Semiconductor optical amplifier array based on cascade light splitting structure

Abstract

The invention discloses a semiconductor optical amplifier array based on a cascade light splitting structure. The semiconductor optical amplifier array comprises M-stage power dividers, semiconductor optical amplifiers and N-stage power dividers which are connected in sequence. The semiconductor optical amplifier array is placed between the M-stage power dividers and the N-stage power dividers, and the number of the N-stage power dividers corresponds to that of the semiconductor optical amplifiers, so that power amplification of a single waveguide is achieved, and the amplification of the total power of light beams is achieved by selecting the sizes of M and N and optimizing and adjusting the number of the semiconductor optical amplifier array elements. Based on an optical waveguide technology, the semiconductor optical amplifier array has the advantages of being compact in device structure, being easy to integrate at a large scale,being low in cost and the like; according to the semiconductor optical amplifier array, the number of array elements can be optimized and adjusted, the output optical power is effectively increased, the optical power borne by the single waveguide is reduced, and the process implementation difficulty is lowered.

Description

technical field [0001] The invention belongs to the field of photonic integrated devices, and in particular relates to a semiconductor optical amplifier array based on a cascaded light splitting structure. Background technique [0002] The importance of lidar in the field of unmanned driving has become increasingly prominent. Traditional mechanical lidar contains mechanical rotating parts, and is bulky, high in assembly costs, and unfavorable for mass production. It is limited in the application of miniaturized platforms such as vehicles. [0003] After the concept of optical phased array was put forward, it provided a new solution for the realization of all-solid-state lidar. At the same time, silicon-based optoelectronic integration is compatible with CMOS process, can realize large-scale integration, and has low power consumption, low cost, etc. Advantage. Therefore, the on-chip phased array chip based on silicon photonics integration technology will promote the commerci...

AI Technical Summary

Problems solved by technology

[0005] The present invention is based on the requirements of solid-state laser radar, and aims at the urgent problem existing in the current silicon-based optical phased array laser radar: the output optical power is limited by the loss of the optical device on the chip and the maximum acceptable optical power on the chip

A semiconductor optical amplifier can be placed in the optical path to obtain a high-power beam output, but the power method based on a single semiconductor optical amplifier is limited by the problem of saturation power

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