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Single-modulation-zone controlled 3X3 multi-mode interference type photoswitch

A multi-mode interference and optical switching technology, applied in the coupling of optical waveguides, can solve the problems of increasing switching loss and crosstalk, increasing the number of modulation areas, prolonging switching time, etc., achieving fewer control electrodes, simple modulation, and The effect of many channels

Inactive Publication Date: 2008-04-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common method to achieve 3×3 switches or more is at the cost of increasing the number of modulation areas and increasing the difficulty of the process. The introduction of additional processes and modulation areas will inevitably increase switching loss and crosstalk, reduce the extinction ratio, and prolong the switching time. Thus greatly affecting the overall switching effect

Method used

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  • Single-modulation-zone controlled 3X3 multi-mode interference type photoswitch
  • Single-modulation-zone controlled 3X3 multi-mode interference type photoswitch

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Effect test

Embodiment 1

[0029] Such as image 3 As shown, the present invention includes a substrate substrate 10, a lower confinement layer 9 and a core layer; the core layer is composed of three input waveguides 1, a multimode waveguide region 2 and three output waveguides 3 connected in series; a single modulation region 4 is located on multimode waveguide zone 2.

[0030] The single modulation area 4 is located at 1 / 3 or 2 / 3 of the longitudinal length of the multimode waveguide area 21 / 3 or 2 / 3 of the longitudinal length, covering adjacent overlapping imaging pixels, and the modulation phase of the two image points by the single modulation area 4 has a doubling relationship.

[0031] The single modulation area 4 uses multiple physical effects of materials to modulate the phase, such as light injection effect, thermo-optic effect, electro-optic effect or carrier injection effect; different modulation methods, different physical effects and appearing at image points The length of the aberration de...

Embodiment 2

[0034] Such as Figure 4 As shown, the present invention includes a substrate substrate 10, a lower confinement layer 9 and a core layer; the core layer is composed of three input waveguides 1, two multimode waveguide regions 2, 5, three connecting waveguides 6, and a tapered transition The waveguide 7 is composed of three output waveguides 3 and a single modulation area 4; the three input ends of the first multimode waveguide 2 are respectively connected to the respective input waveguides 1 through the respective tapered transition waveguides 7, and the three connecting waveguides 6 are respectively connected to the respective input waveguides 1 through the respective two The end tapered transition waveguides 7 are respectively connected to the output end of the first multimode waveguide 2 and the input end of the second multimode waveguide 5, and the three output ends of the second multimode waveguide 5 pass through the respective tapered transition waveguides They are conne...

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Abstract

The present invention refers to multiple mode interference type optical switch, which is composed of series connected three input waveguides, multimode waveguide zone and three output waveguides; or three input waveguides, two multimode waveguide zones, three connection waveguide, taper transition waveguide, three output waveguides and single modulating zone. The present invention realizes optical switch device having simple modulation, multiple number of channels, high extinction ratio, and wide range according to multiple mode interference operating range property and special phase relationship among image points.

Description

technical field [0001] The invention relates to an optical switch device, in particular to a 3*3 multi-mode interference type optical switch controlled by a single modulation area. Background technique [0002] Optical switches are devices that switch or logically operate optical signals in optical transmission lines or integrated optical circuits between one or more selectable transmission ports by using the characteristics of the material itself or external modulation. It is widely used in optical fiber communication, optical interconnection and optical network, optical measurement or sensing and other systems, playing the role of channel switching. Compared with traditional mechanical switches, integrated optical switches have the characteristics of high integration, compact structure, high energy utilization rate, and fast speed. Traditional integrated space-separation optical switches often adopt directional coupling type, MZ interference type and total internal reflec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/35
Inventor 周海峰江晓清郝寅雷杨建义王明华
Owner ZHEJIANG UNIV