In this paper a novel low power online chromatic dispersion (CD) monitoring method is presented, which employs spectral shift in the semiconductor optical amplifier (SOA). The advantage of this method lies in that the...In this paper a novel low power online chromatic dispersion (CD) monitoring method is presented, which employs spectral shift in the semiconductor optical amplifier (SOA). The advantage of this method lies in that the required input power can be much reduced, and the filter output can be used in the dynamic CD compensation system. The simulation indicates that the filtered power decreases with CD increases, and that the monitoring range increases as the filter bandwidth increases.展开更多
A novel microstructure fiber （MF） structure is proposed for broadband dispersion compensation. Through manipulating the four air-hole parameters and the pitch, the broad band dispersion compensation MF can be effici...A novel microstructure fiber （MF） structure is proposed for broadband dispersion compensation. Through manipulating the four air-hole parameters and the pitch, the broad band dispersion compensation MF can be efficiently designed. The newly designed MF could compensate （to within 0.8%） the dispersion of 101 times of its length of standard single mode fiber over the entire 100-nm band centered on 1550 nm. The proposed design has been simulated through the finite difference beam propagation method, and the corresponding design procedures are also presented. OCIS codes： 060.2310, 060.2280.展开更多
A tunable polarization mode dispersion (PMD) compensator based on strain-ckirped fiber Bragg gratings (FBGs) is proposed. It natures in flexible designing, large tuning range, without using linear or nonlinear chirped...A tunable polarization mode dispersion (PMD) compensator based on strain-ckirped fiber Bragg gratings (FBGs) is proposed. It natures in flexible designing, large tuning range, without using linear or nonlinear chirped phase mask, fast tuning response time, continuously adjustable, all-fiber based, compact, and cheap.展开更多
Based on the full-vector finite element method,a novel structure of highly negative dispersion photonic crystal fiber with the central index dip in the low germanium doped core is proposed.The highly negative dispersi...Based on the full-vector finite element method,a novel structure of highly negative dispersion photonic crystal fiber with the central index dip in the low germanium doped core is proposed.The highly negative dispersion can be obtained at the wavelength of 1.55 μm by adjusting the pitch,the air-hole diameter in the third ring,the germanium doped concentration and the influence of central index dip.展开更多
A novel dispersion slope compensator is proposed and fabricated using a sampled fiber grating. The dispersion slope of this compensator is demonstrated to match that of Coming LS fiber for a multi-channel 50GHz WDM sy...A novel dispersion slope compensator is proposed and fabricated using a sampled fiber grating. The dispersion slope of this compensator is demonstrated to match that of Coming LS fiber for a multi-channel 50GHz WDM system.展开更多
基金This work was supported by the National Natural Science Foundation under Grant No. 90104003.
文摘In this paper a novel low power online chromatic dispersion (CD) monitoring method is presented, which employs spectral shift in the semiconductor optical amplifier (SOA). The advantage of this method lies in that the required input power can be much reduced, and the filter output can be used in the dynamic CD compensation system. The simulation indicates that the filtered power decreases with CD increases, and that the monitoring range increases as the filter bandwidth increases.
基金This work was supported by the National Basic Research Program of China (No. 2003CB314900) the Key Grant Project of Chinese Ministry of Education (No. 104046)
文摘A novel microstructure fiber （MF） structure is proposed for broadband dispersion compensation. Through manipulating the four air-hole parameters and the pitch, the broad band dispersion compensation MF can be efficiently designed. The newly designed MF could compensate （to within 0.8%） the dispersion of 101 times of its length of standard single mode fiber over the entire 100-nm band centered on 1550 nm. The proposed design has been simulated through the finite difference beam propagation method, and the corresponding design procedures are also presented. OCIS codes： 060.2310, 060.2280.
基金This work was supported by the National 973 Basic Research and Development Program of China (No. 2003CB314901), the National Natural Science Foundation of China (No. 60377026), the National "863" High Technology Project of China (No. 2003AA311070),
文摘A tunable polarization mode dispersion (PMD) compensator based on strain-ckirped fiber Bragg gratings (FBGs) is proposed. It natures in flexible designing, large tuning range, without using linear or nonlinear chirped phase mask, fast tuning response time, continuously adjustable, all-fiber based, compact, and cheap.
基金supported by the National Natural Science Foundation of China (Grant No.60877033)Key Program of Education Ministry of China (Grant No.308002)
文摘Based on the full-vector finite element method,a novel structure of highly negative dispersion photonic crystal fiber with the central index dip in the low germanium doped core is proposed.The highly negative dispersion can be obtained at the wavelength of 1.55 μm by adjusting the pitch,the air-hole diameter in the third ring,the germanium doped concentration and the influence of central index dip.
文摘A novel dispersion slope compensator is proposed and fabricated using a sampled fiber grating. The dispersion slope of this compensator is demonstrated to match that of Coming LS fiber for a multi-channel 50GHz WDM system.
