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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 20 — Oct. 15, 2012
  • pp: 4314–4316

All-fiber noninterferometric narrow-transmission-bandpass filter

D. Sáez-Rodríguez, J. L. Cruz, A. Díez, and M. V. Andrés  »View Author Affiliations

Optics Letters, Vol. 37, Issue 20, pp. 4314-4316 (2012)

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In-fiber mode engineering based on the combination of Bragg and long-period gratings (LPGs) permits the implementation of noninterferometric transmission filters with narrow passbands using standard single-mode fiber. The design of the bandpass filter is based on the coupling between propagating and counterpropagating cladding modes in two fiber Bragg gratings. A LPG located between the Bragg gratings transfers power from the input fundamental mode to a specific cladding mode and recouples the filtered signal to the output fundamental mode. The filter produces a series of narrow passbands of about 30 pm linewidth with a maximum transmittance above 60%, 20 dB isolation, and passband separation of about 1 nm, each corresponding to the contribution of a different cladding mode.

© 2012 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2400) Fiber optics and optical communications : Fiber properties
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: June 6, 2012
Revised Manuscript: August 8, 2012
Manuscript Accepted: September 7, 2012
Published: October 12, 2012

D. Sáez-Rodríguez, J. L. Cruz, A. Díez, and M. V. Andrés, "All-fiber noninterferometric narrow-transmission-bandpass filter," Opt. Lett. 37, 4314-4316 (2012)

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