What are the sources of micro bending loss? How it can be overcome?

Mumbai University > Electronics and telecommunication > Sem 7 > optical communication and networks

Marks: 10

Years: MAY 2016

1 Answer

Minimize micro bending losses:

To minimize the losses following precautions are taken

i. While manufacturing the cable; a precise control of core diameter is maintained.

ii. A compressible jacket is fitted over the fiber, so that when the external pressure is applied then the deformation of jacket takes place and there will not be creation of micro bends in the core layer of fiber.

iii. To avoid deterioration in the optical fiber transmission characteristics resulting from mode-coupling-induced microbending, it is important that the fiber is free from irregular external pressure within the cable.

iv. Carefully controlled coating and cabling of the fiber is therefore essential in order to minimize the cabled fiber attenuation.

v. Furthermore, the fiber cabling must be capable of maintaining this situation under all the strain and environmental conditions envisaged in its lifetime.

vi. Minimal losses were predicted at operating wavelengths below 1.3 μm, with a rapid rise in attenuation at wavelengths above 1.5 μm.

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