WO2012106886A1 - 分光装置、光复用装置及方法、光分插复用设备 - Google Patents

分光装置、光复用装置及方法、光分插复用设备 Download PDF

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Publication number
WO2012106886A1
WO2012106886A1 PCT/CN2011/077111 CN2011077111W WO2012106886A1 WO 2012106886 A1 WO2012106886 A1 WO 2012106886A1 CN 2011077111 W CN2011077111 W CN 2011077111W WO 2012106886 A1 WO2012106886 A1 WO 2012106886A1
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WO
WIPO (PCT)
Prior art keywords
filter film
light wave
incident
light
predetermined angle
Prior art date
Application number
PCT/CN2011/077111
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English (en)
French (fr)
Inventor
傅正华
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2011/077111 priority Critical patent/WO2012106886A1/zh
Priority to CN2011800012732A priority patent/CN102317815A/zh
Priority to EP11858072.9A priority patent/EP2565691B1/en
Publication of WO2012106886A1 publication Critical patent/WO2012106886A1/zh
Priority to US13/682,266 priority patent/US8908281B2/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • 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
    • G02B6/29346—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 wave or beam interference
    • G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
    • G02B6/29362—Serial cascade of filters or filtering operations, e.g. for a large number of channels
    • G02B6/29365—Serial cascade of filters or filtering operations, e.g. for a large number of channels in a multireflection configuration, i.e. beam following a zigzag path between filters or filtering operations
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/142—Coating structures, e.g. thin films multilayers
    • 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
    • G01J2003/1226—Interference filters
    • G01J2003/1243—Pivoting IF or other position variation

Definitions

  • the present invention relates to the field of optical communication technologies, and in particular, to a light splitting device, an optical multiplexing device and method, and an optical add/drop multiplexing device. Background technique
  • Optical communication plays an increasingly important role in modern communication technology.
  • node and downlink of optical transmission different wavelengths of light need to be separated or multiplexed to realize the uploading and downloading of optical signals of different wavelengths.
  • the method of serially separating the devices is mainly used, or the Array Waveguide Grating (AWG) technology is used to separate or multiplex the light of different wavelengths.
  • AWG Array Waveguide Grating
  • the method of serially separating the devices uses a filter technology to separate a specific wavelength of light from a plurality of wavelength-wavelength-multiplexed optical signals or a specific wavelength of light waves through a three-port device.
  • the incident light waves are multiplexed.
  • the AWG technology mainly uses the waveguide technology to make different wavelengths of light pass through different paths, and then form energy concentration at different side exits, thereby separating light of different wavelengths.
  • Such an optical add/drop multiplexer is temperature sensitive and has poor performance parameters, requiring an electrically controlled heater; and the AWG chip is relatively expensive to manufacture and costly. Summary of the invention
  • Embodiments of the present invention provide a spectroscopic device, an optical multiplexing device and method, and an optical add/drop multiplexing device, which can improve the performance of an optical add/drop multiplex device while reducing the cost of the optical add/drop multiplex device.
  • a light splitting device comprising a substrate, an upper surface of the substrate is provided with an anti-reflection film, a lower surface of the substrate is provided with a filter film, and a light redirecting portion disposed opposite to the filter film is further included;
  • the optical signal is incident on the filter film at a first predetermined angle, and the first wavelength light wave of the optical signal is transmitted by the filter film to separate the first wavelength light wave from the optical signal, and The light wave other than the first wavelength light wave is reflected by the filter film to the light turning portion, and the light turning portion causes the light wave reflected to the light turning portion to enter the filter film at a second predetermined angle.
  • a second wavelength light wave in the optical signal is transmitted by the filter film to separate the second wavelength light wave from the optical signal;
  • the second predetermined angle is different from the first predetermined angle, and the first predetermined angle is an incident angle at which the optical signal is incident on the filter film when the filter film allows transmission of a first wavelength light wave.
  • the second predetermined angle is an incident angle at which the optical signal is incident on the filter film when the filter film allows transmission of a second wavelength light wave.
  • the light reflected by the filter film to the light turning portion is incident on the filter film at a second predetermined angle by the light turning portion;
  • the second predetermined angle is different from the first predetermined angle, and the first predetermined angle is an incident angle at which the optical signal is incident on the filter film when the filter film allows transmission of a first wavelength light wave.
  • the second predetermined angle is an incident angle at which the optical signal is incident on the filter film when the filter film allows transmission of a second wavelength light wave.
  • the optical splitting apparatus and method and the optical add/drop multiplexing apparatus utilize filtering when an optical signal multiplexed by a plurality of wavelengths of light waves is incident on the filter film at different angles
  • the principle that the wavelength of the light wave that the film is allowed to transmit is different, and the light wave reflected by the filter film or the light wave transmitted through the filter film is changed by the light turning portion, and the light wave whose propagation direction is changed is reflected from the filter film or An angle different from the angle of transmission is re-incident to the filter film.
  • light waves of different wavelengths can be transmitted from different positions of the same filter film through the light turning portion, thereby effectively separating the multiple light waves of different wavelengths.
  • the embodiment of the invention provides that the separation of the multi-wavelength light waves can be realized by using one light splitting device without the serial connection of the light splitting device, thereby saving materials, reducing the volume of the optical add/drop multiplexing device, and simplifying the packaging.
  • the utility model effectively improves the performance of the optical add/drop multiplexer and reduces the cost of the optical add/drop multiplexer.
  • An optical multiplexing device comprising a substrate, an upper surface of the substrate is provided with an anti-reflection film, and a lower surface of the substrate is provided with a filter film,
  • a first wavelength light wave is incident on the filter film and transmitted from the filter film;
  • a second wavelength light wave is incident on the filter film at a third predetermined angle and is transmitted from the filter film, the film transmitted from the filter film a second wavelength light wave is incident on the light redirecting portion, the light redirecting portion causing the second wavelength light wave to be incident on the filter film at a fourth predetermined angle;
  • the fourth wavelength is incident on the filter film at a fourth predetermined angle
  • the second wavelength light wave is reflected by the filter film and meets the first wavelength light wave transmitted from the filter film to realize multiplexing of the first wavelength light wave and the second wavelength light wave;
  • the third predetermined angle is different from the fourth predetermined angle, and the third predetermined angle is an incidence of the second wavelength light wave incident on the filter film when the filter film allows the second wavelength light wave to be transmitted. angle.
  • An optical add/drop multiplexer wherein the optical add/drop multiplexer is provided with the optical multiplexer provided by the present invention.
  • An optical multiplexing method comprising:
  • the second wavelength light incident on the light turning portion is incident on the filter film at a fourth predetermined angle by the light turning portion;
  • the second wavelength light wave incident at the fourth predetermined angle is reflected by the filter film, and the first wavelength light wave transmitted from the filter film is met to realize the first wavelength light wave and the second Multiplexing of wavelength light waves;
  • the third predetermined angle is different from the fourth predetermined angle, and the third predetermined angle is an incidence of the second wavelength light wave incident on the filter film when the filter film allows the second wavelength light wave to be transmitted. angle.
  • the optical multiplexing device and method and the optical add/drop multiplexing device provided by the embodiments of the present invention utilize the principle that the wavelength of the light wave allowed by the filter film is different when the light wave is incident at different angles, so that the light waves of different wavelengths are incident at different angles. And passing through the filter film to the light turning portion, the light turning portion changes the propagation direction of the light wave transmitted through the filtering film, and the light wave is no longer filtered by the incident angle when the incident angle is different from the transmitted angle.
  • the film is transmitted, but is reflected, so that light waves incident on the filter film at different angles can be merged into a bundle after being propagated between the light turning portion and the filter film, and the light is recovered at the same angle.
  • the waveguide technology is not relied on, which reduces the sensitivity of the device to temperature changes, and the multi-wavelength light wave can be realized by using an optical multiplexing device.
  • the use of the optical multiplexing device does not require serial connection, thereby saving material, reducing the size of the optical add/drop multiplex device, and simplifying Means, effectively increases the cost of the optical add-drop multiplexing device performance while reducing the optical add-drop multiplexer.
  • FIG. 1 is a schematic structural diagram of a light splitting device according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a principle of a light splitting device according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of another structure of a light splitting device according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of another structure of a light splitting device according to an embodiment of the present invention
  • FIG. 6 is a flow chart of a spectroscopic method according to an embodiment of the present invention
  • FIG. 7 is a flowchart of an optical multiplexing method according to an embodiment of the present invention. detailed description
  • An embodiment of the present invention provides a spectroscopic device. As shown in FIG. 1, an upper surface of the substrate 1 is provided with an anti-reflection film 2, and a lower surface of the substrate 1 is provided with a filter film 3; 4 is disposed opposite to the filter film 3.
  • the spectroscopic device utilizes the principle that the wavelength of the optical wave multiplexed by the optical signal multiplexed by the plurality of wavelengths of the light wave incident at different angles is different, that is, the optical signal multiplexed by the same plurality of wavelengths, along the optical signal
  • the wavelength of the light wave of the filter film is different.
  • the filter film allows the wavelength of the transmitted light wave to be ⁇ , and the filter film allows transmission as the incident angle increases.
  • the wavelength of the light wave will have a certain offset with respect to ⁇ . For example, Fig.
  • the actual laser generated may be 1549 ⁇ 155 lnm, but the light energy of the wavelength of 1550 nm is the largest, called the center wavelength, the wave in this paper.
  • the length refers to the center wavelength.
  • the optical signal L is incident on the filter film 3 at a first predetermined angle A1, wherein the first predetermined angle A1 is the filter film 3 allowing the first wavelength of the light wave.
  • the incident angle required for transmission of al that is, the incident angle at which the optical signal L is incident on the filter film 3, at this time, in the optical signal L, the first wavelength light wave a1 is transmitted out of the filter film 3, thereby realizing the first wavelength light wave.
  • Al is separated from the optical signal L, and the optical wave L1 other than the first wavelength light wave a1 in the optical signal L is reflected by the filter film 3 to the light turning portion 4, passes through the light turning portion 4, and is reflected to the light turning portion.
  • the light wave L1 of 4 is incident on the filter film 3 at a second predetermined angle A2, wherein the second predetermined angle A2 is different from the first predetermined angle A1, and the second predetermined angle A2 is when the filter film 3 allows the second wavelength light wave a2 to be transmitted.
  • the required incident angle that is, the incident angle at which the light wave L1 in the optical signal L is incident on the filter film 3, at this time, the second wavelength light wave a2 in the light wave L1 is transmitted out of the filter film 3, thereby realizing the second The wavelength light wave a2 is separated from the light signal L1. If the light signal L1 has a light wave L2 of another wavelength in addition to the second wavelength light wave a2, L2 is reflected by the filter film 3.
  • the filter film 3 can separate the first wavelength light wave al and the second wavelength light wave a2 among the plurality of wavelength light-multiplexed optical signals L, thereby separating the light waves of different wavelengths in the optical signal L.
  • the optical signal L is optically multiplexed by a plurality of wavelengths, and includes at least two optical waves of different wavelengths, and the optical waves L1 and L2 include optical waves of at least one wavelength.
  • the spectroscopic device utilizes the principle that when the optical signals multiplexed by a plurality of wavelengths are incident on the filter film at different angles, the wavelength of the optical wave that the filter film allows to transmit is different.
  • the light turning portion changes a propagation direction of the light wave reflected by the filter film or the light wave transmitted through the filter film, and causes the light wave whose propagation direction is changed to be re-incident to the filter at an angle different from the angle at which the filter film is reflected or transmitted. membrane.
  • light waves of different wavelengths can be transmitted from different positions of the same filter film through the light turning portion, thereby effectively separating the multiple light waves of different wavelengths.
  • the spectroscopic device provided by the embodiment of the invention can realize the separation of multi-wavelength light waves without the device, and does not need to perform the serial connection of the spectroscopic device, thereby saving materials, reducing the volume of the optical add/drop multiplex device, and simplifying
  • the package effectively improves the performance of the optical add/drop multiplexer and reduces the cost of the optical add/drop multiplexer.
  • the light turning portion 4 may be disposed on the upper surface side of the substrate 1 as in FIG.
  • the anti-reflection film 2 and the substrate 1 are disposed opposite to the filter film 3.
  • the light turning portion may be directly disposed on the antireflection film or may be disposed at a distance from the antireflection film.
  • the light turning portion 4 may be disposed on the lower surface side of the substrate 1 so as to be opposed to the filter film 3.
  • the optical signal L multiplexed by the plurality of wavelengths is incident on the filter film 3 at the first predetermined angle A1.
  • the first wavelength light wave a passes through the filter film 3 and the substrate 1, from the antireflection film. 2 is emitted, thereby realizing that the first wavelength light wave a1 is separated from the light signal L, and the light wave L1 other than the first wavelength light wave a1 no longer passes through the substrate 1, but is directly reflected by the filter film 3 to the light turning portion 4, The energy loss of the light wave L1 other than the first wavelength light wave a1 is reduced.
  • the light wave L1 reflected to the light turning portion 4 is incident on the filter film 3 at the second predetermined angle A2.
  • the second wavelength light wave a2 is transmitted through the filter film 3.
  • the substrate 1 is emitted from the antireflection film 2, so that the second wavelength light wave a2 is separated from the optical signal L1, and the light wave L2 other than the second wavelength light wave a2 is reflected by the filter film 3.
  • the light redirecting portion 4 is provided on the lower surface side of the substrate 1 and is disposed opposite to the filter film 3, the first wavelength light wave and the first of the optical signals L multiplexed by the plurality of wavelengths can be passed through the filter film 3.
  • the two-wavelength light wave a2 is separated, thereby separating the light waves of different wavelengths in the optical signal L.
  • the specific arrangement position of the light turning portion 4 is not limited by the present invention.
  • the number of light redirecting portions may also vary, but the light redirecting portions need to satisfy the fact that the light waves can be emitted from one of the light turning portions and then reflected by the filter film.
  • the next light turning portion, and so on, until the light wave is emitted from the last light turning portion to the filter film the present invention is not limited thereto.
  • the number of the light redirecting portions 4 when the number of the light redirecting portions 4 is 1, separation of two different wavelengths of light waves in the optical signal L can be achieved, except for the first wavelength light wave a1 and the second wavelength light wave a2 The other light wave L2 is reflected by the filter film 3.
  • one light turning portion can be added, and the light wave L2 is incident on the newly added light turning portion, and the newly added light is turned.
  • the portion L2 is incident on the filter film 3 at an angle at which the filter film 3 allows the light wave of the predetermined wavelength to pass therethrough, so that the light wave of the predetermined wavelength is transmitted out of the filter film 3 to be separated from the L2.
  • the number of light turning portions may be 1, 3 or 7.
  • the number of optical paths for optical add/drop multiplexing is four, and three light turning portions need to be provided in the present optical splitting device. It should be noted that when the light turning portions are two or more, the light turning portions should be spaced apart, and the light turning portions need to satisfy the fact that the light waves can be emitted from one of the light turning portions and then incident through the reflection of the filter film. To the next light turning portion, and so on, until the light wave is emitted from the last light turning portion to the filter film.
  • the light turning portion 4 is a mirror, and the mirror is disposed at a predetermined angle opposite to the substrate 1.
  • the mirror can be directly bonded to the substrate, or
  • the light redirecting portion 4 may be a reflective film formed directly on the substrate by a method such as plating, and the reflective film is disposed opposite to the filter film at a predetermined angle.
  • each of the mirrors is disposed at a predetermined angle with respect to the filter film, and the respective predetermined angles thereof may be the same or different, as long as the incident angle of the light wave of the wavelength to be separated is incident on the filter film is satisfied.
  • the present invention does not limit this.
  • the light turning portion 4 may be an optical device such as a lens or a prism that can change the direction of propagation of the light, which is not limited in the present invention.
  • the spectroscopic device of the present embodiment includes a substrate 1, an anti-reflection film 2 disposed on the upper surface of the substrate 1, and a filter film 3 disposed on the lower surface of the substrate 1, and a light turning portion 4,
  • the light turning portion 4 specifically includes mirrors 4-1, 4-2, and 4-3.
  • Each of the mirrors is spaced apart from the anti-reflection film 2 and the substrate 1 and disposed opposite to the filter film 3.
  • the mirrors are spaced apart so that light waves can be emitted from one of the mirrors and then reflected by the filter film to be incident on the next reflection. mirror.
  • the angle of the mirror 4-1 and the filter film 3 is 0.88 degrees
  • the angle of the mirror 4-2 and the filter film 3 is 0.57 degrees
  • the angle of the mirror 4-3 and the filter film 3 is 0.46 degrees
  • the reflected light wave is incident on the anti-reflection film 2 through the substrate 1, and is incident on the reflection mirror 4 through the anti-reflection film 2, and is reflected by the reflection mirror 4-1 and then incident on the filter film 3 again.
  • the light wave L33 having a wavelength of 1548.13 nm can be separated by the filter film 3, and the undivided light wave is reflected by the filter film 3 to the mirror 4-3; after being reflected by the mirror 4-3, it is incident to
  • the light wave L44 having a wavelength of 1547.33 nm can be separated by the filter film 3, and other wavelengths are Waves reflected by the filter membrane 3 and is emitted from the spectroscope device.
  • the angle between each mirror and the filter film is determined according to the wavelength of the light wave to be separated and the incident angle requirement of the light wave incident on the filter film, and the number of the mirror is as needed.
  • the number of the separated light waves is determined.
  • the angle between the mirrors and the filter film and the number of the mirrors can be adjusted according to the needs of the light splitting, which is not limited in the present invention.
  • the optical path is reversible, that is, when the propagation directions of the light waves in the spectroscopic device in the above embodiment are all reversed, the multiplexing of the multi-path optical waves of different wavelengths can be realized.
  • an embodiment of the present invention further provides an optical multiplexing device.
  • the structural features of the optical multiplexing device are the same as those of the optical splitting device provided by the embodiment of the present invention, and all the structural features of the optical splitting device provided by the embodiment of the present invention are applicable to the optical multiplexing device provided by the embodiment of the present invention. .
  • the optical multiplexing device in this embodiment includes a substrate 1, an upper surface of the substrate 1 is provided with an anti-reflection film 2, and a lower surface of the substrate 1 is provided with a filter film 3, and the light is turned.
  • the portion 4 is disposed opposite to the filter film 3;
  • the first wavelength light wave b1 is incident on the filter film 3 and transmitted from the filter film 3; the second wavelength light wave b2 is incident on the filter film at a third predetermined angle and transmitted from the filter film 3, and the second wavelength light wave transmitted from the filter film 3 B2 is incident on the light redirecting portion 4, and the light redirecting portion 4 causes the second wavelength wave b2 light to enter the filter film 3 at a fourth predetermined angle; and enters the filter film 3 at a fourth predetermined angle.
  • the second wavelength light wave b2 is reflected by the filter film 3 and meets the first wavelength light wave b1 transmitted from the filter film 3, thereby achieving multiplexing of the first wavelength light wave bl and the second wavelength light wave b2; wherein, the third predetermined angle is The fourth predetermined angle is different, and the third predetermined angle is an incident angle at which the second wavelength light wave is incident on the filter film 3 when the filter film 3 allows the second wavelength light wave b2 to be transmitted. Because the fourth predetermined angle is different from the third predetermined angle, when the second wavelength light wave b2 is incident on the filter film at the fourth predetermined angle, it cannot be transmitted by the filter film, and can only be reflected, so that it can be combined with the first Wavelength waves meet and are multiplexed.
  • the optical multiplexing device utilizes the principle that the wavelength of the light wave allowed by the filter film is different when the light wave is incident at different angles, so that light waves of different wavelengths are incident at different angles and are transmitted through the filter film to be incident on the light.
  • the light redirecting portion changes a propagation direction of a light wave transmitted through the filter film and is incident on the filter film again at an incident angle different from an incident angle when the filter film is transmitted. Since the incident angle at this time is different from that when it is transmitted, the light wave is no longer transmitted by the filter film, but is reflected, so that light waves incident on the filter film at different angles pass through the light turning portion and the filter film.
  • the optical multiplexing device After the propagation between the two, it can be merged into a bundle and emitted from the optical multiplexing device at the same angle. It not only effectively realizes the multiplexing of multiple wavelengths of different wavelengths, but also does not rely on the waveguide technology, which reduces the temperature of the device.
  • the sensitivity of the change, and the multiplexing of the multi-wavelength light waves can be realized by using one optical multiplexing device, and the serial connection of the optical multiplexing device is not required, thereby saving materials and reducing the volume of the optical add/drop multiplexing device, and
  • the package is simplified, the performance of the optical add/drop multiplexer device is effectively improved, and the cost of the optical add/drop multiplexer device is reduced.
  • the first wavelength light wave a1 and the second wavelength light wave a2 are incident on the filter film 3 from the respective original exit points in FIG. 1, respectively.
  • the wavelength light wave a1 is transmitted from the filter film 3, and the second wavelength light wave a2 is transmitted from the filter film 3 and incident on the light turning portion 4, and the second wavelength light wave a2 is transmitted through the second wavelength light wave a2 by the light turning portion 4.
  • the optical splitting device provided by the present invention can not only realize the optical splitting function but also realize the optical multiplexing function; similarly, the optical multiplexing device can not only realize the optical multiplexing function but also realize the splitting function. Therefore, in an embodiment of the present invention, for a light splitting device or an optical multiplexing device, it can be used only to implement the splitting function or the optical multiplexing function, and can also be used to simultaneously implement the splitting and optical multiplexing functions. This is not a limitation.
  • the embodiment of the present invention further provides an optical add-drop multiplexer (OADM), and the optical add/drop device provided by the embodiment of the present invention is provided in the add/drop multiplexer.
  • OADM optical add-drop multiplexer
  • the optical add/drop multiplexer provided by the embodiment of the present invention utilizes the principle that when the optical signals multiplexed by a plurality of wavelengths are incident at different angles, the wavelength of the optical wave that the filter film allows to transmit is different, and the light turning portion is adopted.
  • the light wave reflected by the filter film or the propagation direction of the light wave transmitted through the filter film is changed, and the light wave whose propagation direction is changed is re-incident to the filter film at an angle different from the angle at which the filter film is reflected or transmitted.
  • light waves of different wavelengths can be transmitted from different positions of the same filter film through the light turning portion, thereby effectively separating the multiple light waves of different wavelengths; and according to the reversibility of the light path, the separated light waves can be separated.
  • the multiplexing of light waves of different wavelengths can be realized at the incident of the original optical signal.
  • the optical add/drop multiplexer provided by the embodiment of the present invention reduces the sensitivity to temperature changes by not relying on the waveguide technology, and can realize separation and multiplexing of multi-wavelength light waves by using one filter film, without The serial connection of the optical path between the filter films is performed, thereby saving materials, reducing the volume of the optical add/drop multiplexer, and simplifying the package, effectively improving the performance of the optical add/drop multiplexer and reducing the optical add/drop multiplexing.
  • the cost of the equipment correspondingly, as shown in FIG. 6, the embodiment of the present invention further provides a spectroscopic method, including:
  • the first wavelength light wave in the optical signal is transmitted by the filter film through the filter film, so that the first wavelength light wave is separated from the optical signal, and the optical signal is divided into Light waves other than the first wavelength light wave are reflected by the filter film to the light turning portion;
  • the light wave reflected by the filter film to the light turning portion is incident on the filter film at a second predetermined angle by the light turning portion;
  • the second predetermined angle is different from the first predetermined angle
  • the first predetermined angle is an incident angle at which the optical signal is incident on the filter film when the filter film allows transmission of a first wavelength light wave.
  • the second predetermined angle is an incident angle at which the optical signal is incident on the filter film when the filter film allows transmission of a second wavelength light wave.
  • the light wave or the propagation direction of the light wave transmitted through the filter film is changed, and the light wave whose propagation direction is changed is re-incident to the filter film at an angle different from the angle at which the filter film is reflected or transmitted.
  • the spectroscopic method provided by the embodiment of the invention reduces the sensitivity of the optical add/drop multiplexer to temperature changes, and at the same time, the separation of multi-wavelength light waves can be realized by using one spectroscopic device, and the spectroscopic device is not required.
  • the serial connection saves materials, reduces the size of the optical add/drop multiplexer, and simplifies the packaging, effectively improving the performance of the optical add/drop multiplexer and reducing the cost of the optical add/drop multiplexer.
  • the light wave reflected by the filter film to the light turning portion is incident on the filter film at a second predetermined angle by the light turning portion.
  • an embodiment of the present invention further provides an optical multiplexing method, as shown in FIG. 7, including:
  • the first wavelength light wave is transmitted from the filter film through the filter film, and the second wavelength light wave is transmitted from the filter film and incident on the light turning portion;
  • the second wavelength light incident on the light turning portion is incident on the filter film at a fourth predetermined angle by the light turning portion;
  • the second wavelength light wave incident at the fourth predetermined angle is reflected by the filter film, and then meets the first wavelength light wave transmitted from the filter film to implement the first wavelength light wave and the Multiplexing of second wavelength light waves.
  • the third predetermined angle is different from the fourth predetermined angle, and the third predetermined angle is an incidence of the second wavelength light wave incident on the filter film when the filter film allows the second wavelength light wave to be transmitted. angle. Because the fourth specified angle is different from the third specified angle, When the second wavelength light is incident on the filter film at the fourth predetermined angle, it cannot be transmitted by the filter film and can only be reflected.
  • the optical multiplexing method provided by the embodiment of the present invention utilizes the principle that the wavelength of the light wave allowed by the filter film is different when the light wave is incident at different angles, so that light waves of different wavelengths are incident at different angles and are transmitted through the filter film to be incident on the light.
  • the light redirecting portion changes a propagation direction of a light wave transmitted through the filter film and is incident on the filter film again at an incident angle different from an incident angle when the filter film is transmitted. Since the incident angle at this time is different from that when it is transmitted, the light wave is no longer transmitted by the filter film, but is reflected, so that light waves incident on the filter film at different angles pass through the light turning portion and the filter film.
  • the optical multiplexing device After being propagated, it can be merged into a bundle and emitted from the optical multiplexing device at the same angle. It not only effectively realizes the multiplexing of multiple wavelengths of different wavelengths, but also does not rely on waveguide technology, which reduces the temperature variation of the device. Sensitivity, at the same time, the multiplexing of multi-wavelength light waves can be realized by using one optical multiplexing device, and the serial connection of the optical multiplexing device is not required, thereby saving materials, reducing the volume of the optical add/drop multiplexing device, and simplifying The package effectively improves the performance of the optical add/drop multiplexer and reduces the cost of the optical add/drop multiplexer.
  • the second wavelength light incident on the light redirecting portion is incident on the filter film at a fourth predetermined angle by the light turning portion, and the incident portion may be incident on the light turning portion through a mirror or a reflective film.
  • the second wavelength light wave is reflected such that the second wavelength light wave is incident on the filter film at a fourth predetermined angle.

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Abstract

本发明的实施例提供了一种分光装置、光复用装置及方法、光分插复用设备，涉及光通信技术领域，为提高性能降低成本而发明。所述分光装置，包括基片、所述基片的上表面设置有增透膜，所述基片的下表面设置有滤波膜，还包括与所述滤波膜相对设置的光转向部；光信号以第一规定角度入射至所述滤波膜，所述光信号中的第一波长光波被所述滤波膜透射，以使所述第一波长光波从所述光信号中分离，而除所述第一波长光波以外的光波被所述滤波膜反射至所述光转向部，所述光转向部使所述反射至所述光转向部的光波以第二规定角度入射至所述滤波膜，所述光信号中的第二波长光波被所述滤波膜透射，以使所述第二波长光波从所述光信号中分离。本发明可用于光通信中。

Description

分光装置、 光复用装置及方法、 光分插复用设备 技术领域
本发明涉及光通信技术领域， 尤其涉及一种分光装置、 光复用装 置及方法、 光分插复用设备。 背景技术
光通信在现代通信技术中发挥着越来越重要的作用。 在光传输的 上行、 节点和下行处， 均需要对不同波长的光进行分离或复用， 以实现 不同波长的光信号的上传和下载。
现有技术中， 主要釆用串接分离器件的方法， 或者釆用阵列波导 光栅 AWG ( Array Waveguide Grating ) 技术来实现上述对不同波长的 光进行分离或复用。
串接分离器件的方法釆用滤光片技术， 通过一个三端口的器件能 够从一路多个波长光波复用的光信号中分离出某个特定波长的光波，或 者将某个特定波长的光波与入射的光波复用。当需要分离或复用多个波 长的光波时， 则需要将多个三端口的器件通过光纤进行串接。 由于需要 进行光纤串接，光纤固有的盘纤空间会导致整个光分插复用设备的体积 较大而性能较差；又由于每一路光的分插复用都需要一个三端口的器件 来实现， 在通道数较多时， 成本较高。
而 AWG技术主要利用波导技术，使不同波长的光经过不同的路径 后， 在不同的侧出射处形成能量集中， 由此使不同波长的光分离。 这种 光分插复用设备对温度敏感而性能参数较差， 需要用电控制的加热器； 而且 AWG芯片制作较昂贵， 成本较高。 发明内容
本发明的实施例提供了分光装置、 光复用装置及方法、 光分插复 用设备，能够提高光分插复用设备的性能同时降低光分插复用设备的成 本。
为达到上述目的， 本发明的实施例釆用如下技术方案： 一种分光装置， 包括基片、 所述基片的上表面设置有增透膜， 所 述基片的下表面设置有滤波膜， 还包括与所述滤波膜相对设置的光转 向部；
光信号以第一规定角度入射至所述滤波膜， 所述光信号中的第一 波长光波被所述滤波膜透射，以使所述第一波长光波从所述光信号中分 离，而除所述第一波长光波以外的光波被所述滤波膜反射至所述光转向 部，所述光转向部使所述反射至所述光转向部的光波以第二规定角度入 射至所述滤波膜， 所述光信号中的第二波长光波被所述滤波膜透射， 以 使所述第二波长光波从所述光信号中分离；
其中， 所述第二规定角度与所述第一规定角度不同， 所述第一规 定角度为所述滤波膜允许第一波长光波透射时，所述光信号入射至所述 滤波膜的入射角，所述第二规定角度为所述滤波膜允许第二波长光波透 射时， 所述光信号入射至所述滤波膜的入射角。 一种光分插复用设备， 所述光分插复用设备中设置有本发明提供 的分光装置。 一种分光方法， 包括：
接收光信号， 使所述光信号以第一规定角度入射至滤波膜； 通过所述滤波膜使所述光信号中的第一波长光波被所述滤波膜透 射， 以使所述第一波长光波从所述光信号中分离，使所述光信号中除所 述第一波长光波以外的光波被所述滤波膜反射至光转向部；
通过所述光转向部使所述被所述滤波膜反射至所述光转向部的光 波以第二规定角度入射至所述滤波膜；
通过所述滤波膜使所述光信号中的第二波长光波被所述滤波膜透 射， 以使所述第二波长光波从所述光信号中分离；
其中， 所述第二规定角度与所述第一规定角度不同， 所述第一规 定角度为所述滤波膜允许第一波长光波透射时，所述光信号入射至所述 滤波膜的入射角，所述第二规定角度为所述滤波膜允许第二波长光波透 射时， 所述光信号入射至所述滤波膜的入射角。
本发明的实施例提供的分光装置及方法、 光分插复用设备， 利用 了当一多个波长光波复用的的光信号以不同角度入射至滤波膜时，滤波 膜允许透射的光波的波长不同的原理，通过光转向部将被滤波膜反射的 光波或者透过滤波膜的光波的传播方向改变，并使传播方向被改变了的 光波以与从滤波膜反射或透射时的角度不同的角度重新入射至该滤波 膜。这样就能使不同波长的光波通过光转向部分别从同一滤波膜的不同 位置透过，有效实现了不同波长的多路光波的分离。本发明实施例提供 由于利用一个分光装置即可实现多波长光波的分离，而不需要进行分光 装置的串接， 因此节省了材料、 减小了光分插复用设备的体积， 且简化 了封装，有效提高了光分插复用设备的性能同时降低了光分插复用设备 的成本。 一种光复用装置， 包括基片、 所述基片的上表面设置有增透膜， 所述基片的下表面设置有滤波膜，
还包括与所述滤波膜相对设置的光转向部；
第一波长光波入射至所述滤波膜并从所述滤波膜透射； 第二波长 光波以第三规定角度入射至所述滤波膜并从所述滤波膜透射，从所述滤 波膜透射的所述第二波长光波入射至所述光转向部，所述光转向部使所 述第二波长光波以第四规定角度入射至所述滤波膜；所述以第四规定角 度入射至所述滤波膜的第二波长光波被所述滤波膜反射，与从所述滤波 膜透射的所述第一波长光波相遇，以实现所述第一波长光波与所述第二 波长光波的复用；
其中， 所述第三规定角度与所述第四规定角度不同， 所述第三规 定角度为所述滤波膜允许第二波长光波透射时，所述第二波长光波入射 至所述滤波膜的入射角。 一种光分插复用设备， 所述光分插复用设备中设置有本发明提供 的光复用装置。 一种光复用方法， 包括：
分别接收第一波长光波和第二波长光波， 使所述第一波长光波入 射至所述滤波膜，使所述第二波长光波以第三规定角度入射至所述滤波 膜； 通过所述滤波膜使所述第一波长光波从所述滤波膜透射， 使所述 第二波长光波从所述滤波膜透射并入射至光转向部；
通过所述光转向部使所述入射至所述光转向部的第二波长光波以 第四规定角度入射至所述滤波膜；
通过所述滤波膜使所述以第四规定角度入射的第二波长光波被反 射后， 与从所述滤波膜透射的第一波长光波相遇， 以实现所述第一波长 光波与所述第二波长光波的复用；
其中， 所述第三规定角度与所述第四规定角度不同， 所述第三规 定角度为所述滤波膜允许第二波长光波透射时，所述第二波长光波入射 至所述滤波膜的入射角。
本发明实施例提供的光复用装置及方法、 光分插复用设备， 利用 了光波以不同角度入射时， 滤波膜允许透射的光波的波长不同的原理， 使不同波长的光波以不同的角度入射并透过滤波膜而入射至光转向部， 所述光转向部使透射过滤波膜的光波的传播方向发生改变进而以与被 的入射角已经与被透射时不同， 光波不再被所述滤波膜透射， 而是被反 射， 这样， 以不同角度入射至所述滤波膜的光波， 经过在光转向部和滤 波膜之间的传播后， 最终能被汇成一束， 以同样的角度从光复用装置射 出，不仅有效实现了不同波长的多路光波的复用，还不依赖于波导技术， 降低了设备对温度变化的敏感性，同时由于利用一个光复用装置即可实 现多波长光波的复用，不需要进行光复用装置的串接，因此节省了材料、 减小了光分插复用设备的体积， 且简化了封装，有效提高了光分插复用 设备的性能同时降低了光分插复用设备的成本。 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性的前提下，还可以根据这些附图 获得其他的附图。
图 1为本发明实施例提供的分光装置的一种结构示意图；
图 2为本发明实施例提供的分光装置的一种原理示意图； 图 3为本发明实施例提供的分光装置的另一种结构示意图； 图 4为本发明实施例提供的分光装置的另一种结构示意图； 图 5为本发明实施例提供的光复用装置的一种结构示意图； 图 6为本发明实施例提供的分光方法的一种流程图；
图 7为本发明实施例提供的光复用方法的一种流程图。 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 术人员在没有做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。
本发明的实施例提供了一种分光装置， 如图 1所示， 包括基片 1、 基片 1的上表面设置增透膜 2 , 基片 1的下表面设置有滤波膜 3 ; 光转 向部 4与滤波膜 3相对设置。
本发明实施例提供的分光装置利用了滤波膜对于不同角度入射的 多个波长光波复用的光信号允许透射的光波的波长不同的原理，即同一 多个波长光波复用的光信号， 沿不同的角度入射至滤波膜时， 通过滤波 膜的光波的波长不同的原理而设计。例如， 一多个波长光波复用的光信 号以 0度入射角射入一滤波膜时 ,该滤波膜允许透射的光波的波长为 λ, 则随着入射角的增大，该滤波膜允许透射的光波的波长相对于 λ将有一 定的偏移量。 举例说明， 图 2示出了某滤波膜相对于波长为 1550nm的 光波的透射波长偏移量与入射角度的对应关系。如图 2所示， 当光波的 入射角为 0度时，透射光波的波长无偏移， 即滤波膜允许透射的光波的 波长为 1550nm ; 当光波的入射角为 1.8 度时， 透射光波的波长有 0.275nm 的偏移， 则滤波膜允许透射的光波的波长为 1550-0.275 = 1549.725nm; 此时， 除波长为 1549.725nm的光波能透射出滤波膜外， 其他波长的光波均会被反射。
需要说明的是， 实际应用中， 无法产生只具有单一波长的电磁波。 即使是纯度最高的激光， 也有一定的波长分布范围。 例如， 如果需要产 生波长为 1550nm的激光， 那么实际产生的也许是 1549 ~ 155 lnm的激 光， 只是 1550nm这个波长的光能量最大， 称为中心波长， 本文中的波 长均指中心波长。
根据上述原理， 如图 1 所示， 本发明实施例提供的分光装置， 光 信号 L以第一规定角度 A1入射至滤波膜 3 , 其中， 第一规定角度 A1 为滤波膜 3允许第一波长光波 al透射时所需要的入射角， 即需要光信 号 L入射至滤波膜 3的入射角， 此时， 在光信号 L中， 第一波长光波 al透射出滤波膜 3 , 从而实现了第一波长光波 al从光信号 L中分离， 而在光信号 L中除第一波长光波 al 以外的光波 L1被滤波膜 3反射至 光转向部 4, 经过光转向部 4 的作用后， 使反射至光转向部 4 的光波 L1以第二规定角度 A2入射至滤波膜 3 , 其中， 第二规定角度 A2与第 一规定角度 A1不同， 第二规定角度 A2为滤波膜 3允许第二波长光波 a2透射时， 所需要的入射角， 即需要光信号 L中的光波 L1入射至滤波 膜 3的入射角，此时，在光波 L1中的第二波长光波 a2透射出滤波膜 3 , 从而实现了第二波长光波 a2从光信号 L1 中分离， 如果此时光信号 L1 中除第二波长光波 a2以外还具有其他波长的光波 L2 , L2将被滤波膜 3 反射。
这样， 通过滤波膜 3 即可把多个波长光波复用的光信号 L中的第 一波长光波 al和第二波长光波 a2分离出来，从而实现将光信号 L中不 同波长的光波分离。
需要说明的是， 光信号 L是多个波长光波复用的， 包括至少两个 不同波长的光波， 而光波 L1和光波 L2包括至少一个波长的光波。
综上所述， 本发明的实施例提供的分光装置， 利用了当一多个波 长光波复用的光信号以不同角度入射至滤波膜时，滤波膜允许透射的光 波的波长不同的原理，通过光转向部将被滤波膜反射的光波或者透过滤 波膜的光波的传播方向改变，并使传播方向被改变了的光波以与从滤波 膜反射或透射时的角度不同的角度重新入射至该滤波膜。这样就能使不 同波长的光波通过光转向部分别从同一滤波膜的不同位置透过，有效实 现了不同波长的多路光波的分离。本发明实施例提供的分光装置， 因不 装置即可实现多波长光波的分离， 而不需要进行分光装置的串接， 因此 节省了材料、 减小了光分插复用设备的体积， 且简化了封装， 有效提高 了光分插复用设备的性能同时降低了光分插复用设备的成本。
可选的， 光转向部 4可以像图 1那样， 设置在基片 1的上表面侧， 间隔增透膜 2和基片 1与滤波膜 3相对设置。 这时， 具体的， 在本发明 的一个实施例中， 光转向部可以直接设置于增透膜上，也可以与增透膜 间隔一定距离而设置。
可选的， 如图 3所示， 光转向部 4也可以设置在基片 1 的下表面 侧， 与滤波膜 3相对设置。 多个波长光波复用的光信号 L以第一规定 角度 A1入射至滤波膜 3 , 此时， 在光信号 L中， 第一波长光波 al透过 滤波膜 3和基片 1 , 从增透膜 2射出， 从而实现了第一波长光波 al从 光信号 L中分离，而除第一波长光波 al以外的光波 L1不再经过基片 1 , 而是直接被滤波膜 3反射至光转向部 4 , 减小了除第一波长光波 al 以 外的光波 L1的能量损耗。 经过光转向部 4的作用后， 使反射至光转向 部 4的光波 L1 又以第二规定角度 A2入射至滤波膜 3 , 此时， 在光波 L1中， 第二波长光波 a2透过滤波膜 3和基片 1 , 从增透膜 2射出， 从 而实现了第二波长光波 a2从光信号 L1 中分离， 而除第二波长光波 a2 以外的光波 L2被滤波膜 3反射。 这样， 光转向部 4设置在基片 1的下 表面侧， 与滤波膜 3相对设置时，通过滤波膜 3也可把多个波长光波复 用的光信号 L中的第一波长光波 al和第二波长光波 a2分离出来，从而 实现将光信号 L中不同波长的光波分离。
对光转向部 4的具体设置位置， 本发明不做限制。
具体的， 根据需要分离的光波的数量的不同， 光转向部的数量也 可以随之变化，但光转向部之间需要满足光波能够从其中一个光转向部 射出后经滤波膜的反射而入射至下一个光转向部， 以此类推， 直到光波 从最后一个光转向部射出至滤波膜， 本发明对此不做限制。 具体的， 如 图 1所示， 当光转向部 4的数量为 1 时， 可以实现对光信号 L中， 两 路不同波长的光波的分离， 而除第一波长光波 al、 第二波长光波 a2以 外的光波 L2被滤波膜 3反射， 此时如果还需要分离 L2中某规定波长 的光波， 则可以再增加一个光转向部， 使光波 L2入射至新增的光转向 部， 新增加的光转向部使 L2以滤波膜 3允许该规定波长的光波透过的 角度入射至滤波膜 3 , 即可使该规定波长的光波透射出滤波膜 3 , 以使 其从 L2中被分离。 可见， 实现三路光分插复用需要 2个光转向部， 而 实现四路光分插复用需要 3个光转向部 ... ...由此，光转向部的数量比需 要分离的光波的数量小 1即可。
因为在光通信系统中， 通常应用 2路或 4路或 8路光波分离或复 用， 优选的， 光转向部的数量可以为 1、 3或 7。 例如， 在本发明的一 个实施例中， 光分插复用的光路数量为四路， 则在本分光装置中需要设 置三个光转向部。 需要说明的是， 当光转向部为两个或两个以上时， 这 些光转向部应间隔分布，光转向部之间需要满足光波能够从其中一个光 转向部射出后经滤波膜的反射而入射至下一个光转向部， 以此类推， 直 到光波从最后一个光转向部射出至滤波膜。
具体的， 在本发明的一个实施例中， 光转向部 4 为反射镜， 该反 射镜与基片 1成规定角度相对设置，可选的，反射镜可直接与基片粘接， 也可与基片分离设置； 或者， 光转向部 4也可以为通过镀膜等方法直接 在基片上形成的反射膜，反射膜以规定角度与滤波膜相对设置。 需要说 明的是，每个反射镜都与滤波膜成规定角度相对设置， 而其各自的规定 角度可以相同， 也可以不同， 只要满足需要分离的波长的光波入射至滤 波膜的入射角的要求即可， 本发明对此不做限制。
可以理解的， 除了反射镜之外， 光转向部 4 还可以为其它能改变 光的传播方向的透镜或棱镜等光学装置， 本发明对此不做限制。
下面通过具体实施例对本发明提供的分光装置做详细说明， 需要 说明的是， 上述实施例的所有特征均适用于本实施例。
如图 4所示， 本实施例的分光装置， 包括基片 1、 设置在基片 1上 表面的增透膜 2和设置在基片 1下表面的滤波膜 3 ;还包括光转向部 4 , 本实施例中， 光转向部 4具体包括反射镜 4- 1、 4-2和 4-3。 各反射镜间 隔增透膜 2和基片 1 , 与滤波膜 3相对设置， 各反射镜之间间隔分布， 以使光波能够从其中一个反射镜射出后经滤波膜的反射而入射至下一 个反射镜。
其中，反射镜 4-1与滤波膜 3的角度为 0.88度，反射镜 4-2与滤波 膜 3的角度为 0.57度， 反射镜 4-3与滤波膜 3的角度为 0.46度；
光信号 L先透过增透膜 2射入基片 1 , 并以 1.8度的入射角入射至 滤波膜 3 , 如图 2可知， 对于滤波膜 3 , 入射角度 1.8度对应的透射波 长的偏移量为 0.275nm, 则入射角为 1.8度时， 滤波膜 3允许透射的光 波的波长为 1550-0.275 =1549.725nm , 因此， 光信号 L 中， 波长为 1549.725nm的光波 L1 1 透过滤波膜 3 , 而其它波长的光波被滤波膜 3 反射。 被反射的光波经基片 1入射至增透膜 2 , 并穿过增透膜 2入射至 反射镜 4- 1 , 经过反射镜 4- 1 的反射后再次入射至滤波膜 3 , 则此时的 入射角为 1.8+2 0.88=3.56度，光波 L以该入射角入射至滤波膜 3时透 射波长的偏移量为 1.075nm, 则此时滤波膜 3允许透射的光波的波长为 1550-1.075=1548.925nm, 因此， 光信号 L中， 波长为 1548.925nm的光 波 L22透射出滤波膜 3从而被分离， 而未被分离的光波被滤波膜 3反 射至反射镜 4-2; 同样道理， 经过反射镜 4-2反射后入射至滤波膜 3的 光波的入射角度为 3.56+2 X 0.57=4.7 度， 其透射波长的偏移量为 1.87nm,则此时滤波膜 3允许透射的光波波长为 1550- 1.87=1548.13nm, 因此波长为 1548.13nm的光波 L33能透过滤波膜 3从而被分离， 未被 分离的光波被滤波膜 3反射至反射镜 4-3 ; 经过反射镜 4-3反射后入射 至滤波膜 3的光波的入射角度为 4.7+2 x 0.46=5.62度，其透射波长的偏 移量为 2.67nm , 则此时滤波膜 3 允许透射的光波的波长为 1550-2.67=1547.33nm, 因此波长为 1547.33nm的光波 L44能透过滤波 膜 3从而被分离，而其它波长的光波被滤波膜 3反射并从分光装置射出。
需要说明的是， 本实施例中各反射镜与滤波膜的夹角是根据需要 分离的光波的波长及该波长光波入射至滤波膜的入射角要求而确定的， 而反射镜的数量是根据需要分离的光波的数量而确定，在本发明的其它 实施例中，各反射镜与滤波膜的夹角及反射镜的数量都可以根据分光的 需要进行调整， 本发明对此不做限制。 显而易见的， 由于光路具有可逆性， 即当上述实施例中的分光装 置中光波的传播方向全部逆转时， 即可实现不同波长的多路光波的复 用。 根据上述原理， 相应的， 本发明实施例还提供了一种光复用装置。 其中， 所述光复用装置的结构特征与本发明实施例提供的分光装置相 同， 而且， 对于上述本发明实施例提供的分光装置的一切结构特征， 均 适用于本发明实施例提供的光复用装置。
具体的， 如图 5所示， 本实施例中的光复用装置， 包括基片 1、 基 片 1的上表面设置有增透膜 2 , 基片 1的下表面设置有滤波膜 3 , 光转 向部 4与滤波膜 3相对设置；
第一波长光波 bl入射至滤波膜 3并从滤波膜 3透射； 第二波长光 波 b2以第三规定角度入射至所述滤波膜并从滤波膜 3透射， 从滤波膜 3透射的第二波长光波 b2入射至光转向部 4 ,光转向部 4使第二波长波 b2光以第四规定角度入射至滤波膜 3 ; 以第四规定角度入射至滤波膜 3 的第二波长光波 b2被滤波膜 3反射， 与从滤波膜 3透射的第一波长光 波 bl相遇， 进而实现第一波长光波 bl与第二波长光波 b2的复用； 其中， 第三规定角度与第四规定角度不同， 第三规定角度为滤波 膜 3允许第二波长光波 b2透射时， 第二波长光波入射至滤波膜 3的入 射角。 正因为第四规定角度与第三规定角度不同， 当第二波长光波 b2 以第四规定角度入射至所述滤波膜时， 不能被所述滤波膜透射， 只能被 反射， 从而能与第一波长光波相遇并复用。
本发明实施例提供的光复用装置， 利用了光波以不同角度入射时， 滤波膜允许透射的光波的波长不同的原理，使不同波长的光波以不同的 角度入射并透过滤波膜而入射至光转向部，所述光转向部使透射过滤波 膜的光波的传播方向发生改变进而以与被滤波膜透射时的入射角不同 的入射角再次入射至所述滤波膜。由于此时的入射角已经与被透射时不 同， 光波不再被所述滤波膜透射， 而是被反射， 这样， 以不同角度入射 至所述滤波膜的光波， 经过在光转向部和滤波膜之间的传播后， 最终能 被汇成一束， 以同样的角度从光复用装置射出， 不仅有效实现了不同波 长的多路光波的复用，还不依赖于波导技术， 降低了设备对温度变化的 敏感性， 同时由于利用一个光复用装置即可实现多波长光波的复用， 不 需要进行光复用装置的串接， 因此节省了材料、减小了光分插复用设备 的体积， 且简化了封装，有效提高了光分插复用设备的性能同时降低了 光分插复用设备的成本。
而根据光路的可逆性， 如果图 1所示的实施例提供的分光装置中， 第一波长光波 al、 第二波长光波 a2分别从图 1中各自的原出射点入射 至滤波膜 3 , 第一波长光波 al从滤波膜 3透射， 第二波长光波 a2从滤 波膜 3透射并入射至光转向部 4 , 通过所述光转向部 4使第二波长光波 a2以与第二波长光波 a2被透射时不同的入射角入射至滤波膜 3 , 被滤 波膜 3反射后， 与透射后第一波长光波 al相遇， 从而实现了第一波长 光波 al和第二波长光波 a2的复用， 即能实现光复用装置的功能。
可见， 由于光路的可逆性， 本发明提供的分光装置不仅能够实现 分光功能， 也能够实现光复用功能； 同理， 光复用装置不仅能实现光复 用功能， 也能实现分光功能。 因此， 在本发明的实施例中， 对于一个分 光装置或光复用装置来讲， 它既可以仅用来实现分光功能或光复用功 能， 也可以用来同时实现分光和光复用功能， 本发明对此不做限制。 相应的， 本发明实施例还提供了一种光分插复用设备 OADM (Optical Add-Drop Multiplexer) , 该分插复用设备中设置有本发明实施例提供的分光 装置或光复用装置。
本发明的实施例提供的光分插复用设备， 利用了当一多个波长光 波复用的光信号以不同角度入射时，滤波膜允许透射的光波的波长不同 的原理，通过光转向部将被滤波膜反射的光波或者透过滤波膜的光波的 传播方向改变，并使传播方向被改变了的光波以与从滤波膜反射或透射 时的角度不同的角度重新入射至该滤波膜。这样就能使不同波长的光波 经光转向部作用后分别从同一滤波膜的不同位置透过，有效实现了不同 波长的多路光波的分离；同时根据光路的可逆性， 上述被分离的光波可 沿原路返回， 此时即可在原光信号的入射处实现不同波长光波的复用。 本发明实施例提供的光分插复用设备，因不依赖于波导技术而降低了对 温度变化的敏感性，同时由于利用一个滤波膜即可实现多波长光波的分 离和复用， 而不需要进行滤波膜间光路的串接， 因此节省了材料、 减小 了光分插复用设备的体积， 且简化了封装，有效提高了光分插复用设备 的性能同时降低了光分插复用设备的成本。 相应的， 如图 6 所示， 本发明实施例还提供了一种分光方法， 包 括：
51 1 , 接收光信号， 使所述光信号以第一规定角度入射至滤波膜；
512 , 通过所述滤波膜使所述光信号中的第一波长光波被所述滤波 膜透射， 以使所述第一波长光波从所述光信号中分离，使所述光信号中 除所述第一波长光波以外的光波被所述滤波膜反射至光转向部；
513 , 通过所述光转向部使所述被所述滤波膜反射至所述光转向部 的光波以第二规定角度入射至所述滤波膜；
514 , 通过所述滤波膜使所述光信号中的第二波长光波被所述滤波 膜透射， 以使所述第二波长光波从所述光信号中分离；
其中， 所述第二规定角度与所述第一规定角度不同， 所述第一规 定角度为所述滤波膜允许第一波长光波透射时，所述光信号入射至所述 滤波膜的入射角，所述第二规定角度为所述滤波膜允许第二波长光波透 射时， 所述光信号入射至所述滤波膜的入射角。 本发明的实施例提供的分光方法， 利用了当一多个波长光波复用 的光信号以不同角度入射时， 滤波膜允许透射的光波的波长不同的原 理，通过光转向部将被滤波膜反射的光波或者透过滤波膜的光波的传播 方向改变，并使传播方向被改变了的光波以与从滤波膜反射或透射时的 角度不同的角度重新入射至该滤波膜。这样就能使不同波长的光波经光 转向部作用后分别从同一滤波膜的不同位置透过，有效实现了不同波长 的多路光波的分离。 由于不依赖于波导技术， 本发明实施例提供的分光 方法降低了光分插复用设备对温度变化的敏感性，同时由于利用一个分 光装置即可实现多波长光波的分离， 不需要进行分光装置的串接， 因此 节省了材料、 减小了光分插复用设备的体积， 且简化了封装， 有效提高 了光分插复用设备的性能同时降低了光分插复用设备的成本。
其中， 步骤 S 13 中， 通过光转向部使所述被所述滤波膜反射至所 述光转向部的光波以第二规定角度入射至所述滤波膜包括：
通过反射镜或反射膜对被滤波膜反射至光转向部的光波进行反 射，使被所述滤波膜反射至所述光转向部的光波以第二规定角度入射至 滤波膜。 相应的， 本发明实施例还提供一种光复用方法， 如图 7 所示， 包 括：
521 , 分别接收第一波长光波和第二波长光波， 使所述第一波长光 波入射至所述滤波膜，使所述第二波长光波以第三规定角度入射至所述 滤波膜；
522 , 通过所述滤波膜使所述第一波长光波从所述滤波膜透射， 使 所述第二波长光波从所述滤波膜透射并入射至光转向部；
523 , 通过所述光转向部使所述入射至所述光转向部的第二波长光 波以第四规定角度入射至所述滤波膜；
524 , 通过所述滤波膜使所述以第四规定角度入射的第二波长光波 被反射后， 与从所述滤波膜透射的第一波长光波相遇， 以实现所述第一 波长光波与所述第二波长光波的复用。
其中， 所述第三规定角度与所述第四规定角度不同， 所述第三规 定角度为所述滤波膜允许第二波长光波透射时，所述第二波长光波入射 至所述滤波膜的入射角。正因为第四规定角度与第三规定角度不同， 当 第二波长光波以第四规定角度入射至所述滤波膜时，不能被所述滤波膜 透射， 只能被反射。
本发明实施例提供的光复用方法， 利用了光波以不同角度入射时， 滤波膜允许透射的光波的波长不同的原理，使不同波长的光波以不同的 角度入射并透过滤波膜而入射至光转向部，所述光转向部使透射过滤波 膜的光波的传播方向发生改变进而以与被滤波膜透射时的入射角不同 的入射角再次入射至所述滤波膜。由于此时的入射角已经与被透射时不 同， 光波不再被所述滤波膜透射， 而是被反射， 这样， 以不同角度入射 至所述滤波膜的光波， 经过在光转向部和滤波膜之间传播后， 最终能被 汇成一束， 以同样的角度从光复用装置射出， 不仅有效实现了不同波长 的多路光波的复用，还不依赖于波导技术， 降低了设备对温度变化的敏 感性， 同时由于利用一个光复用装置即可实现多波长光波的复用， 不需 要进行光复用装置的串接， 因此节省了材料、减小了光分插复用设备的 体积，且简化了封装，有效提高了光分插复用设备的性能同时降低了光 分插复用设备的成本。
其中， 通过光转向部使入射至所述光转向部的第二波长光波以第 四规定角度入射至所述滤波膜具体可以为：通过反射镜或反射膜对所述 入射至所述光转向部的第二波长光波进行反射，使所述第二波长光波以 第四规定角度入射至所述滤波膜。
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 发明的保护范围应所述以权利要求的保护范围为准。

Claims

权利 要求 书
1、 一种分光装置， 包括基片、 所述基片的上表面设置有增透膜， 所 述基片的下表面设置有滤波膜， 其特征在于，
还包括与所述滤波膜相对设置的光转向部；
光信号以第一规定角度入射至所述滤波膜， 所述光信号中的第一波 长光波被所述滤波膜透射， 以使所述第一波长光波从所述光信号中分离， 而除所述第一波长光波以外的光波被所述滤波膜反射至所述光转向部， 所述光转向部使所述反射至所述光转向部的光波以第二规定角度入射至 所述滤波膜， 所述光信号中的第二波长光波被所述滤波膜透射， 以使所 述第二波长光波从所述光信号中分离；
其中， 所述第二规定角度与所述第一规定角度不同， 所述第一规定 角度为所述滤波膜允许第一波长光波透射时， 所述光信号入射至所述滤 波膜的入射角， 所述第二规定角度为所述滤波膜允许第二波长光波透射 时， 所述光信号入射至所述滤波膜的入射角。
2、 根据权利要求 1所述的分光装置， 其特征在于， 所述光转向部设 置在所述基片的上表面侧， 间隔所述增透膜和所述基片与所述滤波膜相 对设置； 或者
所述光转向部设置在所述基片的下表面侧， 与所述滤波膜相对设置。
3、 根据权利要求 2所述的分光装置， 其特征在于， 所述光转向部设 置于所述增透膜上。
4、 根据权利要求 1所述的分光装置， 其特征在于， 所述光转向部为 至少两个， 所述至少两个光转向部间隔分布。
5、 根据权利要求 1所述的分光装置， 其特征在于， 所述光转向部的 数量为 1、 3或 7。
6、 根据权利要求 1至 5任一项所述的分光装置， 其特征在于， 所述 光转向部包括反射镜或反射膜。
7、 根据权利要求 6所述的分光装置， 其特征在于， 所述反射镜或反 射膜以规定角度与所述滤波膜相对设置。
8、 一种光复用装置， 包括基片、 所述基片的上表面设置有增透膜， 所述基片的下表面设置有滤波膜， 其特征在于，
还包括与所述滤波膜相对设置的光转向部； 第一波长光波入射至所述滤波膜并从所述滤波膜透射， 第二波长光 波以第三规定角度入射至所述滤波膜并从所述滤波膜透射， 从所述滤波 膜透射的所述第二波长光波入射至所述光转向部， 所述光转向部使所述 第二波长光波以第四规定角度入射至所述滤波膜， 所述以第四规定角度 入射至所述滤波膜的第二波长光波被所述滤波膜反射， 与从所述滤波膜 透射的所述第一波长光波相遇， 以实现所述第一波长光波与所述第二波 长光波的复用；
其中， 所述第三规定角度与所述第四规定角度不同， 所述第三规定 角度为所述滤波膜允许所述第二波长光波透射时， 所述第二波长光波入 射至所述滤波膜的入射角。
9、 根据权利要求 8 所述的光复用装置， 其特征在于， 所述光转向 部设置在所述基片的上表面侧， 间隔所述增透膜和所述基片与所述滤波 膜相对设置； 或者
所述光转向部设置在所述基片的下表面侧， 与所述滤波膜相对设置。
10、 根据权利要求 9 所述的光复用装置， 其特征在于， 所述光转向 部设置于所述增透膜上。
1 1、 根据权利要求 8 所述的光复用装置， 其特征在于， 所述光转向 部为至少两个， 所述至少两个光转向部间隔分布。
12、 根据权利要求 8 所述的光复用装置， 其特征在于， 所述光转向 部的数量为 1、 3或 7。
13、 根据权利要求 8至 12任一项所述的光复用装置， 其特征在于， 所述光转向部包括反射镜或反射膜。
14、 根据权利要求 13所述的光复用装置， 其特征在于， 所述反射镜 或反射膜以规定角度与所述滤波膜相对设置。
15、 一种光分插复用设备， 其特征在于， 所述光分插复用设备中设 置有权利要求 1至 7中任一项所述的分光装置。
16、 一种光分插复用设备， 其特征在于， 所述光分插复用设备中设 置有权利要求 8至 14中任一项所述的光复用装置。
17、 一种分光方法， 其特征在于， 包括： 接收光信号， 使所述光信号以第一规定角度入射至滤波膜；
通过所述滤波膜使所述光信号中的第一波长光波被所述滤波膜透 射， 以使所述第一波长光波从所述光信号中分离， 使所述光信号中除所 述第一波长光波以外的光波被所述滤波膜反射至光转向部；
通过所述光转向部使所述被所述滤波膜反射至所述光转向部的光波 以第二规定角度入射至所述滤波膜；
通过所述滤波膜使所述光信号中的第二波长光波被所述滤波膜透 射， 以使所述第二波长光波从所述光信号中分离；
其中， 所述第二规定角度与所述第一规定角度不同， 所述第一规定 角度为所述滤波膜允许第一波长光波透射时， 所述光信号入射至所述滤 波膜的入射角， 所述第二规定角度为所述滤波膜允许第二波长光波透射 时， 所述光信号入射至所述滤波膜的入射角。
18、 根据权利要求 17所述的分光方法， 其特征在于， 所述通过所述 光转向部使所述被所述滤波膜反射至所述光转向部的光波以第二规定角 度入射至所述滤波膜包括：
通过反射镜或反射膜对所述被所述滤波膜反射至所述光转向部的光 波进行反射， 使所述被所述滤波膜反射至所述光转向部的光波以第二规 定角度入射至所述滤波膜。
19、 一种光复用方法， 其特征在于， 包括：
分别接收第一波长光波和第二波长光波， 使所述第一波长光波入射 至所述滤波膜， 使所述第二波长光波以第三规定角度入射至所述滤波膜； 通过所述滤波膜使所述第一波长光波从所述滤波膜透射， 使所述第 二波长光波从所述滤波膜透射并入射至光转向部；
通过所述光转向部使所述入射至所述光转向部的第二波长光波以第 四规定角度入射至所述滤波膜；
通过所述滤波膜使所述以第四规定角度入射的第二波长光波被反射 后， 与从所述滤波膜透射的第一波长光波相遇， 以实现所述第一波长光 波与所述第二波长光波的复用；
其中， 所述第三规定角度与所述第四规定角度不同， 所述第三规定 角度为所述滤波膜允许第二波长光波透射时， 所述第二波长光波入射至 所述滤波膜的入射角。
20、 根据权利要求 19所述的光复用方法， 其特征在于， 所述通过所 述光转向部使所述入射至所述光转向部的第二波长光波以第四规定角度 入射至所述滤波膜包括：
通过反射镜或反射膜对所述入射至所述光转向部的第二波长光波进 行反射， 使所述第二波长光波以第四规定角度入射至所述滤波膜。
PCT/CN2011/077111 2011-07-13 2011-07-13 分光装置、光复用装置及方法、光分插复用设备 WO2012106886A1 (zh)

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