WO2016107499A1 - 外置otdr光组件结构 - Google Patents

外置otdr光组件结构 Download PDF

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Publication number
WO2016107499A1
WO2016107499A1 PCT/CN2015/098822 CN2015098822W WO2016107499A1 WO 2016107499 A1 WO2016107499 A1 WO 2016107499A1 CN 2015098822 W CN2015098822 W CN 2015098822W WO 2016107499 A1 WO2016107499 A1 WO 2016107499A1
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Prior art keywords
lens
filter
otdr optical
optical module
fiber optic
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PCT/CN2015/098822
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English (en)
French (fr)
Inventor
胡强鹏
陈序光
张军
余向红
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武汉电信器件有限公司
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Publication of WO2016107499A1 publication Critical patent/WO2016107499A1/zh

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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
    • 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
    • G02B6/4206—Optical features
    • 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
    • G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]

Definitions

  • the invention relates to an optical component structure of an external OTDR (optical time domain reflectometer), and belongs to the field of optical communication.
  • Optical components with built-in OTDR function The original OLT optical component and the OTDR optical component are packaged in a single pipe component. To implement the detection function, the OLT optical module integrated with the OTDR needs to be replaced with the original OLT optical module. The business has added some unnecessary replacement costs.
  • Optical components with external OTDR function Add an optical module that can implement OTDR at the back end of the original OLT optical module, which has lower replacement cost than the built-in solution. On the contrary, the operator does not need to replace the original OLT optical module when using the external OTDR optical module. Therefore, the external OTDR optical component insertion loss is required. If the insertion loss is too high, the optical optical signal transmission quality is degraded. .
  • the active transmitting device mostly adopts the laser welding process, and can only be adjusted in three directions of XYZ, and cannot be performed. Angle adjustment, therefore, there is a problem of angular mismatch. It can be said that as long as there is a laser welding process, it will inevitably encounter an angle mismatch, and the product yield will be greatly limited, and it is difficult to achieve mass production and application of the product.
  • the object of the present invention is to overcome the deficiencies of the prior art and provide a low cost, easy batch size external OTDR optical component structure.
  • the invention provides an external OTDR optical component structure, including a transmitting device, a receiving device and a lens - a filter device, a rectangular tube body and two fiber optic adapters; two fiber optic adapters are respectively connected to the left and right sides of the round square tube body, and the transmitting device and the receiving device are respectively connected to the round square tube body
  • the lens-filter device is disposed inside the circular tube body, and has a first filter, a beam splitter, a matte sheet, a C-lens lens and an isolator.
  • the C-lens lens is disposed between two fiber optic adapters, wherein a center position of the C-lens lens, the first filter, and the beam splitter are on a same horizontal line, and the first filter is
  • the reflecting surface corresponds to the receiving device, and the transmitting surface and the reflecting surface of the beam splitting sheet respectively correspond to the matting sheet and the isolator, the matting sheet is located directly above the beam splitting sheet, and the isolator is located at the Between the beam splitter and the emitting device, and the central positions of the beam splitter, the isolator and the emitting device are on the same vertical line.
  • the transmitting device includes a laser TO-CAN, a sealed welded pipe body, and a sliding pipe body, and the laser TO-CAN is connected to the circular tubular body through the welded welded pipe body and the sliding pipe body, and It is continuously adjustable in three directions of XYZ.
  • the receiving device includes a detector base, a metal member and a second filter, the second filter is mounted on the metal member, and the metal member is mounted on the detector base The second filter is located directly above the first filter.
  • the receiving device includes a detector base, a metal member, a half ball lens and a second filter, and the hemispherical lens and the second filter are mounted on the metal member, a metal member is mounted on the detector base, the second filter is located directly above the first filter, and the hemispherical lens is located at the second filter and the first filter between.
  • the metal piece has a height of 1.5 mm to 2.0 mm.
  • the hemispherical lens has a diameter of 0.8 mm to 1.5 mm, a center thickness of 0.4 mm to 0.75 mm, an effective clear aperture of more than 0.5 mm, and a refractive index of the hemispherical lens of 1.8 at a light wavelength of 1600 nm to 1670 nm. 2.3.
  • the matte sheet coating surface angle is between 0°-20°.
  • the two focal points of the C-lens lens respectively coincide with the fiber ferrule end faces of the two fiber optic adapters.
  • the two contact faces of the rectangular tube body and the two fiber optic adapters may be inclined at any angle between 0° and 5°, and the two inclined surfaces are parallel to each other.
  • two of the fiber optic adapters are symmetrically disposed on the left and right sides of the C-lens lens,
  • the fiber ferrule end face of the fiber optic adapter has an inclination angle ranging from 0° to 12°.
  • the C-lens lens is disposed between two fiber optic adapters, wherein a center position of the C-lens lens, the first filter, and the beam splitter are on a same horizontal line, and the first filter is
  • the reflecting surface corresponds to the receiving device
  • the transmitting surface and the reflecting surface of the beam splitting sheet respectively correspond to the matting sheet and the isolator, the matting sheet is located directly above the beam splitting sheet, and the isolator is located at the Between the splitter and the transmitting device, and the central positions of the beam splitter, the isolator and the transmitting device are on the same vertical line, and the external OTDR optical component structure can reach the batch through the above structure Production, low cost and other beneficial effects, while the theoretical minimum insertion loss can be reduced to about 0.5dB.
  • FIG. 1 is a schematic diagram of application of an external OTDR optical component structure provided by the present invention.
  • FIG. 2 is a schematic front view of a first embodiment of an external OTDR optical component structure provided by the present invention
  • FIG. 3 is a schematic perspective structural view of a first embodiment of an external OTDR optical component structure provided by the present invention.
  • FIG. 4 is a schematic diagram of internal components and optical path structures of a first embodiment of an external OTDR optical component structure provided by the present invention
  • FIG. 5 is a schematic perspective structural view of a second embodiment of an external OTDR optical component structure provided by the present invention.
  • FIG. 6 is a schematic diagram showing the internal components and optical path structure of the second embodiment of the external OTDR optical component structure provided by the present invention.
  • the present invention provides an external OTDR optical component structure, which can be directly cascaded between an existing PON OLT device and an ONU device, thereby implementing fault detection of the optical fiber line by the OLT. And other functions.
  • FIG. 2 to FIG. 4 are a first embodiment of the present invention.
  • the external OTDR optical component structure includes a transmitting device 30, a receiving device 20, a lens-filter device 50, a rectangular tube body 40, and two fiber optic adapters ( 10, 60).
  • the two fiber adapters are an OLT side fiber adapter 10 and an ONU side fiber adapter 60, respectively.
  • Two fiber optic adapters are respectively connected to the left and right sides of the circular tubular body 40, and the transmitting device 30 and the receiving device 20 are respectively connected to upper and lower sides of the circular tubular body 40.
  • the lens-filter device 50 is disposed inside the circular tube body 40, and has a first filter 501, a beam splitter 504, a matte sheet 503, and a C- a lens lens 502 and an isolator 505, the C-lens lens 502 being disposed between two fiber optic adapters, a center position of the C-lens lens 502, the first filter 501, and the beam splitter 504
  • the reflective surface of the first filter 501 corresponds to the receiving device 20
  • the transmitting surface and the reflecting surface of the beam splitting sheet 504 correspond to the matting sheet 503 and the isolator 505, respectively.
  • the matting sheet 503 is located directly above the beam splitter 504, the isolator 505 is located between the beam splitter 504 and the emitting device 30, and the beam splitter 504, the isolator 505 and the emission
  • the center positions of the devices 30 are on the same vertical line.
  • the two focal points of the C-lens lens 502 respectively coincide with the fiber ferrule end faces of the two fiber optic adapters (10, 60).
  • the two contact faces of the rectangular tube body 40 and the two fiber optic adapters may be inclined at any angle between 0° and 5°, and the two inclined surfaces are parallel to each other. In the preferred embodiment, the two contacts are The face tilt angle is 3.7°.
  • Two fiber optic adapters are symmetrically disposed on the left and right sides of the C-lens lens 502.
  • the fiber optic ferrule end face of the fiber optic adapter has an inclination angle ranging from 0° to 12°.
  • the fiber optic adapter has an inclination of 8°.
  • the transmitting device 30 includes a laser TO-CAN 301, a sealed welded pipe body 302, and a sliding pipe body 303.
  • the laser TO-CAN 301 passes through the sealed welded pipe body 302 and the sliding pipe body 303.
  • the square tube body 40 is connected and continuously adjustable in three directions of XYZ.
  • the laser TO-CAN 301 may employ a DFB transmitting chip or an FP transmitting chip.
  • the receiving device 20 includes a detector base 203, a metal member 202, and a second filter 201.
  • the second filter 201 is mounted on the metal member 202.
  • the metal member 202 is mounted on the detector base 203, and the second filter 201 is located directly above the first filter 501.
  • the receiving device 20 can employ an APD receiving chip or a PIN receiving chip.
  • the metal member 202 has a height of 1.5 mm to 2.0 mm.
  • the matte surface of the matte sheet 503 is between 0° and 20°.
  • the matte sheet 503 has a coated surface angle of 11°.
  • the transmitting device 30 emits a detection optical signal of 1625 nm / 1650 nm, and is partially reflected by the optical splitter 504 through the isolator 505 into the ONU side ceramic optical fiber ferrule 601 to enter the back end optical fiber line for fault detection, and the optical splitter 504 is passed through the optical splitter 504. Part of the transmitted light is incident on the matting sheet 503 and consumed.
  • the optical signal 1625 nm/1650 nm from the fault point is emitted from the ONU side ceramic fiber ferrule 601 through the beam splitter 504, and the C-lens lens 502 is incident on the first filter 501 and totally reflected and incident on the second filter 201.
  • the reflected signal processing of the fault point is completed by photoelectric signal conversion.
  • the data optical signal 1490nm from the OLT side is emitted by the OLT side optical fiber ferrule 101 and transmitted through the first filter 501, the C-lens lens 502, and the beam splitter 504, and then enters the ONU side optical fiber ferrule 601, and then passes through the back end optical fiber. Passed to the ONU end to complete data transmission from the OLT to the ONU;
  • the optical signal from the ONU is 1310 nm
  • the ONU-side ceramic fiber pin 601 is totally transmitted through the beam splitter 504, the C-lens lens 502, and the first filter 501, and then enters the OLT-side ceramic fiber ferrule 601.
  • the back end fiber is transmitted to the OLT end to complete the ONU to OLT data transmission.
  • an external OTDR optical component structure of the present embodiment is different from the first embodiment in that the receiving device 20 is positioned relative to the C-lens lens 502. Differences, in order to save space and not repeat the description, the present embodiment only describes the different parts of the receiving device 20: the receiving device 20 includes a detector base 203, a metal member 202, a hemispherical lens 204, and a second filter 201, The hemispherical lens 204 and the second filter 201 are mounted on the metal member 202, the metal member 202 is mounted on the detector base 203, and the second filter 201 is located in the first Directly above a filter 501, the hemispherical lens 204 is located between the second filter 201 and the first filter 501, wherein the hemispherical lens 204 has a diameter of 0.8 mm to 1.5 mm.
  • the center has a thickness of 0.4 mm to 0.75 mm, an effective clear aperture of more than 0.5 mm, and a refractive index of the hemispherical lens 204 of 1.8 to 2.3 at a light wavelength of 1600 nm to 1670 nm.
  • the reflected beam from the fault point is in a divergent form, so that after passing through the hemispherical lens 204, the light beam is in a converging form, and then incident on the receiving chip of the receiving device 20 through the second filter 201.
  • the change of the position of the receiving device 20 only causes the optical signal to change through the sequence of different optical components without generating other essential changes, and the repeated description is not repeated again. For details, see FIG.
  • the external OTDR optical component structure can achieve mass production, low cost and the like through the above structure, and the theoretical minimum insertion loss can be reduced to about 0.5 dB.

Abstract

一种外置OTDR光组件结构，包括发射装置（30）、接收装置（20）、透镜-滤光装置（50）、圆方管体（40）及两个光纤适配器（10,60）；透镜-滤光装置（50）设置于圆方管体（40）的内部，具有第一滤光片（501）、分光片（504）、消光片（503）、C-lens透镜（502）及一隔离器（505），C-lens透镜（502）设置于两个光纤适配器（10,60）之间，C-lens透镜（502）、第一滤光片（501）和分光片（504）的中心位置处于同一水平线上，第一滤光片（501）的反射面对应接收装置（20），分光片（504）的透射面和反射面分别对应消光片（503）和隔离器（505），消光片（503）位于分光片（504）的正上方，隔离器（505）位于分光片（504）与发射装置（30）之间，且分光片（504）、隔离器（505）和发射装置（30）的中心位置处于同一竖直线上。所述外置OTDR光组件结构具有可批量生产、成本低等有益效果。

Description

外置OTDR光组件结构 技术领域
本发明涉及一种外置OTDR(Optical Time Domain Reflectometer，光时域反射仪)光组件结构，属于光通信领域。
背景技术
随着Fttx网络的大规模铺设，对能否实现高效、快速、低成本地对光网络故障定位提出了新的要求。基于这种需求，OLT(optical line terminal)端的网络物理层需要一种新的光组件。
要实现对光纤线路故障点定位、检测的功能，需要增加检测信号发射装置和对反射信号接收装置，因此实现该功能的光组件方案主要有两种：
1)内置OTDR功能的光组件：将原有OLT光组件和OTDR光组件封装在一个管体组件中，要实现检测功能，需要用集成了OTDR的OLT光模块更换原有OLT光模块，对于运营商来说增加了一些不必要的更换成本。
2)外置OTDR功能的光组件：在原有OLT光模块后端增加一可实现OTDR的光模块，与内置方案相比，具有较低的更换成本。相反的，由于运营商在使用外置OTDR光模块时不需要更换原有OLT光模块，因此就需要对外置OTDR光组件插损提出要求，插损过高导致数据光信号传输质量下降，则得不偿失。
因此，在光路的实现方式上，大多的光组件研发人员热衷于采用平行光路，这样可以将插损降到约0.3dB以下。由于平行光路对角度敏感，经过Fiber-Lens光学系统后的准直光常常带有一定的角度偏差，而目前有源发射装置多采用激光焊接工艺，仅能在XYZ三个方向进行调整，无法进行角度调整，因此，存在角度失配的问题，可以说，只要存在激光焊接工艺，就不可避免会遇到角度失配，产品成品率将受到极大限制，很难实现产品的批量生产和应用。
因此有必要设计一种新的外置OTDR光组件结构，以克服上述问题。
技术问题
本发明的目的在于克服现有技术的缺陷，提供了一种低成本、易批量的外置OTDR光组件结构。
技术解决方案
本发明提供一种外置OTDR光组件结构，包括发射装置、接收装置、透镜- 滤光装置、圆方管体及两个光纤适配器；两个光纤适配器分别连接至所述圆方管体的左右两侧，所述发射装置和所述接收装置分别连接至所述圆方管体的上下两侧；所述透镜-滤光装置设置于所述圆方管体的内部，其具有一第一滤光片、一分光片、一消光片、一C-lens透镜及一隔离器，所述C-lens透镜设置于两个光纤适配器之间，所述C-lens透镜、所述第一滤光片和所述分光片的中心位置处于同一水平线上，所述第一滤光片的反射面对应所述接收装置，所述分光片的透射面和反射面分别对应所述消光片和所述隔离器，所述消光片位于所述分光片的正上方，所述隔离器位于所述分光片与所述发射装置之间，且所述分光片、所述隔离器和所述发射装置的中心位置处于同一竖直线上。
进一步地，所述发射装置包括激光器TO-CAN、封焊管体以及滑动管体，所述激光器TO-CAN通过所述封焊管体和所述滑动管体与所述圆方管体连接，并可在XYZ三个方向连续可调。
进一步地，所述接收装置包括一探测器底座、一金属件以及一第二滤光片，所述第二滤光片安装于所述金属件上，所述金属件安装于所述探测器底座上，所述第二滤光片位于所述第一滤光片的正上方。
进一步地，所述接收装置包括一探测器底座、一金属件、一半球透镜以及一第二滤光片，所述半球透镜和所述第二滤光片安装于所述金属件上，所述金属件安装于所述探测器底座上，所述第二滤光片位于所述第一滤光片的正上方，所述半球透镜位于所述第二滤光片和所述第一滤光片之间。
进一步地，所述金属件高度为1.5mm-2.0mm。
进一步地，所述半球透镜直径为0.8mm-1.5mm，中心厚度为0.4mm-0.75mm，有效通光孔径大于0.5mm，在光波长1600nm-1670nm时，所述半球透镜的折射率为1.8-2.3。
进一步地，所述消光片镀膜面角度在0°-20°之间。
进一步地，所述C-lens透镜的两个焦点分别与两个所述光纤适配器的光纤插芯端面重合。
进一步地，所述圆方管体与两个所述光纤适配器的两个接触面可在0°-5°之间任一角度倾斜，且两倾斜面相互平行。
进一步地，两个所述光纤适配器对称设置于所述C-lens透镜的左右两侧，所述 光纤适配器的光纤插芯端面倾斜角度范围为0°-12°。
有益效果
所述C-lens透镜设置于两个光纤适配器之间，所述C-lens透镜、所述第一滤光片和所述分光片的中心位置处于同一水平线上，所述第一滤光片的反射面对应所述接收装置，所述分光片的透射面和反射面分别对应所述消光片和所述隔离器，所述消光片位于所述分光片的正上方，所述隔离器位于所述分光片与所述发射装置之间，且所述分光片、所述隔离器和所述发射装置的中心位置处于同一竖直线上，所述外置OTDR光组件结构通过上述结构可达到批量生产，成本低等有益效果，同时其理论最低插损可降低至约0.5dB。
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它的附图。
图1本发明提供的外置OTDR光组件结构的应用示意图；
图2本发明提供的外置OTDR光组件结构的第一实施例的正面结构示意图；
图3本发明提供的外置OTDR光组件结构的第一实施例的立体结构示意图；
图4本发明提供的外置OTDR光组件结构的第一实施例的内部构件及光路结构示意图；
图5本发明提供的外置OTDR光组件结构的第二实施例的立体结构示意图；
图6本发明提供的外置OTDR光组件结构的第二实施例的内部构件及光路结构示意图。
本发明的实施方式
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做出创造性劳动的前提下所获得的所有其它实施例，都属于本发明保护的范围。
如图1所示，本发明提供一种外置OTDR光组件结构，该组件可直接级联在现有PON OLT设备与ONU设备之间，从而实现OLT对光纤线路的故障检测 等功能。
图2至图4为本发明提供的第一实施例，所述外置OTDR光组件结构包括发射装置30、接收装置20、透镜-滤光装置50、圆方管体40及两个光纤适配器(10，60)。两个光纤适配器分别为OLT侧光纤适配器10和ONU侧光纤适配器60。两个光纤适配器分别连接至所述圆方管体40的左右两侧，所述发射装置30和所述接收装置20分别连接至所述圆方管体40的上下两侧。
如图2至图4，所述透镜-滤光装置50设置于所述圆方管体40的内部，其具有一第一滤光片501、一分光片504、一消光片503、一C-lens透镜502及一隔离器505，所述C-lens透镜502设置于两个光纤适配器之间，所述C-lens透镜502、所述第一滤光片501和所述分光片504的中心位置处于同一水平线上，所述第一滤光片501的反射面对应所述接收装置20，所述分光片504的透射面和反射面分别对应所述消光片503和所述隔离器505，所述消光片503位于所述分光片504的正上方，所述隔离器505位于所述分光片504与所述发射装置30之间，且所述分光片504、所述隔离器505和所述发射装置30的中心位置处于同一竖直线上。其中，所述C-lens透镜502的两个焦点分别与两个所述光纤适配器(10，60)的光纤插芯端面重合。所述圆方管体40与两个所述光纤适配器的两个接触面可在0°-5°之间任一角度倾斜，且两倾斜面相互平行，在本较佳实施例中，两接触面倾斜角度为3.7°。两个所述光纤适配器对称设置于所述C-lens透镜502的左右两侧，所述光纤适配器的光纤插芯端面倾斜角度范围为0°-12°，在本较佳实施例中，光纤适配器的光纤插芯端面倾角为8°。
如图2至图4，所述发射装置30包括激光器TO-CAN301、封焊管体302以及滑动管体303，所述激光器TO-CAN301通过所述封焊管体302和所述滑动管体303与所述圆方管体40连接，并可在XYZ三个方向连续可调。所述激光器TO-CAN301可以采用DFB发射芯片或FP发射芯片。
如图2至图4，所述接收装置20包括一探测器底座203、一金属件202以及一第二滤光片201，所述第二滤光片201安装于所述金属件202上，所述金属件202安装于所述探测器底座203上，所述第二滤光片201位于所述第一滤光片501的正上方。所述接收装置20可以采用APD接收芯片或PIN接收芯片。所述金属件202高度为1.5mm-2.0mm。
如图2至图4，另外，所述消光片503镀膜面角度在0°-20°之间。在本较佳实施例中，该消光片503镀膜面角度为11°。
本发明实施例中，发射装置30发射检测光信号1625nm/1650nm,经隔离器505后再经分光片504部分反射进入ONU侧陶瓷光纤插芯601进入后端光纤线路进行故障检测，经分光片504的部分透射光入射进消光片503消耗掉。
来自故障点的光信号1625nm/1650nm由ONU侧陶瓷光纤插芯601出射通过分光片504、C-lens透镜502入射在第一滤光片501上全反射入射在第二滤光片201后透射入射在接收装置20的接收芯片上，经光电信号转换完成对故障点的反射信号处理。
来自OLT侧的数据光信号1490nm由OLT侧光纤插芯101出射全透射通过第一滤光片501、C-lens透镜502以及分光片504后入射进入ONU侧光纤插芯601，再经后端光纤传向ONU端以完成OLT向ONU数据传输；
同样的，来自ONU的光信号1310nm，由ONU侧陶瓷光纤插针601出射全透射通过分光片504、C-lens透镜502以及第一滤光片501后入射进入OLT侧陶瓷光纤插芯601，再经后端光纤传向OLT端以完成ONU向OLT数据传输。
如图5和图6为本发明的第二实施例：本实施例之一种外置OTDR光组件结构，与上述第一实施例相比，其区别在于接收装置20相对C-lens透镜502位置差异，为了节省篇幅且不重复赘述，本实施例仅对区别部分的接收装置20予以说明：所述接收装置20包括探测器底座203、金属件202、半球透镜204以及第二滤光片201，所述半球透镜204和所述第二滤光片201安装于所述金属件202上，所述金属件202安装于所述探测器底座203上，所述第二滤光片201位于所述第一滤光片501的正上方，所述半球透镜204位于所述第二滤光片201和所述第一滤光片501之间，其中，所述半球透镜204直径为0.8mm-1.5mm，中心厚度为0.4mm-0.75mm，有效通光孔径大于0.5mm，在光波长1600nm-1670nm时，所述半球透镜204的折射率为1.8-2.3。来自故障点反射光束为发散形态，因此经过半球透镜204后光束成会聚形态，再经过第二滤光片201入射在接收装置20的接收芯片上。接收装置20的位置变化仅引起光信号通过不同光学零部件的先后顺序发生变化，而不产生其它本质变化，再次也不做重复说明，具体可参见图6所示。
综上所述，所述外置OTDR光组件结构通过上述结构可达到批量生产，成本低等有益效果，同时其理论最低插损可降低至约0.5dB。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种外置OTDR光组件结构，其特征在于，包括发射装置、接收装置、透镜-滤光装置、圆方管体及两个光纤适配器；
    两个光纤适配器分别连接至所述圆方管体的左右两侧，所述发射装置和所述接收装置分别连接至所述圆方管体的上下两侧；
    所述透镜-滤光装置设置于所述圆方管体的内部，其具有一第一滤光片、一分光片、一消光片、一C-lens透镜及一隔离器，所述C-lens透镜设置于两个光纤适配器之间，所述C-lens透镜、所述第一滤光片和所述分光片的中心位置处于同一水平线上，所述第一滤光片的反射面对应所述接收装置，所述分光片的透射面和反射面分别对应所述消光片和所述隔离器，所述消光片位于所述分光片的正上方，所述隔离器位于所述分光片与所述发射装置之间，且所述分光片、所述隔离器和所述发射装置的中心位置处于同一竖直线上。
  2. 如权利要求1所述的外置OTDR光组件结构，其特征在于：所述发射装置包括激光器TO-CAN、封焊管体以及滑动管体，所述激光器TO-CAN通过所述封焊管体和所述滑动管体与所述圆方管体连接，并可在XYZ三个方向连续可调。
  3. 如权利要求1所述的外置OTDR光组件结构，其特征在于：所述接收装置包括一探测器底座、一金属件以及一第二滤光片，所述第二滤光片安装于所述金属件上，所述金属件安装于所述探测器底座上，所述第二滤光片位于所述第一滤光片的正上方。
  4. 如权利要求1所述的外置OTDR光组件结构，其特征在于：所述接收装置包括一探测器底座、一金属件、一半球透镜以及一第二滤光片，所述半球透镜和所述第二滤光片安装于所述金属件上，所述金属件安装于所述探测器底座上，所述第二滤光片位于所述第一滤光片的正上方，所述半球透镜位于所述第二滤光片和所述第一滤光片之间。
  5. 如权利要求3或4所述的外置OTDR光组件结构，其特征在于：所述金属件高度为1.5mm-2.0mm。
  6. 如权利要求4所述的外置OTDR光组件结构，其特征在于：所述半球透镜直径为0.8mm-1.5mm，中心厚度为0.4mm-0.75mm，有效通光孔径大于0.5mm，在光波长1600nm-1670nm时，所述半球透镜的折射率为1.8-2.3。
  7. 如权利要求1所述的外置OTDR光组件结构，其特征在于：所述消光片镀膜面角度在0°-20°之间。
  8. 如权利要求1所述的外置OTDR光组件结构，其特征在于：所述C-lens透镜的两个焦点分别与两个所述光纤适配器的光纤插芯端面重合。
  9. 如权利要求1所述的外置OTDR光组件结构，其特征在于：所述圆方管体与两个所述光纤适配器的两个接触面可在0°-5°之间任一角度倾斜，且两倾斜面相互平行。
  10. 如权利要求1所述的外置OTDR光组件结构，其特征在于：两个所述光纤适配器对称设置于所述C-lens透镜的左右两侧，所述光纤适配器的光纤插芯端面倾斜角度范围为0°-12°。
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