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A broadband integrated three-way wavelength division multiplexer

A wavelength division multiplexer and broadband technology, applied in the field of integrated optics, can solve problems such as unsatisfactory bandwidth, and achieve the effects of simple structure, low loss, and high isolation

Active Publication Date: 2022-04-22
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: In view of the above-mentioned prior art, a broadband integrated three-way wavelength division multiplexer is proposed, which overcomes the defect of unsatisfactory bandwidth brought about by using a microring resonator to realize the three-way wavelength division multiplexer function

Method used

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Embodiment Construction

[0017] The present invention will be further explained below in conjunction with the accompanying drawings.

[0018] like figure 1 As shown, a broadband integrated three-way wavelength division multiplexer, including a four-port Mach-Zehnder interference structure 5 of a silicon waveguide, two metal microstrips 8 connected to an external power supply as an electrical drive, through direct bonding technology A magneto-optical buffer medium 7 is fabricated on top of the silicon waveguide of the four-port Mach-Zehnder interference structure 5 . The three-way wavelength division multiplexer also includes a waveguide Bragg grating 10 fabricated on one of the ports of the four-port Mach-Zehnder interference structure 5, and a thermosensitive alloy based on an arm of the four-port Mach-Zehnder interference structure 5. Linear Phase Shifter as External Heater 9, and a silicon delay line △L 6 on the other arm. The three-way wavelength division multiplexer of the present invention f...

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Abstract

The invention discloses a broadband integrated three-way wavelength division multiplexer, which includes a four-port MZI structure of a silicon waveguide, two metal microstrips used as electrical drives, and a magneto-optical buffer medium bonded on the top of the four-port MZI silicon waveguide . Among them, the metal microstrip is deposited on the upper surface of the magneto-optical buffer medium, and is located directly above the dual-arm transmission waveguide of the four-port MZI. It also includes a waveguide Bragg grating fabricated on one port of the four-port MZI, a linear phase shifter as an external heater, and a delay line of silicon material arranged on one arm of the MZI structure. The electric current with adjustable direction and magnitude passed through the metal microstrip with integrated electromagnet generates the external magnetic field necessary for the activation of the magneto-optical buffer medium. The structure of the invention is simple and compact. Compared with the traditional three-way device, only one MZI structure is used, the isolation is high, and the crosstalk is small, which overcomes the bandwidth brought by the use of the micro-ring resonator to realize the function of the three-way wavelength division multiplexer. Not ideal defect.

Description

technical field [0001] The invention belongs to the technical field of integrated optics and relates to a broadband three-way multiplexer integrated on a chip. Background technique [0002] Non-reciprocal photonic devices are indispensable and important components in optical communication systems, mainly including isolators and circulators, whose function is to enable unidirectional transmission of light. The isolator is a two-port device, which is mainly used to protect the laser from the interference of unfavorable reverse transmission light. The circulator is a multi-port isolator with similar functional characteristics to the isolator. In recent years, the application of non-reciprocal devices in other fields of optical communication has also been explored and developed. For example, bidirectional multiplexing technology has been realized in optical interconnection, which has improved network capacity in many data center and telecom applications. At the same time, they ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/095G02F1/21G02F1/225G02B6/293H04J14/02
CPCG02F1/095G02F1/21G02F1/225G02B6/29346G02B6/2938H04J14/0202
Inventor 肖金标陈静远
Owner SOUTHEAST UNIV
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