共查询到18条相似文献,搜索用时 46 毫秒
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针对直接调制的半导体激光器产生的非线性啁啾,设计了一种新型的三次啁啾光纤光栅,与线性啁啾光纤光栅相比,它能更为彻底地补偿此类非线性啁啾. 相似文献
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啁啾光栅色散及时延特性研究 总被引:1,自引:1,他引:1
基于耦合模理论,通过对耦合波方程进行相位共轭变换,将反向耦合波方程变换为Riccati微分方程,利用数值解法对常耦合系数和高斯型耦合系数线性啁啾光栅的反射特性、色散特性和时延特性进行了详细分析,为设计具有理想效果的色散补偿器件提供了有效的理论方法。 相似文献
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To model chirped fiber Bragg gratings (FBGs) for dispersion compensation in optical fibers a novel method of single expression
(MSE) is used. The reformulation of Helmholtz’s equation in the MSE to the full set of first-order differential equations
leads to dealing with the electric field amplitude, its derivative, power flow density and phase distributions in any aperiodic
media. The phase derivative obtained numerically permits to compute the dispersion slope in the time delay of investigated
chirped gratings. Reflective and time delay spectra of linearly chirped gratings of different lengths and chirp coefficients
are computed. A self-similarity law for the gratings of the same strength but different lengths and chirp coefficients is
revealed. The apodization of gratings is applied to reduce sidelobes in gratings’ reflection spectra and eliminate oscillations
in the time delay characteristics. 相似文献
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To model chirped fiber Bragg gratings (FBGs) for dispersion compensation in optical fibers a novel method of single expression (MSE) is used. The reformulation of Helmholtz's equation in the MSE to the full set of first-order differential equations leads to dealing with the electric field amplitude, its derivative, power flow density and phase distributions in any aperiodic media. The phase derivative obtained numerically permits to compute the dispersion slope in the time delay of investigated chirped gratings. Reflective and time delay spectra of linearly chirped gratings of different lengths and chirp coefficients are computed. A self-similarity law for the gratings of the same strength but different lengths and chirp coefficients is revealed. The apodization of gratings is applied to reduce sidelobes in gratings' reflection spectra and eliminate oscillations in the time delay characteristics. 相似文献
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J. D. Ania-Casta n P. Garcí a-Fern ndez A. S nchez-Dí az J. M. Soto-Crespo 《Optics Communications》1999,170(4-6):373-380
Different fibre Bragg grating dispersion compensation schemes are studied for a directly modulated 1550 nm single-mode semiconductor laser signal through a standard nonlinear fibre link. The laser diode is simulated by its stochastic rate equations, while the nonlinear Schrödinger equation is used to simulate the propagation. The optimum length for dispersion compensation after transmission through 100 km SSM fibre is studied. Pulses with a FWHM of the order of 65 ps with any linewidth-enhancement factor are reconstructed using pre-compensation or post-compensation with an apodized 5.75 cm chirped fibre Bragg grating. 相似文献