Channel spacing of 200G signals

12

For 10G, 40G, and 100G signals, the channel spacing is 50 GHz for an 80-wavelength system and 100 GHz for a 40-wavelength system.
For 200G signals, the flexible grid technology can be used. When the technology is used, wavelength bandwidth is variable. For example, if different modulation methods are used for 200G signals, the required bandwidth is different. For example, it can be 75 GHz or 150 GHz.Flexible ROADM adjusts bandwidth based on signals and grooms the signals to specified directions according to the network configurations.

Other related questions:
Channel spacing of 200G line rates
For 10G, 40G, and 100G line rates, the channel spacing is 50 GHz for an 80-wavelength system and is 100 GHz for a 40-wavelength system. For 200G signals, the flexible grid technology can be used. When the technology is used, the channel spacing is not fixed and can be set. For example, the channel spacing of 200G signals can be set to 37.5 GHz.

Wavelength spacing for 200G signals
For 10 Gbit/s, 40 Gbit/s, and 100 Gbit/s signals, the wavelength spacing is 50 GHz for an 80-wavelength system and 100 GHz for a 40-wavelength system. For 200 Gbit/s signals, the flexible grid technology can be used. When the technology is used, wavelength bandwidth is flexible, instead of being fixed at 50 GHz or 100 GHz. For example, if different modulation methods are used for 200 Gbit/s signals, different required bandwidth is required. (For example, it can be 75 GHz or 150 GHz). Flexible ROADM adjusts bandwidth based on signals and grooms the signals to specified directions according to the network configurations.

Support for multi-channel signal monitoring by MCA4 boards
The MCA4 board uses a 1 x 4 optical switch, and therefore can monitor the information about one signal, including the wavelength information, optical power, and OSNR.

Replacement of optical modules with different channel spacings for 1600G devices
Question: WDM-side optical modules of the OTU boards on 1600G devices come in two types: 50 GHz and 100 GHz channel spacing ones. Can these two types of optical modules with the same frequency and rate replace each other? Analysis: The differences between the two types of optical modules are as follows: 1. Modules in a 50 GHz spacing system have high requirements on wavelength stability. A wavelength locker is integrated in a module, whereas the modules in a 100 GHz spacing system have no wavelength locker. 2. These two types of modules have different dispersion tolerances. The 50 GHz type has a dispersion tolerance of 1500 ps/nm, whereas the 100 GHz type has that of 800 ps/nm. However, with the improvement in processing techniques, the difference in dispersion tolerances will become smaller and smaller. Answer: 1. The 100 GHz modules should not be used to replace the 50 GHz modules on the OTU boards. 2. The 50 GHz modules can be used to replace the 100 GHz modules. However considering different types of optical modules on the entire network, you are advised to replace modules with the same type modules.

Whether the spacing specifications for adjacent channels refer to the specifications on fibers or in vacuum
The spacing specifications for adjacent channels refer to the specifications on fibers.

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top