CN112596292A - 一种竖井火灾报警系统用偏振可调的高稳定宽带光源 - Google Patents

一种竖井火灾报警系统用偏振可调的高稳定宽带光源 Download PDF

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CN112596292A
CN112596292A CN202011480806.7A CN202011480806A CN112596292A CN 112596292 A CN112596292 A CN 112596292A CN 202011480806 A CN202011480806 A CN 202011480806A CN 112596292 A CN112596292 A CN 112596292A
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light source
polarization
light
fire alarm
alarm system
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陈江
肖遥王戈
张继武
李迅
李智欣
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State Grid Corp of China SGCC
Wuhan Power Supply Co of State Grid Hubei Electric Power Co Ltd
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Wuhan Power Supply Co of State Grid Hubei Electric Power Co Ltd
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    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/003—Controlling the distribution of the light emitted by adjustment of elements by interposition of elements with electrically controlled variable light transmissivity, e.g. liquid crystal elements or electrochromic devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/54—Cooling arrangements using thermoelectric means, e.g. Peltier elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • 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
    • G02B6/122—Basic optical elements, e.g. light-guiding paths
    • G02B6/124—Geodesic lenses or integrated gratings
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion

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  • Optics & Photonics (AREA)
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Abstract

本发明涉及宽带光源技术领域，具体地说，涉及一种竖井火灾报警系统用偏振可调的高稳定宽带光源。其包括底座，底座上方依次设有光源、光学滤波器和偏振调制单元；光源用于产生发射光，光学滤波器用于对发射光进行滤波以获取所需波长的光波，偏振调制单元用于对经光学滤波器滤波处理后的光波进行调制以获取所需偏振状态的出射光。本发明能够较佳地实现宽带光源的稳定输出。

Description

一种竖井火灾报警系统用偏振可调的高稳定宽带光源
技术领域
本发明涉及宽带光源技术领域，具体地说，涉及一种竖井火灾报警系统用偏振可调的高稳定宽带光源。
背景技术
宽带光源，通常是指光源光谱最大宽度在大于5nm的光源。在光纤光栅传感系统中，对光源的要求较高，如需要较宽的光谱带宽、较高的输出功率、较高的稳定性等。
在电缆竖井火灾报警监测的应用中，通过阵列光栅构建保偏光纤光栅传感系统。这对光源的偏振特性有较高的要求，且同时有对偏振状态快速调制的诉求。现有光源难以满足上述要求，同时因宽带光源受环境温度影响较大，故也很难直接运用于电缆竖井火灾报警监测中。
发明内容
本发明提供了一种竖井火灾报警系统用偏振可调的高稳定宽带光源，其能够克服现有技术的某种或某些缺陷。
根据本发明的一种竖井火灾报警系统用偏振可调的高稳定宽带光源，其包括底座，底座上方依次设有光源、光学滤波器和偏振调制单元；光源用于产生发射光，光学滤波器用于对发射光进行滤波以获取所需波长的光波，偏振调制单元用于对经光学滤波器滤波处理后的光波进行调制以获取所需偏振状态的出射光；
底座处还设有主动控温装置，主动控温装置包括设于底座下方的热电冷却器、设于光源处的温度传感器以及温度控制器；温度控制器用于实时接收温度传感器检测的温度数据并通过控制热电冷却器动作实现对光源处的温度的控制。
本发明中，通过设置偏振调制单元能够较佳地实现光源偏振角度的实时调制，通过设置主动控温装置能够较佳地维持光源所处环境的环境温度，故能够较佳地实现宽带光源的输出。
作为优选，偏振调制单元包括依次设置的第一偏振片、1/4波片、液晶光阀和第二偏振片。从而能够较佳地实现偏振状态的快速调制。
作为优选，第一偏振片为90°偏振片，其用于起偏以产生90°的线偏光。
作为优选，1/4波片为45°1/4波片，其用于将经第一偏振片处理后的光波变换成圆偏光。
作为优选，第二偏振片用于实现0°偏振光的输出。
作为优选，光源采用SLED、REDSLS或LED。
作为优选，光学滤波器采用波导型布拉格光栅结构。
附图说明
图1为实施例1中的高稳定宽带光源的示意图；
图2为实施例1中的偏振调制单元的示意图。
具体实施方式
为进一步了解本发明的内容，结合附图和实施例对本发明作详细描述。应当理解的是，实施例仅仅是对本发明进行解释而并非限定。
实施例1
结合图1所示，本实施例提供了一种竖井火灾报警系统用偏振可调的高稳定宽带光源，其包括底座1，底座1上方依次设有光源2、光学滤波器4和偏振调制单元9；光源2用于产生发射光3，光学滤波器4用于对发射光3进行滤波以获取所需波长的光波，偏振调制单元9用于对经光学滤波器4滤波处理后的光波进行调制以获取所需偏振状态的出射光5；
底座1处还设有主动控温装置，主动控温装置包括设于底座1下方的热电冷却器6、设于光源2处的温度传感器7以及温度控制器8；温度控制器8用于实时接收温度传感器7检测的温度数据并通过控制热电冷却器6动作实现对光源2处的温度的控制。
本实施例中，通过设置偏振调制单元9能够较佳地实现光源偏振角度的实时调制，通过设置主动控温装置能够较佳地维持光源2所处环境的环境温度，故能够较佳地实现宽带光源的输出。
相较于现有宽带光源的稳定方法，本实施例具备结构较为简单、成本较低、能够较佳对抗环境温度波动等优点。
结合图2所示，偏振调制单元9包括依次设置的第一偏振片LP1、1/4波片WP、液晶光阀LCVR和第二偏振片LP2。从而能够较佳地实现偏振状态的快速调制。
本实施例中，设定Sin是入射光偏振态，Sout是出射光偏振态，第一偏振片LP1的传输矩阵为MLP1、1/4波片WP的传输矩阵为MWP、液晶光阀LCVR的传输矩阵为MLCVR、第二偏振片LP2的传输矩阵为MLP2，则Sout＝MLP2MLCVRMWPMLP1Sin。也即本实施例中，能够通过对液晶光阀LCVR的调节，实现对总传输矩阵的改变，故能够较佳地实现快速的偏振状态的调节。
本实施例中，第一偏振片LP1为90°偏振片，其用于起偏以产生90°的线偏光。
本实施例中，1/4波片WP为45°1/4波片，其用于将经第一偏振片LP1处理后的光波变换成圆偏光。
本实施例中，第二偏振片LP2用于实现0°偏振光的输出。
本实施例中，光源2采用SLED、REDSLS或LED。
本实施例中，SLED指超宽发光二级管，REDSLS指稀土掺杂发光元件、LED即发光二极管。
本实施例中，光源2能够采用具备圆形中心波长的热敏光源。
本实施例中，光学滤波器4采用波导型布拉格光栅结构。
本实施例中，光学滤波器4的光谱具有一个或多个光谱特性，光学滤波器4可以是一个波导布拉格光栅结构，波导型布拉格光栅结构可以包括芯和包层中的至少一个。
以上示意性的对本发明及其实施方式进行了描述，该描述没有限制性，附图中所示的也只是本发明的实施方式之一，实际的结构并不局限于此。所以，如果本领域的普通技术人员受其启示，在不脱离本发明创造宗旨的情况下，不经创造性的设计出与该技术方案相似的结构方式及实施例，均应属于本发明的保护范围。

Claims (7)

1.一种竖井火灾报警系统用偏振可调的高稳定宽带光源，其特征在于：包括底座(1)，底座(1)上方依次设有光源(2)、光学滤波器(4)和偏振调制单元(9)；光源(2)用于产生发射光(3)，光学滤波器(4)用于对发射光(3)进行滤波以获取所需波长的光波，偏振调制单元(9)用于对经光学滤波器(4)滤波处理后的光波进行调制以获取所需偏振状态的出射光(5)；
底座(1)处还设有主动控温装置，主动控温装置包括设于底座(1)下方的热电冷却器(6)、设于光源(2)处的温度传感器(7)以及温度控制器(8)；温度控制器(8)用于实时接收温度传感器(7)检测的温度数据并通过控制热电冷却器(6)动作实现对光源(2)处的温度的控制。
2.根据权利要求1所述的一种竖井火灾报警系统用偏振可调的高稳定宽带光源，其特征在于：偏振调制单元(9)包括依次设置的第一偏振片(LP1)、1/4波片(WP)、液晶光阀(LCVR)和第二偏振片(LP2)。
3.根据权利要求2所述的一种竖井火灾报警系统用偏振可调的高稳定宽带光源，其特征在于：第一偏振片(LP1)为90°偏振片，其用于起偏以产生90°的线偏光。
4.根据权利要求2所述的一种竖井火灾报警系统用偏振可调的高稳定宽带光源，其特征在于：1/4波片(WP)为45°1/4波片，其用于将经第一偏振片(LP1)处理后的光波变换成圆偏光。
5.根据权利要求2所述的一种竖井火灾报警系统用偏振可调的高稳定宽带光源，其特征在于：第二偏振片(LP2)用于实现0°偏振光的输出。
6.根据权利要求1所述的一种竖井火灾报警系统用偏振可调的高稳定宽带光源，其特征在于：光源(2)采用SLED、REDSLS或LED。
7.根据权利要求1所述的一种竖井火灾报警系统用偏振可调的高稳定宽带光源，其特征在于：光学滤波器(4)采用波导型布拉格光栅结构。
CN202011480806.7A 2020-12-15 2020-12-15 一种竖井火灾报警系统用偏振可调的高稳定宽带光源 Pending CN112596292A (zh)

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CN212483926U (zh) * 2020-07-03 2021-02-05 西安齐飞光电科技有限公司 一种光电探测器测试用宽带光源装置
CN213420829U (zh) * 2020-12-15 2021-06-11 国家电网有限公司 一种竖井火灾报警系统用偏振可调的高稳定宽带光源

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