optical amplifier

Abstract

The application provides an optical amplifier, including a light source. A multimode waveguide on one side of the light source. The splitter, the splitter has an incident end and an exit end, the incident end is connected to the multimode waveguide, and the splitter is used to divide the multimode light into multiple groups of few mode light. A plurality of few-mode waveguides, the plurality of few-mode waveguides are connected to the exit end, each few-mode waveguide includes a first part connected to a second part, and the second part is connected to the exit end. Single-mode waveguide, the single-mode waveguide is close to the first part, and the gap between the first part and the single-mode waveguide is arranged; the first part and the single-mode waveguide can form a wave combiner, and the wave combiner is used to couple the few-mode light in the first part to the single-mode waveguide Inside. The optical amplifier provided by the present application can use the multi-mode waveguide to receive light with poor beam quality, and couple the light to the single-mode waveguide through a splitter and multiple few-mode waveguides to achieve the purpose of optical amplification. Therefore, the present application can use a light source with poor beam quality, thereby reducing the cost of the optical amplifier.

Description

technical field [0001] The present application belongs to the technical field of optical communication, and specifically relates to an optical amplifier. Background technique [0002] Optical amplifier is a key device in high-speed optical communication system, and it is also one of the important optical devices for miniaturization and integration of optical devices in the future. Existing optical amplifiers mainly use rare-earth element-doped optical fibers or optical waveguides and high-power pump light sources, and the pump light source usually uses a single-mode semiconductor laser light source, but this light source is expensive, which increases the overall cost of the optical amplifier. . If an inexpensive multi-mode light source is used, such as a light-emitting diode, there are problems such as poor beam quality and low coupling efficiency of the waveguide, and its energy cannot be fully and effectively utilized. SUMMARY OF THE INVENTION [0003] In view of this,...

AI Technical Summary

Problems solved by technology

Existing optical amplifiers mainly use rare-earth element-doped optical fibers or optical waveguides and high-power pump light sources, and the pump light sources usually use single-mode semiconductor laser light sources, but this light source is expensive, which increases the overall cost of the optical amplifier.

If a cheap multi-mode light source is used, such as a light-emitting diode, there are problems such as poor beam quality and low waveguide coupling efficiency, and its energy cannot be fully and effectively utilized

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