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Novel ultra-narrowband transmission tunable optical fiber filter technique based on cascading nonlinear chirped fiber gratings

YU SU1,2,* , JIANHUA REN1, TONGGANG ZHAO1, SHUQUN SHEN1, WEI WU2

Affiliation

  1. School of Electronic Engineering, Beijing University of Posts and Telecommunications, 100876 Beijing, China
  2. Key Laboratory of Photoelectronic Devices and Detection Technology, Liaoning University, Liaoning Province, 110036 Shenyang, China

Abstract

A transmission fiber filter that can provide ultra-narrow transmission bandwidth and flexible tunable abilities is proposed based on cascading two nonlinear chirped fiber gratings, whose reflection spectra have apparent asymmetric shapes. The spectrum envelope slope parameter is defined to describe the spectrum asymmetry, and then, the relationship between the parameter and the filtering ability is analyzed. The expected filter performances, such as the working wavelength, transmission band width and tunable range are discussed as well..

Keywords

Chirped fiber grating, Narrow band width, Transmission spectrum, Tunable fiber filter.

Citation

YU SU, JIANHUA REN, TONGGANG ZHAO, SHUQUN SHEN, WEI WU, Novel ultra-narrowband transmission tunable optical fiber filter technique based on cascading nonlinear chirped fiber gratings, Optoelectronics and Advanced Materials - Rapid Communications, 6, 3-4, March-April 2012, pp.363-365 (2012).

Submitted at: Jan. 12, 2012

Accepted at: April 11, 2012