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ABSTRACT: We propose and experimentally demonstrate a novel method for tunable dispersion slope compensation. We use two uniform fiber Bragg gratings (FBGs), a spatially designed S-bending stage and 4-port circulator. Two FBGs are mounted on each surface of a metal plate along the calculated quadratic curve. The dispersion slope (DS) can be tuned by adjusting a nonlinear strain along two uniform FBGs without changing second order dispersion as well as the central wavelength. In the experiment, a DS tuning range from -13.9 to -54.8 ps/nm(2) is achieved with the bandwidth of larger than 2.0 nm.
Optics Express 04/2009; 17(6):4336-41. · 3.59 Impact Factor
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ABSTRACT: We have evaluated the performance of strain-chirped fiber Bragg grating for the tunable dispersion compensation in a 40 Gb/s transmission link. Our compensator is well suited for the dispersion trimming in a high-speed transmission system.
Opto-Electronics and Communications Conference, 2008 and the 2008 Australian Conference on Optical Fibre Technology. OECC/ACOFT 2008. Joint conference of the; 08/2008
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ABSTRACT: We propose a semi-empirical model for the analysis of a temperature-tuned long-period fiber gratings (LPFG) filter. Applying the multi-port lattice model to LPFGs, meanwhile utilizing the empirically determined temperature-dependence of core-to-clad mode-coupling coefficients, we achieve a precise, practical means of the transmission spectrum analysis featuring an excellent fit with the experiment.
Lasers and Electro-Optics - Pacific Rim, 2007. CLEO/Pacific Rim 2007. Conference on; 09/2007
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ABSTRACT: A systematic method of tunable dispersion compensation based on chirped fiber Bragg gratings (CFBGs) without a center wavelength shift will be proposed. The specially designed mechanical rotator can flexibly control the chirping ratio along the fiber gratings and consequently the group delay. The group delay can be linearly controllable since the proposed method can induce the linear strain gradient with the rotation angle change. The dispersion value can be effectively controlled in the range from -495.5 to -1406.0 ps/nm corresponding to the rotation angle. The resonant wavelength shift of CFBG is less than 0.03 nm over the dispersion tuning range. The theoretical analysis of the tuning mechanism based on the proposed method will also be discussed.
IEEE Photonics Technology Letters 04/2004; · 2.19 Impact Factor
