SOI-based broadband adjustable beam splitting ratio polarization rotary beam splitter

Abstract

The invention discloses an SOI-based broadband adjustable beam splitting ratio polarization rotary beam splitter, which comprises a waveguide layer, a thermode, a buffer layer, an input end and an output end, wherein the waveguide layer comprises three sections of tapering ridge waveguides, an S-shaped bent ridge waveguide, a straight waveguide, an Archimedes spiral bent ridge waveguide, a straight ridge waveguide and an output ridge waveguide, the waveguide layer is prepared from an SOI material, the thermode and the buffer layer are sequentially arranged above the waveguide layer, the thermode is prepared from a TiN material, and the temperature of the thermode can be changed by applying a voltage across the thermode. According to the invention, polarization rotation, beam splitting andbeam splitting ratio adjustment of an input optical signal can be realized, and the beam splitter can be applied to a polarization multiplexing system, a coherent light communication system, optical logic gate design and the like, and has the advantages of low insertion loss, simple process, strong reconfigurability, wide working bandwidth and the like.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an SOI-based broadband adjustable beam splitting ratio polarization rotator beam splitter. Background technique [0002] With the gradual development of informatization, people's demand for information transmission and processing of ultra-high speed, ultra-large capacity and ultra-low power consumption is increasing, which also brings about the vigorous development of modulation technology and multiplexing technology. Various analog modulation techniques and digital modulation techniques have significantly improved the spectral utilization of optical communications. Multiplexing technology can further improve communication capacity on the basis of modulation technology. Among them, polarization multiplexing is to use different polarization states to carry information at the same time for communication. Generally, two orthogonal polarization states are used to carry...

AI Technical Summary

Problems solved by technology

In order to realize the rotation and beam splitting of light, glass and prisms were usually used in the early days, but these two devices are large in size and cannot be integrated, so good alternative materials are required for practical applications

Images