Optical amplification device and optical repeater

Abstract

The embodiment of the invention discloses an optical amplification device and an optical repeater, relating to the field of fiber-optical communication. For solving the problem of lower gain of signal light, a technical scheme provided by the embodiment of the invention is as follows: an optical coupler is connected with a first er-doped fiber which is connected with a combiner; the combiner is connected with a second er-doped fiber; the optical coupler is also directly connected with the combiner; the received input signal light is coupled with a part of the received pump light by the optical coupler, and the coupled input signal light and pump light is output to the first er-doped fiber; the rest part of the pump light is output to the combiner; and the signal light output by the first er-doped fiber and the pump light output by the optical coupler are coupled by the combiner. The embodiment of the invention is suitable for the field of the fiber-optical communication.

Description

technical field [0001] The invention relates to the field of optical fiber communication, in particular to an optical amplification device and an optical repeater. Background technique [0002] In optical fiber communication systems, the optical repeater is usually composed of Erbium-Doped Fiber Amplifier (EDFA), which at least includes pump laser (Pump Laser) and its driving circuit, wavelength division multiplexer (Wavelength Division Multiplexer) , WDM) and Erbium-doped fiber. Among them, the role of the pump laser is to provide excitation energy for the gain medium. A wavelength division multiplexer, also known as a multiplexer, is used to couple pump light and signal light into the same optical fiber for propagation. Erbium-doped fiber (Erbium-Doped Fiber, EDF) is the gain medium of the erbium-doped fiber amplifier. After absorbing the pump light, the erbium ions will transition to the excited state. Photons with the same frequency, same direction, and same polarizat...

AI Technical Summary

Problems solved by technology

[0005] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: the residual pump light power after passing through the first-stage amplifier is relatively low, and the output power of the second-stage amplifier cannot be effectively increased, and the output power of the signal light is relatively low. low gain

Images