Evaluating method and parameter testing method for optical equipment of dense wavelength division multiplexing (DWDM) system

Abstract

The invention discloses an evaluating method and a parameter testing method for optical equipment of a dense wavelength division multiplexing (DWDM) system and provides a standard parameter and an evaluating method for the optical equipment of the DWDM system as well as a testing method for the parameter. The evaluating method for the optical equipment comprises the following steps of: determining a phase parameter testing value of the optical equipment to be evaluated; comparing the phase parameter testing value with a phase parameter threshold; and evaluating whether the optical equipment is available or not. The parameter testing method comprises the following steps of: adjusting the phase parameter of the optical equipment within the determined channel frequency range; and when the transmission performance of the system is ensured, taking the phase parameter at the time as a first phase parameter threshold for evaluating the optical equipment within the channel frequency range.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a dense wavelength division multiplexing system optical equipment evaluation and parameter testing method. Background technique [0002] With the growth of communication bandwidth, the optical transmission system develops rapidly. At present, a Dense Wavelength Division Multiplexing (DWDM, Dense Wavelength Division Multiplexing) system with a single-channel rate of 40 Gb / s and a frequency interval of 50 GHz has been commercially available. Due to the increase of the rate, such as 40Gb / s rate, the original OOK (On-Off Keying) modulation mode has greater transmission damage and its application is limited. DPSK (Differential Phase Shift Keying) or DQPSK (Differential Quadrature Phase Shift Keying) ) and other phase modulation methods are widely used. Services are carried in this phase modulation mode, and the optical filter parameters of the equipment have a great impact on th...

AI Technical Summary

Problems solved by technology

The business is carried by this phase modulation method, and the optical filter parameters of the equipment have a great impact on the system

The optical equipment that can work normally in the 10Gb / s system can no longer guarantee the normal operation of the system when transmitting 40Gb / s

[0003] figure 1 The group delay (Group delay, GR) spectrum of the 50GHz comb optical filter (interleaver) shown, this device can guarantee the normal operation of the system in the 10Gb / s system, but it will introduce excessive cost in the 40Gb / s system , the system does not work properly

[0004] At present, no suitable parameters have been found to regulate high-speed Dense Wavelength Division Multiplexing (DWDM) system optical equipment (mainly refers to optical filters)

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