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Time resolved optical experiments, as useful tools, give scientists a chance to research the dynamic processes ‘frame by frame’ of a series of ultrafast phenomena, including high resolution terahertz spectroscopy [1], transient absorption spectroscopy [2] and so on. In the beginning, ‘Mechanical Delay Line’ is employed to scan the time differences between the pump and the signal, but this method is...
We propose and demonstrate pump-phase-noise-free 2-to-7 multichannel wavelength multicasting for QAM signals using flexible coherent multi-carrier pump. <0.4dB penalty is obtained after multicasting with the proposed scheme even using 3-MHz-linewidth DFB laser as pump source.
Through FWM in our fabricated QD-SOA and without additional pumps, three 1-to-3 WDM multicasts and three XOR logic gates are simultaneously realized for three 10 Gbps NRZ-DPSK signals. The error-free performance is achieved for all of the signals and the power penalties are < 1.3dB at BER of 10−9.
We propose and demonstrate pump-phase-noise-tolerant 1-to-7 wavelength multicasting for QAM signals using flexible coherent multi-carrier pump. Less than 0.8dB penalty is obtained after multicasting with the elimination of phase noise from pump using coherent pumping.
We experimentally demonstrate a 50-Gbps 16QAM wavelength conversion with <0.2dB penalty, based on FWM in HNLF using coherent pumps. The coherent pumping makes it independent of the phase noise from pumps and enables the use of cost-effective pump laser.
We propose and experimentally demonstrate optical data exchange scheme between 16QAM and QPSK with narrow spacing of 50GHz. The use of coherent pump makes it free of phase noise from pumps, and enables the use of low-cost DFB as pump source.
We experimentally demonstrate an optical wavelength shifting scheme of 20Gbaud 16QAM based on cascaded 2nd-order nonlinearities in PPLN using coherent pumps, which is free of the phase noise from pumps.
We experimentally demonstrate wavelength conversion of a 50-Gbps 36QAM using four-wave mixing effect in highly-nonlinear fiber. Error free is experimentally achieved with a 0.3-dB power penalty at BER of 10−3 with respect to the input.
We experimentally demonstrate 1-to-9 optical wavelength multicasting, based on dualpump four-wave mixing in highly-nonlinear fiber. A 100-km field trial experiment is also conducted to demonstrate the feasibility of optical wavelength multicasting.
Optical coherence tomography is a promising technique for monitoring the sub-clinical change that occurs not only in the mucosa surface, but also within the mucosa layer to improve the diagnostic accuracy. In this study, a hydraulic pumped optical scanning probe is designed for in-vivo detection of colon lumen by integrating with the colonoscope. Quantification algorithm of OCT image characteristics...
We experimentally demonstrate a 160-Gb/s tunable and phase-transparent wavelength conversion using cSFG-DFG in a linear-chirped PPLN. Thanks to the enhanced conversion bandwidth, no any optical equalizer was required to compensate the spectrum distortion.
RZ-DPSK OTDM demultiplexing from 40 to 10 Gbps is achieved using OPA with clock-modulated pump. <1.3-dB penalty and ~28-dB gain were achieved for four demultiplexed channels.
We demonstrate an OTDM de-multiplexer with power amplification using optical parametric amplifier with a clock-modulated pump. 25-dB gain and less than 2-dB power penalty were obtained for de-multiplexed four 10-Gb/s tributaries from a 40-Gb/s data.
The infrared-single-photon at 1.55 mum had been manipulated by the strong pump laser at 1.06 mum in the periodically poled lithium niobate crystal in the cavity of diode-pumped Nd:GdVO4 ring laser. A hour-level stable and 96% upconversion efficient technology had been developed.
We have demonstrated a polarization-interleaved WDM system with a two-orthogonal-pump OPA (2OP-OPA). The sensitivity has been improved by about 2 dB compared to its counterpart with all WDM channels co-polarized with the same signal gain.
We have demonstrated, for the first time to our knowledge, simultaneous all-optical inverted and non-inverted wavelength conversion by using a single-stage two-pump fiber optical parametric amplifier with extinction ratio between 7 and 14 dB over 24 nm
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