Optical signal indicators detected by the MCA board

The implementation of the Super WDM system is different from that of the common WDM system in the line modulation format of the transmit part. The Super WDM system uses the CRZ encoding format while the common WDM system uses the NRZ encoding format. These two modulation formats have different spectral widths and shapes in the corresponding frequency domains. For the NRZ encoding format, the width of �?0 dB spectrum is about 0.2 nm to 0.3 nm, and the spectral shape is shown in Figure 1. For the CRZ encoding format, the width of �?0 dB spectrum is about 0.64 nm, and the spectral shape is shown in Figure 2. The existing MCA board cannot select the spectral width of the wavelengths to be scanned, the adjacent wave crests in three wave crests of the LWFS board will be scanned. As a result, the wavelength offset will exceed the threshold.

An MCA board can detect the following performance counters and report them to the system control board (the following information can be displayed on the U2000): Single-wavelength optical power Center wavelength Number of wavelengths on an optical path Using the OD wavelength monitoring and management license and the OD function, the MCA board can be used to detect the OSNR of signals whose rates are 10 Gbit/s, 40 Gbit/s, 100 Gbit/s, and 200 Gbit/s. When no OD wavelength monitoring and management license is configured and all the rates of the wavelength signals are less than or equal to 10 Gbit/s, OSNR detection is supported. If the system has signals whose rates are greater than 10 Gbit/s, there are the following restrictions: OSNR monitoring is not supported if adjacent channels have 50 GHz channel spacing. OSNR detection is supported only for signals whose rates are less than or equal to 10 Gbit/s if the channel spacing is 100 GHz.

The MCA board can be connected to various types of boards. The indicator refers to the single-wavelength optical power input to the MCA board, but not the output optical power of a board that the MCA board monitors.

The MCA board can detect the single-wavelength optical power, center wavelength, number of wavelengths on an optical channel, and OSNR. It cannot detect drifting wavelengths.

The MCA board can be connected to various types of boards. This indicator indicates the single-wavelength optical power of the MCA board, not the output optical power of the board to be monitored by the MCA board.