CN201518071U - 一种可调滤波器 - Google Patents

一种可调滤波器 Download PDF

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CN201518071U
CN201518071U CN2009202063090U CN200920206309U CN201518071U CN 201518071 U CN201518071 U CN 201518071U CN 2009202063090 U CN2009202063090 U CN 2009202063090U CN 200920206309 U CN200920206309 U CN 200920206309U CN 201518071 U CN201518071 U CN 201518071U
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signal
catoptron
adjustable filter
grating
filter
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方洋
陈彬
张川
谢红
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O Net Technologies Shenzhen Group Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/002—Optical devices or arrangements for the control of light using movable or deformable optical elements the movement or the deformation controlling the frequency of light, e.g. by Doppler effect
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
    • G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
    • G02B6/29311—Diffractive element operating in transmission
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/12—Generating the spectrum; Monochromators
    • G01J2003/1213—Filters in general, e.g. dichroic, band
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
    • G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
    • G02B6/29307—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide components assembled in or forming a solid transparent unitary block, e.g. for facilitating component alignment
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
    • G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
    • G02B6/29313—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide characterised by means for controlling the position or direction of light incident to or leaving the diffractive element, e.g. for varying the wavelength response
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
    • G02B6/29395—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device configurable, e.g. tunable or reconfigurable

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Abstract

本实用新型提供一种可调滤波器，包括信号输入端，信号输出端，聚焦元件，光栅，其特征在于：该可调滤波器还包括第一反射镜、第二反射镜以及第三反射镜，从信号输入端输入的光信号经过聚焦元件转换为平行光信号，该平行光信号射入光栅表面经衍射后，依次经过第一反射镜和第二反射镜的反射后再次射入光栅，经过第二次衍射后照射到第三反射镜，转动任一反射镜选择任一波长光信号反射后，光信号按照原路返回，并最终输入至信号输出端；使用该可调滤波器可有效的减小滤波器的尺寸，降低制造成本。

Description

一种可调滤波器
技术领域
本实用新型涉及一种可调滤波器，特别是一种小型化可调滤波器。
背景技术
光滤波器是用来进行波长选择的仪器，它可以从众多的波长中挑选出所需的波长，而除此波长以外的光将会被拒绝通过。作为一种波长选择器件，光滤波器在光纤通信系统中发挥着越来越重要的作用。
图3为目前100GHZITU波长的光信号的可调谐光滤波器10的光路图，如图3所示：该可调谐光滤波器10包括信号输入端113，信号输出端111，聚焦元件13，光栅15以及一个反射镜17，从信号输入端113输入的光信号经过聚焦元件13转换为平行光信号，该平行光信号射入光栅15表面经光栅15衍射后，射入反射镜17，经反射镜17反射后按原路返回，并最终输入至信号输出端111。通过旋转光栅15或者反射镜17，使其该光信号从信号输入端113输入到最后进入信号输出端111，中间两次通过光栅15。
如果50GHZ ITU波长的光信号的可调滤波器采用上述100GHZ ITU波长的光信号的可调滤波器相同的光路结构，会导致所用的透镜直径更大，并且在反射转镜上的光斑尺寸也会变大，相应的反射转镜直径也必须加大，光斑尺寸增加导致光栅尺寸也会相应增大。而透镜、转镜以及光栅的直径增大必然导致器件整体高度增加，这不但会导致器件的通用性下降，而且最终器件的整体成本会高出100GHZ ITU波长的光信号的可调滤波器很多。
实用新型内容
鉴于此，有必要提供一种小型化、方便调节的可调滤波器。
一种可调滤波器，包括信号输入端，信号输出端，聚焦元件，光栅，其特征在于：该可调滤波器还包括第一反射镜、第二反射镜以及第三反射镜，从信号输入端输入的光信号经过聚焦元件转换为平行光信号，该平行光信号射入光栅表面经衍射后，依次经过第一反射镜和第二反射镜的反射后再次射入光栅，经过第二次衍射后照射到第三反射镜，转动任一反射镜选择任一波长光信号反射后，光信号按照原路返回，并最终输入至信号输出端。
其中，优选方案为：所述第一反射镜和第二反射镜为分别镀于一棱镜的两个面上的高反射膜层，设置第三反射镜为转动镜。
其中，优选方案为：所述棱镜与光栅平行的一面镀有一层增透膜。
其中，优选方案为：所述光栅为透射式光栅。
其中，优选方案为：所述聚焦元件为透镜组。
其中，优选方案为：所述信号输入端和信号输出端为双光纤结构，其中一根光纤为信号输入端，另一根光纤为信号输出端。
其中，优选方案为：所述双光纤之间的间距可调。
其中，优选方案为：所述反射镜由微转动器控制转动角度。
其中，优选方案为：所述微转动器依次连接驱动单元和控制单元，所述控制单元输入电压大小信号到驱动单元，驱动单元根据所接收到的电压大小信号控制微转动器的转动角度大小。
由于采用了上述可调滤波器，有效的减小了滤波器的尺寸，降低了制造成本。
附图说明
下面接合附图对本实用新型的实施例进一步说明：
图1为现有技术可调滤波器的光路图。
图2为本实用新型一种可调滤波器第一实施例的光路图。
图3为本实用新型一种可调滤波器第二实施例的光路图。
具体实施方式
下面结合附图对本实用新型作进一步说明。
如图2所示，为本实用新型一种可调滤波器第一实施例的光路图，该可调滤波器20，包括信号输入端213，信号输出端211，聚焦元件21，光栅22，该可调滤波器还包括一第一反射镜23，一第二反射镜24以及一第三反射镜25，该第三反射镜25依次连接微转动器26、驱动单元27和控制单元28；该信号输入端213用于输入50GHZ ITU波长的光信号；该信号输出端211用于接收经过选择后的所需波长的光信号；该聚焦元件21为透镜组，用于将输入光信号转化成平行光信号，和将平行光信号聚焦到信号输出端211的纤芯；该光栅22为透射式光栅，用于使光信号发生衍射；该第三反射镜25用于根据需要调整到合适的角度来选择所需波长的光信号；该微转动器26用来控制转动角度大小；该控制单元28用于输入电压大小信号到驱动单元27，该驱动单元27用于根据所接收到的电压大小信号控制微转动器26的转动角度大小。
使用时，从信号输入端输入的光信号经过聚焦元件21转换为平行光信号，该平行光信号射入光栅21表面经光栅21衍射，衍射后的光信号依次经过第一反射镜23和第二反射镜24的反射后再次经过光栅22，经过光栅22的第二次衍射后照射到第三反射镜25，由第三反射镜25选择任一波长光信号反射后，光信号按照原路返回，并最终输入至信号输出端211。该光信号从信号输入端213输入到最后进入信号输出端211，中间4次通过光栅22。
上述实施例中，信号输入端213和信号输出端211可采用双光纤尾纤形式，其中一根光纤端为信号输入端213，另一根光纤端为信号输出端211，并且所述双光纤之间的间距可调。在本实施例中，双光纤的中心距为125μm。
如图3所示，为本实用新型一种可调滤波器第二实施例的光路图，该可调滤波器30，包括信号输入端313，信号输出端311，聚焦元件32，光栅33，棱镜34，该棱镜34的三个面上分别镀有第一高反射膜343、第二高反射膜345、增透膜341，其中镀有增透膜341的面与光栅33平行，或者光栅33直接固定在镀有增透膜341的面上；该可调滤波器30还包括一第三反射镜35，该第三反射镜35依次连接微转动器36、驱动单元37和控制单元38；该信号输入端313用于输入50GHZ ITU波长的光信号；该信号输出端311用于接收经过选择后的所需波长的光信号；该聚焦元件32为透镜组，用于将输入光信号转化成平行光信号，和将平行光信号聚焦到信号输出端311的纤芯；该光栅33为透射式光栅，用于使光信号发生衍射；该第三反射镜35用于根据需要调整到合适的角度来选择所需波长的光信号；该微转动器36用来控制转动角度大小；该控制单元38用于输入电压大小信号到驱动单元37，该驱动单元37用于根据所接收到的电压大小信号控制微转动器36的转动角度大小。
使用时，从信号输入端313输入的光信号经过聚焦元件32转换为平行光信号后输入，该平行光信号射入光栅33表面经光栅衍射后透过增透膜341后进入棱镜34，并依次经过棱镜34上的第一反射膜343和第二反射膜345的反射后再次透过增透膜341射出棱镜34，并再次射入光栅33，经过光栅33的第二次衍射后照射到第三反射镜35，由第三反射镜35选择任一波长光信号反射后，光信号按照原路返回，并最终输入至信号输出端311。该光信号从信号输入端313输入到最后进入信号输出端311，中间4次通过光栅33。
上述实施例中，信号输入端313和信号输出端311可采用双光纤尾纤形式，其中一根光纤端为信号输入端313，另一根光纤端为信号输出端311，并且所述双光纤之间的间距可调。在本实施例中，双光纤的中心距为125μm。
使用该可调滤波器可大大减小滤波器的尺寸，降低了制造成本。
尽管结合优选实施方案具体介绍了本实用新型，但所属领域的技术人员应该明白，在不脱离所附权利要求书所限定的本实用新型的精神和范围内，在形式上和细节上可以对本实用新型做出各种变化，均为本实用新型的保护范围。

Claims (9)

1.一种可调滤波器，包括信号输入端，信号输出端，聚焦元件，光栅，其特征在于：该可调滤波器还包括第一反射镜、第二反射镜以及第三反射镜，从信号输入端输入的光信号经过聚焦元件转换为平行光信号，该平行光信号射入光栅表面经衍射后，依次经过第一反射镜和第二反射镜的反射后再次射入光栅，经过第二次衍射后照射到第三反射镜，转动任一反射镜选择任一波长光信号反射后，光信号按照原路返回，并最终输入至信号输出端。
2.如权利要求1所述的可调滤波器，其特征在于：所述第一反射镜和第二反射镜为分别镀于一棱镜的两个面上的高反射膜层，设置第三反射镜为转动镜。
3.如权利要求2所述的可调滤波器，其特征在于：所述棱镜与光栅平行的一面镀有一层增透膜。
4.如权利要求1或2所述的可调滤波器，其特征在于：所述光栅为透射式光栅。
5.如权利要求1或2所述的可调滤波器，其特征在于：所述聚焦元件为透镜组。
6.如权利要求1或2所述的可调滤波器，其特征在于：所述信号输入端和信号输出端为双光纤结构，其中一根光纤为信号输入端，另一根光纤为信号输出端。
7.如权利要求1或2所述的可调滤波器，其特征在于：所述双光纤之间的间距可调。
8.如权利要求1或2所述的可调滤波器，其特征在于：所述反射镜由微转动器控制转动角度。
9.如权利要求8所述的可调滤波器，其特征在于：所述微转动器依次连接驱动单元和控制单元，所述控制单元输入电压大小信号到驱动单元，驱动单元根据所接收到的电压大小信号控制微转动器的转动角度大小。
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CN102323668A (zh) * 2011-09-13 2012-01-18 武汉朗睿科技有限公司 一种集成角度传感器的可调谐滤波器
CN105866940A (zh) * 2016-05-11 2016-08-17 昂纳信息技术（深圳）有限公司 一带宽及波长可调的光滤波器
CN105866941A (zh) * 2016-05-11 2016-08-17 昂纳信息技术（深圳）有限公司 一种带宽及波长可调的光滤波器
CN114499681A (zh) * 2021-12-09 2022-05-13 武汉光迅科技股份有限公司 一种可调谐光滤波器和光滤波方法

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