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Polarizer based on guided wave resonance

A guided wave resonance and polarizer technology, applied in the field of polarizers and polarizers with high polarization extinction ratio, can solve problems such as performance differences, limit the application range of devices, and reduce device performance, and achieve low light intensity loss and small insertion loss. , the effect of reducing insertion loss

Inactive Publication Date: 2005-02-23
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these requirements are usually difficult to fully meet in actual mechanical processing and optical applications, which inevitably reduces the performance of the device.
In addition, the design of some prisms requires the light beam to be incident from one side of the prism, and if the light path is reversed by 180 degrees (this is often the case in optical applications), the performance of the device will be lower than that of the normal incidence. big difference
In addition, the bonding of two prisms usually uses materials such as Canada gum, and the absorption of these materials also greatly limits the application range of this type of device.

Method used

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  • Polarizer based on guided wave resonance
  • Polarizer based on guided wave resonance

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The polarizer of the present invention is composed of an elongated prism 1, a bottom metal film 2, a dielectric film 3, and an antireflection film 4, 5, the elongated prism 1, the bottom metal film 2, and the dielectric film 3 are arranged from top to bottom, and the antireflection film 4, 5 Plated on both sides of the elongated prism 1, the metal film 2 on the bottom and the dielectric film 3 form a single-sided metal clad waveguide structure, the dielectric film 3 is the wave guiding layer, and the metal film 2 on the bottom is the cladding layer. The first and second lead-in fiber joints (6, 8) and the first and second lead-out fiber joints (7, 9) lead the laser beam into or out of the polarizer, wherein the first lead-in fiber joint (6), the first lead-out The optical fiber connector (7) is symmetrical with respect to the elongated prism 1, and the second leading-in optical fiber connector (8) and the second deriving optical fiber connector (9) are symmetrical with r...

Embodiment 2

[0031] The polarizer of the present invention is composed of an elongated prism 1, a bottom metal film 2, a dielectric film 3, and an antireflection film 4, 5, the elongated prism 1, the bottom metal film 2, and the dielectric film 3 are arranged from top to bottom, and the antireflection film 4, 5 Plated on both sides of the elongated prism 1, the metal film 2 on the bottom and the dielectric film 3 form a single-sided metal clad waveguide structure, the dielectric film 3 is the wave guiding layer, and the metal film 2 on the bottom is the cladding layer. The first and second lead-in fiber joints (6, 8) and the first and second lead-out fiber joints (7, 9) lead the laser beam into or out of the polarizer, wherein the first lead-in fiber joint (6), the first lead-out The optical fiber connector (7) is symmetrical with respect to the elongated prism 1, and the second leading-in optical fiber connector (8) and the second outgoing optical fiber connector (9) are symmetrical with r...

Embodiment 3

[0036] The polarizer of the present invention is composed of an elongated prism 1, a bottom metal film 2, a dielectric film 3, and an antireflection film 4, 5, the elongated prism 1, the bottom metal film 2, and the dielectric film 3 are arranged from top to bottom, and the antireflection film 4, 5 Plated on both sides of the elongated prism 1, the metal film 2 on the bottom and the dielectric film 3 form a single-sided metal clad waveguide structure, the dielectric film 3 is the wave guiding layer, and the metal film 2 on the bottom is the cladding layer. The first and second lead-in fiber joints (6, 8) and the first and second lead-out fiber joints (7, 9) lead the laser beam into or out of the polarizer, wherein the first lead-in fiber joint (6), the first lead-out The optical fiber connector (7) is symmetrical with respect to the elongated prism 1, and the second leading-in optical fiber connector (8) and the second outgoing optical fiber connector (9) are symmetrical with r...

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Abstract

The invention is a polarizer based on wave-guide resonance. It consists of lengthened prism, underside metal film, medium film and transmission-increasing film, and uses the metal film and the medium film to form single-side metal-enveloping wave-guide construction and adopts the medium film as wave-guide layer and the metal film as envelope layer. It leads in the laser beam through the fibre-optical joint, makes the beam irradiate at the angle of wave-guide resonance, many times excites the resonance on the basal plane of lengthened prism in order plated with metal and medium films for getting rid of S or P wave and only leaving P or S wave, which realizes the high polarization.

Description

technical field [0001] The invention relates to a polarizer for generating polarized light, in particular to a polarizer with high polarization extinction ratio based on guided wave resonance in an elongated prism, belonging to the field of optoelectronic communication and optical information processing. Background technique [0002] In the past two decades, with the development of laser technology, especially optical communication technology, the research and application of optical polarization devices have made great progress. Among them, the most common one is the polarizing device made by bonding birefringent prisms using the birefringence effect in the crystal, and this type of device is widely used in practice, and there are many reports on it. After literature search, it was found that US Patent No. 5,440,424 proposed a polarizing device made by bonding birefringent prisms. In this device, a total of seven birefringent prisms are bonded to realize their functions. F...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/126G02B6/27G02F1/01
Inventor 陈洸曹庄琪李翔刘选斌沈启舜
Owner SHANGHAI JIAOTONG UNIV
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