Whether the link comes up?

Question

Hi,I now working on the fiber optics with CWDM.I wanted know whether it is possible to connect a transceiver withanother with different wavelength. For eg: 1470 nm connected to 1590nm.If this is done,1. Whether the link comes up?2. If link is up,Data flows or not?help me in this please. I want to know the exact reason.

miniotdr · Accepted Answer

Hello There,Okay. Simple. Ever tried to listen to KFRC by setting up your tuner on104.7MHz ?That is the reason.HTH,_Marc     a =E9crit :

stan · Answer

CWDM is ITU( standardwith 20nm grid to allow for uncooled cheaper source where 1310, 1550,1490, 1510nm are most popular wavelengths.  Most transcievers should bemade with this standard in mind and offer at least 16 wavelengths.  Youneed to choose Rx type (PD vs. APD) for sensitivity requirements andcheck manufacturer's wavelength-temperature dependance.  What is theoperating temp?I guess your looking at products from Avago, Finisar, MRV, OCP etc.now.     wrote:

gunajoe · Answer

Hi stan,I am using the products of Hi optel..the operating temp is 70 cplease assist me further in this.

stan · Answer

You realize transceiver is physical layer device only, right? (i.e. it doesn't care about layer1, layer2 protocol etc.) Digital link of any of these devices in combination should work together independant of wavelength if

- used within operating temp.

- and used within data rate limits (i.e. 2.5G over 0 to 70C).

- If there are passive devices planned between them, you have to plan network carefully (add/drops/MUX/DMUXs); but that should be network planner/product manager guy's job.

You simply have to provide the correct voltage levels for electrical serial data i/o and clock lines on your host board - assuming you are desiging the board. Transceiver manufacturer should tell you this. If you plan analog link, this is trickier and you may wish against it.

Whether the link comes up?

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