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Multimode interference heat optical switch

A thermo-optical switch and multi-mode interference technology, applied in the field of photonic communication, can solve the problems of large crosstalk, polarization sensitivity, high dimensional accuracy, etc., and achieve the effect of optimizing design and reducing power consumption

Inactive Publication Date: 2008-05-28
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of the switch of the MZI structure is that it is sensitive to polarization and requires high dimensional accuracy; the MMI structure is currently mainly used in combination with the MZI structure, and the above problems also exist; while the switch of the Y-type or X-type branch structure has Disadvantages such as large crosstalk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] Embodiment: use the beam propagation method (BPM) to numerically simulate the multimode interference thermo-optic switch. (Using Beampro professional waveguide optical design software from American Rsoft Company)

[0024] 1. Parameter setting: such as figure 1 , as shown in 2, the material of the waveguide is polymer PPMA, the thickness of the lower cladding layer 9 is 10 μm, the thickness of the waveguide layer 8 is 5 μm, and the thickness of the upper cladding layer 7 is 6 μm; the refractive index of the cladding layer is 1.5, and the refractive index of the waveguide layer is 1.51; the thermo-optic coefficient of the upper and lower cladding is -1.47×10 -4 , the thermo-optic coefficient of the waveguide layer is -1.22×10 -4 The thermal electrode is made of nickel-chromium alloy with a thickness of 0.01μm and a resistivity of 1.5Ω / μm; the thermal conductivity of the waveguide material is 0.01W / (cm.K), and the thermal conductivity of the silicon wafer is 1.3W / (cm.K) ...

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Abstract

The invention belongs to the field of optical communication technology. In the concrete, it relates to a multimode interference thermo-optical switch. Said switch is formed from a sinle-mode input waveguide, a multimode interference coupling waveguide, an off-state single-mode ouput waveguide, an on-state single-mode. out put waveguide, top layer thermal electrode and power supply which are successively combined. Said invention alsoprovides its working principle and concrete method steps for implementing on-off conversion of said switch. Said invention is compact in structure, and said invented device and be used as optical attenuator for use.

Description

technical field [0001] The invention belongs to the technical field of photon communication, and in particular relates to a multi-mode interference thermo-optic switch. Background technique [0002] The next development direction of optical fiber communication technology is the all-optical network (AON) of free wavelength, which is characterized by the wide application of optical add-drop multiplexing (OADM) and optical switching interconnection (OXC). As the core components of OADM and OXC, optical The role of switching is becoming more and more prominent. At present, there are many types of optical switches, mainly micromechanical (MEMS) switches and waveguide switches, and the technology is relatively mature. MEMS switches have obvious advantages in performance such as loss and crosstalk, but the switching speed is slow, and the mechanical wear of MEMS is relatively large, and waveguide switches can make up for these shortcomings. In terms of modulation mechanism, waveg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/35G02F1/01
Inventor 吴翔徐雷刘丽英王文澄
Owner FUDAN UNIV
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