Opto-isolator

Abstract

The invention provides an opto-isolator, whichcomprises a pipe, an isolator core arranged inside the pipe, and an input collimator and an output collimator which are arranged at two ports of the pipe, wherein the isolator core comprises a first magnet ring, a second magnet ring, a third magnet ring and an isolation device; and the isolation device comprises a pair of birefringent chips and a Faraday rotation chip arranged between the pair of birefringent chips. The opto-isolator has a structure that the three magnet rings are combined, so that a magnetic field in a light passing area on the Faraday rotation chip in the isolation device is in a saturated state; and therefore, the radiating capacity of the Faraday rotation chip can be enhanced and heat on the core part of the opto-isolator is more easily dissipated; and moreover, two temperature sources in the opto-isolator are separated by a distance, so that the two temperature sources do not interfere each other, and the heat dissipation of the opto-isolator is facilitated.

Description

technical field [0001] The invention relates to an optical isolator, in particular to a polarization-independent 1064nm 500mW high-power dual-stage optical isolator. Background technique [0002] In the laser system, light will be reflected to different degrees at different optical interfaces during transmission, and these reflected lights will have adverse effects on the light source, optical amplifier and other front-end devices, and then affect the normal operation of the entire system. In order to eliminate the influence caused by the reversely transmitted light and ensure the stable operation of the system, it is necessary to isolate the reversed light, which requires an optical isolator to be connected behind the light source, optical amplifier and other devices. [0003] An optical isolator is a non-reciprocal device, that is, an optical passive device that only allows one-way light to pass through. Its working principle is mainly based on the Faraday effect of magnet...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing optical isolator has too large insertion loss when high-power optical input, and cannot meet the requirements of low forward insertion loss, high reverse isolation, and high return loss of the optical isolator; it provides a Optical isolator, a high-power dual-stage optical isolator that can guarantee its working performance under the optical input of 500 mW power

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