A Hybrid Integrated Three-Port Optical Circulator

Abstract

The invention discloses a hybrid integrated three-port optical circulator, which is composed of five polarization beam splitters, two polarization conversion components each consisting of a half waveplate and an optical rotator, and single mode optical waveguides, wherein the PBSs are prepared by the optical technology, the single-mode optical waveguides between the PBSs are laterally grooved, and the polarization conversion components are inserted, thereby realizing loop transmission of the optical signal between the three ports. In addition, the half wave plate in the polarization conversion component shifts the center wavelength from 1310 nm to 1285 nm, which improves the minimum isolation of the optical circulator in the operating band from 1260 nm to 1340 nm, and optimizes the isolation performance of the entire bandwidth. By adopting the hybrid integrated optical technology, miniaturization and integration of the device are achieved under the premise of ensuring the isolation ofthe optical circulator, and can be conveniently connected with other integrated optical devices, the manufacturing process is also simplified, and the need for wavelength division multiplexing of single-fiber bidirectional transmission modules in a data center is met.

Description

technical field [0001] The invention belongs to the field of optical communication, and more specifically relates to a hybrid integrated three-port optical circulator. Background technique [0002] In the optical fiber communication system, the transmission of reverse light will bring instability to the device and the system. The optical circulator is a non-reciprocal device with multi-port input and output, which makes the optical signal only circulate along a fixed path. It is widely used in optical communication subsystems such as single-fiber bidirectional transmission systems, dispersion compensation units, wavelength blockers, channel equalizers, and wavelength selective switches. [0003] The vigorous development of Internet applications has promoted the large-scale construction of data centers, and high-speed data transmission between data center servers can only be realized through optical fiber interconnection technology. Optical fiber interconnection technology h...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of the prior art, the object of the present invention is to provide a hybrid integrated three-port optical circulator, aiming at solving the problems of traditional optical circulators with large volume, low integration, narrow working bandwidth, and inconvenient use in data centers. question

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