CN104459904B - A kind of single fiber bi-directional BOSA structure - Google Patents

A kind of single fiber bi-directional BOSA structure Download PDF

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Publication number
CN104459904B
CN104459904B CN201310424754.5A CN201310424754A CN104459904B CN 104459904 B CN104459904 B CN 104459904B CN 201310424754 A CN201310424754 A CN 201310424754A CN 104459904 B CN104459904 B CN 104459904B
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China
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λ
described
light
splitting prism
polarization splitting
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CN201310424754.5A
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Chinese (zh)
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CN104459904A (en
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徐云兵
刘洪彬
凌吉武
李伟启
王向飞
何亮
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福州高意通讯有限公司
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • G02B6/4201Packages, e.g. shape, construction, internal or external details
    • G02B6/4204Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4207Packages, 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
    • G02B6/4208Packages, 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
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/32Optical coupling means having lens focusing means positioned between opposed fibre ends
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/34Optical coupling means utilising prism or grating
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • G02B6/4201Packages, e.g. shape, construction, internal or external details
    • G02B6/4204Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • G02B6/4201Packages, e.g. shape, construction, internal or external details
    • G02B6/4204Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4213Packages, 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40Transceivers

Abstract

The invention discloses a kind of single fiber bi-directional BOSA structure, comprise that encapsulating housing, TOSA, ROSA and light transmitting-receiving share optical texture, this TOSA comprises light transmitting group and WDM structure, and ROSA comprises light-receiving group and Wave Decomposition multiplexing structure; Housing one end is provided with an optical interface, and the optical signal that optical interface receives share on the Wave Decomposition multiplexing structure that optical texture incides ROSA through the transmitting-receiving of described light; The flashlight of TOSA transmitting, after its WDM structure closes light, share optical texture through described light transmitting-receiving and is transferred to described optical interface, by the flashlight of this optical interface output TOSA transmitting; TOSA, ROSA and light transmitting-receiving are share optical texture and are packaged in housing. This structure is for 4 passage high speed receive-transmit systems, directly on an optical fiber, carry out uplink and downlink transmission, without external device or equipment, greatly simplify system architecture, reduced operation cost, and easy to assembly, effectively reduce Insertion Loss, improve coupling efficiency, there is good temperature performance, be conducive to the long Distance Transmission of optical signal.

Description

A kind of single fiber bi-directional BOSA structure

Technical field

The present invention relates to technical field of optical fiber communication, relate in particular to a kind of light single fiber bi-directional BOSA structure for 4 passage high speed receive-transmit systems.

Background technology

Growing along with communication field, traditional transmission technology has been difficult to meet the requirement of transmission capacity and speed, in typical application as fields such as data center, network connection, search engine, high-performance calculations, for preventing the deficiency of broadband resource, common carrier and service suppliers dispose planning express network agreement of new generation, and this just needs corresponding high speed transceiver module to meet the transfer of data requirement of high density two-forty. In information transmission system at a high speed, need to substitute traditional optical module with highdensity optical module, adopt multichannel light transmit-receive technology, more transponder and receiver can be concentrated in less space and go, especially in the optical fiber solution of 40Gbps or 100Gbps, adopt the transmission technology of 4 passages, carry out transfer of data with every path 10 Gbps or higher speed, its capacity can reach 4 times even higher of traditional single channel transmission. And in such high speed transceiver module, its core component is BOSA structure in module.

Traditional BOSA structure is to adopt two frame modes that housing is discrete, one of them is TOSA transmitter module, another is ROSA receiver module, this will make the bulky of BOSA module, and causes the waste of resource, even TOSA and ROSA are contained in same module, also need two optical patchcord interfaces to transmit and receive, share an optical fiber if need transmit and receive, need to access additional circulator, this has increased again the difficulty of operating cost and light path undoubtedly.

Summary of the invention

The object of the invention is to propose a kind of single fiber bi-directional BOSA structure for 4 passage high speed receive-transmit systems, directly on an optical fiber, carry out uplink and downlink transmission, without external device or equipment, greatly simplified system architecture, reduced operation cost.

For achieving the above object, the technical scheme that the present invention proposes is: a kind of single fiber bi-directional BOSA structure, comprise encapsulating housing, TOSA and ROSA, and described TOSA comprises light transmitting group and WDM structure; Described ROSA comprises light-receiving group and Wave Decomposition multiplexing structure; Also comprise that a light transmitting-receiving share optical texture; Described housing one end is provided with an optical interface, and the optical signal that optical interface receives share on the Wave Decomposition multiplexing structure that optical texture incides ROSA through the transmitting-receiving of described light; The flashlight of described TOSA transmitting, after its WDM structure closes light, share optical texture through described light transmitting-receiving and is transferred to described optical interface, by the flashlight of this optical interface output TOSA transmitting; Described TOSA, ROSA and light transmitting-receiving are share optical texture and are packaged in housing.

Further, the transmitting-receiving of described light is share optical texture and is comprised the first polarization splitting prism, Faraday rotator, half wave plate group and the second polarization splitting prism that arrange according to light path, and is located at the photon structure that closes between the Wave Decomposition multiplexing structure of ROSA and the first polarization splitting prism, described the first polarization splitting prism and the second polarization splitting prism include two oblique 45 ° of polarization spectro faces that be arranged in parallel, and two polarization splitting prisms vertical setting mutually, two polarization spectro faces of described the first polarization splitting prism lay respectively on the WDM structure output light path of TOSA and on the input light path of ROSA Wave Decomposition multiplexing structure, described half wave plate group comprises half-wave plate and lower half-wave plate, lays respectively in the light path that two polarization beam splitter faces of the second polarization splitting prism are corresponding, the combination of described half wave plate group and Faraday rotator, together by the light polarization direction half-twist by half wave plate group and Faraday rotator or 0 °, flashlight by described optical interface incident is divided into S light and P light two-route wire polarised light through the second polarization splitting prism, two-route wire polarised light is respectively through upper half-wave plate and lower half-wave plate, again by after Faraday rotator, two linearly polarized lights be all rotated become P light by the first polarization splitting prism two secondary reflections after incident close photon structure, ECDC photon structure is combined in the Wave Decomposition multiplexing structure that light beam incides ROSA, and the linearly polarized light of the WDM structure of TOSA output is directly transmitted through inciding Faraday rotator after the first polarization splitting prism, after half wave plate group and the second polarization splitting prism, exported by described optical interface, or two linearly polarized light all become S light after the Faraday rotator and incide after directly transmitted through the first polarization splitting prism and close photon structure, ECDC photon structure is combined in the Wave Decomposition multiplexing structure that light beam incides ROSA, the linearly polarized light of the WDM structure output of described TOSA incides Faraday rotator after two secondary reflections of the first polarization splitting prism, after half wave plate group and the second polarization splitting prism, is exported by described optical interface.

Further, described in, close photon structure and comprise the 3rd polarization splitting prism and half of wave plate; Described the 3rd polarization splitting prism comprises two oblique 45 ° of polarization spectro faces that be arranged in parallel, in light path corresponding to a described half-wave plate polarization beam splitter face located therein, between the 3rd polarization splitting prism and the first polarization splitting prism, the angle of its optical axis direction and horizontal polarization light is 45 °.

Further, between described the 3rd polarization splitting prism and the first polarization splitting prism, be also provided with a sheet glass, arranged side by side with described half-wave plate, be located in the light path that the 3rd another polarization beam splitter face of polarization splitting prism is corresponding.

Further, in described housing, be divided into two independently accommodation spaces by a central dividing plate, be respectively used to hold TOSA and ROSA; Described dividing plate is provided with a through hole, and described the first polarization splitting prism is arranged on this through hole, and two polarization spectro face lays respectively in two accommodation spaces; Described Faraday rotator, half wave plate group and the second polarization splitting prism and TOSA are located in one accommodation space, or are located in one accommodation space with ROSA.

Further, the light transmitting group of described TOSA comprises laser array and the collimation lens set of four different wave lengths, described WDM structure comprises that two close photon unit, described in close photon unit and comprise the first completely reflecting mirror, polarization splitting prism, half-wave plate, the second completely reflecting mirror and isolator, the angle of described half-wave plate optical axis direction and horizontal polarization light is 45 °, laser array is sent the linearly polarized light of λ 1, λ 2, λ 3 and 4 four different wave lengths of λ, and after collimation lens set collimation, λ 1 and λ 2 incide wherein and one close photon unit, and λ 3 and λ 4 incide another and close photon unit, the described half-wave plate that closes photon unit is located at before polarization splitting prism, be positioned in the input path of λ 1 or λ 3, by the polarization direction half-twist of the λ of incident 1 or λ 3, described the first completely reflecting mirror is positioned in the input path of λ 2 or λ 4, λ 2 or λ 4 are reflexed on described polarization splitting prism, and be orthogonal on the light splitting surface of this polarization splitting prism with λ 1 or λ 3, λ 1 and λ 2 close bundle respectively and export after same polarization splitting prism reflection of closing photon unit and transmission, and reflex to the transmitting-receiving of described light by the second completely reflecting mirror and share on the first polarization splitting prism of optical texture, λ 3 and λ 4 also close bundle output respectively after the polarization splitting prism reflection of closing photon unit at its place and transmission, and reflex to described light by the second completely reflecting mirror and receive and dispatch and share on the first polarization splitting prism of optical texture, the described isolator that closes photon unit is the relevant isolator of polarization, the polarization direction of the linearly polarized light through its isolation is rotated to 45 ° again, this isolator is located at polarization splitting prism and second and is all-trans between light-radiating lens, or be located between the second completely reflecting mirror and the first polarization splitting prism, its optical axis direction and level and vertically polarised light are all 45 ° of angles, and two to close the isolator optical axis direction of photon unit consistent.

Further, the light transmitting group of described TOSA comprises laser array and the collimation lens set of four different wave lengths; Described WDM structure comprises that two close photon unit, described in close photon unit and comprise the first completely reflecting mirror, filtering diaphragm, the second completely reflecting mirror and isolator; Laser array is sent the linearly polarized light of λ 1, λ 2, λ 3 and 4 four different wave lengths of λ, and after collimation lens set collimation, λ 1 and λ 3 incide wherein and one close photon unit, and λ 2 and λ 4 incide another and close photon unit; Wherein oblique 45 ° of a filtering diaphragm that closes photon unit is located in λ 1 input path, oppose that to λ 1 is high λ 3 is anti-reflection, oblique 45 ° of the first completely reflecting mirror is located in λ 3 input paths, λ 3 is reflexed on described filtering diaphragm, and be orthogonal on this filtering diaphragm with λ 1, the λ 3 of transmission afterwards and the λ 1 of reflection close bundle output, reflex to described light transmitting-receiving share on the first polarization splitting prism of optical texture through the second completely reflecting mirror; Another closes in the oblique 45 ° of input paths of being located at λ 2 of the filtering diaphragm of photon unit, oppose that to λ 2 is high λ 4 is anti-reflection, this closes in the oblique 45 ° of input paths of being located at λ 4 of the first completely reflecting mirror of photon unit, λ 4 is reflexed on described filtering diaphragm, and be orthogonal on this filtering diaphragm with λ 2, the λ 4 of transmission afterwards and the λ 2 of reflection close bundle output, reflex to described light transmitting-receiving share on the first polarization splitting prism of optical texture through the second completely reflecting mirror; The optical axis direction of described isolator is consistent with the polarization direction of incident light, is located between filtering diaphragm and the second completely reflecting mirror, or is located between the second completely reflecting mirror and the first polarization splitting prism.

Further, described WDM structure also comprises a half-wave plate, be located at described two and close between photon unit and the first polarization splitting prism, its optical axis direction and two closes photon unit output polarisation of light direction and is 45 ° of angles, by the two output light polarization direction half-twists that close photon unit.

Further, the light transmitting group of described TOSA comprises laser array and the collimation lens set of four different wave lengths; Described WDM structure comprises that two close photon unit, He Guang unit, the second level and isolator; The described photon unit that closes comprises the first completely reflecting mirror and filtering diaphragm; He Guang unit, the described second level comprises semi-permeable and semi-reflecting mirror and absorbing sheet; Wherein one close photon unit and also comprise one second completely reflecting mirror; Laser array is sent the linearly polarized light of λ 1, λ 2, λ 3 and 4 four different wave lengths of λ, and after collimation lens set collimation, λ 1 and λ 3 incide wherein and one close photon unit, and λ 2 and λ 4 incide another and close photon unit; Wherein oblique 45 ° of a filtering diaphragm that closes photon unit is located in λ 1 input path, oppose that to λ 1 is high λ 3 is anti-reflection, oblique 45 ° of the first completely reflecting mirror is located in λ 3 input paths, λ 3 is reflexed on described filtering diaphragm, and be orthogonal on this filtering diaphragm with λ 1, the λ 3 of transmission afterwards and the λ 1 of reflection close bundle output, reflex in described semi-permeable and semi-reflecting mirror through the second completely reflecting mirror; Another closes in the oblique 45 ° of input paths of being located at λ 2 of the filtering diaphragm of photon unit, oppose that to λ 2 is high λ 4 is anti-reflection, this closes in the oblique 45 ° of input paths of being located at λ 4 of the first completely reflecting mirror of photon unit, λ 4 is reflexed on described filtering diaphragm, and be orthogonal on this filtering diaphragm with λ 2, the λ 4 of transmission afterwards and the λ 2 of reflection close bundle output, are directly incident in described semi-permeable and semi-reflecting mirror, and meet on this semi-transflective reflective minute surface with the Shu Guangzheng that closes of λ 1 and λ 3; In this semi-permeable and semi-reflecting mirror, the λ 2 of transmission and λ 4 close the λ 1 of Shu Guangyu reflection and λ 3 and close Shu Guang and again close bundle and export on extinction sheet and be absorbed, the λ 2 of reflection and λ 4 close the λ 1 of Shu Guangyu transmission and λ 3 and close Shu Guang and again close bundle output, incide described light transmitting-receiving and share on the first polarization splitting prism of optical texture after described isolator; The optical axis direction of described isolator is consistent with the polarization direction of incident light, is unpolarized relevant isolator; Or described isolator is the relevant isolator of polarization, by 45 ° of the light polarization direction rotations through this isolator, and set up half of wave plate between this isolator and described the first polarization splitting prism, the optical axis direction of this half-wave plate and incident light polarization angular separation are 67.5 ° or 22.5 °.

Further, the light-receiving group of described ROSA comprises PD group and focus lens group; Described Wave Decomposition multiplexing structure comprises the first filtering diaphragm, the second filtering diaphragm, the 3rd filtering diaphragm and three completely reflecting mirrors; The optical signal that comprises four different wave length λ 1, λ 2, λ 3, λ 4 that described optical interface receives incides on this Wave Decomposition multiplexing structure after optical texture is share in light transmitting-receiving; Described the first filtering diaphragm is anti-reflection high anti-to λ 1-λ 3 to λ 4; Described the second filtering diaphragm is anti-reflection to λ 3, high anti-to λ 1 and λ 2; Described the 3rd filtering diaphragm is anti-reflection to λ 2, high anti-to λ 1; The optical signal that is share optical texture outgoing by light transmitting-receiving is directly incident on the first filtering diaphragm, wherein after the direct transmission of λ 4, converges to PD by focus lens group and organizes on corresponding PD; 3 of λ 1-λ are reflexed on completely reflecting mirror by this first filtering diaphragm, reflex on the second filtering diaphragm through completely reflecting mirror, wherein, converge to PD organize on corresponding PD after the direct transmission of λ 3 by focus lens group; 2 of λ 1 and λ are reflexed on another completely reflecting mirror by the second filtering diaphragm, reflex on the 3rd filtering diaphragm through this completely reflecting mirror, wherein, converge to PD organize on corresponding PD after the direct transmission of λ 2 by focus lens group; 1 of λ is reflexed on last completely reflecting mirror by the 3rd filtering diaphragm, after this completely reflecting mirror reflection, directly being converged to PD by focus lens group organizes on corresponding PD, or set up the 4th filtering diaphragm between this completely reflecting mirror and convergence set of lenses, anti-reflection to λ 1, high anti-to other wavelength light, the λ 1 being reflected by this completely reflecting mirror organizes on corresponding PD transmitted through converging to PD by focus lens group after the 4th filtering diaphragm.

Beneficial effect of the present invention is: utilize the combination of Faraday rotator, half-wave plate and polarization splitting prism to realize the orthogonal transformation of outgoing and receiving beam polarization state, make outgoing beam and receiving beam on polarization splitting prism, produce different trends to realize the function of single fiber bi-directional, greatly improve efficiency, saved resource, and simple and compact for structure, easy to assembly, effectively reduce Insertion Loss, improve coupling efficiency, there is good temperature performance, be conducive to the long Distance Transmission of optical signal.

Brief description of the drawings

Fig. 1 is single fiber bi-directional BOSA structure embodiment of the present invention mono-schematic diagram;

Fig. 2 is TOSA structure one and light path schematic diagram in BOSA structure;

Fig. 3 is ROSA structure and light path schematic diagram in BOSA structure;

Fig. 4 is TOSA structure two and light path schematic diagram in BOSA structure;

Fig. 5 is TOSA structure three and light path schematic diagram in BOSA structure;

Fig. 6 is and the corresponding ROSA end of the structure of TOSA shown in Fig. 5 three light path schematic diagram;

Fig. 7 is single fiber bi-directional BOSA structure embodiment bis-schematic diagrames.

Accompanying drawing indicates: 1, housing; 101, dividing plate; 2, optical texture is share in light transmitting-receiving; 21, the first polarization splitting prism; 22, Faraday rotator; 221, Faraday rotation sheet; 222, magnetic patch; 23, half wave plate group; 231, upper half-wave plate; 232, lower half-wave plate; 24, the second polarization splitting prism; 25, the 3rd polarization splitting prism; 26, half-wave plate; 27, sheet glass; 3, laser array; 4, collimation lens set; 5, WDM structure; 511, polarization splitting prism; 512, half-wave plate; 513, the first completely reflecting mirror; 514, the second completely reflecting mirror; 515, isolator; 521, the first completely reflecting mirror; 522, filtering diaphragm; 523, the second completely reflecting mirror; 524, isolator; 525, half-wave plate; 531, the first completely reflecting mirror; 532, filtering diaphragm; 533, the second completely reflecting mirror; 534, semi-permeable and semi-reflecting mirror; 535, extinction sheet; 536, isolator; 537, half-wave plate; 6, PD group; 7, focus lens group; 8, WDM structure; 801, the first filtering diaphragm; 802, the second filtering diaphragm; 803, the 3rd filtering diaphragm; 804, the 4th filtering diaphragm; 805, completely reflecting mirror; 9, single optical fiber calibrator.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the present invention will be further described.

The object of the present invention is to provide a kind of single fiber bi-directional BOSA structure for 4 passage high speed receive-transmit systems, directly on an optical fiber, carry out uplink and downlink transmission, without external device or equipment, greatly simplified system architecture, reduced operation cost. Concrete, this single fiber bi-directional BOSA structure, comprises encapsulating housing, TOSA and ROSA, described TOSA comprises light transmitting group and WDM structure; Described ROSA comprises light-receiving group and Wave Decomposition multiplexing structure; This BOSA structure also comprises that a light transmitting-receiving share optical texture; Described housing one end is provided with an optical interface, and the optical signal that optical interface receives share on the Wave Decomposition multiplexing structure that optical texture incides ROSA through the transmitting-receiving of described light; The flashlight of described TOSA transmitting, after its WDM structure closes light, share optical texture through described light transmitting-receiving and is transferred to described optical interface, by the flashlight of this optical interface output TOSA transmitting; Described TOSA, ROSA and light transmitting-receiving are share optical texture and are packaged in housing. Utilize the combination of Faraday rotator, half-wave plate and polarization splitting prism to realize the orthogonal transformation of outgoing and receiving beam polarization state, make outgoing beam and receiving beam on polarization splitting prism, produce different trends to realize the function of single fiber bi-directional. Concrete following embodiment.

Embodiment mono-as Figure 1-3, light transmitting-receiving is share optical texture 2 and is comprised the first polarization splitting prism 21, Faraday rotator 22, half wave plate group 23 and the second polarization splitting prism 24 that arrange according to light path, and is located at the photon structure that closes between the Wave Decomposition multiplexing structure 8 of ROSA and the first polarization splitting prism 21. Wherein, close photon structure and comprise the 3rd polarization splitting prism 25 and half of wave plate 26. The first polarization splitting prism 21, the second polarization splitting prism 24 and the 3rd polarization splitting prism 25 include two oblique 45 ° of polarization spectro faces that be arranged in parallel, and the first polarization splitting prism 21 and the second polarization splitting prism 24 and the vertical setting of the 3rd polarization splitting prism 25. Two polarization spectro faces of the first polarization splitting prism 21 lay respectively on WDM structure 5 output light paths of TOSA and on the input light path of ROSA Wave Decomposition multiplexing structure 8; Described half wave plate group 23 comprises half-wave plate 231 and lower half-wave plate 232, lays respectively in the light path that 24 two polarization beam splitter faces of the second polarization splitting prism are corresponding.

As Fig. 1, in housing 1, be divided into upper and lower two accommodation spaces independently by a central dividing plate 101, be respectively used to hold TOSA and ROSA. Dividing plate 101 is provided with a through hole, and the first polarization splitting prism 21 is arranged on this through hole, and two polarization spectro face lays respectively in two accommodation spaces. Faraday rotator 22, half wave plate group 23 and the second polarization splitting prism 24 are with TOSA with being located in the accommodation space on upper strata, and ROSA is located in lower floor's accommodation space. What optical interface adopted is single optical fiber calibrator 9, is located at the accommodation space one end that holds TOSA.

As Fig. 2, be the TOSA structure that this embodiment adopts, its light transmitting group comprises laser array 3 and the collimation lens set 4 of four different wave lengths; WDM structure 5 comprises that two close photon unit, this closes photon unit and comprises the first completely reflecting mirror 513, polarization splitting prism 511, half-wave plate 512, the second completely reflecting mirror 514 and isolator 515, and the angle of described half-wave plate 512 optical axis directions and horizontal polarization light is 45 °. Laser array 3 is sent the horizontal linear polarization light P light of λ 1, λ 2, λ 3 and 4 four different wave lengths of λ, and after collimation lens set 4 collimations, λ 1 and λ 2 incide wherein and one close photon unit, and λ 3 and λ 4 incide another and close photon unit. What be arranged in λ 1 and λ 2 light paths closes photon unit, and its half-wave plate 512 is located at before polarization splitting prism 511, be positioned in the input path of λ 1, and be S light by the polarization direction half-twist of the λ of incident 1; Its first completely reflecting mirror 513 is positioned in the input path of λ 2, by λ 2(P light) reflex on its polarization splitting prism 511, and be orthogonal on the light splitting surface of this polarization splitting prism 511 with λ 1, λ 1(S light) and λ 2(P light) after 511 reflections of this polarization splitting prism and transmission, close bundle output respectively, and reflex to light by the second completely reflecting mirror 514 and receive and dispatch and share on the first polarization splitting prism 21 of optical texture 2. Similarly, λ 3 and λ 4 also close bundle output respectively after the polarization splitting prism that closes photon unit 511 reflection at its place and transmission, and reflex to described light by the second completely reflecting mirror 514 and receive and dispatch and share on the first polarization splitting prism 21 of optical texture 2. In this TOSA structure, the isolator 515 that closes photon unit is the relevant isolator of polarization, the polarization direction of the linearly polarized light through its isolation is rotated to 45 ° again, this isolator 515 is located at polarization splitting prism 511 and second and is all-trans between light-radiating lens 514, or be located between the second completely reflecting mirror 514 and the first polarization splitting prism 21, its optical axis direction and horizontal polarization light P light and vertically polarised light S light are all 45 ° of angles, and two to close isolator 515 optical axis directions of photon unit consistent. In this structure, close the λ 1 of bundle and λ 2 after the second completely reflecting mirror 514 reflections, incide on the first polarization splitting prism 21 through isolator 515, the λ 1 of S light and the λ 2 of P light incide isolator 515, λ 1 is to only have the polarized component consistent with isolator 515 optical axis directions (45 °) to pass through with λ 2, and rotated again and after 45 °, become the S of vertical polarization light by this isolator 515, incide afterwards on the first polarization splitting prism 21. And the λ 3 and the λ 4 that close bundle first also export the S light of vertical polarization after same isolator 515, then reflex on the first polarization splitting prism 21 through the second completely reflecting mirror 514, and two bundle S light light paths are parallel to each other. Due to the first polarization splitting prism 21 and the second polarization splitting prism 24, close photon unit polarization splitting prism 511 mutually vertical, so S light is P light for the first polarization splitting prism 21, can directly incide on Faraday rotator 22 transmitted through the first polarization splitting prism 21 therefore close the λ 1 of bundle and λ 2, λ 3 and λ 4. This Faraday rotator 22 comprises the magnetic patch 222 at Faraday rotation sheet 221 and two ends thereof, can be by 45 ° of the polarization direction rotations of the linearly polarized light of process, taking clockwise as example illustrates, S light transmitted through the vertical polarization of the first polarization splitting prism 21 has all been turned clockwise 45 ° after Faraday rotator 22, incides respectively afterwards upper half-wave plate 231 and the lower half-wave plate 232 of half wave plate group 23. The optical axis angle of wherein going up half-wave plate 231 is 22.5 °, and the Shu Guang that closes of λ 1 and λ 2 incides and on this, after half-wave plate 231, again turned clockwise 45 ° and become P light and incide on the second polarization splitting prism 24; The optical axis angle of lower half-wave plate 232 is 67.5 °, and the Shu Guang that closes of λ 3 and λ 4 incides these lower half-wave plate 232 rear polarizer directions and has been rotated counterclockwise 45 ° and become S light and incide on the second polarization splitting prism 24. The P light (λ 1 and λ 2 close Shu Guang) that incides the second polarization splitting prism 24 directly transmission outputs on single optical fiber calibrator 9, the S light (λ 3 and λ 4 close Shu Guang) that incides the second polarization splitting prism 24 closes bundle output with λ 1 and λ 2 after the reflection of 24 two polarization spectro faces of the second polarization splitting prism, and be coupled in optical fiber through single optical fiber calibrator 9, realize the transmission of TOSA Duan Si road light and closed bundle.

As Fig. 3, be the ROSA structure that this embodiment adopts, its light-receiving group comprises PD group 6 and focus lens group 7, Wave Decomposition multiplexing structure 8 comprises the first filtering diaphragm 801, the second filtering diaphragm 802, the 3rd filtering diaphragm 803 and three completely reflecting mirrors 805. Wherein, the first filtering diaphragm 801 is anti-reflection high anti-to λ 1-λ 3 to λ 4, is arranged in the light path of λ 4; The second filtering diaphragm 802 is anti-reflection to λ 3, high anti-to λ 1 and λ 2, is arranged in the light path of λ 3; The 3rd filtering diaphragm 803 is anti-reflection to λ 2, high anti-to λ 1, is arranged in the light path of λ 2. Three completely reflecting mirrors 805 are located at respectively after the second filtering diaphragm 802, the 3rd filtering diaphragm 803 is below and in the light path of λ 1. In this structure, also at the completely reflecting mirror 805 of λ 1 light path and assemble between set of lenses 7 and set up the 4th filtering diaphragm 804, anti-reflection to λ 1, high anti-to other wavelength light. The optical signal being received by single optical fiber calibrator 9 includes flashlight λ 1, λ 2, λ 3 and the λ 4 of four road different wave lengths, this light beam is through being divided into orthogonal two bundle directional light P light and the S light of polarization state after the second polarization splitting prism 24, wherein P light is directly transmitted through the second polarization splitting prism 24, S light is exported from polarization spectro face below after twice reflection of two polarization spectro face, and parallel with P optical transmission direction. Wherein P light is through turned clockwise after half-wave plate on 22.5 231 45 ° (seeing in face of this P optical propagation direction), after reentering afterwards and being mapped to Faraday rotator 22, be rotated counterclockwise 45 ° and be reduced to P light by Faraday rotator 22, because of this direction of propagation contrary with the direction of propagation of the end of TOSA before, see in face of optical propagation direction equally, Faraday rotator 22 is respectively clockwise its direction of rotation and is counterclockwise. And S light is through being rotated counterclockwise 45 ° after 67.5 ° of lower half-wave plates 232, after reentering afterwards and being mapped to Faraday rotator 22, be rotated counterclockwise again 45 ° and become P light by Faraday rotator 22. The optical signal of so far incident is divided into the parallel P light of two-way and incides on the first polarization splitting prism 21. Because the first polarization splitting prism 21 is mutually vertical with the second polarization splitting prism 24, therefore the P light of incident is S light for it, thereby two polarization spectro faces by the first polarization splitting prism 21 reflex to its underpart, polarization spectro face output below it, and incide ROSA end, as shown in Figure 1. As Fig. 3, from the two parallel P light (being S light for the first polarization splitting prism 21) of the first polarization splitting prism 21 outgoing, incide and close on photon structure, wherein a road P polarisation of light direction becomes S light through half-wave plate 26 half-twists of 45 ° of settings and incides on the 3rd polarization splitting prism 25, the direct incident of another road P light or incide on the 3rd polarization splitting prism 25 through a sheet glass 27, directly, transmitted through the 3rd polarization splitting prism 25, S light is exported with P combiner after two polarization spectro face reflections of the 3rd polarization splitting prism 25. This closes on the first filtering diaphragm 801 that Shu Guang incides Wave Decomposition multiplexing structure 8, wherein after the direct transmission of λ 4, converged on the PD that PD organizes 6 correspondences by focus lens group 7,3 of λ 1-λ are reflexed on completely reflecting mirror 805 by this first filtering diaphragm 801, reflex on the second filtering diaphragm 802 through completely reflecting mirror 805, wherein, after the direct transmission of λ 3, converged on the PD that PD organizes 6 correspondences by focus lens group 7; 2 of λ 1 and λ are reflexed on another completely reflecting mirror 805 by the second filtering diaphragm 802, reflex on the 3rd filtering diaphragm 803 through this completely reflecting mirror 805, wherein, after the direct transmission of λ 2, are converged on the PD that PD organizes 6 correspondences by focus lens group 7; 1 of λ is reflexed on last completely reflecting mirror 805 by the 3rd filtering diaphragm 803, after these completely reflecting mirror 805 reflections, incide on the 4th filtering diaphragm 804, transmitted through converging to PD by focus lens group 7 after the 4th filtering diaphragm 804, to organize the PD of 6 correspondences upper, realizes demultiplexing and the reception of four-way signal beams.

Be illustrated in figure 4 another structure that TOSA end adopts, its light transmitting group comprises laser array 3 and the collimation lens set 4 of four different wave lengths, WDM structure 5 comprises that two close photon unit, described in close photon unit and comprise the first completely reflecting mirror 521, filtering diaphragm 522, the second completely reflecting mirror 523 and isolator 524. preferably, in this structure, close between photon unit and the first polarization splitting prism 21 and be also provided with half of wave plate 525 at two, its optical axis direction and two closes photon unit output polarisation of light direction and is 45 ° of angles, by the two output light polarization direction half-twists that close photon unit. laser array 3 is sent the horizontal linear polarization light P light of λ 1, λ 2, λ 3 and 4 four different wave lengths of λ, and after collimation lens set 4 collimations, λ 1 and λ 3 incide wherein and one close photon unit, and λ 2 and λ 4 incide another and close photon unit. wherein, what be arranged in λ 1 and λ 3 light paths closes photon unit, oblique 45 ° of filtering diaphragm 522 is located in λ 1 input path, oppose that to λ 1 is high λ 3 is anti-reflection, oblique 45 ° of the first completely reflecting mirror 521 is located in λ 3 input paths, λ 3 is reflexed on described filtering diaphragm 522, and be orthogonal on this filtering diaphragm 522 with λ 1, the λ 3 of transmission afterwards and the λ 1 of reflection close bundle output, reflex on isolator 524 through the second completely reflecting mirror 523, these isolator 524 optical axis directions are consistent with light beam polarization direction, the light beam of exporting through isolator 524 is still P light, incide again on described half-wave plate 525. another closes in photon unit, in the oblique 45 ° of input paths of being located at λ 2 of filtering diaphragm 52, oppose that to λ 2 is high λ 4 is anti-reflection, this closes in the oblique 45 ° of input paths of being located at λ 4 of the first completely reflecting mirror 521 of photon unit, λ 4 is reflexed on described filtering diaphragm 522, and be orthogonal on this filtering diaphragm 522 with λ 2, the λ 4 of transmission afterwards and the λ 2 of reflection close bundle output, after isolator 524, reflex to the Shu Guang that closes of λ 1 and λ 3 and be parallel to each other by the second completely reflecting mirror 523, and incide on described half-wave plate 525, same, it is consistent with light beam polarization direction that this closes isolator 524 optical axis directions in photon unit, and the light beam of exporting through this isolator 524 is still P light. two parallel P light incide described half-wave plate 525, this half-wave plate optical axis direction is 45 ° of settings, 90 ° of two P polarisation of light direction rotations are become to two bundle S light and incide on the first polarization splitting prism 21, it is identical that light path in optical texture is share in the light transmitting-receiving of light path afterwards and the structure of TOSA shown in Fig. 2 rear end.

As shown in Figure 5 be the another structure that TOSA end adopts, its light transmitting group comprises laser array 3 and the collimation lens set 4 of four different wave lengths; Described WDM structure 5 comprises that two close photon unit, He Guang unit, the second level and isolator 536; The described photon unit that closes comprises the first completely reflecting mirror 531 and filtering diaphragm 532; He Guang unit, the described second level comprises semi-permeable and semi-reflecting mirror 534 and absorbing sheet 535; Wherein one close photon unit and also comprise one second completely reflecting mirror 533. Laser array 3 is sent the horizontal linear polarization light P light of λ 1, λ 2, λ 3 and 4 four different wave lengths of λ, and after collimation lens set 4 collimations, λ 1 and λ 3 incide wherein and one close photon unit, and λ 2 and λ 4 incide another and close photon unit. Wherein, what be arranged in λ 1 and λ 3 light paths closes photon unit, oblique 45 ° of filtering diaphragm 532 is located in λ 1 input path, oppose that to λ 1 is high λ 3 is anti-reflection, oblique 45 ° of the first completely reflecting mirror 531 is located in λ 3 input paths, λ 3 is reflexed on described filtering diaphragm 532, and be orthogonal on this filtering diaphragm 532 with λ 1, the λ 3 of transmission afterwards and the λ 1 of reflection close bundle output, reflex in described semi-permeable and semi-reflecting mirror 534 through the second completely reflecting mirror 533; Another closes in photon unit, in the oblique 45 ° of input paths of being located at λ 2 of filtering diaphragm 532, oppose that to λ 2 is high λ 4 is anti-reflection, this closes in the oblique 45 ° of input paths of being located at λ 4 of the first completely reflecting mirror 531 of photon unit, λ 4 is reflexed on described filtering diaphragm 532, and be orthogonal on this filtering diaphragm 532 with λ 2, the λ 4 of transmission afterwards and the λ 2 of reflection close bundle output, be directly incident in described semi-permeable and semi-reflecting mirror 534, and meet in 534 of this semi-permeable and semi-reflecting mirror with the Shu Guangzheng that closes of λ 1 and λ 3; In this semi-permeable and semi-reflecting mirror 534, the λ 2 of transmission and λ 4 close the λ 1 of Shu Guangyu reflection and λ 3 and close Shu Guang and again close bundle and export on extinction sheet 535 and be absorbed, the λ 2 of reflection and λ 4 close the λ 1 of Shu Guangyu transmission and λ 3 and close Shu Guang and again close bundle output, and the bundle light P light that closes of λ 1-λ 4 incides described light transmitting-receiving and share on the first polarization splitting prism 21 of optical texture 2 after described isolator 536. The optical axis direction of isolator 536 is consistent with the polarization direction of incident light, for unpolarized relevant isolator, and optical axis is set between isolator 536 and the first polarization splitting prism 21 is the half-wave plate 537 of 45 °, the P light of incident is rotated to be to 90 ° to be become S light and incides on the first polarization splitting prism 21. Or isolator 536 is the relevant isolator of polarization, taking counterclockwise as example, the P light polarization direction of incident is rotated counterclockwise to 45 °, and optical axis is set between isolator 536 and the first polarization splitting prism 21 is the half-wave plate 537 of 67.5 °, the direction of polarized light that isolator 536 is exported is rotated counterclockwise 45 ° and become S light again, then incides on the first polarization splitting prism 21. Arrange because the first polarization splitting prism 21 is vertical with other polarization splitting prism, therefore the S light of incident is P light for the first polarization splitting prism 21, can, directly transmitted through its polarization spectro face, incide on Faraday rotator.

In this structure, because the light beam of TOSA direction share on optical texture 2 for being combined into light beam transmission in light transmitting-receiving, therefore Faraday rotator 22 can only be located at that polarization beam splitter face in front of the second polarization splitting prism 24 correspondences, on another one polarization spectro face output light path, do not need Faraday rotator 22, only need the half-wave plate of 45 ° of settings of an optical axis that the reception light half-twist of ROSA end is carried out to orthogonal transformation. Specifically as shown in Figure 5, the S light of TOSA output is transmitted through turning clockwise 45 ° by Faraday rotator 22 after the first polarization splitting prism 21, turn clockwise 45 ° and become P light through the upper half-wave plate 231 of 22.5 ° more afterwards, thereby directly transmitted through the second polarization spectroscope 24, and be coupled in optical fiber by single optical fiber calibrator 9, realize the transmission of TOSA Duan Si road light and closed bundle. As shown in Figure 6, in this structure, the optical signal that single optical fiber calibrator 9 receives includes flashlight λ 1, λ 2, λ 3 and the λ 4 of four road different wave lengths, this light beam is through being divided into orthogonal two bundle directional light P light and the S light of polarization state after the second polarization splitting prism 24, wherein P light is directly transmitted through the second polarization splitting prism 24, S light is exported from polarization spectro face below after twice reflection of two polarization spectro face, and parallel with P optical transmission direction. Wherein P light is through turned clockwise after half-wave plate on 22.5 231 45 ° (seeing in face of this P optical propagation direction), reenter afterwards and be mapped to Faraday rotator 22, be rotated counterclockwise 45 ° and be reduced to P light by Faraday rotator 22, because of this direction of propagation contrary with the direction of propagation of the end of TOSA before, see in face of optical propagation direction equally, Faraday rotator 22 is respectively clockwise its direction of rotation and is counterclockwise. S light is directly incident on the first polarization splitting prism 21 after lower half-wave plate 232 half-twists of 45 ° of settings become P light. Two bundle P light reflex to its underpart through two polarization spectro faces of the first polarization splitting prism 21, the polarization spectro face output below it, and incide ROSA end, light path is afterwards the same with structure shown in Fig. 3.

As shown in Figure 7, for BOSA structure embodiment bis-of the present invention, different from structure one is, light transmitting-receiving is share Faraday rotator 22, half wave plate group 23 second polarization splitting prisms 34 of optical texture 2 and is located in lower floor's accommodation space of housing with ROSA end is same, accordingly, optical interface is also located at accommodation space one end face that holds ROSA. Its internal structure only needs to make the polarization state of its light beam carry out corresponding orthogonal transformation by the setting of half-wave plate. For example, the light polarization of TOSA end output is transformed to P light to be incided on the first polarization splitting prism 21, this P light is S light for the first polarization splitting prism 21, therefore reflex to its underpart through 21 two polarization spectro faces of the first polarization splitting prism, incide afterwards on Faraday rotator 22. Equally, the flashlight receiving through single optical fiber calibrator 9 is by corresponding conversion, become S light and incide on the first polarization splitting prism 21, then directly incide and close photon structure and close on the Wave Decomposition multiplexing structure 8 that Shu Houzai enters ROSA transmitted through the first polarization splitting prism 21.

The various embodiments described above utilize the combination of Faraday rotator, half-wave plate and polarization splitting prism to realize the orthogonal transformation of outgoing and receiving beam polarization state, make outgoing beam and receiving beam on polarization splitting prism, produce different trends to realize the function of single fiber bi-directional, greatly improve efficiency, saved resource, and simple and compact for structure, easy to assembly, effectively reduce Insertion Loss, improve coupling efficiency, there is good temperature performance, be conducive to the long Distance Transmission of optical signal.

Although specifically show and introduced the present invention in conjunction with preferred embodiment; but those skilled in the art should be understood that; not departing from the spirit and scope of the present invention that appended claims limits; the various variations of in the form and details the present invention being made, are protection scope of the present invention.

Claims (9)

1. a single fiber bi-directional BOSA structure, comprises encapsulating housing, TOSA and ROSA, and described TOSA comprises light transmitting group and WDM structure: described ROSA comprises light-receiving group and Wave Decomposition multiplexing structure, it is characterized in that: also comprise that a light transmitting-receiving share optical texture, described housing one end is provided with an optical interface, and the optical signal that optical interface receives share on the Wave Decomposition multiplexing structure that optical texture incides ROSA through the transmitting-receiving of described light, the flashlight of described TOSA transmitting, after its WDM structure closes light, share optical texture through described light transmitting-receiving and is transferred to described optical interface, by the flashlight of this optical interface output TOSA transmitting, described TOSA, ROSA and light transmitting-receiving are share optical texture and are packaged in housing, the transmitting-receiving of described light is share optical texture and is comprised the first polarization splitting prism, Faraday rotator, half wave plate group and the second polarization splitting prism that arrange according to light path, and is located at the photon structure that closes between the Wave Decomposition multiplexing structure of ROSA and the first polarization splitting prism, described the first polarization splitting prism and the second polarization splitting prism include two oblique 45 ° of polarization spectro faces that be arranged in parallel, and two polarization splitting prisms vertical setting mutually, two polarization spectro faces of described the first polarization splitting prism lay respectively on the WDM structure output light path of TOSA and on the input light path of ROSA Wave Decomposition multiplexing structure, described half wave plate group comprises half-wave plate and lower half-wave plate, lays respectively in the light path that two polarization beam splitter faces of the second polarization splitting prism are corresponding, the combination of described half wave plate group and Faraday rotator, together by the light polarization direction half-twist by half wave plate group and Faraday rotator or 0 °, flashlight by described optical interface incident is divided into S light and P light two-route wire polarised light through the second polarization splitting prism, two-route wire polarised light is respectively through upper half-wave plate and lower half-wave plate, again by after Faraday rotator, two linearly polarized lights be all rotated become P light by the first polarization splitting prism two secondary reflections after incident close photon structure, ECDC photon structure is combined in the Wave Decomposition multiplexing structure that light beam incides ROSA, and the linearly polarized light of the WDM structure of TOSA output is directly transmitted through inciding Faraday rotator after the first polarization splitting prism, after half wave plate group and the second polarization splitting prism, exported by described optical interface, or two linearly polarized light all become S light after the Faraday rotator and incide after directly transmitted through the first polarization splitting prism and close photon structure, ECDC photon structure is combined in the Wave Decomposition multiplexing structure that light beam incides ROSA, the linearly polarized light of the WDM structure output of described TOSA incides Faraday rotator after two secondary reflections of the first polarization splitting prism, after half wave plate group and the second polarization splitting prism, is exported by described optical interface.
2. single fiber bi-directional BOSA structure as claimed in claim 1, is characterized in that: described in close photon structure and comprise the 3rd polarization splitting prism and half of wave plate; Described the 3rd polarization splitting prism comprises two oblique 45 ° of polarization spectro faces that be arranged in parallel, in light path corresponding to a described half-wave plate polarization beam splitter face located therein, between the 3rd polarization splitting prism and the first polarization splitting prism, the angle of its optical axis direction and horizontal polarization light is 45 °.
3. single fiber bi-directional BOSA structure as claimed in claim 2, it is characterized in that: between described the 3rd polarization splitting prism and the first polarization splitting prism, be also provided with a sheet glass, arranged side by side with described half-wave plate, be located in the light path that the 3rd another polarization beam splitter face of polarization splitting prism is corresponding.
4. single fiber bi-directional BOSA structure as described in claim 2-3 any one, is characterized in that: in described housing, be divided into two independently accommodation spaces by a central dividing plate, be respectively used to hold TOSA and ROSA; Described dividing plate is provided with a through hole, and described the first polarization splitting prism is arranged on this through hole, and two polarization spectro face lays respectively in two accommodation spaces; Described Faraday rotator, half wave plate group and the second polarization splitting prism and TOSA are located in one accommodation space, or are located in one accommodation space with ROSA.
5. single fiber bi-directional BOSA structure as described in claim 2-3 any one, is characterized in that: the light transmitting group of described TOSA comprises laser array and the collimation lens set of four different wave lengths, described WDM structure comprises that two close photon unit, described in close photon unit and comprise the first completely reflecting mirror, polarization splitting prism, half-wave plate, the second completely reflecting mirror and isolator, the angle of described half-wave plate optical axis direction and horizontal polarization light is 45 °, laser array is sent the linearly polarized light of λ 1, λ 2, λ 3 and 4 four different wave lengths of λ, and after collimation lens set collimation, λ 1 and λ 2 incide wherein and one close photon unit, and λ 3 and λ 4 incide another and close photon unit, the described half-wave plate that closes photon unit is located at before polarization splitting prism, be positioned in the input path of λ 1 or λ 3, by the polarization direction half-twist of the λ of incident 1 or λ 3, described the first completely reflecting mirror is positioned in the input path of λ 2 or λ 4, λ 2 or λ 4 are reflexed on described polarization splitting prism, and be orthogonal on the light splitting surface of this polarization splitting prism with λ 1 or λ 3, λ 1 and λ 2 close bundle respectively and export after same polarization splitting prism reflection of closing photon unit and transmission, and reflex to the transmitting-receiving of described light by the second completely reflecting mirror and share on the first polarization splitting prism of optical texture, λ 3 and λ 4 also close bundle output respectively after the polarization splitting prism reflection of closing photon unit at its place and transmission, and reflex to described light by the second completely reflecting mirror and receive and dispatch and share on the first polarization splitting prism of optical texture, the described isolator that closes photon unit is the relevant isolator of polarization, the polarization direction of the linearly polarized light through its isolation is rotated to 45 ° again, this isolator is located at polarization splitting prism and second and is all-trans between light-radiating lens, or be located between the second completely reflecting mirror and the first polarization splitting prism, its optical axis direction and level and vertically polarised light are all 45 ° of angles, and two to close the isolator optical axis direction of photon unit consistent.
6. single fiber bi-directional BOSA structure as described in claim 2-3 any one, is characterized in that: the light transmitting group of described TOSA comprises laser array and the collimation lens set of four different wave lengths; Described WDM structure comprises that two close photon unit, described in close photon unit and comprise the first completely reflecting mirror, filtering diaphragm, the second completely reflecting mirror and isolator; Laser array is sent the linearly polarized light of λ 1, λ 2, λ 3 and 4 four different wave lengths of λ, and after collimation lens set collimation, λ 1 and λ 3 incide wherein and one close photon unit, and λ 2 and λ 4 incide another and close photon unit; Wherein oblique 45 ° of a filtering diaphragm that closes photon unit is located in λ 1 input path, oppose that to λ 1 is high λ 3 is anti-reflection, oblique 45 ° of the first completely reflecting mirror is located in λ 3 input paths, λ 3 is reflexed on described filtering diaphragm, and be orthogonal on this filtering diaphragm with λ 1, the λ 3 of transmission afterwards and the λ 1 of reflection close bundle output, reflex to described light transmitting-receiving share on the first polarization splitting prism of optical texture through the second completely reflecting mirror; Another closes in the oblique 45 ° of input paths of being located at λ 2 of the filtering diaphragm of photon unit, oppose that to λ 2 is high λ 4 is anti-reflection, this closes in the oblique 45 ° of input paths of being located at λ 4 of the first completely reflecting mirror of photon unit, λ 4 is reflexed on described filtering diaphragm, and be orthogonal on this filtering diaphragm with λ 2, the λ 4 of transmission afterwards and the λ 2 of reflection close bundle output, reflex to described light transmitting-receiving share on the first polarization splitting prism of optical texture through the second completely reflecting mirror; The optical axis direction of described isolator is consistent with the polarization direction of incident light, is located between filtering diaphragm and the second completely reflecting mirror, or is located between the second completely reflecting mirror and the first polarization splitting prism.
7. single fiber bi-directional BOSA structure as claimed in claim 6, it is characterized in that: described WDM structure also comprises a half-wave plate, being located at described two closes between photon unit and the first polarization splitting prism, its optical axis direction and two closes photon unit output polarisation of light direction and is 45 ° of angles, by the two output light polarization direction half-twists that close photon unit.
8. single fiber bi-directional BOSA structure as described in claim 2-3 any one, is characterized in that: the light transmitting group of described TOSA comprises laser array and the collimation lens set of four different wave lengths; Described WDM structure comprises that two close photon unit, He Guang unit, the second level and isolator; The described photon unit that closes comprises the first completely reflecting mirror and filtering diaphragm; He Guang unit, the described second level comprises semi-permeable and semi-reflecting mirror and absorbing sheet; Wherein one close photon unit and also comprise one second completely reflecting mirror; Laser array is sent the linearly polarized light of λ 1, λ 2, λ 3 and 4 four different wave lengths of λ, and after collimation lens set collimation, λ 1 and λ 3 incide wherein and one close photon unit, and λ 2 and λ 4 incide another and close photon unit; Wherein oblique 45 ° of a filtering diaphragm that closes photon unit is located in λ 1 input path, oppose that to λ 1 is high λ 3 is anti-reflection, oblique 45 ° of the first completely reflecting mirror is located in λ 3 input paths, λ 3 is reflexed on described filtering diaphragm, and be orthogonal on this filtering diaphragm with λ 1, the λ 3 of transmission afterwards and the λ 1 of reflection close bundle output, reflex in described semi-permeable and semi-reflecting mirror through the second completely reflecting mirror; Another closes in the oblique 45 ° of input paths of being located at λ 2 of the filtering diaphragm of photon unit, oppose that to λ 2 is high λ 4 is anti-reflection, this closes in the oblique 45 ° of input paths of being located at λ 4 of the first completely reflecting mirror of photon unit, λ 4 is reflexed on described filtering diaphragm, and be orthogonal on this filtering diaphragm with λ 2, the λ 4 of transmission afterwards and the λ 2 of reflection close bundle output, are directly incident in described semi-permeable and semi-reflecting mirror, and meet on this semi-transflective reflective minute surface with the Shu Guangzheng that closes of λ 1 and λ 3; In this semi-permeable and semi-reflecting mirror, the λ 2 of transmission and λ 4 close the λ 1 of Shu Guangyu reflection and λ 3 and close Shu Guang and again close bundle and export on extinction sheet and be absorbed, the λ 2 of reflection and λ 4 close the λ 1 of Shu Guangyu transmission and λ 3 and close Shu Guang and again close bundle output, incide described light transmitting-receiving and share on the first polarization splitting prism of optical texture after described isolator; The optical axis direction of described isolator is consistent with the polarization direction of incident light, is unpolarized relevant isolator; Or described isolator is the relevant isolator of polarization, by 45 ° of the light polarization direction rotations through this isolator, and set up half of wave plate between this isolator and described the first polarization splitting prism, the optical axis direction of this half-wave plate and incident light polarization angular separation are 67.5 ° or 22.5 °.
9. single fiber bi-directional BOSA structure as described in claim 2-3 any one, is characterized in that: the light-receiving group of described ROSA comprises PD group and focus lens group; Described Wave Decomposition multiplexing structure comprises the first filtering diaphragm, the second filtering diaphragm, the 3rd filtering diaphragm and three completely reflecting mirrors; The optical signal that comprises four different wave length λ 1, λ 2, λ 3, λ 4 that described optical interface receives incides on this Wave Decomposition multiplexing structure after optical texture is share in light transmitting-receiving; Described the first filtering diaphragm is anti-reflection high anti-to λ 1-λ 3 to λ 4; Described the second filtering diaphragm is anti-reflection to λ 3, high anti-to λ 1 and λ 2; Described the 3rd filtering diaphragm is anti-reflection to λ 2, high anti-to λ 1; The optical signal that is share optical texture outgoing by light transmitting-receiving is directly incident on the first filtering diaphragm, wherein after the direct transmission of λ 4, converges to PD by focus lens group and organizes on corresponding PD; 3 of λ 1-λ are reflexed on completely reflecting mirror by this first filtering diaphragm, reflex on the second filtering diaphragm through completely reflecting mirror, wherein, converge to PD organize on corresponding PD after the direct transmission of λ 3 by focus lens group; 2 of λ 1 and λ are reflexed on another completely reflecting mirror by the second filtering diaphragm, reflex on the 3rd filtering diaphragm through this completely reflecting mirror, wherein, converge to PD organize on corresponding PD after the direct transmission of λ 2 by focus lens group; 1 of λ is reflexed on last completely reflecting mirror by the 3rd filtering diaphragm, after this completely reflecting mirror reflection, directly being converged to PD by focus lens group organizes on corresponding PD, or set up the 4th filtering diaphragm between this completely reflecting mirror and convergence set of lenses, anti-reflection to λ 1, high anti-to other wavelength light, the λ 1 being reflected by this completely reflecting mirror organizes on corresponding PD transmitted through converging to PD by focus lens group after the 4th filtering diaphragm.
CN201310424754.5A 2013-09-18 2013-09-18 A kind of single fiber bi-directional BOSA structure CN104459904B (en)

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CN102195713A (en) * 2011-06-26 2011-09-21 成都网动光电子技术有限公司 1*9 single-fiber bidirectional optical module with digital monitoring function
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