Full-wave-band optical circulator

Abstract

The invention discloses a full-wave-band optical circulator. The optical circulator comprises a double-light collimator, a first displacement crystal, a first wave plate group, a first Faraday opticalrotation plate, an angle separation crystal group, a second Faraday optical rotation plate, a second wave plate group, a second displacement crystal and a single-light collimator which are arranged in sequence, the first wave plate group and the second wave plate group are respectively composed of two half-wave plates, the two half-wave plates are arranged up and down, and the optical axis orientation is symmetrical about the horizontal direction. The optical circulator overcomes the defects of a traditional optical circulator, so that the optical circulator works in the whole communication band, and in the whole communication band, the optical circulator has good insertion loss and isolation indexes.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an all-band optical circulator. Background technique [0002] An optical circulator is a multi-port optical device with non-reciprocal characteristics. When the optical signal is input from any port, it can be output from the next port in sequence with a small loss, and the loss of this port leading to all other ports is very large, and it becomes a disconnected port. It is required that the insertion loss between the connected ports of the optical circulator be small (such as 1 to 2dB), and the isolation between the non-communicating ports be large (such as 30dB) [0003] When the optical circulator is applied to a single-fiber bidirectional transmission system, it controls the signal flow direction among the light source, optical fiber, and detector. The realization scheme of the optical circulator is to use the displacement crystal to decompose or synthesize th...

AI Technical Summary

Problems solved by technology

They can only perform well in a small range of wavelengths, but their performance varies greatly in the entire communication band, resulting in degradation of insertion loss and isolation indicators, making optical circulators unable to work in the entire communication band

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