Miniaturized optical circulator

Abstract

The invention relates to a miniaturized optical circulator in the field of optical fiber communication. The miniaturized optical circulator comprises two polarization splitters and a 45-degree faradayrotator. Light signal of the first optical path, after inputting from a common end, is separated into a first polarization component and a second polarization component through a first polarization beam splitter. The first polarization component firstly passes through a 45-degree faraday rotator and is reflected back after reaching the second polarization beam splitter, and at least sequentiallypasses through the 45-degree faraday rotator and the first polarization beam splitter to reach a receiving end. The second polarization component after being separated arrives at the receiving end atleast through one-time reflection of the first polarization beam splitter. Light signal of a second optical path, after being input from the transmitting end, sequentially passes through the second polarization beam splitter, the 45-degree faraday rotating piece and the first polarization beam splitter and is output by a common end. The device is small in size, convenient to integrate and low in cost.

Description

technical field [0001] The patent of the invention belongs to the technical field of optical fiber communication, and specifically relates to a miniaturized optical circulator. Background technique [0002] Optical circulators are usually used in optical communication systems and optical measurement systems. Optical circulators are non-reciprocal optical devices with multi-port input and output. When an optical signal is input from a specified port, it can only be output from another specific port. If the output is not in accordance with the specified port sequence, the device will have a very large loss of optical signal and play a role in isolating the optical signal. [0003] Due to the transmission characteristics of the optical circulator, it becomes an important device in two-way communication. It can be used to separate the forward transmission and reverse transmission optical signals in the same optical fiber to achieve the purpose of single-fiber two-way communicati...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a miniaturized optical circulator, the optical circulator of the present invention uses less optical components, has a small volume, can be integrated into the same small optical component, and the cost is also greatly reduced, thereby solving the current problem There are many optical components used in the optical circulator, the volume is large, it is not easy to integrate, and the problem is that the price is high

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