High-quality frequency-locked optical frequency comb source for terabits optical communication system

Abstract. A comprehensive investigation is done on a high-quality frequency comb or multicarrier generation using a single-sideband modulation based recirculating frequency shifter (SSB-RFS), which has shown a good capability to provide a large number of frequency-locked carriers for terabits transmission. The dominant factors, such as I/Q modulator, direct current-bias, radio-frequency signal, and band pass filter, are analyzed theoretically and experimentally in terms of the metrics such as flatness, signal-to-noise ratio, and stability. The achieved 69 flat tones by noise suppressed SSB-RFS are presented. An example of SSB-RFS based 2.56  Tb/s PDM-RZ-16QAM 792 km transmission is illustrated, which is enabled by the 20 high-quality carrier tones generated with the optimally operated SSB-RFS source.

[1]  Xiaoping Zheng,et al.  Generation of broadband optical frequency comb with rectangular envelope using cascaded intensity and dual-parallel modulators , 2014 .

[2]  Pedro Andrés,et al.  Lossless equalization of frequency combs. , 2008, Optics letters.

[3]  Tetsuya Kawanishi,et al.  Optical frequency comb generator using optical fiber loops with single-sideband modulation , 2004, IEICE Electron. Express.

[4]  B. Zhu,et al.  Transmission of a 1.2-Tb/s 24-carrier no-guard-interval coherent OFDM superchannel over 7200-km of ultra-large-area fiber , 2009, 2009 35th European Conference on Optical Communication.

[5]  Jianjun Yu,et al.  Flattened comb generation using only phase modulators driven by fundamental frequency sinusoidal sources with small frequency offset. , 2013, Optics letters.

[6]  Changyuan Yu,et al.  Complementary frequency shifter based on polarization modulator used for generation of a high-quality frequency-locked multicarrier. , 2014, Optics letters.

[7]  S. Mino,et al.  Linear optical IQ modulator for high-order multilevel coherent transmission , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[8]  Lixia Xi,et al.  Theoretical and experimental study on generation of stable and high-quality multi-carrier source based on re-circulating frequency shifter used for Tb/s optical transmission. , 2011, Optics express.

[9]  Wei Jin,et al.  Scalable and reconfigurable generation of flat optical comb for WDM-based next-generation broadband optical access networks , 2014 .

[10]  H.I. Bassen,et al.  An RF Field Strength Measurement System Using Unintegrated Optical Linear Modulator , 1980, 1980 IEEE MTT-S International Microwave symposium Digest.

[11]  Lixia Xi,et al.  Theoretical analysis of polarization control for the stable output of multi-carrier source based on a re-circulating frequency shifter , 2012 .

[12]  T. Kawanishi,et al.  Linear single-sideband modulation for high-SNR wavelength conversion , 2004, IEEE Photonics Technology Letters.

[13]  Deming Liu,et al.  Tunable optical frequency comb enabled scalable and cost-effective multiuser orthogonal frequency-division multiple access passive optical network with source-free optical network units. , 2012, Optics letters.

[14]  B Zhu,et al.  1.12-Tb/s 32-QAM-OFDM superchannel with 8.6-b/s/Hz intrachannel spectral efficiency and space-division multiplexed transmission with 60-b/s/Hz aggregate spectral efficiency. , 2011, Optics express.

[15]  Feng Tian,et al.  Experiment of 2.56-Tb/s, polarization division multiplexing return-to-zero 16-ary quadrature amplitude modulation, 25 GHz grid coherent optical wavelength division multiplexing, 800 km transmission based on optical comb in standard single-mode fiber , 2013 .

[16]  Zhaohui Li,et al.  Frequency-locked multicarrier generator based on a complementary frequency shifter with double recirculating frequency-shifting loops. , 2013, Optics letters.

[17]  Lixia Xi,et al.  Analysis of the stability and optimizing operation of the single-side-band modulator based on re-circulating frequency shifter used for the T-bit/s optical communication transmission. , 2010, Optics express.

[18]  Jiachuan Lin,et al.  Low noise optical multi-carrier generation using optical-FIR filter for ASE noise suppression in re-circulating frequency shifter loop. , 2014, Optics express.

[19]  P. Poggiolini,et al.  On the Performance of Nyquist-WDM Terabit Superchannels Based on PM-BPSK, PM-QPSK, PM-8QAM or PM-16QAM Subcarriers , 2011, Journal of Lightwave Technology.

[20]  Evgeny Myslivets,et al.  Generation of 1500-tone, 120nm-wide ultraflat frequency comb by single CW source , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[21]  W. Shieh,et al.  1-Tb/s single-channel coherent optical OFDM transmission over 600-km SSMF fiber with subwavelength bandwidth access. , 2009, Optics express.

[22]  Lixia Xi,et al.  Generation of stable and high-quality frequency-locked carriers based on improved re-circulating frequency shifter , 2012 .

[23]  Bo Huang,et al.  Generation of coherent and frequency-lock multi-carriers using cascaded phase modulators and recirculating frequency shifter for Tb/s optical communication. , 2011, Optics express.

[24]  Wei Jin,et al.  Hybrid WDM-OFDMA-PON utilising tunable generation of flat optical comb , 2013 .