US 12,573,803 B2 · Control method and optical fiber amplifier

Abstract

Disclosed are a control method and an optical fiber amplifier. The optical fiber amplifier is configured to execute the control method. The method comprises: initially adjusting a target gain on the basis of a first offset gain to obtain the post-initial-adjustment target gain; when the actual power of the pump laser reaches target power determined on the basis of the post-initial-adjustment target gain, obtaining, on the basis of a first signal optical power and a second signal optical power, a second offset gain and a first offset slope through calculation; adjusting again the post-initial-adjustment target gain according to the second offset gain to obtain a adjusted target gain; and adjusting a target slope according to the first offset slope to obtain a adjusted target slope. This solution can provide high precision control for the gain and the slope of the optical fiber amplifier.

Claims11

Dependent claims

A control method for controlling a gain and slope of an optical fiber amplifier in an ultra-wideband C+L-band system, comprising:

initially adjusting a target gain of the optical fiber amplifier on the basis of a first offset gain to obtain a post-initial-adjustment target gain;
calculating a second offset gain and a first offset slope of the optical fiber amplifier on the basis of first signal optical power and second signal optical power when actual power of a pump laser reaches target power determined on the basis of the post-initial-adjustment target gain, wherein the second signal optical power is signal optical power when the actual power of the pump laser reaches the target power, and the first signal optical power is signal optical power when the pump laser is turned off;
adjusting again the post-initial-adjustment target gain according to the second offset gain to obtain a adjusted target gain;
and
adjusting a target slope according to the first offset slope to obtain a adjusted target slope.

2 more elements

An optical fiber amplifier in an ultra-wideband C+L-band system comprising:

a controller, a pump laser, and a first photodiode;
wherein
the controller is configured to initially adjust a target gain on the basis of a first offset gain to obtain a post-initial-adjustment target gain;
to calculate a second offset gain and a first offset slope on the basis of first signal optical power and second signal optical power when actual power of the pump laser reaches target power determined on the basis of the post-initial-adjustment target gain;
to adjust again the post-initial-adjustment target gain according to the second offset gain to obtain a adjusted target gain;
and to adjust a target slope according to the first offset slope to obtain a adjusted target slope;
the pump laser is configured to adjust the actual power according to control of the controller;
and
the first photodiode is configured to detect the first optical signal power when the pump laser is turned off, and the second optical signal power when the actual power of the pump laser reaches the target power.

6 more elements

Dependencies are inferred from the claim text.

Control method and optical fiber amplifier

Life of this patent

Control method and optical fiber amplifier

Life of this patent

Abstract

Claims11