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Multi-functional device based on dual Mach-Zehnder interference structures

An interference structure and multifunctional technology, applied in the coupling of optical waveguides, etc., can solve problems such as high process precision requirements, achieve strong anti-noise performance, achieve high-density integration, and produce effects with large tolerances

Inactive Publication Date: 2012-06-27
ZHEJIANG UNIV
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  • Application Information

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Problems solved by technology

However, because it requires four MZ structures to be cascaded, the implementation requires high process precision.

Method used

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  • Multi-functional device based on dual Mach-Zehnder interference structures
  • Multi-functional device based on dual Mach-Zehnder interference structures
  • Multi-functional device based on dual Mach-Zehnder interference structures

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with drawings and embodiments.

[0020] 1. First, the function of the digital optical switch is described. When a signal is input from the first input waveguide 1A, no signal is input from the second input waveguide 1B. The optical signal is split into two beams by the first multi-mode interferometer 9A, one beam is output from 2A along the phase shift arm 7 to the input port 4A of the multi-mode interferometer 9B, and the other beam enters the nested second beam from 2B A MZ interference structure is output from the third output waveguide 4B through the push-pull modulation of the digital pulse electrical signal 6, and enters the second multimode interferometer 9B, wherein the digital pulse signal is respectively introduced on the phase shift arms 3A and 3B with phase change. At this time, the electric field at the input port 4A of the multimode interferometer 9B and the third output waveguide 4B...

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Abstract

The invention discloses a multi-functional device based on dual Mach-Zehnder interference structures. A second Mach-Zehnder interference structure is sleeved on a phase shift arm of a first Mach-Zehnder interference structure; a digital signal in divided into two paths, wherein one path is loaded on a phase shift arm of the second Mach-Zehnder interference structure, and the other path is loaded on another phase shift arm of the second Mach-Zehnder interference structure through a phase inverter so as to realize the opposite phase change of an absolute value in the same direction according to the push-pull modulation principle and the functions of a digital optical switch and a multi-code pattern modulator of each of inputted different complete devices. The digital optical switch is large in production tolerance, simple in realization and stronger in anti-noise property; and the multi-code pattern modulator simultaneously modulates an upload signal in a network node into two code patterns, i.e. OOK (On-Off Keying) and BPSK (Binary Phase Shift Keying) and is high in speed and compact in structure. In conclusion, the multi-functional device is novel and compact in structure and larger in bandwidth and provides a new choice for the modulation and the switching treatment of a flexible and complicate optical network.

Description

technical field [0001] The invention relates to an optical component, in particular to an optical multifunctional device based on a double Mach-Zehnder interference structure. Background technique [0002] Facing the increasingly flexible and diverse optical networks in the future, advanced modulation codes have attracted extensive attention. Selecting different modulation patterns according to the scale and application of the optical network can optimize performance and save costs. For example, the OOK code pattern is suitable for the optical metropolitan area network and the BPSK code pattern can be applied to the long-distance transmission network. At present, commercial devices can obtain OOK code patterns or BPSK code patterns through a Mach-Zehnder interference structure (MZ) and certain modulation techniques, but cannot generate them simultaneously. In addition, in the optical system network node, Cishuo Yan et al. used semiconductor amplifier (SOA) to realize all-o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/28
Inventor 邵海峰李霞王皖君江晓清杨建义
Owner ZHEJIANG UNIV
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