排序方式: 共有65条查询结果,搜索用时 31 毫秒
1.
2.
In this paper we investigate the impact of finite laser linewidths (i.e. source partial coherence) on the crosstalk performance of optical frequency division multiplexing (OFDM) networks employing single-cavity Fabry-Perot demultiplexers. Results are presented that show the important limitation imposed by the finite laser linewidths on the attainable bit error rate (BER), maximum number of users, and the required power penalties to overcome this impairment 相似文献
3.
Analytical and numerical analysis of phase and amplitude errors in the performance of arrayed waveguide gratings 总被引:1,自引:0,他引:1
Munoz P. Pastor D. Capmany J. Sales S. 《IEEE journal of selected topics in quantum electronics》2002,8(6):1130-1141
The closed expression of the mean power transfer function for an arrayed waveguide grating (AWG), taking into account fabrication errors, is presented. Comparison with numerical simulations using a previous Fourier optics modeling show good agreement. The procedure to predict the AWG floor level using the numerical modeling is presented and checked against the analytical derived expressions. 相似文献
4.
Marti J. Pastor D. Tortola M. Capmany J. Montero A. 《Lightwave Technology, Journal of》1997,15(2):179-187
We report on the use of tapered linearly chirped fiber gratings to equalize dispersion-induced distortion in long distance/broad-band subcarrier multiplexed (SCM) systems. Different apodization functions for the coupling factor of the fiber grating have been considered and their equalizing capability of fiber-induced distortion in a subcarrier system have been compared. The results of the theoretical analysis show that both harmonic and intermodulation distortions are significantly reduced when the equalizer parameters have been properly designed. Higher reduction of the nonlinear distortion is obtained when the length of the filter increases, even though a saturation effect on this reduction figure appears when the equalizer length is about four or five times its minimum value to achieve equalization, which is derived theoretically based on the SCM optical system parameters. The performance of a Tanh-type tapered linearly chirped grating equalizer on a realistic broadband SCM system is also considered. The results reveal that the dispersion-induced distortion can be neglected when the equalizer is employed 相似文献
5.
We present a theory of optical bistability for fiber resonators driven by amplitude-stabilized laser sources of arbitrary coherence. The nonlinear wave equation is solved and the results are applied to analyze the effect of the source coherence on the relevant parameters of the structure such as the switch-on and switch-off powers, the critical input power for the onset of bistability and the cavity critical mistuning 相似文献
6.
We present, for the first time to our knowledge, closed expression for the computation of the harmonic and intermodulation distortions that appear on a wavelength converted two-tone subcarrier modulation (SCM) signal via cross gain modulation 相似文献
7.
An experimental demonstration is given of the use of a transversal RF photonic filter to accomplish intermodal dispersion equalisation in a 10 Gbit/s optical fibre link using a Fabry-Perot laser. The structure operates in an equivalent fashion to an electronic equaliser but in the photonic domain. A record distance of 24.2 km using the equalising filter is obtained. 相似文献
8.
Generalized Bloch wave analysis for fiber and waveguide gratings 总被引:1,自引:0,他引:1
We have developed a generalized Bloch wave approach for the analysis of aperiodic gratings. This method yields both a macroscopic (i.e., reflection or transmission coefficient) as well as a microscopic (i.e., dispersion diagram and microstructure of the propagating internal field) characterization of fiber and waveguide aperiodic gratings 相似文献
9.
Mora J. Ortega B. Andres M.V. Capmany J. Pastor D. Cruz J.L. Sales S. 《Electronics letters》2002,38(3):118-119
A novel dynamic chirping fibre Bragg grating device based on a magnetic field applied to a magnetostrictive transducer capable of tuning its dispersion is presented. Chirping ranges up to 300 ps/nm have been demonstrated, which are suitable for several applications such as tunable transversal filtering and dynamic dispersion compensation 相似文献
10.
Capmany J. Cascon J. Martin J.L. Sales S. Pastor D. Marti J. 《Lightwave Technology, Journal of》1995,13(10):2003-2012
This paper deals with the synthesis of fiber-optic delay line filters and is organized as follows. We show how filters with negative coefficients can be implemented using positive structures and differential detection at the optoelectronic conversion. This possibility implies that not only lowpass, but bandpass and highpass filters with arbitrary transfer functions may be implemented. Synthesis methods for positive filters based on modified versions of well-known time and frequency domain techniques are presented which take into account the restriction on the positive nature of the filter coefficients. We make use of these results to describe the synthesis procedure for arbitrary filters using fiber-optic structures. Some designs of lowpass, bandpass and highpass filters are presented as examples, and a possible implementation of these structures with a view of future optoelectronic integration is presented 相似文献