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This paper reports our recent work on narrow-linewidth tunable laser, which utilizes two etalons in the external cavity to obtain linewidth < 100 kHz, tuning range ∼ 40 nm, SMSR > 60 dB and fiber-coupled output power > 20 mW.
A simple switchable microwave frequency generator based on a multi-wavelength fiber grating laser is proposed and demonstrated. Microwave signal of 10.4 GHz, 21.2 GHz, and 31.6 GHz can be obtained by simple adjustment of a polarization controller.
We introduce parametric tunable dispersion compensator that has advantages of wide grid-less operating bandwidth and fast tuning response. The intrinsic two features are attributed to its tuning scheme based on FWM process in highly-nonlinear fiber with a low dispersion slope.
Trends in integrating communication functionality to complement existing services by next-generation energy-saving white LED lighting are reviewed. Challenges at component and system level are discussed to enable visible light communication a practical service provision infrastructure.
This paper proposed system design scheme, and introduced how to use a MCU to control every module. Then, we make the analysis and evaluation of the performance, have some summary and prospect for the key problems
An all-optical sampling OFDM with interleaved modulation formats scheme for WDM PON application is proposed. It can flexibly adjust the modulation format and data rate due to different channel performance or different user requirements. This sheme has 80 Gb/s transmission data rate and can coexist with traditional WDM channel.
Optical interconnect techniques has been accepted to enable high bandwidth and low power dissipation in data center. We propose a hybrid switching strategy which improves the bandwidth utilization within a given power budget and maintains considerable performance.
An optical-frequency lightning signal test system is introduced in this article. The wavelet transform can be used to remove the noise effectively. The simulation results show the wavelet transform works good and can be applied popularization.
This paper clarifies the feasibility of MMF and POF for future networks by considering the measured loss characteristics of commercially available 1 × 2 splitters for the double star topology.
The model structure of 40G/100G Ethernet and the key implementation technology Multi-Lane Distribution Mechanism (MLD) are thoroughly researched. Furthermore, three kinds of networking schemes based on 40G/100G Ethernet are proposed.
A chaotic Ultra-wideband (UWB) over fiber link with steerable and flatted power spectrum is demonstrated, which generates the photonic UWB signals using chaotic dynamics of the semiconductor laser with optical feedback.
In this paper, we summarize two chromatic dispersion monitoring techniques in high-speed transmission systems (> 40-Gbit/s). One method is based on optical filtering and RF spectrum analysis. The other one utilizes delay-tap sampling.
This paper discusses techniques for photonic analog-to-digital conversion with differential encoding, which increases the equivalent number of bits. A new structure using dual-drive unbalanced Mach-Zehnder modulator is proposed.
A pair of polarity-reversed doublet pulses is generated based on a Mach-Zehnder modulator (MZM) and two cascaded semiconductor optical amplifiers (SOAs). The UWB polarity is controlled by adjusting the bias voltage of Mach-Zehnder modulator (MZM).
A 40 Km fiber bidirectional chaotic communication system, composed of a driving chaotic semiconductor laser and twin semiconductor lasers, is proposed. We experimentally observe synchronization between the twin lasers driven by a chaotic signal, generated by the driving laser and after being transported in a pair of 20 Km single mode fibers. Based on the high-quality synchronization between the twin...
A lightpath tracing scheme based on prime-number-encoded tags is proposed for all-optical reconfigurable wavelength routing networks. All traversed network nodes along the lightpath of a received optical packet can be identified at the destination node.
We improve the phase stabilization of remote RF distribution based on opto-eletronic delay locked-loop with a different wavelength backward signal. RMS jitter measured at remote end is under 730fs for a 10GHz, 100km transmission.
We report a new mcirowave photonic filter that offers continously tunable true time delays, based on the concept of fractional delay lines. Proof of concept experiments demosntrate a 10-tap microwave photonic fractional delay filter.
We present initially a novel real-time phase tracking method for drift phase, which is described by single-photon counts, and introduce an active compensating way for the periodic phase drift.
A graphene based, wide-band tunable soliton fiber laser exploiting the intracavity birefringence-induced spectral filter is demonstrated. By rotating the PC, the central wavelength of soliton pulse can be continuously tuned from 1531.5 to 1568.3 nm.
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