期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 40, 期 14, 页码 4642-4648出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2022.3167730
关键词
Optical fibers; Optical fiber sensors; Stimulated emission; Fiber nonlinear optics; Optical receivers; Brillouin scattering; Optical transmitters; Direct detection; Kramers-Kronig reception; optical carrier recovery; stimulated brillouin scattering
资金
- Australian Research Council [DP190100992]
- Air Force Office of Scientific Research [FA2386-16-1-4036]
- Office of Naval Research Global [N62909-18-1-2013]
Optical carrier recovery based on stimulated Brillouin scattering is proposed in this study to overcome the performance limits of Kramers-Kronig direct detection systems. The experimental results demonstrate significant improvement in optical signal-to-noise ratio and receiver sensitivity, indicating the potential of this method to enhance reach or power requirements for such systems.
Optical carrier recovery provides a method to increase the carrier-to-signal power ratio at the receiver side of an optical communications system. Here, we propose to use optical carrier recovery based on stimulated Brillouin scattering to help overcome performance limits of Kramers-Kronig direct detection systems that arise due to the need for a high carrier-to-signal power ratio. By transmitting a low power pilot tone along with the signal, we simplify the stimulated Brillouin scattering based optical carrier recovery subsystem, toward better compatibility with the technology demands of short-reach systems. Experimental results show that after 80 km standard single mode fibre transmission, an 8.8 dB required optical signal-to-noise ratio improvement is achieved by the proposed optical carrier recovery subsystem, when compared with the standard Kramers-Kronig direct detection system. Moreover, we measure a receiver sensitivity enhancement of more than 2.8 dB in an optically pre-amplified receiver. These results indicate the potential of the proposed optical carrier recovery subsystem to improve reach or power requirements for Kramers-Kronig direct detection systems.
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