Optical signal to noise ratio system
AssigneeTejas Networks India Ltd.
InventorsRajeev ROY, Parthasarathi PALAI, Krishna THYAGARAJAN
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Abstract
The present invention provides a system for improving Optical Signal to Noise Ratio “OSNR” (208) of a transmission system using non gain-flattened optical amplifiers (101) and also provide an optically amplified Dense Wavelength Division Multiplexed “DWDM” transmission system that incorporates aforesaid system and has improved channel OSNR (208).
Claims27
A system for improving Optical Signal to Noise Ratio (OSNR) of a transmission system using non gain-flattened optical amplifiers, said system comprising a non gain-flattened optical amplifier (101) connected to a Demultiplexer (102) which splits the multichannel optical signal into its individual channels, a part of which is passed through a Coupling mechanism (103) and a Detector (104), and the other part is directly fed to a Variable Optical Attenuator (VOA) (106), signals from all detectors are fed to a Signal Processing Unit (105) whose output controls the setting of all the VOAs and outputs from all VOAs being connected to a Multiplexer (107).
Dependencies are inferred from the claim text.