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Optical digital filters that employ optical delay lines are proposed. Properly locating the zeros in the transfer function is shown to enable interleaver pairs to be designed with the same amplitude r...
Energy-efficiency of Drop-and-Continue Traffic Grooming
Energy-efficiency Drop-and-Continue Traffic Grooming
2015/5/25
This paper evaluates the energy-savingachievable by performingtraffic grooming in WDM networks with drop-and-continue node architecture. Different grooming strategies are compared in terms of network ...
Flexible and Compact Hierarchical Optical Cross-Connect Node with Waveband Add/Drop Restriction
Fiber optics optical communications Switching circuit
2015/5/22
flexible and compact hierarchical optical cross-connect (HOXC) node that considers a practical waveband add/drop restriction is proposed. We introduce a prototype HOXC system and verify its technical ...
2.3-Tbit/s (23 X 100-Gbit/s) RZ-DQPSK Grooming Switch (Simultaneous Add/Drop, Data Exchange and Equalization) Using Double-Pass LCoS and Bidirectional HNLF
Fiber optics communications Nonlinear optics four-wave mixing
2015/5/22
We present a 2.3-Tbit/s network switching element by exploiting double-pass LCoS technology and bidirectional nonlinear effects inside a single HNLF. We demonstrate 2.3-Tbit/s grooming switch with sim...
Novel Hierarchical Optical Cross-Connect Architecture Utilizing Dedicated Add/Drop Switches that Effectively Offer Colorless and Directionless Capability
Optical communications Switching circuit
2015/5/22
Hierarchical optical cross-connect architectures based on dedicated add/drop switches for terminating traffic is proposed. The architecture can significantly reduce switch scale for implementing color...
Provisioning Schemes Accounting for ROADM Add/Drop Constraints in GMPLS-based WSON
Provisioning Schemes Accounting ROADM Add/Drop Constraints GMPLS-based WSON
2015/5/21
Provisioning schemes exploiting the recently introduced GMPLS extensions for add/drop in WSONs are proposed to effectively handle different ROADM structures and provide a preference on the utilization...
640Gbit/s Reconfigurable OTDM Add-Drop Multiplexer
640Gbit/s Reconfigurable OTDM Add-Drop Multiplexer
2015/5/20
A 640Gbit/s reconfigurable OTDM add/drop multiplexer is demonstrated, using a single periodically-poled Lithium-Niobate waveguide in a counter-propagating configuration.Error free operations confirm t...
Less than 0.19-dB Transient Gain Excursion AGC-EDFA with Digital Control for 20-Channel Add/Drop Equivalent Operation
Transient Gain Excursion AGC-EDFA Digital Control 20-Channel Add/Drop
2015/5/20
We have developed a digitally controlled AGC-EDFA by combining an FF-controlled pump-LD and an FB-controlled VOA. An FPGA is used to finely tune the gain setting of the pump current with a wide dynami...
Optical Network Design Algorithms that Consider Optical Path Add/Drop Ratio Restrictions for OXC Hardware Scale Reduction
Optical Network Design Algorithms Hardware Scale Add/Drop Ratio
2015/5/18
We develop network design algorithms that consider constraints on the number of added/dropped optical paths at nodes in terms of wavelength and of fiber. The strategy is demonstrated to significantly ...
Compact 4x4 Optical Cross-connect with Add/Drop Ports using PLC Technology
Compact 4x4 Optical Cross-connect Add/Drop Ports PLC Technology
2015/5/18
Compact and practical 4-degree optical cross-connect equipment with add/drop ports is realized for use in connecting ROADM ring networks. Eight 40-channel AWGs and forty 4x4 matrix switches are integr...
Sub-wavelength add/drop multiplexers are pragmatic and efficient systems that could drive the next generation of networks. In this paper we will discuss on the potential of this new technology and on ...
Integrated Drop-Filter for Dispersion Compensation Based on SOI Rib Waveguides
Dispersion compensation devices Integrated optics devices
2015/6/8
A drop-filter for dispersion compensation based on tapered Bragg gratings in SOI waveguides is presented. We show fabrication and characterization of the device, which separates one WDM channel with a...
Development of Novel Cicada-Resistant Optical Drop Cable
Development Novel Cicada-Resistant Optical Drop Cable
2015/6/5
By observation of cicada ovipositor’s movement, we found that tensile strength and hardness of sheath material are effective against cicada attack.. And also, we have newly designed the optical drop c...
Impacts of Waveband Capacity and Waveband Add/Drop Ratio on the Performance of ROADM-Ring Connecting Hierarchical Optical Path Cross-Connects
Networks assignment routing algorithms Networks ring
2015/6/5
We analyze the performance of a multiple-ROADM-ring connected network that utilizes Hierarchical Optical Cross-Connects (HOXC). We clarify the impacts of the waveband capacity and waveband add/drop ra...
FWM-based All-Optical Phase Drop for Format Conversion from 320-Gb/s RZ-DQPSK to 160-Gb/s RZ-DPSK
Phase Drop Format Conversion RZ-DQPSK RZ-DPSK
2015/7/20
We experimentally demonstrated format conversion from 320-Gb/s RZ-DQPSK to 160-Gb/s RZ-DPSK through the proposed all-optical phase drop scheme. It can be applied to drop a binary tributary from a mult...