title: Multi-channel multi-carrier generation using multi-wavelength frequency shifting recirculating loop.
abstract: We propose and experimentally demonstrate a novel scheme to generate optical frequency-locked multi-channel multi-carriers (MCMC), using a recirculating frequency shifter (RFS) loop based on multi-wavelength frequency shifting single side band (MWFS-SSB) modulation. In this scheme, optical subcarriers with multiple wavelengths can be generated each round. Furthermore, the generated MCMC are frequency- and phase-locked within each channel, and therefore can be effectively used for WDM superchannel. Dual-wavelength frequency shifting SSB modulation is carried out with dual-wavelength optical seed source in our experimental demonstration. Using this scheme, we successfully generate dual-channel multi-carriers, and one channel has 28 subcarriers while the other has 29 ones with 25-GHz subcarrier spacing. We also experimentally demonstrate that this kind of source can be used to carry 50-Gb/s optical polarization-division-multiplexing quadrature phase shift keying (PDM-QPSK) signal.
authors.affiliation: Department of Communication Science and Engineering, Fudan University, 220 Handan Road, Shanghai 200433, China.
authors.forename: Xinying
authors.initials: X
authors.lastname: Li
authors.forename: Jianjun
authors.initials: J
authors.lastname: Yu
authors.forename: Ze
authors.initials: Z
authors.lastname: Dong
authors.forename: Junwen
authors.initials: J
authors.lastname: Zhang
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Shao
authors.forename: Nan
authors.initials: N
authors.lastname: Chi
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*