We propose a stable multi-longitudinal Brillouin/semiconductor fiber laser （BSFL） as the upstream source in a bidirectional single-fiber wavelength-division multiplexing-passive optical network （WDM-PON）. The down...We propose a stable multi-longitudinal Brillouin/semiconductor fiber laser （BSFL） as the upstream source in a bidirectional single-fiber wavelength-division multiplexing-passive optical network （WDM-PON）. The downstream wavelength serves as the pump of the BSFL. Brillouin-frequency-shifted （-10.8 GHz） upstream carrier is generated to suppress the Rayleigh backscattering and back reflection-induced crosstalk. The stable multi-longitudinal operation of the BSFL, attributed to the four-wave mixing （FWM） effect in the semiconductor optical amplifier （SOA） reduces the difficulty of generating a stable single-longitudinal fiber laser-based upstream carrier. Bidirectional symmetric transmission at 10 Gb/s over a 12.5-km single mode fiber with less than 2-dB power penalty is demonstrated.展开更多
A novel architecture of converged radio-over-fiber （RoF） and wavelength division multiplexed passive optical network （WDM-PON） system, namely RoF-WDM-PON, is demonstrated. 20-GHz 1-Gb/s radio frequency （RF） sign...A novel architecture of converged radio-over-fiber （RoF） and wavelength division multiplexed passive optical network （WDM-PON） system, namely RoF-WDM-PON, is demonstrated. 20-GHz 1-Gb/s radio frequency （RF） signals and 1-Gb/s baseband （BB） signals are simultaneously generated and transmitted using optical carrier suppression （OCS） modulation techniques. The proposed scheme is compatible with the conventional RoF and PON system. 25-km single-mode fiber （SMF） transmission is successfully achieved.展开更多
A cost-effective ultra-dense wavelength-division-multiplexed passive optical network(UD-WDM PON) with speed of 12.5 Gbit/s and channel spacing of 12.5 GHz is proposed and demonstrated. The distributed feedback(DFB) la...A cost-effective ultra-dense wavelength-division-multiplexed passive optical network(UD-WDM PON) with speed of 12.5 Gbit/s and channel spacing of 12.5 GHz is proposed and demonstrated. The distributed feedback(DFB) lasers modulated in 4-level pulse amplitude modulation(4-PAM) format are used for downstream links, and the reflective semiconductor optical amplifiers(RSOAs) together with an optical frequency comb modulated in quadrature phase shift keying(QPSK) format are used for upstream links. We can achieve the error-free transmission of the upstream signals with speed of 12.5 Gbit/s even after 20 km single-mode fiber(SMF). The power penalty obtained by using the frequency comb generator instead of a tunable laser is around 0.5 d B. By using 11 DFB lasers and a set of intensity and phase modulators, it is possible to provide the seed light for 297 optical network units(ONUs) within the C-band.展开更多
基金supported by the National "973" Program of China (Nos. 2010CB328204 and 2010CB328205)the Nature Natural Science Foundation of China (Nos.61007041,61090393,and 60825103)+1 种基金the National 863 Program of Chinathe Program of Shanghai Subject Chief Scientist (No. 09XD1402200)
文摘We propose a stable multi-longitudinal Brillouin/semiconductor fiber laser （BSFL） as the upstream source in a bidirectional single-fiber wavelength-division multiplexing-passive optical network （WDM-PON）. The downstream wavelength serves as the pump of the BSFL. Brillouin-frequency-shifted （-10.8 GHz） upstream carrier is generated to suppress the Rayleigh backscattering and back reflection-induced crosstalk. The stable multi-longitudinal operation of the BSFL, attributed to the four-wave mixing （FWM） effect in the semiconductor optical amplifier （SOA） reduces the difficulty of generating a stable single-longitudinal fiber laser-based upstream carrier. Bidirectional symmetric transmission at 10 Gb/s over a 12.5-km single mode fiber with less than 2-dB power penalty is demonstrated.
基金supported in part by the National Natural Science Foundation of China (Nos. 60736003,61025004,and 61032005)the National "863" Program of China (Nos. 2009AA01Z222 and 2009AA01Z223)+1 种基金the Foundation of the Key State Lab of Integrated Optoelec-tronics (No. 2010KFB007)the China Postdoctoral Science Foundation
文摘A novel architecture of converged radio-over-fiber （RoF） and wavelength division multiplexed passive optical network （WDM-PON） system, namely RoF-WDM-PON, is demonstrated. 20-GHz 1-Gb/s radio frequency （RF） signals and 1-Gb/s baseband （BB） signals are simultaneously generated and transmitted using optical carrier suppression （OCS） modulation techniques. The proposed scheme is compatible with the conventional RoF and PON system. 25-km single-mode fiber （SMF） transmission is successfully achieved.
基金supported by the National Natural Science Foundation of China(No.61475015)
文摘A cost-effective ultra-dense wavelength-division-multiplexed passive optical network(UD-WDM PON) with speed of 12.5 Gbit/s and channel spacing of 12.5 GHz is proposed and demonstrated. The distributed feedback(DFB) lasers modulated in 4-level pulse amplitude modulation(4-PAM) format are used for downstream links, and the reflective semiconductor optical amplifiers(RSOAs) together with an optical frequency comb modulated in quadrature phase shift keying(QPSK) format are used for upstream links. We can achieve the error-free transmission of the upstream signals with speed of 12.5 Gbit/s even after 20 km single-mode fiber(SMF). The power penalty obtained by using the frequency comb generator instead of a tunable laser is around 0.5 d B. By using 11 DFB lasers and a set of intensity and phase modulators, it is possible to provide the seed light for 297 optical network units(ONUs) within the C-band.
