What are different componets of DWDM ? Which type of amplifiers are widely used?

[M.N.S.]

[abhi...@gmail.com]

On Thursday, 27 September 2012 05:31:14 UTC+1, M.N.S. wrote:
>
Hello Manik sir,

System Components of DWDM are

Optical Amplifiers : Erbium Doped Fiber Amplifier (EDFA) and raman amplifier used , amplify a weak, distorted signal with the aim of generating a good signal
Wavelength Converters:convert data on an input wavelength onto a possibly
different output wavelength within the operation bandwidth of the system.
Wavelength Add/Drop Multiplexer:
Optical Cross Connect:
Optical Gateways:

[nitin soni]

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Hello Sir,

The basic and very important component of DWDM are

At transmitter site: (Terminal Site A)
1. Transponder (Trans/Recieve)
2. Multiplexer(MUX)/Demultiplexer (DMUX)
3. Booster/Amplifier
4. OSC

At Amplifier site Like (ILA/OLA/OA):
1. Dual OSC
2. 2 sets of Amplifier/Booster.

At receiver site:(Terminal Site B)
1. Transponder (Trans/Recieve)
2. Multiplexer(MUX)/Demultiplexer (DMUX)
3. Booster/Amplifier
4. OSC

[nitin soni]

Types of Amplifier in DWDM.
1. EDFA amplifier for C-band
2. Raman amplifier for L-band

[Stephen]

FWIW Raman operates over a wide set of bands and there are commercial
C band Raman amplifers (from Ciena and Xtera among others)

Note you description of the components assumes the DWDM system is
"classic telecom" style - with bi - directional point to point
traffic.

Practical systems tend to have compensation built into the system
either as fixed passive compensators, or within the electronics of the
transponders, or both.

Finally DWDM depends on an underlying analog transport system, and 1
of the important bits is to keep all channels in the acceptable light
level - many systems have electronic controlled attenuation within
some or all nodes to "level up" the power for the various channels to
minimise distortion.
--
Regards

stephe...@xyzworld.com - replace xyz with ntl