CN202870341U - Optical hybrid with high polarization beam-splitting performance - Google Patents
Optical hybrid with high polarization beam-splitting performance Download PDFInfo
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- CN202870341U CN202870341U CN 201220463684 CN201220463684U CN202870341U CN 202870341 U CN202870341 U CN 202870341U CN 201220463684 CN201220463684 CN 201220463684 CN 201220463684 U CN201220463684 U CN 201220463684U CN 202870341 U CN202870341 U CN 202870341U
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Abstract
The utility model discloses an optical hybrid with high polarization beam-splitting performance. The optical hybrid comprises a beam splitting assembly and a beam combination device, wherein the beam splitting assembly is composed of a polarization rhombic prism and a non-polarization rhombic prism arranged on the other side. The optical hybrid is characterized in that, at least two polarizers are arranged between the polarization rhombic prism and the beam combination device, wherein a signal light S and a reference light L are split into light beams of Sx, Sy, Lx and Ly by the beam splitting assembly, and each of the light beams is split into two paths of I and Q by a horizontal X/Y axis, such that eight light beams of Sxi, Sxq, Lxi, Lxq, Syi, Syq, Lyi and Lyq are obtained; and the light beams of the same polarization are unified by the polarizers and combined by the beam combination device such that light beams of XI(Sx+Lx), XQ(Sx+jLx), YI(Sy+Ly) and YQ(Sy+jLy) are obtained and output through a port. According to the utility model, the uniformity of the polarization of the polarization light beams before interference is ensured by the polarizers, so that the polarization beam-splitting performance of the optical hybrid is improved and the demodulation capability is improved.
Description
Technical field
The utility model relates to a kind of smooth mixing arrangement, particularly relates to a kind of polarization spectro performance and obviously improves, and improves the light mixing arrangement of demodulation ability.
Background technology
Optical demodulator (optical mixer) is the important optical device of a class of optical fiber telecommunications system, is used for separating dim signal and light signal is converted into electric signal, thereby learn amplitude and the phase place of incident light.
Because the output signal of optical demodulator is disperseed, it is larger to take the light path volume, and reliability is low, along with the continuous complicated and cost requirement of fiber optic network, people in the urgent need to can integrated, the easy expansion of modularization, cost is low and reliability is high light mixing arrangement, optical mixer (Optical Hybrid) adopts the coherent optics Detection Techniques, is the important optical device of a class of optical communication system.Free Space Optics is the technology of a comparative maturity, have the advantages such as Insertion Loss is little, temperature stability is good, be widely applied at optical device such as Wavelength Locker, Interleaver, DPSK, the optical mixer complex structure of prior art, the output signal port distributes in disorder.
Wherein, the polarization spectro performance is an important indicator of optical mixer, directly determines the signal demodulation ability, thereby the polarization spectro performance of raising light mixing arrangement is necessary.
Summary of the invention
The utility model provides a kind of polarization spectro performance obviously to improve, and improves the light mixing arrangement of demodulation ability.
In order to realize its purpose, the utility model provides a kind of optical mixer with high polarization spectro performance, comprise spectrum groupware and splicer spare, described spectrum groupware is comprised of a polarization rhombic prism and a unpolarized rhombic prism that is arranged on its another side, it is characterized in that: comprise at least two polarizers between described polarization rhombic prism and the splicer, wherein, flashlight S and reference light L light are divided into Sx by spectrum groupware, Sy, Lx, Ly, every Shu Guang is divided into I by horizontal X/Y axle, the Q two-way, be divided into Sxi, Sxq, Lxi, Lxq, Syi, Syq, Lyi, Lyq eight bundle light signals, same polarizing beam is respectively by first, after two polarizers are unified its polarization state, by the synthetic light XI (Sx+Lx) of splicer spare, light beam XQ (Sx+jLx), light beam YI (Sy+Ly), light beam YQ (Sy+jLy) exports by port.
Wherein, preferred version is: described the first polarizer is mutually vertical with the polarization state of the second polarizer.
The utility model obviously improves the polarization spectro performance of optical mixer by be provided with two polarizers between spectrum groupware and splicer spare, improve its demodulation ability.
Description of drawings
Fig. 1 be a kind of optical mixer the first embodiment with high polarization spectro performance of the utility model face the structural principle synoptic diagram.
Figure 1A is a kind of plan structure principle schematic with optical mixer first embodiment of high polarization spectro performance of the utility model.
Fig. 2 be a kind of optical mixer the second embodiment with high polarization spectro performance of the utility model face the structural principle synoptic diagram.
Fig. 2 A is a kind of left TV structure principle schematic with optical mixer second embodiment of high polarization spectro performance of the utility model.
Embodiment
Lower to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.
Such as Fig. 1, shown in Figure 1A, the optical mixer that has high polarization spectro performance for the utility model is a kind of, described optical mixer comprises spectrum groupware 11, splicer spare 12 and the first polarizer 131 and the second polarizer 132 that are arranged on above-mentioned two devices centre, in order to regulate the phase place of light signal, in spectrum groupware 11, between the splicer spare 12, the first polarizer 131, be provided with at least two phase adjusted pieces 14 before the second polarizer 132, phase adjusted piece 14 is used for adjusting the phase place of light signal, phase place and the needed value of light signal are complementary, described spectrum groupware 11 is comprised of a polarization rhombic prism 111 and a unpolarized rhombic prism 112 that is arranged on its another side, described polarization rhombic prism 111 is fixedly connected with by the optical cement mode with unpolarized rhombic prism 112, described unpolarized rhombic prism is comprised of two rhombic prisms up and down, the bevel angle of these two rhombic prisms is basically identical, in order to make light path compacter, also comprise the prism 113 that is all-trans, the described prism 113 that is all-trans is arranged between described polarization rhombic prism 111 and the unpolarized rhombic prism 112, after described polarization rhombic prism 111 light splitting, light path S, L is divided into respectively Sx according to vertical X/Y axle, Sy and Lx, two linearly polarized lights of Ly arrive described unpolarized rhombic prism through prism 113 horizontally-guideds that are all-trans again.Its described splicer spare 12 is unpolarized light-combining prisms.
The light path principle of present embodiment is: flashlight S and reference light L light are by after 111 light splitting of polarization rhombic prism, light path S, L is divided into respectively Sx according to vertical X/Y axle, Sy and Lx, two linearly polarized lights of Ly, then again by described unpolarized rhombic prism 112 with Sx, Sy, Lx, Ly four again light splitting of bundle light, every Shu Guang is divided into I by horizontal X/Y axle, the Q two-way, be divided into Sxi, Sxq, Lxi, Lxq, Syi, Syq, Lyi, Lyq eight bundle light signals, the first polarizer 131 in described empty gap is positioned at Sxi, Sxq, Lxi, on the light path of Lxq, make light beam Sxi, Sxq, Lxi, Lxq has same polarization state, light beam Syi, Syq, Lyi, the light path of Lyq is provided with the second polarizer 132, make light beam Syi, Syq, Lyi, Lyq has same polarization state, above-mentioned light beam is more respectively by splicer spare 12 synthetic light beam XI (Sx+Lx), light beam XQ (Sx+jLx), light beam YI (Sy+Ly), light beam YQ (Sy+jLy) exports by port, phase differential 90 degree of S+L and S+jL are regulated by the phase adjusted piece 14 that arranges in the described empty gap, and the lens (not shown) through being arranged on the light path focuses on output again.
In the present embodiment, owing to by the first polarizer 131 light beam Sxi, Sxq, Lxi, Lxq are output as parallel polarization attitude light beam, and second polarizer 132 light beam Syi, Syq, Lyi, Lyq are output as vertical polarization attitude light beam, like this, before splicer 12 closes light, make the polarization direction of two groups of light beams vertical each other, guarantee the consistance of the polarization direction before light beam is interfered, thereby improve the polarization spectro performance of this optical mixer, improve its demodulation ability.
As another embodiment of the present utility model, shown in Fig. 2, Fig. 2 A, compare with a upper embodiment, the first polarizer 231 of this embodiment and the second polarizer 232 can place between polarization rhombic prism 211 and the unpolarized rhombic prism 212, after described polarization rhombic prism 211 light splitting, light path S, L are divided into respectively Sx, Sy and two linearly polarized lights of Lx, Ly according to the X/Y axle, and light beam Sx, Lx are by the first polarizer 231 unified its polarization states; Light beam Sy, Ly are by the second polarizer 232 unified its polarization states, if namely be divided into S polarizing beam Sx, Lx and P polarizing beam Sy, Ly by polarization rhombic prism 211 according to the X/Y axle; The polarizer of the first polarizer 231 for having the S polarization state then, light beam Sx, the Lx that guarantees outgoing only has the light beam of S polarization state, in like manner, and the polarizer of the second polarizer 232 for having the P polarization state, light beam Sy, the Ly that guarantees outgoing only has the light beam of P polarization state.
The light path principle of present embodiment is: flashlight S and reference light L light are by after 211 light splitting of polarization rhombic prism, light path S, L are divided into respectively Sx, Sy and two linearly polarized lights of Lx, Ly according to vertical X/Y axle, and light beam Sx, Lx are by the first polarizer 231 unified its polarization states; Light beam Sy, Ly is after the second polarizer 232 unified its polarization states, then again by described unpolarized rhombic prism 212 with Sx, Sy, Lx, Ly four again light splitting of bundle light, every Shu Guang is divided into I by horizontal X/Y axle, the Q two-way, be divided into Sxi, Sxq, Lxi, Lxq, Syi, Syq, Lyi, Lyq eight bundle light signals, above-mentioned light beam is more respectively by splicer spare 22 synthetic light beam XI (Sx+Lx), light beam XQ (Sx+jLx), light beam YI (Sy+Ly), light beam YQ (Sy+jLy) exports by port, phase differential 90 degree of S+L and S+jL are regulated by the phase adjusted piece 24 that arranges in the described empty gap, and the lens (not shown) through being arranged on the light path focuses on output again.
In the present embodiment, owing to guarantee that by the first polarizer 231 light beam Sx, Lx are output as the S polarizing beam, and second polarizer 232 light beam Sy, Ly are output as the P polarizing beam, like this, before splicer 22 closes light, make the polarization direction of two groups of light beams vertical each other, guarantee the consistance of the polarization direction before light beam is interfered, thereby improve the polarization spectro performance of this optical mixer, improve its demodulation ability.
The utility model utilizes polarizer to guarantee the consistance of the polarization direction before light beam is interfered, thereby improves the polarization spectro performance of this optical mixer, improves its demodulation ability.
Claims (7)
1. optical mixer with high polarization spectro performance, comprise spectrum groupware and splicer spare, wherein, described spectrum groupware is comprised of a polarization rhombic prism and a unpolarized rhombic prism that is arranged on its another side, it is characterized in that: comprise at least one the first polarizer and one second polarizer between described polarization rhombic prism and the splicer, wherein, flashlight S and reference light L light are divided into Sx by spectrum groupware, Sy, Lx, Ly, every Shu Guang is divided into I by horizontal X/Y axle, the Q two-way, be divided into Sxi, Sxq, Lxi, Lxq, Syi, Syq, Lyi, Lyq eight bundle light signals are after same polarizing beam is unified its polarization state by polarizer respectively, by the synthetic light XI (Sx+Lx) of splicer spare, light beam XQ (Sx+jLx), light beam YI (Sy+Ly), light beam YQ (Sy+jLy) exports by port.
2. the optical mixer with high polarization spectro performance according to claim 1 is characterized in that, described polarizer places between polarization rhombic prism and the unpolarized rhombic prism, and light beam Sx, Lx unify its polarization state by the first polarizer; Light beam Sy, Ly unify its polarization state by the second polarizer.
3. the optical mixer with high polarization spectro performance according to claim 1, it is characterized in that, described polarizer places between spectrum groupware and the splicer, the first polarizer is positioned on the light path of Sxi, Sxq, Lxi, Lxq, make light beam Sxi, Sxq, Lxi, Lxq have same polarization state, the second polarizer places on the light path of light beam Syi, Syq, Lyi, Lyq, makes light beam Syi, Syq, Lyi, Lyq have same polarization state.
4. the optical mixer with high polarization spectro performance according to claim 1 is characterized in that, described the first polarizer is mutually vertical with the polarization state of the second polarizer.
5. the optical mixer with high polarization spectro performance according to claim 1, it is characterized in that, described unpolarized rhombic prism is comprised of two rhombic prisms up and down, the bevel angle of two rhombic prisms is consistent, Sx, Sy after the light splitting of polarization rhombic prism, Lx, Ly are divided into I, Q two-way by horizontal X/Y axle, are divided into Sxi, Sxq, Lxi, Lxq, Syi, Syq, Lyi, Lyq eight bundle light signals.
6. the optical mixer with high polarization spectro performance according to claim 1, it is characterized in that, can also comprise the prism that is all-trans, the described prism that is all-trans is arranged between described polarization rhombic prism and the unpolarized rhombic prism, after the light splitting of described polarization rhombic prism, light path S, L are divided into respectively Sx, Sy and two linearly polarized lights of Lx, Ly according to vertical X/Y axle, arrive described unpolarized rhombic prism through the prism horizontally-guided that is all-trans again.
7. the optical mixer with high polarization spectro performance according to claim 1 is characterized in that, described splicer spare is a unpolarized light-combining prism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220463684 CN202870341U (en) | 2012-09-12 | 2012-09-12 | Optical hybrid with high polarization beam-splitting performance |
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| CN 201220463684 CN202870341U (en) | 2012-09-12 | 2012-09-12 | Optical hybrid with high polarization beam-splitting performance |
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| CN202870341U true CN202870341U (en) | 2013-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353520A (en) * | 2015-11-30 | 2016-02-24 | 长春理工大学 | Spatial optical 90-degree mixer with high mixing efficiency |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353520A (en) * | 2015-11-30 | 2016-02-24 | 长春理工大学 | Spatial optical 90-degree mixer with high mixing efficiency |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20190912 |