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How to estimate the fibre loss at certain wavelength?

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husseinadel

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fibre loss

hello
i want to estimate the fibre loss at certain wavelength,,,,,can anyone help me ??

thanks

hussein
 

Re: fibre loss

For estimation of losses you can use the attached graph ..

The amount of attenuation for a given cable is also wavelength dependent. Figure 3 shows the attenuation profile for the two main types of fibre; multi-mode and single-mode cable (described in detail below). The absorption peak at 1000nm is caused by the peculiarities of single mode fibre while the peak at 1400nm is caused by traces of water remaining in the fibre as an impurity. Due to this water absorption peak there are two standard single-mode wavelengths in use, 1310nm and 1550nm. 1310nm has been a standard for many years, only now is there a trend towards using 1550nm brought about by the need to extend the distances between repeaters.
Click to expand...

Quoted from:
https://www.gare.co.uk/technology_watch/fibre.htm

Regards,
IanP
 

Re: fibre loss

The above graph only suites for SMF28 fiber. So it will be better to make sure that u are using that fiber.
use a caliberated source and caliberated power meter and simply find the loss through your fiber.
 

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