A novel approach to generate 60 GHz optical carrier suppression(OCS) millimeter-wave(mm-wave) signal based on the saturated optical parametric amplification(OPA) effect in high non-linear fiber(HNLF) is investigated.I...A novel approach to generate 60 GHz optical carrier suppression(OCS) millimeter-wave(mm-wave) signal based on the saturated optical parametric amplification(OPA) effect in high non-linear fiber(HNLF) is investigated.In the proposed system,the OPA effect occurs when the signal and pump with 30 GHz frequency interval are set into the high non-linear fiber.By controlling the length of HNLF,OPA effect saturates,and the pump power is delivered in a large extent to the signal and idler light,so a 60 GHz OCS mm-wave is generated.The system does not need high-speed external modulator,high-frequency vibration source or narrow-band filter,which greatly reduces the cost and improves the stability of the radio over fiber(ROF) system.Results show that the 10 Gb/s downstream signal can be transmitted with negligible power penalty.展开更多
A novel radio-over-fiber(ROF) system has been proposed and simulated, which is based on orthogonal frequency division multiplexing(OFDM) and asymmetrical filtering of optical carrier suppression(OCS) technique, so it ...A novel radio-over-fiber(ROF) system has been proposed and simulated, which is based on orthogonal frequency division multiplexing(OFDM) and asymmetrical filtering of optical carrier suppression(OCS) technique, so it can effectively suppress the fading effect caused by power periodic variation in traditional OCS system. Simulation results show that the 2.5 Gbit/s OFDM-modulated wideband wireless signal can be transmitted over 25 km single mode fiber(SMF) successfully.展开更多
The Equilibrium geometrical optimizations on OCS linear and nonlinear molecules in the singlet and triplet states have been made using density functional theory B3LYP method with 6-31l++G**and aug-CC-pVTZ basis sets.T...The Equilibrium geometrical optimizations on OCS linear and nonlinear molecules in the singlet and triplet states have been made using density functional theory B3LYP method with 6-31l++G**and aug-CC-pVTZ basis sets.The ground state is 1∑with linear C∞v symmetry The linear and nonlinear structures in singlet state can be stable,and there is only nonlinear stablestructure in triplet state.展开更多
基金supported by the Major State Basic Research Development Program of China (No. 2010CB328304)the National Natural Science Foundation of China (Nos. 60807022 and 60677003)
文摘A novel approach to generate 60 GHz optical carrier suppression(OCS) millimeter-wave(mm-wave) signal based on the saturated optical parametric amplification(OPA) effect in high non-linear fiber(HNLF) is investigated.In the proposed system,the OPA effect occurs when the signal and pump with 30 GHz frequency interval are set into the high non-linear fiber.By controlling the length of HNLF,OPA effect saturates,and the pump power is delivered in a large extent to the signal and idler light,so a 60 GHz OCS mm-wave is generated.The system does not need high-speed external modulator,high-frequency vibration source or narrow-band filter,which greatly reduces the cost and improves the stability of the radio over fiber(ROF) system.Results show that the 10 Gb/s downstream signal can be transmitted with negligible power penalty.
文摘A novel radio-over-fiber(ROF) system has been proposed and simulated, which is based on orthogonal frequency division multiplexing(OFDM) and asymmetrical filtering of optical carrier suppression(OCS) technique, so it can effectively suppress the fading effect caused by power periodic variation in traditional OCS system. Simulation results show that the 2.5 Gbit/s OFDM-modulated wideband wireless signal can be transmitted over 25 km single mode fiber(SMF) successfully.
文摘The Equilibrium geometrical optimizations on OCS linear and nonlinear molecules in the singlet and triplet states have been made using density functional theory B3LYP method with 6-31l++G**and aug-CC-pVTZ basis sets.The ground state is 1∑with linear C∞v symmetry The linear and nonlinear structures in singlet state can be stable,and there is only nonlinear stablestructure in triplet state.
