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The coherence properties of a frequency comb generated by a SiN microring resonator is shown to be changed by the feedback through a self tracking, narrowband single longitudinal mode filter in an active fiber loop.
We report the spectral pump equalization of on-chip microresonator frequency combs in the drop-port geometry. A smoother comb spectrum is obtained and a saturation behavior of the optical pump in the microresonator is observed.
An optical diode transmits forward 10Gbps data with less than 0.5dB power penalty, while suppressing and distorting backward data with a 11dB nominal power penalty. The nonreciprocal transmission is also demonstrated with a silicon modulator.
We propose and experimentally demonstrate UWB monocycle generation using non-degenerated two-photon absorption in a silicon waveguide. A 8.69-GHz 10-dB bandwidth (BW) and a 154.5% fractional bandwidth is achieved with a ∼125 ps monocycle pulse.
A method of reconfigurable frequency up/down-conversion using an optical parametric loop mirror is proposed. Up-conversion of up to 60GHz and down-conversion from 40GHz for single and WDM signals are demonstrated.
We experimentally demonstrate 40-to-320-Gbit/s phase-coherent WDM-to-TDM multiplexing based on cross-phase modulation (XPM) and subsequent 320-to-40-Gbit/s demultiplexing using XPM-induced frequency shift in highly nonlinear fibers. An average penalty of approximately 7 dB at 10-9 BER is observed after the nonlinear processes.
We report a novel method for all-optical generation of differential Manchester phase-shift keying (DMCPSK) coding. Multicasting generation of 40 Gbit/s DMCPSK coding is experimentally demonstrated using non-degenerate four-wave mixing (ND-FWM) in a highly nonlinear fiber (HNLF).
Tunable wavelength conversion of picosecond (ps)-pulses based on cascaded sum- and difference frequency generation is proposed and demonstrated by use of a fiber ring laser incorporating a periodically poled lithium niobate waveguide and two parallel-arranged tunable filters (TFs). The pulsed signal with 40-GHz repetition rate and 1.57-ps pulsewidth is employed. No external pump and control sources...
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