Showing papers by "Shuisheng Jian published in 2002"
TL;DR: In this paper, the authors studied the effect of polarization mode dispersion (PMD) on Gauss pulse transmission over ultra-high PMD fiber and showed that PMD is a distortion arising from unwanted birefringence in optical fiber.
Abstract: It is first time to study on Gauss pulse transmission over ultra-high PMD fiber. Gauss pulse isbroken into a series of deformed pulse when it transmits over ultra-high PMD fiber. He has explained that the walk-off deformed pulses cause by ultra-high PMD. Transmitted experiment hasbeen done using fiber with PMD coefficient 237.95ps/km112. The simulated result is consistent withexperiment. Keywords: Polarization mode dispersion, Ultra-high PMD fiber, Optical fiber communication, Coupled nonlinear Schrodinger equations, Monte Carlo simulation 1. INTRODUCTION The increasing demand for bandwidth is driving most telecommunication operators toward thedeployment of large capacity transmission systems. When chromatic dispersion and loss in opticalfiber no longer limits the data-rate transmission systems, polarization mode dispersion (PMD) couldbecome the key factor to update high-performance optical transmission and networks. In high bitrate optical communication systems beyond 10 Gb/s, signal distortion caused by PMD is a majorlimitation on transmission distance1. PMD is a distortion arising from unwanted birefringence in
2 citations
TL;DR: In this article, a numerical algorithm is proposed to simulate DWDM transmission systems amplified by backward multi-wavelength-pumped Raman amplifiers, where the impacts caused by dispersion, nonlinearity, and ASE are considered.
Abstract: We propose a new and efficient numerical algorithm to simulate DWDM transmission systems amplified by backward multi-wavelength-pumped Raman amplifiers. In this model, system impacts caused by dispersion, nonlinearity, and ASE are considered, and calculated results have satisfying accuracy. As an application, we model a 64 × 10 Gb/s Raman broadband multi-span system, and arrive at some useful conclusions. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 333–337, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10599
1 citations
TL;DR: In this article, the dispersion and polarization mode dispersion (PMD) in 120km G652 SMF was successfully compensated by two chirp FBGs in a 40Gb/s OTDM transmission system.
Abstract: We used the UV exposure system, and two FBGs(Fibre Bragg Gratings) centered at 1546. mm Bragg wavelengths were fabricated out in H2-loaded fiber successfully by a fixed 1069.O3nm phase mask and 248nm KrF excimer laser, and it can be used as dispersion compensator in 40G OTDM system, and the dispersion and Polarization mode dispersion(PMD) in 120km G652 SMF was successfully compensated by two chirp FBGs in a 40Gb/s OTDM transmission system.
1 citations
TL;DR: In this paper, the dispersion compensation of 4×10Gb/s 800km G652 fiber by chirped optical fiber Bragg grating (FBG) was originally implemented, and the characteristics of FBG are optimized, so that the ripple coefficient of reflectivity and time delay are less than 09dB and 30ps, respectively.
Abstract: In this paper, the dispersion compensation of 4×10Gb/s 800km G652 fiber by chirped optical fiber Bragg grating (FBG) was originally implemented The characteristics of FBG are optimized, so that the ripple coefficient of reflectivity and time delay are less than 09dB and 30ps, respectively When BER is 10−10, the power penalties of transmission are 136 dB 089 dB, 167 dB and 132 dB
1 citations
TL;DR: In this article, the authors present a simulation analysis of Gauss pulse broadening due to polarization mode dispersion and polarization dependent losses in long single-mode fibers, and they find that probability density function of broadening is a combined Rayleigh and Gauss distribution function.
Abstract: The authors present a simulation analysis of Gauss pulse broadening due to polarization mode dispersion and polarization dependent losses in long single-mode fibers. It is found that probability density function of pulse broadening is a combined Rayleigh and Gauss distribution function.
1 citations
TL;DR: In this article, the authors proposed a method to optimize the output gain profile based on the characteristics of a WDM pumped Raman gain spectra and the fact that different wavelength pumps have different impacts on the gain tilt.
Abstract: We propose a new and efficient method to optimize the output gain profile based on the characteristics of a WDM pumped Raman gain spectra and the fact that different wavelength pumps have different impacts on the gain tilt. As an application, we optimize a 10 wavelength pumped fiber Raman amplifier in a short time, and a 80 nm flat gain band with less than 0.4 dB ripple has been derived. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 381–383, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10614
1 citations
TL;DR: In this article, the authors proposed a novel structure to enhance pump conversion efficiency and noise characteristics of L-band EDFAs by adding only a input-reflect fiber Bragg grating and reflecting fractional backward ASE power as a secondary forward pump to further amplify the signal light.
Abstract: In this paper we propose a novel structure to enhance pump conversion efficiency and noise characteristics of L-band EDFAs. By adding only a input-reflect fiber Bragg grating and reflecting fractional backward ASE power as a secondary forward pump to further amplify the signal light, larger than 20dB small signal gain improvement and 1dB NF decrease can be achieved. We also investigate the influences of different wavelength FBGs. Experimental results agree well with numerical simulations.
TL;DR: In this article, a self-made chirped fiber Bragg gratings (CFBGs) with fluctuating error of reflectivity less than 1dB, the delay ripple less than +/- 15ps and the temperature coefficient being as low as 0.5
Abstract: With a new apodisation method and special package material, we have made high-quality chirped fiber Bragg gratings (CFBGs) with the fluctuating error of reflectivity less than 1dB, the delay ripple less than +/-15ps and the temperature coefficient being as low as 0.5‰onm/°C. Using such self-made high-quality CFBGs, we present, for the first time, the experiment results of dispersion compensation of 2x10Gb/s 1000km WDM system with less than 1 dB power penalty for each channel.
TL;DR: In this article, the polarization mode dispersion (PMID) of chirped fiber Bragg gratings (FBG) written on different photosensitive optical fibers was studied and compared.
Abstract: We have shown the polarization mode dispersion (PMID) of chirped fiber Bragg gratings (FBG) written on different photosensitive optical fibers. PMD of FBGs on special photosensitive fibers and hydrogenated single mode fiber (SMF) was studied and compared. Experiment results showed that the chirped FBG written on hydrogenated SMF has very low differential group delay (DGD), and it adapt in long-haul optically amplified lightwave systems. The PMD of chirped FBG is determined by the birefringence of the fiber and the dispersion of the chirped FBGs. The birefringence of FBG involved intrinsic and extrinsic or photo-induced birefringence. At the end of this paper, we presented the PMID of the dispersion compensation system using CFBG as dispersion compensator.
TL;DR: In this paper, the authors used UV laser to write Bragg gratings on the polarization maintaining fiber (PMF) and measured the polarization of the grating at the end of the article.
Abstract: We used UV laser to write Bragg gratings on the polarization maintaining fiber (PMF). Because of the high-birefringence of the fiber, the Bragg wavelength of the grating on the two polarization axes was different. So that it could introduce great polarization mode dispersion (PMD). When the input was adapted to the axis of the grating, it can serve as the polarization compensation. We measured the polarization of the grating at the end of the article.
TL;DR: In this article, the cylindrical waveguide (optical fiber) with a metal outer clad was analyzed and the propagation constant of core mode and clad mode were derived from vector method and then solved by numerical method.
Abstract: The cylindrical waveguide (optical fiber ) with a metal outer clad were analysed. The propagation constant of core mode and clad mode were derived from vector method and then solved by numerical method. And some characteristics of the mode in metal clad fiber were studied. We also analysied the effect of metal clad to the long-period fiber grating.