CN2524249Y - Optical circulator - Google Patents
Optical circulator Download PDFInfo
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- CN2524249Y CN2524249Y CN 02218350 CN02218350U CN2524249Y CN 2524249 Y CN2524249 Y CN 2524249Y CN 02218350 CN02218350 CN 02218350 CN 02218350 U CN02218350 U CN 02218350U CN 2524249 Y CN2524249 Y CN 2524249Y
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Abstract
The utility model discloses an optical circulator comprises a many optical fiber collimators of odd number port, a many optical fiber collimators of even number port, a pair of polarizer, a guarantor eccentric core. The two polarizers are respectively arranged between the multi-fiber collimator with the odd ports and the polarization maintaining core, and between the polarization maintaining core and the multi-fiber collimator with the even ports. The polarization maintaining core can be five-piece type or six-piece type; the polarizer may be composed of a birefringent crystal and a half-wave plate, or may be composed of a Polarizing Beam Splitter (PBS) and a half-wave plate. The structure is adopted to mainly utilize the principle that o light and e light in a beam of linearly polarized light in the polarization-preserving core have different refractive indexes in the same birefringent crystal in different optical axis directions to generate refraction in different directions, so that light beams with specific angles output by the multi-fiber collimator can be well matched with the light beams. The optical circulator is used as a light beam loop component in the optical circulator and is combined with a light splitting and combining polarizer component, so that the optical circulator with a simple structure is realized.
Description
Technical field
This is novel to relate to a kind of optical passive component that is used for optical fiber telecommunications system, refers in particular to a kind of optical circulator.
Background technology
Optical circulator has a wide range of applications at optical communication field.The polarization independent type optical circulator, people such as Matsumoto and Fujii just did a large amount of research as far back as late nineteen seventies to the early 1990s, proposed multiple structure, they all are the characteristics of non-reciprocity that utilize magneto-optical crystal, adopt discrete birefringece crystal of polylith and optically-active element to form.Fig. 1 is a kind of typical structure of optical circulator, is designed by M.Koga.It can be divided into branch actinic light (D﹠amp; M), polarization converted (P﹠amp; O) and light beam loop component (BCC) three parts, wherein divide actinic light and light beam loop component can adopt polarizing beam splitter (PBS) or birefringece crystal, the polarization converted parts often are made up of reciprocity and nonreciprocity optical rotation plate, the reciprocity optical rotation plate can use half-wave plate or natural gyrotropi crystal, and the nonreciprocity optical rotation plate can use the magneto-optical crystal of palpus externally-applied magnetic field or carry the magneto-optical crystal in magnetic field.
In these early stage designs, each input/output port has all adopted a single fiber collimating apparatus, and this makes the oversize of entire device, makes also comparatively inconvenience.Be used for circulator with alternative two the single fiber collimating apparatuss of a double-fiber collimator and then well solved above-mentioned problem.But because input and output two light beams of double-fiber collimator and not parallel, but have a specific angle, therefore all using one in these circulators is the element of parallel beam with this intersection light beam school.In some patents in early days, a roof prism or one and half height prism wedge or wollaston prisms are placed by the A place, position of structure as shown in Figure 1, they all can be used to directional light is produced an angle that mates with double-fiber collimator, two single fiber collimating apparatuss that are arranged in parallel at left end can be replaced with a double-fiber collimator like this.But roof prism used herein and prism wedge, be that two two light beams that are coupled are incided respectively on the different logical light faces, this needs the eye point spacing of two light beams bigger, therefore the birefringece crystal institute palpus longer dimension that uses in the light beam loop component, and very high to light beam incidence point status requirement.As to adopt wollaston prism be the polarization characteristic that has utilized the loop light beam, but amount of crystals is more, and stability is lower.
Summary of the invention
The purpose of this utility model is to be to provide a kind of compact conformation, good stability, the convenient novel optical circulator of regulating.
The following structure of this novel employing realizes above-mentioned purpose, a kind of optical circulator is by an odd number (1,3 ...) multiple optical fiber collimating of port light beam input and output, an even number (2,4 ...) multiple optical fiber collimating of port light beam input and output, a pair of polarizer is protected core shift for one and is formed.Wherein, two polarizers place respectively between odd-numbered port multiple optical fiber collimating and guarantor's core shift and guarantor's core shift and the even port multiple optical fiber collimating.Protecting core shift, can be guarantor's core shift of five chips, also can be guarantor's core shift of six chips; Polarizer can be made up of birefringece crystal and half-wave plate, also can be made up of polarization beam apparatus (PBS) and half-wave plate.
In guarantor's core shift of five chips, comprise three birefringece crystals and two faraday's revolving fragments, wherein, angle is 45 ° between the optical axis of crystal of first birefringece crystal and second birefringece crystal, and angle is 45 ° between the optical axis of crystal of second birefringece crystal and the 3rd birefringece crystal; Two nonreciprocity faraday revolving fragments place respectively between first and second and second and third sheet crystal, and its anglec of rotation is that 45 ° and direction are opposite.Two nonreciprocity faraday revolving fragments can be selected for use and must add the magneto-optical crystal that carries magnetic field, also can select the magneto-optical crystal that carries magnetic field for use.Three birefringece crystals in guarantor's core shift of five chips, the lateral section of logical light face is trapezoidal, and angle theta 1, θ 2, θ 3, θ 4, θ 5, the θ 6 of logical light face and bottom surface can design according to the needs of light path, generally speaking, θ 2=θ 3, θ 4=θ 5.
Guarantor's core shift of another kind of five chips comprises two birefringece crystals, a slice half-wave plate and two faraday's revolving fragments, and wherein, angle is 45 ° between the optical axis of crystal of first birefringece crystal and second birefringece crystal, 45 ° of half-wave plates of a slice; Two nonreciprocity faraday revolving fragments place respectively between first and second crystal and second crystal, the wave plate, and its anglec of rotation is that 45 ° and direction are identical.Two nonreciprocity faraday revolving fragments can be selected for use and must add the magneto-optical crystal that carries magnetic field, also can select the magneto-optical crystal that carries magnetic field for use.Two birefringece crystals in guarantor's core shift of five chips, the lateral section of logical light face is trapezoidal, and θ 1, θ 2, θ 3, θ 4 can design according to the needs of light path, generally speaking, θ 1=θ 4, θ 2=θ 3.
Guarantor's core shift of six chips, comprise four birefringece crystals and two faraday's revolving fragments, wherein, angle is 45 ° between the optical axis of crystal of first birefringece crystal sheet and second birefringece crystal sheet, angle is 45 ° between the optical axis of crystal of second birefringece crystal sheet and the 3rd birefringece crystal sheet, and angle is 45 ° between the optical axis of crystal of the 3rd birefringece crystal sheet and the 4th birefringece crystal sheet; Two nonreciprocity faraday revolving fragments place respectively between first and second and third and fourth sheet crystal, and its anglec of rotation is that 45 ° and direction are opposite.
Adopt said structure to utilize mainly that o light, e light have the principle of different refractivity in the birefringece crystal of the same race of the different optical axis directions of a branch of linearly polarized light in protecting core shift, produce the refraction of different directions, the special angle light beam of multiple optical fiber collimating output can be matched well.It as the light beam loop component in the optical circulator, in conjunction with beam split, close the light polarizer parts, has been realized a kind of optical circulator simple for structure.Simultaneously, owing to need not in light path with compensating plate, its polarization mode dispersion is little, the polarization mode dependent loss is little, is the optical circulator of a kind of big broadband, low Insertion Loss, the modal dispersion of shaking is little, the polarization mode dependent loss is little multiport.
Description of drawings
Fig. 1 is the prior art principle assumption diagram.
Fig. 2 is the utility model structural representation.
Fig. 3 is the structure principle chart of this novel first embodiment.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is through the polarization state synoptic diagram behind each element in the first embodiment optical transmission process.
Fig. 6 is the structure principle chart of this novel second embodiment.
Fig. 7 is the vertical view of Fig. 6.
Fig. 8 is the structure principle chart of this novel the 3rd embodiment.
Fig. 9 is the vertical view of Fig. 8.
Figure 10 is the structure principle chart of this novel the 4th embodiment.
Figure 11 is the vertical view of Figure 10.
Figure 12 is the structure principle chart of this novel the 5th embodiment.
Figure 13 is the vertical view of Figure 12.
Figure 14 is the structure principle chart of this novel the 6th embodiment.
Figure 15 is the vertical view of Figure 14.
Figure 16 is the structure principle chart of this novel the 7th embodiment.
Figure 17 is the vertical view of Figure 16.
Figure 18 is through the polarization state synoptic diagram behind each element in the 7th embodiment optical transmission process.
Figure 19 is that this novel first embodiment encapsulates the back structural representation.
Embodiment
Below, will do further detailed description to the utility model with reference to the accompanying drawings.
As shown in Figure 2, the utility model comprises the multiple optical fiber collimating 12 of 1, one even port light beam of multiple optical fiber collimating input and output of odd-numbered port light beam input and output, and 21,41 and one of a pair of polarizers are protected core shift 31 and formed.Wherein, two polarizers 21,41 place respectively between odd-numbered port multiple optical fiber collimating 1 and guarantor's core shift 31 and guarantor's core shift 31 and the even port multiple optical fiber collimating 12.Protecting core shift 31, can be guarantor's core shift of five chips, also can be guarantor's core shift of six chips; Polarizer 21,41 can be made up of birefringece crystal and half-wave plate, also can be made up of polarization beam apparatus (PBS) and half-wave plate.
Fig. 3, Fig. 4 are the principle assumption diagram of first embodiment, four port optical circulators of the present utility model, and Fig. 3 is a front view, and Fig. 4 is a vertical view.Among the figure: 1 is the double-fiber collimator of odd-numbered port, and 2 is birefringece crystal, and 3 is half-wave plate, 4 is birefringece crystal, 5 is first faraday's revolving fragment, and 6 is magnet ring, and 7 is birefringece crystal, 8 is second faraday's revolving fragment, 9 is birefringece crystal, and 10 is half-wave plate, and 12 is the double-fiber collimator of even port, 11 is birefringece crystal, wherein guarantor's core shift of 4,5,6,7,8,9 compositions, five chips.
Five chips among first embodiment are protected core shift, and angle is 45 ° between the optical axis of crystal of first birefringece crystal and second birefringece crystal, and angle is 45 ° between the optical axis of crystal of second birefringece crystal and the 3rd birefringece crystal; Two nonreciprocity faraday revolving fragments place respectively between first and second and second and third sheet birefringece crystal, and its anglec of rotation is that 45 ° and direction are opposite.Two nonreciprocity faraday revolving fragments can be selected for use and must add the magneto-optical crystal that carries magnetic field, also can select the magneto-optical crystal that carries magnetic field for use.Three birefringece crystals in guarantor's core shift of five chips, the lateral section of logical light face is trapezoidal, and the angle theta 1 of its logical light face and bottom surface, θ 2, θ 3, θ 4, θ 5, θ 6 can design according to the needs of light path, generally speaking, θ 2=θ 3, θ 4=θ 5.Polarizer is made up of birefringece crystal and half-wave plate.The light path of this structure relates to the change of polarization state, and some is inequality with the design of M.Koga shown in Figure 1.When the light of random polarization state during from port one input, port 2 outputs, light 101 is seen port one → port 2 among Fig. 5 through the polarization state behind each elements among Fig. 2; When light during from port 2 input, port 3 outputs, light 201 is seen port 2 → port 3 among Fig. 5 through the polarization state behind each elements among Fig. 3; When light from 3 ports import, during port 4 output, light 301 is seen port 3 → port 4 among Fig. 5 through the polarization state behind each elements among Fig. 3.From the light 101 of the random polarization state of port one input through Walk-off type birefringece crystals 2, (with respect to birefringece crystal 2 is o light to the polarized light of wherein orthogonal two kinds of compositions, e light) horizontal separation comes, 3 is 45 ° of half-wave plates of a slice, to a wherein bunch polarisation (o light) half-twist, this moment, the polarization direction of two bunch polarisations was parallel to the x axle, the birefringent wedge crystal 4 is an e light relatively, is upwards through superrefraction with the transmission direction school under original oblique, when this two-beam process faraday revolving fragment 5, its plane of polarization is rotated 45 ° along the transmission direction inverse clock, because the optical axis of birefringece crystal 7 just in time is 45 ° with respect to the optical axis of birefringece crystal 4, so the e light in birefringece crystal 4 remains e light in birefringece crystal 7, this two-beam is passing through transmission direction school, birefringece crystal 7 back for obliquely.This two-beam is through faraday's revolving fragment 8 time, its plane of polarization arrives birefringece crystal 9 after rotating 45 ° along the transmission direction clockwise, same as above, e light in birefringece crystal 7 remains e light in birefringece crystal 9, and by design to the angle of wedge of birefringece crystal 9, make the transmission direction of the two-beam that comes out from birefringece crystal 9 be refracted as oblique down, by 45 ° of half-wave plates 10, wherein a bunch polarisation half-twist is o light (for a birefringece crystal 11), after Walk-off type birefringece crystal 11 is combined into a branch of light, received by the port 2 of double-fiber collimator 12.
From the light 201 of the random polarization state of port 2 input through Walk-off type birefringece crystals 11, (with respect to birefringece crystal 11 is o light to the polarized light of wherein orthogonal two kinds of compositions, e light) horizontal separation comes, 10 is 45 ° of half-wave plates of a slice, to a wherein bunch polarisation (o light) half-twist, this moment, the polarization direction of two bunch polarisations was parallel to the x axle, birefringent wedge crystal 9 is an e light relatively, is downward through superrefraction with original transmission direction school obliquely, when this two-beam process faraday revolving fragment 8, because magneto-optic has nonreciprocity, its plane of polarization is rotated and light 101 same 45 ° of directions, birefringece crystal 7 is an o light relatively, after reflecting, be an angle and shine faraday's revolving fragment 5 under slightly oblique with light 101, equally, because magneto-optic has nonreciprocity, its plane of polarization is rotated and light 101 same 45 ° of directions, birefringece crystal 4 is an e light relatively, the transmission direction of the two-beam that comes out from birefringece crystal 4 be refracted as oblique down, by 45 ° of half-wave plates 3, wherein a bunch polarisation turns clockwise 90 ° and is o light (for birefringece crystal 2), after Walk-off type birefringece crystal 2 is combined into a branch of light, received by the port 3 of double-fiber collimator 1.
From the light 301 of the random polarization state of port 3 input, the variation of 2 polarization state from the port one to the port of the variation of its polarization state and light 101 is the same, after Walk-off type birefringece crystal 11 is combined into a branch of light, by port 4 receptions of double-fiber collimator 12.
By design to the θ 1 in the birefringece crystal 4,7,9, θ 2, θ 3, θ 4, θ 5, θ 6, make from the emergent light 101 of port one and equate with the coupling angle of double-fiber collimator 1 with the angle of the light 301 that incides port 3, the incident light 301 that incides port 4 is equated with the coupling angle of double-fiber collimator 12 with the angle of the light 201 that incides port 2, like this can fine realization port one → port 2, port 2 → port 3, the loop transfer function of port 3 → port 4 four-port circulators.
Fig. 6, Fig. 7 are the theory structure synoptic diagram of second embodiment, four port optical circulators of the present utility model, and Fig. 6 is a front view, and Fig. 7 is a vertical view.Guarantor's core shift 31 among second embodiment is guarantor's core shifts of five chips, and polarizer the 21, the 41st is made up of polarization beam apparatus (PBS) and half-wave plate.Light path that its light beam is walked and polarization state variation are basic identical with first embodiment's.
Fig. 8, Fig. 9 are the theory structure synoptic diagram of the 3rd embodiment four port optical circulators of the present utility model, and Fig. 8 is a front view, and Fig. 9 is a vertical view.Guarantor's core shift 31 among the 3rd embodiment is guarantor's core shifts of six chips, and polarizer the 21, the 41st is made up of birefringece crystal and half-wave plate.In guarantor's core shift of six chips, angle is 45 ° between the optical axis of crystal of first birefringece crystal sheet and second birefringece crystal sheet, angle is 45 ° between the optical axis of crystal of second birefringece crystal sheet and the 3rd birefringece crystal sheet, and angle is 45 ° between the optical axis of crystal of the 3rd birefringece crystal sheet and the 4th birefringece crystal sheet; Two nonreciprocity faraday revolving fragments place respectively between first and second and third and fourth sheet birefringece crystal, and its anglec of rotation is that 45 ° and direction are opposite.Two nonreciprocity faraday revolving fragments can be selected for use and must add the magneto-optical crystal that carries magnetic field, also can select the magneto-optical crystal that carries magnetic field for use.
Figure 10, Figure 11 are the theory structure synoptic diagram of the 4th embodiment four port optical circulators of the present utility model, and Figure 10 is a front view, and Figure 11 is a vertical view.Guarantor's core shift 31 among the 4th embodiment is guarantor's core shifts of six chips, and polarizer the 21, the 41st is made up of polarization beam apparatus (PBS) and half-wave plate.
Figure 12, Figure 13 are the 5th embodiment three port theory structure synoptic diagram of the present utility model, and Figure 12 is a front view, and Figure 13 is a vertical view.Guarantor's core shift 31 among the 5th embodiment is guarantor's core shifts of five chips, and polarizer the 21, the 41st is made up of birefringece crystal and half-wave plate.Realize port one → port 2, the loop transfer function of port 2 → port 3 three-port circulators.
Figure 14, Figure 15 are the 6th embodiment six port theory structure synoptic diagram of the present utility model, and Figure 14 is a front view, and Figure 15 is a vertical view.Guarantor's core shift 31 among the 6th embodiment is guarantor's core shifts of five chips, and polarizer the 21, the 41st is made up of birefringece crystal and half-wave plate.Realize port one → port 2, port 2 → port 3, port 3 → port 4, port 4 → port 5, the loop transfer function of port 5 → port 6 six port circulators.
Figure 16, Figure 17 are the 7th embodiment four port theory structure synoptic diagram of the present utility model, and Figure 16 is a front view, and Figure 17 is a vertical view, and Figure 18 is through the polarization state synoptic diagram behind each element in the 7th embodiment optical transmission process.Guarantor's core shift 31 among the 7th embodiment is guarantor's core shifts of five chips, and angle is 45 ° between the optical axis of crystal of first birefringece crystal and second birefringece crystal, 45 ° of half-wave plates of a slice; Two nonreciprocity faraday revolving fragments place respectively between first and second birefringece crystal and second birefringece crystal, the half-wave plate, and its anglec of rotation is that 45 ° and direction are identical.Two nonreciprocity faraday revolving fragments can be selected for use and must add the magneto-optical crystal that carries magnetic field, also can select the magneto-optical crystal that carries magnetic field for use.Two birefringece crystals in guarantor's core shift of five chips, the lateral section of logical light face is trapezoidal, and angle theta 1, θ 2, θ 3, the θ 4 of logical light face and bottom surface can design according to the needs of light path, generally speaking, θ 1=θ 4, θ 2=θ 3.Polarizer the 21, the 41st is made up of birefringece crystal and half-wave plate.Realize port one → port 2, port 2 → port 3, the loop transfer function of port 3 → port 4 four-port circulators.Figure 19 shows that the encapsulating structure synoptic diagram of this novel first embodiment, wherein 13 is housing.
Claims (7)
1, a kind of optical circulator, it is characterized in that: comprise an odd number (1,3 ...) multiple optical fiber collimating of port light beam input and output, an even number (2,4 ...) multiple optical fiber collimating of port light beam input and output, a pair of polarizer, protect core shift for one, wherein, two polarizers place respectively between odd-numbered port multiple optical fiber collimating and guarantor's core shift and guarantor's core shift and the even port multiple optical fiber collimating.
2, a kind of optical circulator according to claim 1 is characterized in that guarantor's core shift that described guarantor's core shift can be five chips, also can be guarantor's core shift of six chips.
3, a kind of optical circulator according to claim 2, the guarantor's core shift that it is characterized in that described five chips is made up of three birefringece crystals and two faraday's revolving fragments, wherein, angle is 45 ° between the optical axis of crystal of first birefringece crystal and second birefringece crystal, and angle is 45 ° between the optical axis of crystal of second birefringece crystal and the 3rd birefringece crystal; Two nonreciprocity faraday revolving fragments place respectively between first and second and second and third sheet crystal, its anglec of rotation is that 45 ° and direction are opposite, two nonreciprocity faraday revolving fragments can be selected for use and must add the magneto-optical crystal that carries magnetic field, also can select the magneto-optical crystal that carries magnetic field for use, the lateral section of three logical light faces of birefringece crystal is trapezoidal, logical light face and bottom surface angle theta 1, θ 2, θ 3, θ 4, θ 5, θ 6 can design according to the needs of light path, generally speaking, θ 2=θ 3, θ 4=θ 5.
4, a kind of optical circulator according to claim 2, the guarantor's core shift that it is characterized in that described five chips is made up of two birefringece crystals, a slice half-wave plate and two faraday's revolving fragments, wherein angle is 45 ° between the optical axis of crystal of first birefringece crystal and second birefringece crystal, 45 ° of half-wave plates of a slice; Two nonreciprocity faraday revolving fragments place respectively between first and second birefringece crystal and second birefringece crystal, the half-wave plate, its anglec of rotation is that 45 ° and direction are identical, two nonreciprocity faraday revolving fragments can be selected for use and must add the magneto-optical crystal that carries magnetic field, also can select the magneto-optical crystal that carries magnetic field for use, the lateral section of two logical light faces of birefringece crystal is trapezoidal, logical light face and bottom surface angle theta 1, θ 2, θ 3, θ 4 can design according to the needs of light path, generally speaking, θ 1=θ 4, θ 2=θ 3.
5, a kind of optical circulator according to claim 2, the guarantor's core shift that it is characterized in that described six chips is made up of four birefringece crystals and two faraday's revolving fragments, wherein angle is 45 ° between the optical axis of crystal of first birefringece crystal sheet and second birefringece crystal sheet, angle is 45 ° between the optical axis of crystal of second birefringece crystal sheet and the 3rd birefringece crystal sheet, and angle is 45 ° between the optical axis of crystal of the 3rd birefringece crystal sheet and the 4th birefringece crystal sheet; Two nonreciprocity faraday revolving fragments place respectively between first and second and third and fourth sheet birefringece crystal, its anglec of rotation is that 45 ° and direction are opposite, two nonreciprocity faraday revolving fragments can be selected for use and must add the magneto-optical crystal that carries magnetic field, also can select the magneto-optical crystal that carries magnetic field for use.
6, a kind of optical circulator according to claim 1 is characterized in that described polarizer can be made up of birefringece crystal and half-wave plate.
7, a kind of optical circulator according to claim 1 is characterized in that described polarizer can polarization beam apparatus (PBS) and half-wave plate composition.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02218350 CN2524249Y (en) | 2002-01-12 | 2002-01-12 | Optical circulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 02218350 CN2524249Y (en) | 2002-01-12 | 2002-01-12 | Optical circulator |
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| CN2524249Y true CN2524249Y (en) | 2002-12-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393198A (en) * | 2011-10-20 | 2012-03-28 | 武汉虹拓新技术有限责任公司 | Optical gyroscope |
| CN105807372A (en) * | 2014-12-30 | 2016-07-27 | 福州高意通讯有限公司 | Array optical circulator |
| CN106773149A (en) * | 2017-03-30 | 2017-05-31 | 中山市飞云电子科技有限公司 | A kind of high power yttrium iron garnet Faraday optical rotator |
| CN108710173A (en) * | 2018-07-04 | 2018-10-26 | 中科光电集团有限公司 | A kind of micro loop device structure and its packaging technology |
| CN110208969A (en) * | 2018-02-28 | 2019-09-06 | 福州高意通讯有限公司 | A kind of optical circulator |
-
2002
- 2002-01-12 CN CN 02218350 patent/CN2524249Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393198A (en) * | 2011-10-20 | 2012-03-28 | 武汉虹拓新技术有限责任公司 | Optical gyroscope |
| CN102393198B (en) * | 2011-10-20 | 2015-04-08 | 武汉虹拓新技术有限责任公司 | Optical gyroscope |
| CN105807372A (en) * | 2014-12-30 | 2016-07-27 | 福州高意通讯有限公司 | Array optical circulator |
| CN106773149A (en) * | 2017-03-30 | 2017-05-31 | 中山市飞云电子科技有限公司 | A kind of high power yttrium iron garnet Faraday optical rotator |
| CN110208969A (en) * | 2018-02-28 | 2019-09-06 | 福州高意通讯有限公司 | A kind of optical circulator |
| CN108710173A (en) * | 2018-07-04 | 2018-10-26 | 中科光电集团有限公司 | A kind of micro loop device structure and its packaging technology |
| CN108710173B (en) * | 2018-07-04 | 2024-06-21 | 湖南中科光电有限公司 | Miniature circulator structure and assembly process thereof |
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