Transmission Impairment Mitigation for Single-Sideband Signals by Optical Phase Conjugation

• Published in: IEEE photonics technology letters Vol. 32; no. 3; pp. 150 - 153
• Main Authors: Zhang, Honghui, Zhang, Qiulin, Huang, Chaoran, Shu, Chester
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.02.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Amplitude modulation; Compensation; Conjugation; Dispersion; Fiber optic communications; four-wave mixing; Noise sensitivity; Nonlinear optics; Optical communication; optical fiber communication; Optical modulation; Optical pumping; Optical receivers; Optical sensors; Optical signal processing; optical single-sideband modulation; Optical transmitters; Orthogonal Frequency Division Multiplexing; Phase conjugation; Q factors; Signal to noise ratio; Single sideband transmission
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/LPT.2019.2962712

We experimentally demonstrate an optical phase conjugation (OPC) enhanced transmission system based on the Kramers-Kronig direct detection scheme. The single-sideband signal is modulated at 80-Gb/s 16-QAM with orthogonal frequency-division multiplexing. In the 180-km transmission experiment, the OPC surpasses digital chromatic dispersion compensation in Q factor, optimum launched optical power (LOP) and optical signal-to-noise ratio (OSNR) sensitivity. The improvement in Q factor, optimum LOP and OSNR sensitivity are 0.9 dB, 1.0 dB, and 1.7 dB respectively. The superiority of OPC over pure optical dispersion compensation is also analyzed by simulation. The results indicate that the OPC is an effective means to enhance the transmission performance of single-sideband signals.