CN211856985U

CN211856985U - Multichannel array optical isolator

Info

Publication number: CN211856985U
Application number: CN202020770257.6U
Authority: CN
Inventors: 范臣臣; 胡义华; 林耀忠; 李京辉
Original assignee: Auxora Shenzhen Inc
Current assignee: Auxora Shenzhen Inc
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2020-11-03
Anticipated expiration: 2030-05-12

Abstract

The utility model provides a multichannel array optical isolator, including outer glass pipe, insert the incident fiber collimator of glass pipe one end, insert the emergent fiber collimator of the glass pipe other end and set up the isolator core that is used for transmitting incident fiber collimator's optical signal to emergent fiber collimator in outer glass pipe, every fiber collimator is including the sleeve pipe that inserts glass pipe, insert the lens of sleeve pipe one end, insert the capillary of the sleeve pipe other end and insert the multicore tail optical fiber with the butt joint of lens in the capillary, be equipped with in the capillary and be used for supplying multicore tail optical fiber male through-hole, every optic fibre of multicore tail optical fiber is arranged side by side in the through-hole and is docked with lens. Compared with the prior art, the multichannel array optical isolator arranges the optical fibers in parallel into the capillary to position the optical fibers, so that the optical coupling and distribution are accurate, the optical signals are accurate, the size of the optical isolator is reduced, and the application range is enlarged.

Description

Multichannel array optical isolator

Technical Field

The utility model relates to a fiber network transmission field, especially a multichannel array optical isolator.

Background

As the development of optical fiber communication technology has increased more rapidly, more speed and higher integration of optical systems has become more important.

The optical isolator is a passive device which allows light to pass through in one direction and prevents the light from passing through in the opposite direction, the function is to limit the direction of the light, the light can be transmitted only in a single direction, the working principle is based on the non-reciprocity of Faraday rotation, and the light reflected by the optical fiber echo can be well isolated by the optical isolator. The optical isolator mainly utilizes the faraday effect of the magneto-optical crystal. The characteristics of the optical isolator are: the forward insertion loss is low, the reverse isolation degree is high, and the return loss is high.

At present, the optical module has higher and higher speed, and the coupling and distribution of array light are required, and the requirement on an array laser is higher and higher. When a multi-core optical fiber exists in the existing optical isolator, the position of each core optical fiber can move in use, so that the aggregation and distribution of light can deviate, and the optical signal is not good. And the existing isolator has larger volume and is not convenient to use due to the multi-core.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a multichannel array optical isolator fixes a position each core optic fibre for the polymerization and the distribution of light are accurate, and light signal is accurate, and reduce the optical isolator volume, and application range increases.

The utility model adopts the technical proposal that:

the utility model provides a multichannel array optical isolator, includes outer glass pipe, inserts the incident fiber collimator of glass pipe one end, inserts the emergent fiber collimator of the glass pipe other end and sets up the isolator core that is used for transmitting the light signal of incident fiber collimator to emergent fiber collimator in outer glass pipe, its characterized in that: each optical fiber collimator comprises a sleeve inserted into the glass tube, a lens inserted into one end of the sleeve, a capillary tube inserted into the other end of the sleeve, and a multi-core tail fiber inserted into the capillary tube and butted with the lens, wherein a through hole for the multi-core tail fiber to be inserted is formed in the capillary tube, and each optical fiber of the multi-core tail fiber is arranged in the through hole in parallel and butted with the lens.

Preferably, each optical fiber of the multi-core pigtail is arranged side by side in the through hole at equal intervals.

Preferably, the through hole of the capillary is a square hole.

More preferably, the size of the square hole is 0.63 × 0.25mm.

More preferably, each optical fiber in the through hole is fixed with glue.

More preferably, the end surface of the capillary corresponding to the lens is an inclined surface.

More preferably, the inclined end surface of the capillary tube corresponding to the lens forms an angle of 8 ° with the vertical surface.

More preferably, the isolator core is disposed in the magnetic ring, the light exit end of the lens of the incident optical fiber collimator is inserted into one end of the magnetic ring, a semicircular glass sheet is disposed in the other end of the magnetic ring, and the isolator core includes a first birefringent crystal sheet, a faraday sheet, and a second birefringent crystal sheet which are disposed on the semicircular glass sheet and stacked in sequence along the radial direction.

Preferably, the size of the separator core is 0.7 × 1.0 mm.

Preferably, the multi-core pigtail is a 4-core pigtail.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a multichannel array optical isolator arranges each optic fibre side by side and puts into in the capillary in order to fix a position each optic fibre for the polymerization and the distribution of light are accurate, and light signal is accurate, and reduce optical isolator volume, satisfy the function of light signal reverse isolation in the limited space of integrated optics, effectively protect high-speed optical communication signal passback noise; meanwhile, the multi-channel isolator has more advantages in cost, and raw materials such as lenses, glass tubes and the like are shared.

Drawings

Fig. 1 is a schematic diagram of a multi-channel array optical isolator provided by the present invention;

fig. 2 is a cross-sectional view of a multi-channel array optical isolator provided by the present invention;

fig. 3 is an exploded view of an incident fiber collimator in a multi-channel array optical isolator according to the present invention;

fig. 4 is a schematic diagram of a capillary tube in a multi-channel array optical isolator provided by the present invention;

fig. 5 is an exploded view of an isolator core in a multi-channel array optical isolator according to the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 to 5 illustrate a preferred embodiment of a multi-channel array optical isolator according to the present invention. As shown in fig. 1 to 4, the multi-channel array optical isolator includes an outer glass tube 10, an incident fiber collimator 20 inserted into one end of the glass tube, an exit fiber collimator 30 inserted into the other end of the glass tube, and an isolator core 40 disposed in the outer glass tube for transmitting an optical signal of the incident fiber collimator to the exit fiber collimator, such that an optical signal entering from the incident fiber collimator 20 is transmitted to a corresponding exit fiber collimator 30 through the isolator core 40 to be emitted, and reverse transmission of the optical signal of the incident fiber collimator 20 is suppressed.

As shown in fig. 2 and 3, the structure of the incident fiber collimator 20 is the same as that of the exit fiber collimator 30, and the incident fiber collimator 20 is taken as an example for explanation, where the incident fiber collimator 20 includes a sleeve 21 inserted into a glass tube, a lens 22 inserted into one end of the sleeve, a capillary 23 inserted into the other end of the sleeve, and a multi-core pigtail 24 inserted into the capillary and butted with the lens, a through hole 231 for inserting the multi-core pigtail is provided in the capillary 23, each optical fiber 241 of the multi-core pigtail 24 is arranged side by side in the through hole 231 and butted with the lens 22, and each optical fiber 241 of the multi-core pigtail 24 is positioned and arranged in the through hole 231, so as to prevent the optical fibers from shifting and causing inaccurate coupling. Preferably, each optical fiber of the multi-core pigtail 24 is arranged side by side in the through hole 231 at equal intervals, so that each optical fiber in the incident optical fiber collimator 20 corresponds to each optical fiber in the emergent optical fiber collimator.

As shown in fig. 4, the end surface of the capillary 23 corresponding to the lens is an inclined surface 232, and the through hole 231 of the capillary 23 is a square hole, and the size of the square hole is preferably 0.63 × 0.25mm. Preferably, the multi-core pigtail 24 has 4 optical fibers, and each optical fiber 241 in the through hole is fixed by glue.

As shown in fig. 5, the isolator core 40 is disposed in the magnetic ring 50, the light exit end of the lens of the incident optical fiber collimator is inserted into one end of the magnetic ring, a semicircular glass plate 51 is disposed in the other end of the magnetic ring 50, the isolator core 40 includes a first birefringent crystal plate 41, a faraday plate 42 and a second birefringent crystal plate 43 which are disposed on the semicircular glass plate and stacked in sequence along the radial direction, the lens of the emergent optical fiber collimator 30 is disposed outside the magnetic ring 50, the isolator core 40 is used to transmit the optical signal emitted from the incident optical fiber collimator 20 to the corresponding emergent optical fiber collimator 30, and to suppress the reverse transmission of the optical signal; the input multichannel array parallel light is decomposed into 2 beams of polarized light with mutually perpendicular polarization states after passing through the first birefringent crystal plate 41, the two beams of polarized light sequentially enter the Faraday plate 42 and then rotate clockwise in the polarization direction by 45 degrees, and then the two beams of light with different polarization directions are combined together after passing through the second birefringent crystal 43 and then are coupled and received by the light-emitting end multichannel collimator.

In a preferred embodiment, the length and width of each sheet material in the isolator core are 0.7 × 1.0mm, and the inner diameter of the magnetic ring where the isolator core is located is 1.81mm, so that the isolator core can be hung on the lens to be coaxially fixed.

To sum up, the technical scheme of the utility model can be fully effectual the above-mentioned utility model purpose of realization, just the utility model discloses a structure and functional principle all obtain abundant verification in the embodiment, can reach anticipated efficiency and purpose, do not deviating from the utility model discloses a under the prerequisite of principle and essence, can make multiple change or modification to the embodiment of utility model. Therefore, the present invention includes all the alternative contents within the scope mentioned in the claims, and all the equivalent changes made within the claims of the present invention are included in the claims of the present application.

Claims

1. The utility model provides a multichannel array optical isolator, includes outer glass pipe, inserts the incident fiber collimator of glass pipe one end, inserts the emergent fiber collimator of the glass pipe other end and sets up the isolator core that is used for transmitting the light signal of incident fiber collimator to emergent fiber collimator in outer glass pipe, its characterized in that: each optical fiber collimator comprises a sleeve inserted into the glass tube, a lens inserted into one end of the sleeve, a capillary tube inserted into the other end of the sleeve, and a multi-core tail fiber inserted into the capillary tube and butted with the lens, wherein a through hole for the multi-core tail fiber to be inserted is formed in the capillary tube, and each optical fiber of the multi-core tail fiber is arranged in the through hole in parallel and butted with the lens.

2. The multi-channel array optical isolator of claim 1, wherein: each optical fiber of the multi-core tail fiber is arranged in the through hole in parallel at equal intervals.

3. The multi-channel array optical isolator of claim 1, wherein: the through hole of the capillary tube is a square hole.

4. The multi-channel array optical isolator of claim 3, wherein: the size of the square hole is 0.63 x0.25mm.

5. The multi-channel array optical isolator of claim 1, wherein: and each optical fiber in the through hole is fixed by glue.

6. The multi-channel array optical isolator of claim 1, wherein: the end face of the capillary corresponding to the lens is an inclined face.

7. The multi-channel array optical isolator of claim 1, wherein: the included angle between the inclined end face and the vertical face of the capillary tube corresponding to the lens is 8 degrees.

8. The multi-channel array optical isolator of claim 1, wherein: the isolator core is arranged in the magnetic ring, the light outlet end of the lens of the incident optical fiber collimator is inserted into one end of the magnetic ring, a semicircular glass sheet is arranged in the other end of the magnetic ring, and the isolator core comprises a first birefringent crystal sheet, a Faraday sheet and a second birefringent crystal sheet which are arranged on the semicircular glass sheet and are sequentially stacked along the radial direction.

9. The multi-channel array optical isolator of claim 1, wherein: the size of the separator core was 0.7 × 1.0 mm.

10. The multi-channel array optical isolator of claim 1, wherein: the multi-core tail fiber is a 4-core tail fiber.