CN102401947A - 单纤器件 - Google Patents
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- CN102401947A CN102401947A CN2011103739897A CN201110373989A CN102401947A CN 102401947 A CN102401947 A CN 102401947A CN 2011103739897 A CN2011103739897 A CN 2011103739897A CN 201110373989 A CN201110373989 A CN 201110373989A CN 102401947 A CN102401947 A CN 102401947A
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- 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4246—Bidirectionally operating package structures
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- 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
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2746—Optical coupling means with polarisation selective and adjusting means comprising non-reciprocal devices, e.g. isolators, FRM, circulators, quasi-isolators
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
- G02F1/095—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect in an optical waveguide structure
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- 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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12083—Constructional arrangements
- G02B2006/12116—Polariser; Birefringent
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- 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
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
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- 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
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2706—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters
- G02B6/2713—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters cascade of polarisation selective or adjusting operations
- G02B6/272—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters cascade of polarisation selective or adjusting operations comprising polarisation means for beam splitting and combining
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- 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
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
- G02B6/2773—Polarisation splitting or combining
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- 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
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
- G02B6/278—Controlling polarisation mode dispersion [PMD], e.g. PMD compensation or emulation
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- 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
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
- G02B6/2793—Controlling polarisation dependent loss, e.g. polarisation insensitivity, reducing the change in polarisation degree of the output light even if the input polarisation state fluctuates
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- 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4207—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback
- G02B6/4208—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback using non-reciprocal elements or birefringent plates, i.e. quasi-isolators
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- 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4213—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being polarisation selective optical elements
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- 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
- G02F1/095—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect in an optical waveguide structure
- G02F1/0955—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect in an optical waveguide structure used as non-reciprocal devices, e.g. optical isolators, circulators
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Abstract
本发明公开了一种单纤器件,涉及光通信技术领域,达到较大的发射光功率及接受灵敏度。该单纤器件,包括用于接收入射光的第一光电二极管和用于发射出射光的激光二极管,还包括:具有一正方向的同波长分光器,包括沿正方向依次设置且垂直于正方向的第一双折射片、半波片、45°法拉第旋转片以及与第一双折射片相同的第二双折射片;第一双折射片的光轴与正方向之间的夹角为α,0°<α<90°;半波片的e轴与第一双折射片主截面之间的角度为β,β=67.5°或β=22.5°;入射光沿正方向通过同波长分光器;出射光沿与正方向相反的方向通过同波长分光器;出射光为偏振方向垂直于第一双折射片的主截面的线偏振光。
Description
技术领域
本发明涉及光通信技术领域,尤其涉及一种单纤器件。
背景技术
目前,在无源光纤网络(Passive Optical Network,PON)系统中,同波长单纤双向的收发,也就是相同波长的光通过同一个光纤实现接收和发射光路的分离是一个比较难解决的问题。现有技术如图1所示,滤波片为部分透过部分反射滤波片,使得一个方向上的光直接透射通过滤波片,而另一个方向上的光在滤波片处反射,从而改变光路,进而使相同波长的光通过同一个光纤实现接收和发射光路的分离。
然而,使用部分透过部分反射滤波片,会损失光器件的发射光功率及接收灵敏度。
发明内容
本发明的实施例提供一种单纤器件,达到较高的发射光功率及接收灵敏度。
为解决上述技术问题,本发明的实施例采用如下技术方案:
一种单纤器件,包括用于接收入射光的第一光电二极管和用于发射出射光的激光二极管,还包括:
具有一正方向的同波长分光器,包括沿所述正方向依次设置且垂直于所述正方向的第一双折射片、半波片、45°法拉第旋转片以及与所述第一双折射片相同的第二双折射片;
所述第一双折射片的光轴与所述正方向之间的夹角为α,0°<α<90°;
所述半波片的e轴与所述第一双折射片主截面之间的角度为β,β=67.5°或β=22.5°;
所述入射光沿所述正方向通过所述同波长分光器;
所述出射光沿与所述正方向相反的方向通过所述同波长分光器;
所述出射光为偏振方向垂直于所述第一双折射片的主截面的线偏振光。
通过上述同波长分光器,可实现接收和发射光路的分离,与现有技术相比,无需使用部分透射部分反射滤波片,从而实现同波长单纤双向理论上的无损传输,达到较高的发射光功率及接收灵敏度。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为现有技术中部分透过部分反射滤波片实现光路分离的示意图;
图2为本发明实施例一中一种单纤器件的示意图;
图3为图2中出射光的光路示意图;
图4为本发明实施例二中一种单纤器件的示意图;
图5为本发明实施例三中一种单纤器件的示意图;
图6为本发明实施例四中一种单纤器件的示意图;
图7为本发明实施例四中另一种单纤器件的示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例一
本发明实施例提供一种单纤器件,如图2所示,包括用于接收入射光21的第一光电二极管2(Photo Diode,PD)和用于发射出射光的激光二极管3(LaserDiode,LD),还包括:具有一正方向(即z轴正向)的同波长分光器1,包括沿正方向(即z轴正向)依次设置且垂直于正方向(即z轴)的第一双折射片11、半波片12、45°法拉第旋转片13以及与第一双折射片11相同的第二双折射片14;第一双折射片11的光轴与正方向(即z轴正向)之间的夹角为α,0°<α<90°;半波片12的e轴与第一双折射片11主截面(即zy平面)之间的角度为β,β=67.5°或β=22.5°。
以下以β=67.5°为例介绍入射光与出射光光路的分离原理,此时45°法拉第旋转片13对应设置为:从z轴正向看,使通过45°法拉第旋转片13的线偏振光的偏振方向顺时针旋转45°。一方面,入射光21沿正方向(即z轴正向)通过同波长分光器1;入射光21为任意偏振态的光线,经过第一双折射片11时分解为正交的两束线偏振光,其中一束为偏振方向垂直于yz平面的o光,另一束为偏振方向平行于yz平面的e光,o光直接通过第一双折射片11,而e光偏移一定距离后通过第一双折射片11,经过半波片12时,o光与e光的偏振方向分别变为与半波片12的e轴对称的方向,即从z轴正向看,o光与e光的偏振方向都顺时针旋转了45°,从z轴正向看,o光与e光经过45°法拉第旋转片13后,偏振方向都顺时针旋转45°;即o光的偏振方向一共旋转了90°,变为平行于yz平面的光,e光的偏振方向一共旋转了90°,变为垂直于yz平面的光,在经过第二双折射片14时,由于第二双折射片14与第一双折射片11相同,其光轴与正方向(即z轴正向)之间的夹角同样为α,e光直接通过第二双折射片14,而o光偏移一定距离后与e光合为入射光21,从而改变了沿正方向通过同波长分光器1的入射光21的光路。
另一方面,如图3所示,激光二极管3发射的出射光31沿与正方向相反的方向(即z轴的负方向)通过同波长分光器1;出射光31为偏振方向垂直于第一双折射片的主截面(即yz平面)的线偏振光。出射光31直接通过第二双折射片14,经过45°法拉第旋转片13后,从z轴正向看,出射光31的偏振方向顺时针旋转了45°,经过半波片12时,出射光31的偏振方向变为与半波片12的e轴对称的方向,即从z轴正向看,出射光31的偏振方向逆时针旋转了45°。即出射光31的偏振方向又变为垂直于yz平面,之后直接通过第一双折射片11。沿与正方向相反的方向通过同波长分光器1的出射光31的光路没有改变。
与上述半波片12的e轴与第一双折射片11主截面(即zy平面)之间的角度β=67.5°时类似,当β=22.5°时,45°法拉第旋转片13对应设置为:从z轴正向看,使通过45°法拉第旋转片13的线偏振光的偏振方向逆时针旋转45°。o光与e光经过半波片12后,从z轴正向看,o光与e光的偏振方向都逆时针旋转了45°,45°法拉第旋转片13对应β=22.5°设置,从z轴正向看,使o光与e光经过45°法拉第旋转片13后,偏振方向都逆时针旋转了45°。同样使o光的偏振方向一共旋转90°,变为平行于yz平面的光,e光的偏振方向一共旋转90°,变为垂直于yz平面的光,从而改变了沿正方向通过同波长分光器1的入射光21的光路。另一方面,出射光31直接通过第二双折射片14,经过45°法拉第旋转片13后,从z轴正向看,出射光31的偏振方向逆时针旋转了45°,经过半波片12时,出射光31的偏振方向变为与半波片12的e轴对称的方向,即从z轴正向看,出射光31的偏振方向顺时针旋转了45°,同样使出射光31的偏振方向又变为垂直于yz平面,之后直接通过第一双折射片11。沿与正方向相反的方向通过同波长分光器1的出射光31的光路没有改变。
综上所述,在光纤和LD与PD之间设置上述同波长分光器,可实现接收和发射光路的分离,与现有技术相比,无需使用部分透射部分反射滤波片,从而实现同波长单纤双向理论上的无损传输,达到较高的发射光功率及接收灵敏度。
实施例二
基于实施例一,本发明实施例提供一种单纤器件,如图4所示,还包括:收发管芯4(Transistor Outline,TO),用于将第一光电二极管2和激光二极管3封装在一起。同波长分光器1的结构与原理与实施例一相同,在此不再赘述。优选地,上述第一双折射片的光轴与正方向之间的夹角α=47.85°,使入射光偏移的距离较大。
实现将LD和PD封装在同一个TO中的单纤双向器件,并且通过上述同波长分光器,可实现接收和发射光路的分离,与现有技术相比,无需使用部分透射部分反射滤波片,从而实现同波长单纤双向理论上的无损传输,达到较高的发射光功率及接收灵敏度。并且由于不需要滤波片,从而减少了反射产生杂散光带来的光串扰。
实施例三
基于实施例一,本发明实施例提供一种单纤器件,如图5所示,还包括:设置在第一光电二极管2与同波长分光器1之间的入射光光路上的反射镜5,用于反射通过同波长分光器1的入射光,使第一光电二极管2接收入射光;第一接收管芯22,用于封装第一光电二极管2;发射管芯32,用于封装激光二极管3。同波长分光器1的结构与原理与实施例一相同,在此不再赘述。
实现了同波长单纤双向光器件(Bi-Direction Optical Sub-Assembly,BOSA),并且通过上述同波长分光器,可实现接收和发射光路的分离,与现有技术相比,无需使用部分透射部分反射滤波片,从而实现同波长单纤双向理论上的无损传输,达到较高的发射光功率及接收灵敏度。
实施例四
基于实施例二或实施例三,本发明实施例提供一种单纤器件,如图6所示,还包括:第二光电二极管6,用于接收特定波长的光;特定波长滤波片61,用于使特定波长的光反射,其他波长的光透射;第二接收管芯62,用于封装第二光电二极管6;特定波长滤波片61和同波长分光器1沿正方向依次设置。其他结构与实施例二相同,或者如图7所示,与实施例三相同。光纤7传输的特定波长的光在特定波长滤波片61处反射,至第二光电二极管6处被接收,而另外的同波长的光直接通过特定波长滤波片61,具体的结构与原理与上述实施例相同,在此不再赘述。
实现了二波长单纤双向器件,并且通过上述同波长分光器,可实现接收和发射光路的分离,与现有技术相比,无需使用部分透射部分反射滤波片,从而实现同波长单纤双向理论上的无损传输,达到较高的发射光功率及接收灵敏度。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。
Claims (5)
1.一种单纤器件,包括用于接收入射光的第一光电二极管和用于发射出射光的激光二极管,其特征在于,还包括:
具有一正方向的同波长分光器,包括沿所述正方向依次设置且垂直于所述正方向的第一双折射片、半波片、45°法拉第旋转片以及与所述第一双折射片相同的第二双折射片;
所述第一双折射片的光轴与所述正方向之间的夹角为α,0°<α<90°;
所述半波片的e轴与所述第一双折射片主截面之间的角度为β,β=67.5°或β=22.5°;
所述入射光沿所述正方向通过所述同波长分光器;
所述出射光沿与所述正方向相反的方向通过所述同波长分光器;
所述出射光为偏振方向垂直于所述第一双折射片的主截面的线偏振光。
2.根据权利要求1所述的单纤器件,其特征在于,
所述第一双折射片的光轴与所述正方向之间的夹角为α=47.85°。
3.根据权利要求2所述的单纤器件,其特征在于,还包括:
收发管芯,用于将所述第一光电二极管和激光二极管封装在一起。
4.根据权利要求2所述的单纤器件,其特征在于,还包括:
设置在所述第一光电二极管与所述同波长分光器之间的入射光光路上的反射镜;
第一接收管芯,用于封装所述第一光电二极管;
发射管芯,用于封装所述激光二极管。
5.根据权利要求3或4所述的单纤器件,其特征在于,还包括:
特定波长滤波片,用于使特定波长的光反射,其他波长的光透射;
第二光电二极管,用于接收所述特定波长的光;
第二接收管芯,用于封装所述第二光电二极管;
所述特定波长滤波片和同波长分光器沿所述正方向依次设置。
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EP12852059.0A EP2685300B1 (en) | 2011-11-22 | 2012-11-22 | Single fibre device |
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CN115166911A (zh) * | 2021-04-01 | 2022-10-11 | 讯芸电子科技(中山)有限公司 | 晶体管外形封装光收发器 |
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