Apparatus of adjusting optical signal transmission timing

Details Apparatus of adjusting optical signal transmission timing Apparatus of adjusting optical signal transmission timing

2007-03-29

2009-06-16

Li, Shi K (Department: 2613)

Optical communications

Multiplex

Broadcast and distribution system

C398S063000

Reexamination Certificate

active

07548694

ABSTRACT:
In a light reception element such as an APD (Avalanche Photo Diode) used for receiving a high-speed and weak optical signal, it is possible to prevent the phenomenon of distortion of a signal inputted after a large-level light is received. A PON (Passive Optical Network) system includes an OLT (Optical Line Terminal) which can impartially and effectively transmit light reception data to each ONU (Optical Network Unit). According to a light reception amplitude received by each ONU, an inter-frame gap of an appropriate length is assigned for each ONU. The OLT includes a unit for measuring and accumulating the reception light amplitude and data on the inter-frame gap of an appropriate length decided in advance according to the characteristic of the light reception device and generates a grant value for assuring an inter-frame gap of an appropriate length by using the both information.

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