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Holographic grating type 1 multiplying 2 waveguide wave separator and manufacturing method thereof

A holographic grating and manufacturing method technology, applied in the coupling of optical waveguides, optics, instruments, etc., can solve the problems of high coupling and packaging technology requirements, poor isolation, large size, etc., and achieve small volume, reduced size, and high production rate high effect

Inactive Publication Date: 2009-06-24
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fused taper WDM devices are characterized by low insertion loss (maximum value <5dB, typical value 0.2dB), no need for wavelength selective devices, and good optical channel bandwidth / channel spacing ratio and temperature stability. The disadvantages It is slightly larger in size and poor in isolation (about 20dB), so it is generally not used in the current DWDM system
The biggest feature of the diffraction grating device is that it can be reconfigured, which is conducive to system upgrades, but it requires high coupling packaging technology

Method used

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  • Holographic grating type 1 multiplying 2 waveguide wave separator and manufacturing method thereof
  • Holographic grating type 1 multiplying 2 waveguide wave separator and manufacturing method thereof
  • Holographic grating type 1 multiplying 2 waveguide wave separator and manufacturing method thereof

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Effect test

Embodiment 1

[0043] In order to realize the demultiplexing of two channels with wavelengths of 458nm and 633nm, according to the formula (1), the period of the grating should be between 359nm and 496nm (where n 0 = 1, n 1 = 1.55). According to the formula (2), the curve describing the relationship between the incident angle i of the combined wave and the grating period d can be drawn by using the known parameters ( figure 2 ), where the grid area is the effective working area of ​​the holographic grating type wave splitter.

[0044] A glass substrate with a thickness of 1.5mm was selected as a waveguide, and an argon ion laser with a wavelength of 457.9nm was used to adjust the angle of the symmetrical incident coherent light to 62.5° to prepare a holographic grating with a period of 441nm. according to figure 2 , in a plane parallel to the direction of the grating, the combined wave is incident at any angle within the range of 6.6°-25.8° relative to the normal, and the two channels o...

Embodiment 2

[0046] In order to realize the demultiplexing of the two channels of 1310nm and 1550nm, according to the formula (1), the periodic range of the grating should be 1027~1215nm (where n 0 = 1, n 1 = 1.55). Also according to formula (2), known parameters can be used to draw a graph describing the relationship between the incident angle of the combined wave and the grating period ( image 3 ), where the grid area is the effective working area of ​​the holographic grating type wave splitter.

[0047] A glass substrate with a thickness of 1.5mm was selected as a waveguide, and an argon ion laser with a wavelength of 457.9nm was used to adjust the angle of the symmetrical incident coherent light to 24.5° to prepare a holographic grating with a period of 1080nm. according to image 3 , in a plane parallel to the direction of the grating, the combined wave is incident at any angle within the range of 12.3°-19.7° relative to the normal, and the two channels of 1310nm and 1550nm can be...

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Abstract

The invention relates to a holographic grating type 1*2 wave-guide wave separator and a manufacturing method thereof, in particular to a 1*2 wave separator used in the optical telecommunication. The invention aims to provide the holographic grating type 1*2 wave-guide wave separator which has a dual channel, simultaneously serves the functions of the wave separator and a coupler, and has the advantages of low cost, high production rate, small volume and large separation, and the manufacturing method thereof. The holographic grating type 1*2 wave-guide wave separator comprises a wave-guide substrate; and a layer of recording material with a holographic grating structure is arranged on the substrate. The manufacturing method thereof comprises the following steps: applying the recording material on the surface of the substrate; radiating symmetrically by using two beams of plane waves; and exposing and developing. A manufacturing device thereof comprises a laser, a reflecting mirror and a spectroscope; a reflecting light is divided into two beams by the spectroscope and is transmitted to two interference light generating devices; one of the interference light generating devices comprises a completely reflecting mirror, a beam expanding filter and a collimating lens; the interference light reaches the recording materials after passing through the completely reflecting mirror, the beam expanding filter and the collimating lens in sequence; and another interference light generating device is identical completely.

Description

technical field [0001] The invention relates to a 1×2 waveguide splitter applied to optical communication, in particular to a holographic grating type 1×2 waveguide splitter applicable to an integrated optical circuit and a manufacturing method thereof. Background technique [0002] Wavelength Division Multiplexing (WDM) technology is the leading technology for building ultra-high-speed, large-capacity modern communication systems. The WDM transmission system is mainly composed of several main parts such as optical signal transmission and modulation, multiplexer, signal transmission waveguide, wave splitter and signal reception and processing. Among them, the demultiplexer is a key component in the optical communication system, and its performance has a decisive impact on the transmission quality of the system. [0003] The development of optical wavelength division multiplexing devices has gone through several stages such as discrete optical element type, micro-optical sin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/34G03F7/00
Inventor 任雪畅刘守张向苏王灿辉
Owner XIAMEN UNIV