OPM

Optical power monitoring per channel is required in the DWDM system in order to control the transmission performance. By measuring power using OPM and selectively pre-emphasizing each transmitter output power using variable optical attenuation OSNR at the end of the link can be optimized. OPM-4-C-50G and OPM-4-C-FLX is a 4 port and OPM-2-C-50G is a two port card which measure optical power from either 4 or 2 monitoring input ports such as OFA in the C band at 50GHz, respectively. Each card is half slot and a total of two such cards can be used in one slot in TJ1600 product family chassis with an optical adapter card.

Front panel

The following figure shows the front panel of OPM-4-C-50G and OPM-2-C-50G, and with an adapter card.

The following figure shows the front panel of OPM-4-C-FLX.

Power specifications

OPM - Power Specifications

Functional description

The schematic diagram of the OPM-4-C-50G and OPM-2-C-50G cards is as follows:

The input ports can be connected to any optical monitoring ports such as the monitoring ports of the OFA cards for optical power read out up to 96 Channels at 50GHz intervals.

Typical specifications

Typical specifications and functionalities of the OPM cards are as follows:

• Support C-band 50GHz DWDM 80 channel power monitoring.
• Supports either 2 port or 4 port inputs to be monitored.
• With additional software license, OPM cards can support OSNR monitoring of 10G, 100G and 200G traffic channels.

The following table summarizes the different parameters and its typical values:

OPM - Typical Specifications