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US-9478931-B2 · Oct 25, 2016 · US
Apparatus and method for controlling gain profile of an optical amplifier
US8995048B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8995048-B2 |
| Application number | US-201113113059-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 22, 2011 |
| Priority date | Oct 8, 2007 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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A change in loading conditions of fiber amplifiers in an optical communications network causes rapid variations in the gain profile of the amplifiers due to spectral hole burning and stimulated Raman scattering. An apparatus for reducing such gain profile variations is described which monitors optical signal perturbations and reacts by adjusting pump powers of the amplifiers and, or fast variable optical attenuator according to a pre-determined function stored in the form of constants in controller's memory. The optical signal is monitored as total power, and the power of light after passing through one or more optical filters. The light detection is relatively fast, whereby the gain profile variations are compensated by fast controlled variable optical attenuator and pump power adjustment upon the change in loading conditions.
First claim
Opening claim text (preview).
What is claimed is: 1. An apparatus for controlling a gain profile G(λ) of an optical amplifier comprising an erbium doped fiber amplifier (EDFA) for amplifying a stream of optical signals, the apparatus comprising: a detection device arranged to receive a tapped portion of the stream of optical signals in the form of N+1 sub-portions and to provide N+1 output signals P 0 . . . P N in dependence upon said N+1 sub-portions, wherein N is an integer positive number, the detection d…
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Electricity · mapped topic
- H01S3/1301Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8995048B2 cover?
- A change in loading conditions of fiber amplifiers in an optical communications network causes rapid variations in the gain profile of the amplifiers due to spectral hole burning and stimulated Raman scattering. An apparatus for reducing such gain profile variations is described which monitors optical signal perturbations and reacts by adjusting pump powers of the amplifiers and, or fast variab…
- Who is the assignee on this patent?
- Bolshtyansky Maxim, Cowle Gregory, Jds Uniphase Corp
- What technology area does this patent fall under?
- Primary CPC classification H01S3/1301. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).