论文信息 - Tunable WDM dispersion compensation with fixed bandwidth and fixed passband center wavelength using a uniform FBG

Tunable WDM dispersion compensation with fixed bandwidth and fixed passband center wavelength using a uniform FBG

We report an fiber Bragg grating-based tunable dispersion compensator with fixed bandwidth and fixed passband center wavelength for wavelength-division-multiplexing (WDM) channels. Chirping of the grating is achieved by bending a cantilever, and the tunability is realized by controlling the length of the induced chirping within a longer uniform grating. Due to the fixed center wavelength and bandwidth, crosstalk from adjacent wavelength bands is minimized and a single passband can potentially accommodate several WDM channels. We demonstrate tunable dispersion compensation up to 1500 ps/nm with a 10-cm uniform grating. Moreover, both negative and positive 400-ps/nm values are achieved in a single device with 2-nm bandwidth.

[1] F. Bilodeau,et al. DISPERSION VARIABLE FIBRE BRAGG GRATING USING A PIEZOELECTRIC STACK , 1996 .

[2] Richard Edward Epworth,et al. Adjustable dispersion equaliser for 10 and 20 Gbit/s over distances up to 160 km , 1994 .

[3] T. Imai,et al. Dispersion tuning of a linearly chirped fiber Bragg grating without a center wavelength shift by applying a strain gradient , 1998, IEEE Photonics Technology Letters.

[4] V. Grubsky,et al. Simultaneous tunable dispersion compensation of many WDM channels using a sampled nonlinearly chirped fiber Bragg grating , 1999, IEEE Photonics Technology Letters.

[5] John A. Rogers,et al. Dispersion compensation in 20 Gbit/s dynamic nonlinear lightwave systems using electrically tunable chirped fibre grating , 1999 .

[6] T. Sugihara,et al. Tunable dispersion equalizer with a divided thin film heater , 2001, OFC 2001. Optical Fiber Communication Conference and Exhibit. Technical Digest Postconference Edition (IEEE Cat. 01CH37171).