Tomasz J. Antosiewicz and Tomasz Szoplik
Opt. Express 15(17) 10920-10928 (2007)