Four-port circulator with multiple isolators and coherent BIDI optical module

Abstract

The invention relates to the technical field of circulators, and provides a four-port circulator with multiple isolators, the four-port circulator comprises four ports, one port is an entrance port, one port is a compatible port with both input and output, the other two ports are emergent ports, and the isolators are arranged at the two emergent ports; optical signals incident from the incident port are emitted from the compatible port, and optical signals incident from the compatible port are respectively emitted from the two emergent ports. The invention further provides a coherent BIDI optical module which comprises the four-port circulator with multiple isolators. Compared with a three-port circulator, the four-port circulator has more port output, transmission of one more optical path is achieved, and therefore application of the coherent technology is achieved. The magnetic block is adopted to replace a magnetic ring, so that all devices can be borne, the assembly difficulty is reduced, the size is reduced, the reliability is improved, and the performance is more stable.

Description

technical field [0001] The invention relates to the technical field of circulators, in particular to a four-port circulator with multiple isolators and an optical module. Background technique [0002] Most existing optical modules transmit data through two optical fibers, one of which is used to receive data from a network device, and the other optical fiber is used to transmit data to the network device. There is also a WDM BiDi optical module, which can realize output transmission with one optical fiber. However, when this optical module is used, the filter wavelengths must be complementary to each other, and the operating wavelengths of the two BiDi optical modules must also be complementary. And consistent, there are restrictions on the use. Coherent detection technology requires multi-channel modulation and demodulation balance detection combination, and ordinary 3-port circulators cannot realize more channels of optical transmission, which limits the realization of co...

AI Technical Summary

Problems solved by technology

There is also a WDM BiDi optical module, which can realize output transmission with one optical fiber. However, when this optical module is used, the filter wavelengths must be complementary to each other, and the operating wavelengths of the two BiDi optical modules must also be complementary. and consistent, there are restrictions on the use

Coherent detection technology requires a multi-channel modulation and demodulation balance detection combination, ordinary 3-port circulators cannot achieve more channels of optical transmission, and the realization of coherent detection is limited

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