Any standard to select DWDM channels

[techinneed]

Hello All, 

We are putting our dark fiber in line, and will need to select the channels we want to use.

Normally channel 21 - 36 are used first.

I think this has to do with channel spacing 50GHz vs 100GHz vs 200GHz, but I could be wrong.

Any insight will be helpful!

John

[kayukovvalera · Accepted solution]

Hi,

There are no any standards. You just have to keep in mind some points:

- Higher channel number -> higher giant of EDFA on this channel. Any EDFA have amplification tilt, this is characteristic of giant depending on wavelength. Title regulate angle of this function. Tilt is could be provisioned and could be checked by Optical Spectrum Analyzer (OSA).

- When you choose consequent number of channels it could trigger Four-wave Mixing (FWM) effect. You have to leave blank channels between neighboring channels.

Also check nice article:

https://www.linkedin.com/pulse/walk-through-non-linear-impairments-optical-fiber-sanjay-yadav?trk=prof-post

[RAUF.SULYA1]

Dears,

I have below query on your configuration/ selection of channels ?

1. What type of modulation scheme you are configuring ? DP-BPSK, DP-QPSK, PM-8QAM,  or 16QAM ?

2. What type of network ? Longhaul ? Subsea ? Metro ? Regional Longhaul ?

3. What is the channel data rate ? Per wavelength data rate ? 50Gbs ? 100Gbps ? 150Gbps ? 200Gbps ? or more ..

The channel spacing depends on the requirements you choose..For less channel rate , the channel spacing will be more. Also, does your equipment support super channel ?

[Joanna -10Gtek]

Are you asking which channels are best? If that's the question, they're all the same in terms of performance. What you need to do is match the channels on the transceivers with those in the MUX/DEMUX you're using, that's about it.

10Gtek Online: www.sfpcables.com