随着全球信息化的进程,人们提出了建立无处不在的、网络社会的目标,如何解决建筑物内高速宽带无线数据传输和无线接入覆盖问题已经成为迫切需要解决的关键技术问题。光无线接入是近来被广泛研究的问题,它可以结合光纤通信和无线通信两...随着全球信息化的进程,人们提出了建立无处不在的、网络社会的目标,如何解决建筑物内高速宽带无线数据传输和无线接入覆盖问题已经成为迫切需要解决的关键技术问题。光无线接入是近来被广泛研究的问题,它可以结合光纤通信和无线通信两者的优势,实现宽带灵活接入。光载无线(Radio over Fiber)接入技术是使用光纤链路来传输微波、毫米波信号,属于混合光无线接入技术,迅速成为国际学术界研究的热点。结合作者的研究,对RoF光载无线系统、相关的关键技术和尚存在的问题进行系统地介绍和分析,展望RoF技术未来的发展趋势。展开更多
In this paper, we have designed and proofed a widely tunable microwave photonic filter (MPF) on the basis of self-adaptive optical carrier regeneration method through stimulated Brillouin scattering (SBS) amplificati...In this paper, we have designed and proofed a widely tunable microwave photonic filter (MPF) on the basis of self-adaptive optical carrier regeneration method through stimulated Brillouin scattering (SBS) amplification. The MPF system features with a single microwave passband as the result of the processed signal sideband beating with the regenerated optical carrier. Since the Brillouin-laser optical carrier and the SBS amplification are generated from one laser source, the optical carrier regeneration process of the proposed MPF is self- adaptive and carrier-frequency independent. Moreover, by simply varying the wavelength spacing between the optical carrier and the optical filter, the central passband of the MPF can be continuously tuned from 6 to 32 GHz, which is limited by the bandwidth of the modulator and the photodetector. The 3 dB bandwidth and the out-of-band suppression ratio of the MPF can reach 640 MHz and 21 dB, respectively.展开更多
文摘随着全球信息化的进程,人们提出了建立无处不在的、网络社会的目标,如何解决建筑物内高速宽带无线数据传输和无线接入覆盖问题已经成为迫切需要解决的关键技术问题。光无线接入是近来被广泛研究的问题,它可以结合光纤通信和无线通信两者的优势,实现宽带灵活接入。光载无线(Radio over Fiber)接入技术是使用光纤链路来传输微波、毫米波信号,属于混合光无线接入技术,迅速成为国际学术界研究的热点。结合作者的研究,对RoF光载无线系统、相关的关键技术和尚存在的问题进行系统地介绍和分析,展望RoF技术未来的发展趋势。
基金supported by the National Natural Science Foundation of China (Grant Nos. 61501422 & 61377071)the Equipment Development Project of Chinese Academy of Sciences (Grant No. YZ201201)
文摘In this paper, we have designed and proofed a widely tunable microwave photonic filter (MPF) on the basis of self-adaptive optical carrier regeneration method through stimulated Brillouin scattering (SBS) amplification. The MPF system features with a single microwave passband as the result of the processed signal sideband beating with the regenerated optical carrier. Since the Brillouin-laser optical carrier and the SBS amplification are generated from one laser source, the optical carrier regeneration process of the proposed MPF is self- adaptive and carrier-frequency independent. Moreover, by simply varying the wavelength spacing between the optical carrier and the optical filter, the central passband of the MPF can be continuously tuned from 6 to 32 GHz, which is limited by the bandwidth of the modulator and the photodetector. The 3 dB bandwidth and the out-of-band suppression ratio of the MPF can reach 640 MHz and 21 dB, respectively.
