Tag Archives: Test Bed

IAB RESEARCH CORNER UPDATE

A team of students from the University of Arizona, Columbia University, the University of California, Los Angeles, the University of Southern California, and Cornell University completed a test bed insertion and demonstration of the CIAN Box in the TOAN test bed during the May NSF site review. The configuration is shown schematically in Figure 1.

Figure 1. Credit: CIAN Box Team. Schematic of CIAN Box test bed insertion and associated networking architecture. DE = Distance Emulation, CDC = Colorless, Directionless, Contentionless, WSS = Wavelength Selectable Switch, DLI = Delay Line Interferometer, OSNR = Optical Signal-to-Noise Ratio, TiSER = Time Stretched Enhanced Recorder – used for quality of service measurement, OFDM = Orthogonal Frequency-Division Multiplexing, DP-QPSK = Dual-Polarization Quadrature Phase Shift Keying, OOK = On/Off Keyed

The distance emulators are designed to implement a variety of network impairments as shown in Figure 2.  Various impairments, singly and in combination, were added to the signals and the quality of service (QOS) was monitored.  If the QOS fell below the desired level, the signal was switched onto a different channel with a potentially different encoding scheme.  After many late nights and long weekends the assembled system is shown in Figure 3.  A picture of the implementation team is shown in Figure 4.  Additional information can be found on the CIAN website.

Figure 2. Credit: CIAN Box Team.  Description of the different impairments that can be added to the system.  SMF = Single Mode Fiber, DCF = Dispersion-Compensating Fiber, PM = Polarization Maintaining, PDL = Polarization Dependent Loss, EDFA = Erbium Doped Fiber Amplifier, ROADM = Re-configurable Optical Add/Drop Multiplexer, SPM = Self Phase Modulation.

Figure 3.  CIAN Box Test Bed insertion

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