CN212623191U - Optical mixer - Google Patents

Abstract

The utility model discloses an optical mixer spare, including the optical fiber head, beam splitting crystal, half-wave plate, collimating lens, filter plate, Faraday optical rotation piece, speculum and the magnetic ring of arranging in proper order, be provided with first optic fibre, second optic fibre and third optic fibre in the optical fiber head, the half-wave plate includes first half-wave plate and second half-wave plate, and first half-wave plate sets up side by side with the second half-wave plate, and first half-wave plate is 45 half-wave plate, and the second half-wave plate is 22.5 half-wave plate. The light input from the first optical fiber enters the third optical fiber through the action of the beam splitter crystal, the half-wave plate and the Faraday optical rotation plate, but the light input from the third optical fiber cannot enter the first optical fiber, so that the purpose of the isolator is achieved; in addition, light input from the first optical fiber can enter the second optical fiber, and light input from the second optical fiber can enter the first optical fiber, so that the WDM function is realized, the whole optical mixer is integrated, the size is greatly reduced, and the miniaturization is realized.

Description

Optical mixer

Technical Field

The utility model relates to a signal transmission equipment field, in particular to optical mixer spare.

Background

In order to achieve the purpose of isolator and detection, the existing photoelectronic device needs to be combined by two or more than two photoelectronic devices, so that the size is larger, and the miniaturization requirement is not easy to meet.

Disclosure of Invention

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an optical mixing device can integrate WDM function and isolator function, makes the structure compacter miniaturization.

According to the utility model discloses an optical mixer spare of first aspect embodiment, including the optic fibre head, beam splitting crystal, half-wave plate, collimating lens, filter plate, Faraday optical rotation piece, speculum and the magnetic ring of arranging in proper order, be provided with first optic fibre, second optic fibre and third optic fibre in the optic fibre head, the half-wave plate includes first half-wave plate and second half-wave plate, first half-wave plate with the second half-wave plate sets up side by side, first half-wave plate is 45 half-wave plate, the second half-wave plate is 22.5 half-wave plate.

According to the utility model discloses optical mixer spare has following beneficial effect at least: the light input from the first optical fiber enters the third optical fiber through the action of the beam splitter crystal, the half-wave plate and the Faraday optical rotation plate, but the light input from the third optical fiber cannot enter the first optical fiber, so that the purpose of the isolator is achieved; in addition, light input from the first optical fiber can enter the second optical fiber, and light input from the second optical fiber can enter the first optical fiber, so that the WDM function is realized, the whole optical mixer is integrated, the size is greatly reduced, and the miniaturization is realized.

According to some embodiments of the invention, in cross-section, the first optical fiber, the second optical fiber and the third optical fiber form an equilateral triangle, the first optical fiber being disposed below the second optical fiber and the third optical fiber.

According to some embodiments of the utility model, the optical fiber head the beam splitting crystal first half wave plate the second half wave plate collimating lens the filter plate faraday optical rotation piece the speculum reaches the outside parcel of magnetic ring has total encapsulation pipe. All parts are encapsulated and protected by the main encapsulation tube.

According to some embodiments of the utility model, the optical fiber head the beam splitting crystal first half-wave plate reaches the outside parcel of second half-wave plate has the tail optical fiber glass pipe. And the optical fiber head, the light splitting crystal and the half-wave plate are integrally packaged through a tail optical fiber glass tube.

According to some embodiments of the invention, the outside parcel of collimating lens has lens glass pipe. And (5) packaging the straight lens by using a transparent glass tube.

According to some embodiments of the invention, the first optical fiber, the second optical fiber and the third optical fiber are arranged in parallel.

According to the utility model discloses a some embodiments, first optic fibre second optic fibre reaches third optic fibre is from last down setting gradually, the beam split crystal with be 45 contained angles between the axis of optical fiber head.

According to some embodiments of the utility model, the second optic fibre with the axis coincidence of optical fiber head, first optic fibre with third optic fibre is arranged respectively the top and the below of second optic fibre.

According to some embodiments of the invention, the first optical fiber, the second optical fiber and the third optical fiber are arranged equidistantly.

According to some embodiments of the utility model, the optical fiber head the beam splitting crystal first half-wave plate reaches the second half-wave plate with the adhesion of tail optical fiber glass pipe. The components in the tail fiber glass tube can be fixed conveniently.

According to some embodiments of the invention, the collimating lens is adhered to the lens glass tube. The collimator lens is convenient to fix.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of an installation structure of an embodiment of the present invention;

fig. 2 is a diagram illustrating an operation state of an optical hybrid device according to an embodiment of the present invention;

fig. 3 is another operation state diagram of the optical hybrid device according to the embodiment of the present invention;

fig. 4 is another operation state diagram of the optical hybrid device according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of an optical fiber head according to an embodiment of the present invention.

Reference numerals

100. An optical fiber head; 200. a spectroscopic crystal; 400. a collimating lens; 500. a filter plate; 600. a Faraday rotator; 700. a mirror; 800. a magnetic ring; 900. a total package tube; 110. a first optical fiber; 120. a second optical fiber; 130. a third optical fiber; 140. a pigtail glass tube; 310. a first half wave plate; 320. a second half-wave plate; 410. a lens glass tube.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, in an embodiment, an optical hybrid device includes an optical fiber head 100, a beam splitting crystal 200, a half-wave plate, a collimating lens 400, a filter 500, a faraday optical rotation plate 600, a mirror 700, and a magnetic ring 800, which are sequentially arranged, a first optical fiber 110, a second optical fiber 120, and a third optical fiber 130 are sequentially disposed in the optical fiber head 100 from top to bottom, the half-wave plate includes a first half-wave plate 310 and a second half-wave plate 320, the first half-wave plate 310 and the second half-wave plate 320 are disposed side by side, the first half-wave plate 310 is a 45 ° half-wave plate and is disposed on an optical path of the second optical fiber 120, and the second half-wave plate 320 is a 22.5 ° half-wave plate and is disposed on an optical path of the third optical fiber.

The light input from the first optical fiber 110 enters the third optical fiber 130 through the action of the beam splitter crystal 200, the half-wave plate and the faraday optical rotation plate 600, while the light input from the third optical fiber 130 cannot enter the first optical fiber 110, so as to achieve the purpose of an isolator; in addition, the light input from the first optical fiber 110 can enter the second optical fiber 120, and the light input from the second optical fiber 120 can enter the first optical fiber 110, so that the WDM function is realized, the whole optical mixer is integrated, the volume is greatly reduced, and the miniaturization is realized.

Specifically, as shown in fig. 2, in one mode of use, the light beam L11 entering from the first optical fiber 110 is a mixed light having wavelengths a and b, enters the spectroscopic crystal 200, and is split into two light beams having vibration directions perpendicular to each other, i.e., a light beam L12 and a light beam L13, respectively. The light beam L11 is divided into two light beams L12 and L13 by the light splitting crystal 200, wherein one light beam is ordinary light and has a vibration direction perpendicular to the optical axis plane, the other light beam is extraordinary light and has a vibration direction parallel to the optical axis plane, and both the two light beams L12 and L13 are polarized light, i.e., the polarization state of the light beams is fixed. The two polarized lights L12 and L13 are both incident on the filter 500 after passing through the collimating lens 400, wherein the filter 500 reflects the light with the wavelength a and transmits the light with the wavelength b, so the light with the wavelength a is reflected by the filter 500 to form the light beams L14 and L15, and the light beam with the wavelength b is transmitted into the faraday rotation plate 600 through the filter 500. The reflected light beams L14 and L15 pass through the collimating lens 400 again and enter the first half wave plate 310, and then enter the spectroscopic crystal 200, and the first half wave plate 310 is a 45 ° half wave plate for the wavelength a, so the light beams L14 and L15 rotate 90 ° at the same time, at this time, the original ordinary ray becomes an extraordinary ray, and the original extraordinary ray becomes an ordinary ray, so after entering the spectroscopic crystal 200 again, the two reflected light beams L14 and L15 are recombined into one light beam L16, and then introduced into the second optical fiber 120. The light beam having the wavelength b is transmitted into the faraday rotator 600 and then enters the mirror 700, the light beam forms reflected light beams L17 and L18 by the mirror 700, and the faraday rotator 600 is a 22.5 ° rotator and passes through the faraday rotator 600 twice by the magnetic ring 800, so that the vibration directions of L17 and L18 are rotated by 45 ° in common. The reflected light beams L17 and L18 again pass through the collimating lens 400 and enter the second half-wave plate 320, and then enter the spectroscopic crystal 200, and the second half-wave plate 320 is a 22.5 ° half-wave plate for the wavelength b, and at this time, the polarization states of the light beams L17 and L18 are rotated again by 45 °, and the rotation direction coincides with the rotation direction of the faraday rotator 600, and therefore, the vibration directions are both rotated by 90 ° compared with the initial vibration direction, but the vibration directions are still perpendicular to each other. Since the original ordinary ray becomes an extraordinary ray and the original extraordinary ray becomes an ordinary ray, the ordinary ray enters the spectroscopic crystal 200 again, and then the two reflected light beams L17 and L18 are recombined into one light beam L19 and introduced into the third optical fiber 130.

In another usage, as shown in fig. 3, if the optical signal is transmitted from the second direction, i.e. the light beam L21 enters from the second optical fiber 120, and passes through the light splitting crystal 200, and is split into two light beams L22 and L23 with mutually perpendicular vibration directions, one of the light beams is the ordinary light, and the other light beam is the extraordinary light. After passing through the spectroscopic crystal 200, the two beams L22 and L23 both rotate 90 ° in the vibration direction under the action of the first half wave plate 310, and at this time, the original ordinary ray becomes extraordinary ray, and the original extraordinary ray becomes ordinary ray. Then, the two light beams L22 and L23 enter the collimator lens 400, and then enter the filter 500, and are reflected to form light beams L24 and L25. The reflected beams L24 and L25 enter the collimating lens 400 again and then enter the light splitting crystal 200, and since the original ordinary rays of the light beams L24 and L25 are changed into extraordinary rays and the original extraordinary rays are changed into ordinary rays, the light beams L24 and L25 are combined into a light beam L26 after passing through the light splitting crystal 200, and then the light beam L26 enters the first optical fiber 110 to be transmitted continuously.

In contrast, in one mode of use, as shown in fig. 4, if the light beam L31 enters from the second optical fiber 120 and passes through the dichroic crystal 200, the light beam L31 forms light beams L32 and L33 with mutually perpendicular polarization states and enters the second half-wave plate 320, and the polarization directions of the light beams L32 and L33 are both rotated by 45 °. Then, the light beam enters the collimating lens 400, passes through the filter 500, is transmitted into the faraday rotation plate 600, is reflected by the mirror 700 to form reflected light beams L34 and L35, and is transmitted to form a light beam L36. At this time, the light beams pass through the faraday rotator 600 twice, so the polarization states of the reflected light beams L34 and L35 are rotated by 45 ° again relative to the incident light beams L32 and L33, but the rotation direction at this time is opposite to the rotation direction of the half-wave plate, so when the light beams L34 and L35 enter the spectroscopic crystal 200, the light beams cannot be combined, that is, cannot enter the first optical fiber 110, and optical isolation is achieved.

In some embodiments, the optical fiber head 100, the light splitting crystal 200, the first half-wave plate 310, the second half-wave plate 320, the collimating lens 400, the filter 500, the faraday rotation plate 600, the reflector 700, and the magnetic ring 800 are externally wrapped with a total packaging tube 900. All components are encapsulated and protected by the overall encapsulation tube 900.

In some embodiments, the fiber head 100, the beam splitting crystal 200, the first half-wave plate 310 and the second half-wave plate 320 are externally wrapped with a pigtail glass tube 140. The fiber head 100, the splitting crystal 200 and the half-wave plate are integrally packaged through the pigtail glass tube 140.

In some embodiments, the collimating lens 400 is externally wrapped with a lens glass tube 410. The straight lens 400 is encapsulated with a transparent glass tube.

In some embodiments, the first optical fiber 110, the second optical fiber 120, and the third optical fiber 130 are disposed in parallel.

In some embodiments, the beam splitting crystal 200 is angled at 45 ° from the central axis of the fiber tip 100.

In some embodiments, the second optical fiber 120 coincides with the central axis of the fiber tip 100, and the first optical fiber 110 and the third optical fiber 130 are disposed above and below the second optical fiber 120, respectively.

In some embodiments, the first optical fiber 110, the second optical fiber 120, and the third optical fiber 130 are disposed equidistant.

In some embodiments, the fiber head 100, the beam splitting crystal 200, the first half-wave plate 310, and the second half-wave plate 320 are bonded to the pigtail glass tube 140. Facilitating the fixing of the components within the pigtail glass tube 140. The collimating lens 400 is bonded to the lens glass tube 410. It is convenient to fix the collimator lens 400.

Referring to fig. 5, in another specific embodiment, in cross section, the first optical fiber 110, the second optical fiber 120, and the third optical fiber 130 form an equilateral triangle, and the first optical fiber 110 is disposed below the second optical fiber 120 and the third optical fiber 130. This arrangement also enables the technical effect that the optical mixer device of the present invention can achieve.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. The optical mixer is characterized by comprising an optical fiber head, a light splitting crystal, a half-wave plate, a collimating lens, a filter plate, a Faraday optical rotation plate, a reflector and a magnetic ring which are sequentially arranged, wherein a first optical fiber, a second optical fiber and a third optical fiber are arranged in the optical fiber head, the half-wave plate comprises a first half-wave plate and a second half-wave plate, the first half-wave plate and the second half-wave plate are arranged side by side, the first half-wave plate is a 45-degree half-wave plate, and the second half-wave plate is a 22.5-degree half-wave plate.

2. An optical mixer device according to claim 1, wherein, in cross-section, the first, second and third optical fibers form an equilateral triangle, the first optical fiber being arranged below the second and third optical fibers.

3. The optical mixer device according to claim 1, wherein the fiber head, the splitting crystal, the first half-wave plate, the second half-wave plate, the collimating lens, the filter, the faraday optical rotation plate, the reflector, and the magnetic ring are externally wrapped with a main encapsulation tube.

4. An optical mixer device according to claim 1, wherein the fiber head, the splitting crystal, the first half-wave plate and the second half-wave plate are externally wrapped with pigtail glass tubes.

5. An optical mixer device according to claim 1, wherein the collimating lens is externally wrapped with a lens glass tube.

6. The optical mixer device according to claim 1, wherein the first, second and third optical fibers are arranged in parallel.

7. The optical mixer device according to claim 1, wherein the first optical fiber, the second optical fiber and the third optical fiber are sequentially disposed from top to bottom, and an included angle of 45 ° is formed between the spectroscopic crystal and the central axis of the optical fiber head.

8. An optical mixer device according to claim 7, wherein the second optical fiber coincides with a central axis of the optical fiber head, and the first optical fiber and the third optical fiber are arranged above and below the second optical fiber, respectively.

9. An optical mixer device according to claim 6 or 8, wherein the first, second and third optical fibers are arranged equidistantly.

10. The optical mixer device according to claim 4, wherein the fiber head, the splitting crystal, the first half-wave plate and the second half-wave plate are bonded to the pigtail glass tube.

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