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Optical switch based on plane waveguide and manufacturing method thereof

A technology of a planar waveguide and a manufacturing method, which is applied in the field of optical fiber communication equipment, can solve the problems of crosstalk between different waveguide branches, reduced device performance, inconsistent phase difference, etc., and achieves the effect of compact structure, small volume, and easy system integration.

Inactive Publication Date: 2016-05-04
SHANGHAI SHENGGUANG PHOTOELECTRIC SCI & TECH
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Problems solved by technology

However, ordinary interference thermo-optical switches have the problem of wavelength sensitivity. When the transmission bandwidth is relatively wide, the phase difference generated by different wavelengths passing through this type of optical switch is inconsistent, which leads to not all wavelengths being on the second arm of the M-Z interferometer. Precisely control on and off, if the wavelength bandwidth is wide, there will be crosstalk between different waveguide branches, which will reduce the performance of the device

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  • Optical switch based on plane waveguide and manufacturing method thereof

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Embodiment

[0056] 1. Determine the core length of the main waveguide 103 and the branch waveguide 104: Calculate the fiber core length according to the selected material, if the first waveguide branch 103A of the main waveguide 103 and the fused silica material of the branch waveguide 104 have a refractive index n1=n3=1.445 , the thermo-optic coefficients at 1310nm and 1550nm are both small A1=A3=0.86*10^-5, the chiral azo polymer refractive index of the second waveguide branch 103C of the main waveguide 103 is material n2=1.479, The thermo-optic coefficients A2 at 1310nm and 1550nm are -10.8*10^-4 and -11.23*10^-4 respectively. Set the temperature rise of the thermal switch to ?T2=50 degrees, the length of the heated polymer waveguide 104 is L2, and the length of the waveguide 103 is L1; in order to realize the half-wavelength phase deviation, formula (1) should be satisfied:

[0057] L2*50*-11.23*10^-4+L1*50*0.86*10^-5=-1550 / 2(4)

[0058] At the same time, in order to achieve the stab...

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Abstract

The invention relates to an optical switch based on a plane waveguide and a manufacturing method thereof. By using the optical switch based on the plane waveguide and the manufacturing method thereof provided in the invention, the structure is compact, the size is small, system integration is convenient, and problems of wavelength sensitivity and temperature sensitivity of an existing optical switch can be simultaneously solved. The optical switch based on the plane waveguide comprises a plane substrate and an M-Z interferometer arranged on the plane substrate. The structure of the optical switch is characterized in that the M-Z interferometer comprises an incident waveguide, 3dB couplers, an emergent waveguide, a main waveguide and a branch waveguide, wherein the main waveguide and the branch waveguide are connected in parallel between the two 3dB couplers; a main waveguide surface is provided with a metal heater; and the main waveguide includes two waveguide branches formed by two kinds of calorescence dispersion coefficient materials.

Description

technical field [0001] The invention relates to an optical switch of a planar waveguide and a manufacturing method thereof, belonging to the field of optical fiber communication equipment. Background technique [0002] Optical Transport Network (OTN) is the current development trend of all-optical networks. The realization of optical networking will depend on the progress of new-generation optical switches, wavelength division multiplexers, optical attenuators and optical amplifiers. The new generation of devices will be characterized by their increased performance in the optical domain and the integration of multiple functions. Among them, the optical switch is a key device to realize the transformation of the optical transmission path, and is widely used in routing selection, wavelength selection, optical cross-connector (OXC), optical add-drop multiplexer (OADM), optical network monitoring, and device testing of the optical layer. and self-healing protection. [0003] T...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/125G02B6/13
CPCG02B6/125G02B6/13
Inventor 康秀杰伏碧德白春龚婧瑶
Owner SHANGHAI SHENGGUANG PHOTOELECTRIC SCI & TECH
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