WO2020098300A1 - 混合型光隔离器 - Google Patents
混合型光隔离器 Download PDFInfo
- Publication number
- WO2020098300A1 WO2020098300A1 PCT/CN2019/096304 CN2019096304W WO2020098300A1 WO 2020098300 A1 WO2020098300 A1 WO 2020098300A1 CN 2019096304 W CN2019096304 W CN 2019096304W WO 2020098300 A1 WO2020098300 A1 WO 2020098300A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- optical
- beam splitter
- monitoring component
- photodetector
- Prior art date
Links
Classifications
-
- 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
- G02F1/093—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 used as non-reciprocal devices, e.g. optical isolators, circulators
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/0014—Monitoring arrangements not otherwise provided for
Definitions
- the present application relates to the field of optical devices for optical fiber communication, and more particularly to a hybrid optical isolator.
- Fiber laser refers to a laser that uses rare earth-doped glass fiber as the gain medium, which is used in laser fiber communication, laser space long-distance communication, industrial shipbuilding, automobile manufacturing, laser engraving laser marking, laser cutting, metal nonmetal Drilling / cutting / welding, military defense security, medical instruments and equipment, large-scale infrastructure, etc. Because the emission spectrum of active fiber doped with rare earth elements is in the near-infrared region, many materials are more effectively marked, cut, and drilled by visible or UV lasers.
- near-infrared polarized lasers can pass through nonlinear optical crystals, two Sub-harmonics, frequency oscillations and higher-order nonlinear processes can be converted into visible lasers or UV lasers, but the conversion of laser beams from infrared to visible or UV nonlinear laser wavelengths always has reflected lasers or reflected Amplified spontaneous emission (ASE), the reflected laser or ASE can easily destroy the stability of the laser, or even damage the fiber laser.
- polarization-dependent optical isolators are widely used in fiber lasers.
- the technical problem to be solved by the present application is to provide a low-cost hybrid optical isolator that can avoid damage to the laser and ensure its stability.
- the present application provides a hybrid optical isolator, which includes:
- An input lens is provided on the output optical path of the input fiber to collimate the incident light
- a first optical energy monitoring component provided on the light path of the input lens, for monitoring the energy of the input laser in real time
- a polarization state monitoring component provided on the optical path of the first optical energy monitoring component, for real-time monitoring The polarization state of the input laser
- an optical isolation component provided on the optical path of the polarization state monitoring component, for allowing the transmitted light from the polarization state monitoring component to pass, and blocking the reverse direction of the light path opposite to the direction of the incident light;
- a second optical energy monitoring component provided on the optical path of the optical isolation component, for real-time monitoring of the energy of the amplified spontaneous radiation reflected back;
- An output lens is provided on the optical path of the second light energy monitoring component to couple the light beam from the second light energy monitoring component into the output fiber.
- the first optical energy monitoring component includes a first beam splitter and a first photodetector, the first beam splitter is provided in the input lens and the polarization state monitoring component For allowing incident light to pass through and split the incident light, the first photodetector is disposed on the refracted optical path of the first beam splitter to monitor the incident light beam passing through the first beam splitter Light intensity;
- the polarization state monitoring component includes a polarization beam splitter and a third photodetector, the polarization beam splitter is disposed on the optical path of the first beam splitter to transmit the light, and is used to allow incident light to pass through, and Split the incident light, the third photodetector is disposed on the refracted optical path of the polarizing beam splitter to monitor the light intensity of the incident light beam passing through the polarizing beam splitter;
- the second optical energy monitoring component includes There is a second beam splitter and a second photodetector, the second beam splitter is disposed between the optical
- the first optical energy monitoring component, the polarization state monitoring component and the second optical energy monitoring component in the hybrid optical isolator are all provided with a focusing lens to refract the light beam in the optical path Converge on the light detector.
- the first beam splitter and the second beam splitter are parallel glass plates coated with a beam splitting film, and a parallel glass plate forms an acute angle with the output optical axis of the input lens, and the other The parallel glass plate forms a pure angle with the input optical axis of the output lens.
- the acute angle is 45 °
- the obtuse angle is 135 °.
- the first beam splitter and the second beam splitter are two right-angle prisms coated with a beam splitting film.
- the polarization beam splitter is a right angle of two inclined planes coated with S light and P light separation films Cube structure with prism glued together.
- the first photodetector, the second photodetector and the third photodetector are all photodiodes.
- the input lens and the output lens are both lenses with an 8-degree angle slope, the 8-degree angle slope of the input lens faces the input optical fiber, and the 8-degree angle slope of the output lens faces Output fiber.
- the optical isolation component includes:
- a first beam shifter for splitting the incident light from the polarization state monitoring component into 0 light and E light
- a Faraday rotator which is disposed on the optical path of the first beam shifter and used to convert the
- a half wave plate used to rotate the 0 light and the E light in the opposite direction with respect to the Faraday rotation direction by 45 degrees;
- the hybrid optical isolator of the present application integrates three monitoring functions in the optical path of the fiber laser into the isolator, so that the connection between the laser optical device and the disk fiber can be avoided, and the optical fiber can be reduced
- the effect of the fusion splice point and disk fiber on the stability of the laser greatly improves the stability of the optical path in the laser.
- the hybrid optical isolator of this application can monitor the optical path of the fiber laser in real time, especially the spontaneous amplification of the reflected back Radiation energy monitoring, so that the laser and the protection laser can be understood more clearly.
- FIG. 1 is a schematic structural diagram of a first embodiment of a hybrid optical isolator of the present application.
- FIG. 2 is a schematic structural view of a second embodiment of a hybrid optical isolator of the present application.
- FIG. 1 is a schematic structural diagram of a first embodiment of a hybrid optical isolator 1 of the present application.
- the hybrid optical isolator 1 includes an input lens 10, a first optical energy monitoring component, a polarization monitoring component, an optical isolation component 30, and a second optical energy monitoring Components and one loss ⁇ 40 ⁇ The lens 40.
- the first optical energy monitoring component includes a first optical beam splitter 201, a first focusing lens 601 and a first optical detector 502;
- the polarization state monitoring component includes a polarizing beam splitter 203 and a third focusing lens 602 and a third light detector 501;
- the second energy monitoring component includes a second beam splitter 202, a second focusing lens 603, and a second light detector 503.
- the optical isolation component includes a first beam shifter 301, a Faraday rotator 302, a magnetic ring, a half-wave plate 303, and a second beam shifter 304.
- the input lens 10 is provided on the output optical path of the input optical fiber 2 to collimate the incident light, that is, to collimate the laser beam emitted by the input optical fiber 2 with a certain beam divergence angle
- the first beam splitter 201 is provided on the light path of the input lens 10 to allow incident light to pass through and split the incident light;
- the first focusing lens 601 is provided on the first light beam splitter 201
- the refracted parallel light is focused on the first photodetector 502 through the first focusing lens 601 to realize the energy monitoring of the input laser, that is, the optical energy of the input laser beam is monitored;
- the polarization beam splitter 203 may be two A cube structure with a right angle prism coated with S-light and P-light separation films glued together, understandably, a polarizing beam splitter that uses birefringent crystals to achieve the same function also belongs to the scope of protection of this patent.
- the third focusing lens 602 is provided on the refracted optical path of the polarizing beam splitter 203 The deflected parallel light is focused on the third photodetector 501 through the third focusing lens 602 to monitor the polarization state of the input laser, that is, the intensity of the transmitted light beam passing through the polarization beam splitter 203, and then the laser The linear polarization state of the light beam; the optical isolation component 30 is provided on the optical beam path of the polarizing beam splitter 203 to transmit the light from the polarizing beam splitter 203, and blocks the direction of the optical path opposite to the direction of the incident light Reverse light, so that the laser is protected from the reverse light; the second beam splitter 202 is used to allow the transmitted light from the optical isolation component 30 to pass through and split the reverse light; the second focusing lens 603 is disposed
- the first photodetector 502, the second photodetector 503, and the third photodetector 501 are all photodiodes. It can be seen that the photodiodes in the hybrid optical isolator 1 of the present application are built-in and occupy optical fibers The laser is small in size and low in cost.
- the first Both the beam splitter 201 and the second beam splitter 202 are two right-angle prisms coated with a beam splitting film.
- the optical isolation assembly 30 includes a first beam shifter 301, a Faraday rotator 302, a magnetic ring, half wave plate 303 and a second beam shifter 304;
- the first beam shifter 301 is used to split the light emitted from the polarization beam splitter 203 into 0 light and E light;
- the beam shifter uses a birefringent crystal to Natural light is decomposed into polarized lights whose polarization directions are perpendicular to each other;
- the Faraday rotator 302 is provided on the optical path of the first beam shifter 301, and is used to rotate the 0-light and E-light vibration planes by 45 ° according to the magnetic field direction;
- the magnetic ring is sleeved on the Faraday rotator 302 to generate a magnetic field;
- the half-wave plate 303 is used to rotate the 0 light and the E light in the opposite direction by 45 degrees relative to the Faraday rotation direction;
- multiple isolator assemblies 30 may be connected in series, and the beam shifter may also be replaced with a polarizer. Since the polarization direction of the P light emitted by the polarizing beam splitter 203 in the embodiment of the present application is the same as the 0 light, the P light emitted can pass through the isolator assembly 30 and be coupled into the output fiber 3 through the output lens 40 without deflection.
- the input lens 10 and the output lens 40 are both C-Len with an 8-degree slope, the 8-degree slope of the input lens 10 faces the input optical fiber 2, and the output lens 40 The 8-degree inclined surface faces the output fiber 3. Understandably, in some other embodiments, the input lens 10 and the output lens 40 may also be G-lens, or other lenses that can achieve some functions.
- FIG. 2 is a schematic structural diagram of a second embodiment of a hybrid optical isolator 1 of the present application.
- the difference between this embodiment and the first embodiment is that both the first beam splitter 201 and the second beam splitter 202 use a glass plate coated with a beam splitting film, the beam splitting film has a certain beam splitting ratio, and a parallel
- the glass plate forms an acute angle with the output optical axis of the input lens 10, and another parallel glass plate forms an obtuse angle with the input optical axis of the output lens 40.
- the acute angle is 45 ° and the obtuse angle is 135 °.
- the first beam splitter 201 and the output optical axis of the input lens 10 are at 45 °
- the second beam splitter 202 and the input optical axis of the output lens 40 are at 135 °.
- two parallel glass plates are placed in opposite directions to compensate for the flat The offset of the main optical path caused by the glass. Understandably, in some other embodiments, the parallel glass plate may also be a wedge with a certain angle.
- the hybrid optical isolator of the present application integrates three monitoring functions in the optical path of the fiber laser into the isolator, so the connection between the laser optical devices and the disk fiber can be avoided, and the fusion between the optical fibers can be reduced
- the influence of dots and disk fibers on the stability of the laser greatly improves the stability of the optical path in the laser.
- the hybrid optical isolator of this application can monitor the optical path of the fiber laser in real time, especially for the amplified spontaneous radiation reflected back Energy monitoring, so that you can understand the laser and protect the laser more clearly
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201811345691.3 | 2018-11-13 | ||
CN201811345691.3A CN109283706A (zh) | 2018-11-13 | 2018-11-13 | 混合型光隔离器 |
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WO2020098300A1 true WO2020098300A1 (zh) | 2020-05-22 |
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PCT/CN2019/096304 WO2020098300A1 (zh) | 2018-11-13 | 2019-07-17 | 混合型光隔离器 |
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CN (1) | CN109283706A (zh) |
WO (1) | WO2020098300A1 (zh) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109283706A (zh) * | 2018-11-13 | 2019-01-29 | 英诺激光科技股份有限公司 | 混合型光隔离器 |
CN114900242A (zh) * | 2022-07-14 | 2022-08-12 | 西安炬光科技股份有限公司 | 光路结构、光中继装置及光纤激光器 |
Citations (5)
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US20090213363A1 (en) * | 2008-02-27 | 2009-08-27 | Dmitry Starodubov | Power monitoring device for powerful fiber laser systems |
CN102360131A (zh) * | 2011-09-29 | 2012-02-22 | 中国科学院上海光学精密机械研究所 | 多功能高功率保偏光纤隔离器 |
CN203561804U (zh) * | 2013-09-02 | 2014-04-23 | 辽宁科旺光电科技有限公司 | 一种光路混合器 |
CN105449497A (zh) * | 2014-09-30 | 2016-03-30 | 中国兵器装备研究院 | 一种隔离滤波耦合多功能光纤器件 |
CN109283706A (zh) * | 2018-11-13 | 2019-01-29 | 英诺激光科技股份有限公司 | 混合型光隔离器 |
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WO2013127063A1 (zh) * | 2012-02-28 | 2013-09-06 | 深圳市杰普特电子技术有限公司 | 光隔离器 |
JP2017135252A (ja) * | 2016-01-27 | 2017-08-03 | 住友電気工業株式会社 | 発光モジュール |
JP7062882B2 (ja) * | 2017-04-28 | 2022-05-09 | 富士通オプティカルコンポーネンツ株式会社 | 波長モニタ装置、光源装置及び光モジュール |
CN208953818U (zh) * | 2018-11-13 | 2019-06-07 | 英诺激光科技股份有限公司 | 混合型光隔离器 |
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2018
- 2018-11-13 CN CN201811345691.3A patent/CN109283706A/zh active Pending
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- 2019-07-17 WO PCT/CN2019/096304 patent/WO2020098300A1/zh active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090213363A1 (en) * | 2008-02-27 | 2009-08-27 | Dmitry Starodubov | Power monitoring device for powerful fiber laser systems |
CN102360131A (zh) * | 2011-09-29 | 2012-02-22 | 中国科学院上海光学精密机械研究所 | 多功能高功率保偏光纤隔离器 |
CN203561804U (zh) * | 2013-09-02 | 2014-04-23 | 辽宁科旺光电科技有限公司 | 一种光路混合器 |
CN105449497A (zh) * | 2014-09-30 | 2016-03-30 | 中国兵器装备研究院 | 一种隔离滤波耦合多功能光纤器件 |
CN109283706A (zh) * | 2018-11-13 | 2019-01-29 | 英诺激光科技股份有限公司 | 混合型光隔离器 |
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