White Paper

In: Science

Submitted By reenaharnal
Words 2652
Pages 11
A New Design Concept of Optical Fibers to Reduce
Non Linearity and Bend loss in Optical Networks
REENA HARNAL AND SAURAV DUTTA
E-2, Sterlite Technologies Ltd, MIDC, Aurangabad, India reena.harnal@sterlite.com, dutta_s@sterlite.com
Abstract: Fiber with an Enhanced value of SBS threshold and low macro bend Loss is presented in this paper.
The fiber has a SBS threshold value greater than 12 dBm and complies G.657A ITU-T specification for Bend loss. It can be used as a single line fiber in Optical networks.

1. INTRODUCTION
Stimulated Brillouin scattering is a dominant nonlinear process in optical networks. In long haul transmission systems, it degrades the output signal once input power reaches above a certain threshold
[1]. In FTTH networks bend loss is the main concern because of the stringent indoor wiring requirements.
Therefore there is a requirement of an optical fiber, which has an enhanced SBS threshold value and improved bend performance. Such a fiber can be used in different parts of the optical network, in long haul and access networks, as a single line fiber.

2. STIMULATED BRILLOUIN SCATERRING
AND BEND LOSS
Stimulated Brillouin scattering and Bend loss are the two fundamental effects which effect the signal transmission in optical networks. The below sections describes the principle behind Stimulated brillouin scattering and Bend loss.

2.1 Stimulated Brillouin scattering
Scattering is a general physical process whereby some form of radiation, such as light, sound, or moving particles, is forced to deviate from a straight trajectory by one or more localized non-uniformities in the medium through which it passes. When the optical power is such that the optical properties of the system are unmodified by the presence of the incident light beam, we refer to the scattering process as spontaneous or linear. The linear or…...

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