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Nonlinear distortion in few-mode fibers for intermediate coupling is studied for the first time. Coupling strengths beyond −20 dB/100m give suppression of nonlinear distortion below the isolated mode without mode coupling.
A X(2)-stage SHG/OPA configuration enabled low-crosstalk and guard-band-less DWDM signal amplification. We demonstrated a 5.6-dB link-SNR improvement and a low NF of 2.1 dB below the 3-dB quantum limit in simultaneous 16-channel-signal amplification.
We report on the non linear tolerance of multicarrier modulation versus the size of the WDM bandwidth. At high bandwidth efficiency, our results indicate that the gain of multicarrier is dependent on the WDM bandwidth.
We transmit CM DP-16QAM signals at 4.88 b/s/Hz SE in C+L band EDFAs. We demonstrate nonlinearity noise mitigation by MAP-LMS equalizer. We show 2 dB error-correction margin improvement over DP-8QAM after 6,673 km transmission.
We evaluate the transmission performances of 28-Gb/s polar RZ PAM-N (N=2, 3, 4, and 5) upstream signals in 20-km long loopback SSMF link by using a directly-modulated RSOA and direct-detection receiver.
Leveraging high transmission bandwidth and loss budget provided by high launch power, we experimentally demonstrate 4-λ 224-Gbps 32-CAP 60-km transmission using cost-effective 10-GHz-class EAM/PIN, supporting >3-Gbps/ONU for a 64-ONU LR-PON, without inline and pre-amplifier.
We apply DBP to an experimental WDM system where multisubcarrier transmission provides a 12% reach gain vs. single-carrier. DBP provides further gain for both single- and multisubcarrier systems but significantly underperforms ideal theoretical predictions.
We investigate Nyquist spectral shaping using two-channel-interleaved DAC with zero-order holding for Nyquist-WDM 64QAM systems, which requires FIR filter with 57 taps, bandwidth of 0.4–0.6 times of the symbol rate, and DAC resolution >7 bits.
We demonstrate an integrated photonic orbital angular momentum beam multiplexer consisting of four nested arc waveguide gratings. Well-defined OAM mode emissions over wide bandwidth of 1-nm enables simultaneous wavelength division multiplexing and OAM multiplexing.
The bandwidth continued to rise significantly due to the revolution in information services, so a system that can meet the bandwidth demand is needed. Existing development undertaken by service providers was less efficient and effective so it is necessary to build an integrated fiber optic communication system for all service providers. The object of this paper is to design a fiber optic transmission...
This paper analyses the spectral efficiency of hybrid subcarrier multiplexed (SCM) Optical Code Division Multiple Access (OCDMA) and conventional OCDMA based on AND Subtraction technique. We compared the spectral efficiency of SCM and the conventional OCDMA with respect the number of weights and number of users. Results indicate that the SCM OCDMA is more efficient compared to conventional OCDMA.
Using a wavelength division multiplexer, we increase the spectral bandwidth of a multimode-fiber-based spectrometer to 100nm with the spectral resolution of 0.03nm. An effective algorithm is developed to achieve fast, accurate reconstruction of diversified spectra.
This paper presents an analytical discussion of the trade-off between fairness and efficiency for some fairness-generating schemes taken from the literature, assuming multi-class traffic and elastic networking. Basic schemes under discussion include spectrum partitioning and pseudo-partitioning, trunk reservation, and combinations thereof.
The paper proposes a resources allocation method for EON based on a modified RDM using squatting and kicking strategies in order to prioritise the usage of channels and enhancing the total utilisation. It can also be used as an admission control. The mechanism is described and compared to existing proposals, regarding the flexibility in the allocation per class. The strategy regards the EON constraints...
We present a novel strategy for the operation of a mixed fixed/flexible grid optical network which would be useful for the gradual migration from a fixed to a flexible mode of operation. Routing and spectrum allocation (RSA) in co-existing fixed/flexible grid optical networks with a multi-path sub-band virtual concatenation (VCAT) technique is considered. An integer linear programming (ILP) model...
This Paper presents a realistic approach on tackling the dynamic traffic generation problem for Wavelength Division Multiplexing Optical Networks. Given the relatively novel aspect of these networks, most research in this area was mainly focusing on the problems of routing and wavelength assignment while using fairly simplistic memoryless models for traffic generation in the simulated networks. The...
InAs/ InP quantum dash based mode locked lasers are particularly suited for frequency comb generation. Multi-terabit/s data transmission has been achieved using one single chip.
A novel multi Optical Line Terminal (OLT) based WDM/TDM Passive Optical Network (PON) is proposed to ensure the Quality of Service (QoS) and fault protection for next generation(NG) PON systems. The future PON systems provide higher bandwidth and accommodate many types of users, its service level must be differentiated and this property should be maintained even during a protection mode. To meet this...
Low-power, high-speed optical interconnects are essential to future high-performance computers and data centers for the cloud. Using CMOS-compatible silicon photonics processes, we have developed integrated photonic devices, such as 80 Gb/s optical modulators with ultralow power consumption at the level of femtojoule per bit and O-band on-chip wavelength multiplexers. These devices are promising for...
The seemingly insatiable demand for mobile, video and cloud-based services shows no sign of slowing down. High bandwidth-consuming applications such as super-sized cloud storage and 4K/Ultra High Definition video services are becoming more and more popular. This causes requirements for optical networks to reach transmission of 100 Gbps and beyond. However, going beyond 100 Gbps does not come without...
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