Generation of multi-carrier based on a recirculating frequency shifter with delay interferometer

Abstract

Recirculating frequency shifter (RFS) can generate stable multi-carrier, but the carrier-to-noise-ratio (CNR) is limited because noise is accumulated round by round in the recirculation loop structure. A modified RFS with a delay interferometer (DI) is proposed in this paper. The DI can suppress the accumulated noise, and enhance the CNR of multi-carrier. The principle of the generation of high quality multi-carrier based on an RFS with DI is analyzed theoretically. 50 stable carriers with spacing of 10.7 GHz are successfully generated. The flatness of 50 stable carriers is 3 dB, and the CNR is 43 dB which is increased by 3 dB compared with the structure without DI.

Keywords

Power Spectrum Density / Amplify Spontaneous Emission / Optical Spectrum Analyzer / Erbium Dope Fiber Amplifier / Delay Inter

References

[1] MaY, YangQ, TangY, ChenS, ShiehW. 1-Tb/s per Channel Coherent Optical OFDM Transmission with Subwavelength Bandwidth Access, Optical Fiber Communication Conference, San Diego, 2009,

[2] WangD, ZouN-y, WangW-d, ZhangY-h. Optoelectronics Letters, 2013, 9: 3

[3] ZhangH, GaoX, ZhangJ, DengM, QiuK. Journal of Optoelectronics·Laser, 2013, 24: 493

[4] ParmigianiF, FinotC, MukasaK, IbsenM, RoelensM A, PetropoulosP, RichardsonD J. Opt. Express, 2006, 14: 7617

[5] WuR, Torres-CompanyV, LeairdD E, WeinerA M. 10-GHz Flat-topped Optical Frequency Comb with Ultrabroad BandwidthConference on Lasers and Electro-Optics, San Jose, CTu3M.4, 2012,

[6] YuJ, DongZ, ChiN. IEEE Photon. Technol. Lett., 2011, 23: 15

[7] ZouS, WangY, ShaoY, ZhangJ, YuJ, ChiN. Chin. Opt. Lett., 2012, 10: 7

[8] ZhangJ, YuJ, ChiN, DongZ, LiX, ShaoY, YuJ, TaoL. Opt. Lett., 2013, 38: 4

[9] LiJ, LiX, ZhangX, TianF, XiL. Analysis of the Stability of Recirculating Frequency Shifter Used as a Multi-Tone Wideband Light Source for Tb/s Multi-Carrier Optical TransmissionEuropean Conference and Exhibition on Optical Communication, Turin, 2010, 19

[10] LiJ, ZhangX, TianF, XiL. Generation of Stable and High-Quality Multicarrier Source Based on Re-circulating Frequency Shifter for Tb/s Optical TransmissionOptical Fiber Communication Conference, San Diego, OWE4, 2011,

[11] TianF, ZhangX, LiJ, XiL. J. Lightw. Technol., 2011, 29: 8

[12] ZhouH, XiL, LiJ, ZhangX, LiuN. Chin. Opt. Lett., 2012, 10: 10

[13] ZhangJ, YuJ, ChiN, ShaoY, TaoL, ZhuJ, WangY. J. Lightw. Technol., 2012, 30: 24