WO2023065468A1 - Système de transmission de signal optique - Google Patents

Système de transmission de signal optique Download PDF

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Publication number
WO2023065468A1
WO2023065468A1 PCT/CN2021/134323 CN2021134323W WO2023065468A1 WO 2023065468 A1 WO2023065468 A1 WO 2023065468A1 CN 2021134323 W CN2021134323 W CN 2021134323W WO 2023065468 A1 WO2023065468 A1 WO 2023065468A1
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WO
WIPO (PCT)
Prior art keywords
optical signal
optical
combining module
transmission system
isolator
Prior art date
Application number
PCT/CN2021/134323
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English (en)
Chinese (zh)
Inventor
杨健
郁勤荣
雷奖清
Original Assignee
昂纳信息技术（深圳）有限公司
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Publication of WO2023065468A1 publication Critical patent/WO2023065468A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4213—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being polarisation selective optical elements
    • 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
    • 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
    • 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
    • G02B6/43—Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections

Definitions

  • the present application relates to the field of laser technology, in particular to an optical signal transmission system.
  • optical fiber communication technology With the development of optical fiber communication technology, the requirements for the transmission quantity and capacity of optical communication are getting higher and higher, which makes the current optical communication transmission technology face a huge challenge, and the traditional optical signal transmission system has certain limitations. The scope of application is limited to a certain extent.
  • This application provides an optical signal transmission system, which can output two beams of optical signals through the first beam combining module and the second beam combining module, and then convert them into mutually perpendicular P polarization states through the isolation component
  • the optical signal of the optical signal and the optical signal of the S polarization state are finally synthesized into a beam of optical signals through a light-combining prism and then output, thereby increasing the number of transmissions of the optical signal transmission system and effectively improving the transmission capacity of information.
  • optical signal transmission system comprising:
  • the transmitting component is used for transmitting multiple parallel optical signals.
  • the collimation component is used to collimate the optical signal, so that the multiple optical signals sent by the transmitting module can be transformed into multiple parallel beams.
  • the multiplexer component includes a first beam combiner module and a second beam combiner module, and multiple parallel light beams pass through the first beam combiner module and the second beam combiner module to output two beams of optical signals.
  • An isolation component including a first isolator and a second isolator, wherein one beam of the optical signal passes through the first isolator to form a P-polarized optical signal, and the other beam of the P-polarized optical signal passes through the
  • the second isolator back-polarizes and converts the optical signal in the S polarization state, and the optical signal in the P polarization state and the optical signal in the S polarization state are perpendicular to each other.
  • a light combining prism and a converging lens the light combining prism is arranged at the front end of the converging lens, and the light combining prism synthesizes the optical signal of the P polarization state and the optical signal of the S polarization state into a beam of optical signals output through the converging lens.
  • At least one optical signal channel is provided on the first beam combining module and the second beam combining module, and a part of the number of parallel beams passes through the first
  • the optical signal channel on the beam combining module combines one of the optical signals, and the other part of the multiple parallel light beams is converged into another optical signal through the optical signal channel of the second beam combining module.
  • the first beam combining module includes a first optical plane and a second optical plane, and reflective films are provided on opposite sides of the first optical plane and the second optical plane , the parallel light beam is output from the second optical plane after being reflected by the first optical plane and the second optical plane.
  • the first beam combining module is obliquely arranged at the front end of the isolation component at a first preset angle.
  • an end surface of the second beam combining module is attached to an end surface of the first beam combining module.
  • the structure of the second beam combining module is the same as that of the first beam combining module.
  • the first isolator includes a first isolator body and a 0° half-wave plate, and the 0° half-wave plate is attached to the side of the first isolator body.
  • the second isolator includes a second isolator body and a 45° half-wave plate, and the 45° half-wave plate is bonded to the One side of the second isolator body.
  • the emitting component includes at least two lasers
  • the collimating component includes a number of collimating lenses matching the number of the lasers
  • each of the collimating lenses is correspondingly set between each of the lasers and the multiplexer components.
  • the optical signal transmission system includes an optical bench, and the emitting component, the collimating component, the multiplexing component, the isolating component, the light combining prism and the converging lens are sequentially along the direction of the optical path Set on the optical bench.
  • the technical solutions provided by the embodiments of the present application may include the following beneficial effects:
  • the present application designs an optical signal transmission system, including a transmitting component, a collimating component, a multiplexing component, an isolating component, a light combining prism, and a converging lens, so that the first The beam combining module and the second beam combining module can output multiple parallel optical signals emitted by the transmitting component into two beams of optical signals, and then convert them into mutually perpendicular P-polarized optical signals and S-polarized light through the isolation component Signal, in order to reduce the energy loss in the transmission process, and finally synthesize a beam of optical signals through the light-combining prism and output it, so as to increase the transmission quantity of the optical signal transmission system and effectively improve the transmission capacity of information.
  • the length of the optical path is longer after using a multiplexer component, the processing accuracy of the multiplexer component is higher, the requirements for the higher precision of the patch of the emission component and the collimation component are solved, and the coupling Difficulty and other problems, thereby reducing the difficulty of production and improving the manufacturability of products.
  • FIG. 1 is a schematic structural diagram of an optical signal transmission system provided by an embodiment of the present application.
  • Fig. 2 is a schematic diagram of an optical path of an optical signal transmission system provided by another embodiment of the present application.
  • FIG. 3 is a schematic diagram of an optical path of the optical signal transmission system in FIG. 1 .
  • FIG. 4 is a schematic diagram of the optical path of the multiplexer component in FIG. 1 .
  • FIG. 5 is a schematic diagram of the optical path of the isolation component in FIG. 1 .
  • FIG. 6 is a schematic view of the light path of the light combining prism in FIG. 1 .
  • FIG. 7 is a schematic diagram of the optical path of the converging lens in FIG. 1 .
  • Fig. 8 is a schematic diagram of the optical path of the emitting assembly in Fig. 1 .
  • a collimating component 300.
  • a collimating lens 301.
  • Wave combining component 401. First beam combining module; 4011. First optical plane; 4012. Second optical plane; 402. Second beam combining module.
  • 500 an isolation component
  • 501 a first isolator
  • 502 a second isolator.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • a feature defined as “first” or “second” may explicitly or implicitly include one or more of said features.
  • “plurality” means two or more, unless otherwise specifically defined.
  • an optical signal transmission system includes a transmitting component 200, a collimating component 300, a multiplexing component 400, an isolating component 500, a light combining prism 600 and a converging lens 700, wherein,
  • the transmitting component 200 is used to transmit multiple parallel optical signals 1000
  • the collimating component 300 is used to perform collimation processing on the optical signal 100
  • the multiplexing component 400 is used to output the multiple parallel beams processed by the collimating component 300 into two A beam of optical signals
  • the isolation component 500 is used to convert the two beams of optical signals into the optical signal of the P polarization state and the optical signal of the S polarization state that are perpendicular to each other
  • the light combining prism 600 combines the optical signal of the P polarization state with the light of the S polarization state
  • the signals are synthesized into a beam of optical signals and then output through the converging lens 700 to reduce the energy loss of the optical signal 1000 during transmission, thereby increasing the transmission
  • the multiplexing component 400 is used to output two beams of P-polarized optical signals from the multiple parallel beams processed by the collimating component 300, and the isolation component 500 is used to convert the two beams of P-polarized optical signals into mutually The optical signal of the vertical P polarization state and the optical signal of the S polarization state.
  • the multiplexing component 400 includes a first beam combining module 401 and a second beam combining module 402, and the collimating component 300 is used to collimate the optical signal 1000, so that the multiple optical signals sent by the transmitting module 200 1000 can be transformed into multiple parallel light beams after being passed through the collimation component 300 , and the multiple parallel light beams are converged into two beams of P-polarized optical signals through the first beam combining module 401 and the second beam combining module 402 .
  • multiple parallel optical signals 1000 can be converged into two beams of P-polarized optical signals, which can not only increase the transmission quantity of the optical signal 1000, but also
  • the optical path of the optical signal 1000 can be shortened by half to achieve a good effect of shortening the optical path, so as to reduce the accuracy requirement of the optical signal transmission system for the transmitting component 200 and reduce the manufacturing cost of the optical signal transmission system.
  • the transmitting assembly 200 includes at least two lasers 201
  • the collimating assembly 300 includes collimating lenses 301 matching the number of lasers 201
  • each collimating lens 301 is correspondingly arranged between each laser 201 and the multiplexer assembly 400
  • the collimation component 300 is enabled to perform collimation processing on the optical signal 1000 emitted by each laser 201 .
  • the emitting assembly 200 includes eight lasers 201
  • the collimating assembly 300 includes a plurality of collimating lenses 301
  • the number of collimating lenses 301 matches the number of lasers 201
  • each collimating lens 301 is correspondingly arranged on each
  • the collimator component 300 can collimate the optical signal 1000 emitted by each laser 201 .
  • the eight lasers 201 respectively send out a first optical signal, a second optical signal, a third optical signal, a fourth optical signal, a fifth optical signal, a sixth optical signal, a seventh optical signal and an eighth optical signal, wherein the first The wavelengths of the optical signal, the second optical signal, the third optical signal, the fourth optical signal, the fifth optical signal, the sixth optical signal, the seventh optical signal and the eighth optical signal can be set to different wavelengths as required.
  • the first optical signal, the second optical signal, the third optical signal, and the fourth optical signal are directly incident on the first beam combining module 401 after being shaped by the collimating lens 301, and then the first beam combining module 401 After internal reflection, they are combined into a bundle of optical signals with P polarization state, that is, the first combined optical signal; and the fifth optical signal, sixth optical signal, seventh optical signal and eighth optical signal are directly incident on the The second beam combining module 402 is then reflected in the second beam combining module 402 and then combined into another beam of P-polarized optical signals, that is, the second combined optical signal.
  • the isolation component 500 includes a first isolator 501 and a second isolator 502, so that one of the optical signals is transmitted to the first isolator 501 to form a P-polarized optical signal, and the other optical signal can pass through the second isolator After 502, it is converted into an optical signal of S polarization state.
  • the optical signal in the P polarization state and the optical signal in the S polarization state are perpendicular to each other, so as to reduce the energy loss of the optical signal 1000 during transmission, and there is almost no energy loss in the whole process, and it is compatible with high-speed and low-speed high-capacity optical signals. Signal transmission system.
  • one beam of P-polarized optical signal is transmitted to the first isolator 501 to maintain the polarization state of the optical signal, and the other beam of P-polarized optical signal can be converted to S-polarized by the second isolator 502 state of the light signal.
  • the first isolator 501 is arranged at the rear end of the first beam combining module 401
  • the second isolator 502 is arranged at the rear end of the second beam combining module 402
  • the first combined optical signal is maintained after passing through the first isolator 501.
  • the polarization state of the optical signal remains unchanged, the second synthesized optical signal passes through the second isolator 502 and is converted into an optical signal of the S polarization state, the optical signal of the P polarization state and the optical signal of the S polarization state enter the light combining prism 600, and A beam of optical signals is synthesized in the light-combining prism 600, and the optical signal includes almost all of the first optical signal, the second optical signal, the third optical signal, the fourth optical signal, the fifth optical signal, the sixth optical signal, the The seven optical signals and the eighth optical signal not only have extremely small loss, but also can improve the transmission capacity of the optical signal transmission system.
  • the light combined prism 600 is used to convert the first combined optical signal and the second combined optical signal through the combined wave component 400 of at least one optical signal channel into a combined optical signal, which not only keeps the size of the device small
  • the light-combining prism 600 uses a diaphragm that is independent of polarization and wavelength, thereby greatly reducing the cost.
  • the optical signal intensity of each beam before combining has the same ratio, which can better meet the optical power requirements of multi-channel products, and can not only realize the multiplexing of multiple beams of different wavelength optical signals, but also realize Multiplexing of multiple optical signals of the same wavelength.
  • the wavelength of the multiplexing component 400 may include one of CWDM, LWDM, or DWDM band groups, or the multiplexing component 400 may also mix and match the three band groups of CWDM, LWDM, and DWDM.
  • the number of lasers in the present application is not limited to eight, and the first beam combining module 401 and the second beam combining module 402 are not limited to four optical signal channels, which can be designed according to specific conditions.
  • the number of lasers and collimating lenses 301 are four
  • the optical signal channels on the first beam combining module 401 and the second beam combining module 402 are two
  • the four lasers send out the first
  • the optical signal, the second optical signal, the third optical signal, and the fourth optical signal, the first optical signal and the second optical signal are reflected by the first beam combining module 401 and then combined into a beam of optical signals in a P polarization state
  • the third optical signal The optical signal and the fourth optical signal are reflected by the second beam combining module 402 and then combined into another beam of P-polarized optical signals.
  • One of the optical signals in the P polarization state passes through the first isolator 501 to maintain the optical signal in the P polarization state, and the other optical signal in the P polarization state passes through the second isolator 502 and is converted into an optical signal in the S polarization state.
  • the optical signal of the S polarization state and the optical signal of the S polarization state are perpendicular to each other, and then a beam of optical signals is synthesized in the light combining prism 600 for output.
  • the first beam combining module 401 and the second beam combining module 402 are each provided with at least one optical signal channel, which is used to combine the optical signal emitted by the emitting component 200 into two laser signals with the same intensity ratio .
  • optical signal channels are provided on the first beam combining module 401 and the second beam combining module 402, and the transmitting component 200 sends out eight optical signals 1000, among which four optical signals 1000 pass through the first beam combining module 401.
  • the four optical signal channels synthesize one optical signal of P polarization state, and the other four optical signals 1000 synthesize another optical signal of P polarization state through the four optical signal channels of the second beam combining module 402 .
  • the optical signal 1000 emitted by the transmitting component 200 may be any other optical signal 1000 containing multiple wavelengths, that is, the optical signal 1000 emitted by the eight lasers 201 is any optical wave containing multiple wavelengths.
  • the first beam combining module 401 includes a first optical plane 4011 and a second optical plane 4012, wherein the first optical plane 4011 and the second optical plane 4012 are correspondingly arranged on the two inner sides opposite to each other.
  • There is a reflective film so that the parallel light beam can be output from a position without a reflective film on the second optical plane 4011 after being reflected by the first optical plane 4011 and the second optical plane 4012 .
  • the first beam combining module 401 is obliquely arranged at the front end of the isolation assembly 500 at a first preset angle, so that the first isolator 501 can prevent reflected light and light from an external optical path from entering the laser , that is, at the position where the back light that can be blocked is scattered or blocked, to prevent light from being coupled into the first beam combining module 401 , and to improve the full-angle isolation.
  • the end surface of the second beam combining module 402 is attached to the end surface of the first beam combining module 401 and the two are inclined at a third preset angle.
  • the structure of the second beam combining module 402 is the same as that of the first beam combining module 401, and also includes a first optical plane 4011 and a second optical plane 4012, wherein the first optical plane 4011 and The two opposite inner surfaces of the second optical plane 4012 are provided with reflective films correspondingly, so that the parallel light beams can be output from the second optical plane 4012 after being reflected by the first optical plane 4011 and the second optical plane 4012 .
  • the first isolator 501 includes a first isolator body 5011 and a 0° half-wave plate 5012, wherein the 0° half-wave plate 5012 is attached to the first One side of the isolator body 5011 is used to maintain the optical signal in the P polarization state.
  • the second isolator 502 includes a second isolator body and a 45° half-wave plate, and the 45° half-wave plate is attached to one side of the second isolator body. side.
  • the second half-wave plate is bonded to one side of the second isolator body, and is used to convert the optical signal of the P polarization state into the optical signal of the S polarization state.
  • the optical signal transmission system includes an optical bench 100, wherein the emitting assembly 200, the collimating assembly 300, the multiplexing assembly 400, the isolating assembly 500, the light combining prism 600 and the converging lens 700 are along the direction of the optical path are arranged on the optical bench 100 in sequence.
  • the multiplexer component 400 is first attached to the optical bench 100 (as shown in FIG. 4 ), and the multiplexer component 400 is used to combine optical signals containing any 1000 synthesizes two beams of laser signals to complete the wave combining function. Then the isolation component 500 is placed on a corresponding position (as shown in FIG. 5 ), so that the isolation component 500 can convert the two optical signals into a P-polarized optical signal and an S-polarized optical signal.
  • the light combining prism 600 is arranged at the rear end of the isolation component 500 (as shown in Figure 6), so that the optical signal of the P polarization state and the optical signal of the S polarization state can pass through the light combining prism 600 to synthesize a beam of synthesized light that simultaneously includes the optical signal of the P polarization state and the optical signal of the S polarization state.
  • the eight lasers 201 are placed in corresponding positions according to the design requirements (as shown in FIG. 8 ), so that the optical signals 1000 emitted by the eight lasers 201 can be incident on the corresponding optical signal channels on the multiplexer component 400 , and then the optical signals 1000 A laser signal or two beams of P-polarized optical signals are synthesized in the signal channel.
  • each collimating lens 301 is correspondingly installed between each laser 201 and each optical signal channel, so that each collimating lens 301 can be used to receive the optical signal 1000 sent by each laser 201 to obtain parallel beams, eight Each laser 201 can send out eight optical signals 1000 of different wavelengths, that is, the collimating lens 301 can collimate the eight optical signals 1000 of different wavelengths into multiple parallel beams of different wavelengths, obtain multiple parallel beams of different wavelengths, and emit multiple Parallel beams of different wavelengths.
  • the second beam combining module 402 or the first beam combining module 401 can not only combine four optical signals with different wavelengths, but also combine four optical signals with the same wavelength. Since the diaphragms on the second beam combining module 402 and the first beam combining module 401 are independent of the polarization direction and wavelength of the optical signal, the cost of the diaphragms is much lower than polarization-dependent or wavelength-dependent diaphragms.
  • the optical signal transmission system shown in this application realizes the combination of eight optical signals of the multi-channel optical signal transmission system into one beam at a lower cost, and the combined optical signal has the same strength as the optical signal before combining Ratio, and can not only realize the multiplexing of eight optical signals of different wavelengths, but also realize the multiplexing of eight optical signals of the same wavelength.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. connected, or integrally connected. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two elements or the interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
  • a first feature being "on” or “under” a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them.
  • “above”, “above” and “above” the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.
  • “Below”, “beneath” and “under” the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

L'invention concerne un système de transmission de signal optique, comprenant un ensemble de transmission, un ensemble de collimation, un ensemble de combinaison d'ondes, un ensemble d'isolation, un prisme de combinaison de lumière et une lentille convergente. L'ensemble de transmission est utilisé pour transmettre de multiples signaux optiques parallèles. L'ensemble de collimation est utilisé pour collimater les signaux optiques, de telle sorte que les multiples signaux optiques peuvent être convertis en de multiples faisceaux lumineux parallèles. L'ensemble de combinaison d'ondes comprend un premier module de combinaison de faisceaux et un second module de combinaison de faisceaux. Les multiples faisceaux lumineux parallèles passent à travers le premier module de combinaison de faisceau et le second module de combinaison de faisceau, de façon à délivrer en sortie deux faisceaux de signaux optiques. L'ensemble d'isolation comprend un premier isolateur et un second isolateur. Un faisceau de signaux optiques forme un signal optique d'état de polarisation P au moyen du premier isolateur, et l'autre faisceau de signaux optiques est converti en un signal optique à l'état de polarisation S après avoir traversé le second isolateur. Le signal optique d'état de polarisation P et le signal optique d'état de polarisation S sont perpendiculaires l'un à l'autre. Le signal optique d'état de polarisation P et le signal optique d'état de polarisation S sont synthétisés par le prisme de combinaison de lumière en un faisceau de signaux optiques puis émis par la lentille convergente.
PCT/CN2021/134323 2021-10-19 2021-11-30 Système de transmission de signal optique WO2023065468A1 (fr)

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CN117908197A (zh) * 2022-10-11 2024-04-19 华为技术有限公司 一种tosa、光模块、光网络设备和光发射方法

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