CN210347986U - Optical device - Google Patents

Abstract

The utility model relates to an optical communication field, concretely relates to optical device, including first collimator and second collimator, and locate the optical function subassembly between first collimator and the second collimator, still including the packaging part that is used for the encapsulation to connect first collimator and second collimator, the packaging part is including the first slotted hole that is used for installing first collimator, a second slotted hole for installing the second collimator, and locate the third slotted hole that is used for installing optical function subassembly between first slotted hole and the second slotted hole, first slotted hole, second slotted hole and third slotted hole are mutually linked together, and the axis of first slotted hole and second slotted hole sets up in a wrong way. The utility model discloses can realize shifting the debugging between two collimators to the inside debugging of first collimator and second collimator, reduce the debugging displacement volume of device greatly, reduce the holistic size of optical device, reject the redundant space of old design, overall structure is compact, realizes optical device's miniaturized design.

Description

Optical device

Technical Field

The utility model relates to an optical communication field, concretely relates to optical device.

Background

The optical fiber communication system generally comprises various optical components, and relates to a wavelength division multiplexer, an isolator, a circulator, a light splitting detector, a polarization maintaining device and the like. Generally, a module or system needs a large number of optical devices, which are stacked together and occupy a large space, and the miniaturization degree of the devices directly determines the external volume of the whole module or system.

As the demand for miniaturization of modules or systems increases, so does the demand for miniaturization of optical devices, particularly the outer diameter of the optical devices. At the same time, there is a need to maintain structural stability and optimum parametric performance of the optical device, especially long-term reliability and temperature performance.

In the existing optical device, during packaging, two collimators are directly coupled with parameters, and then sleeved into a circular tube for curing, so that great debugging displacement is needed, and the optical device is difficult to further miniaturize.

The packaging of existing optical devices is yet to be further optimized.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide an optical device, overcome current optical device and need very big debugging displacement volume, further miniaturized problem that the difficulty is big.

The utility model provides a technical scheme that its technical problem adopted is: the optical device comprises a first collimator, a second collimator, an optical functional component arranged between the first collimator and the second collimator, and a packaging part used for packaging and connecting the first collimator and the second collimator, wherein the packaging part comprises a first slotted hole used for installing the first collimator, a second slotted hole used for installing the second collimator, and a third slotted hole arranged between the first slotted hole and the second slotted hole and used for installing the optical functional component, the first slotted hole, the second slotted hole and the third slotted hole are communicated with each other, and the axes of the first slotted hole and the second slotted hole are arranged in a staggered mode.

The utility model discloses a further preferred scheme is: the first collimator comprises a first optical fiber head, a first lens structure arranged in a first groove hole, and a first sleeve member sleeved at the joint of the first optical fiber head and the first lens structure; the second collimator comprises a second optical fiber head, a second lens structure arranged in a second slotted hole, and a second sleeve sleeved at the joint of the second optical fiber head and the second lens structure.

The utility model discloses a further preferred scheme is: the optical device further comprises a third sleeve piece which is arranged between the first lens structure and the packaging piece and partially protrudes out of the first slotted hole, and a fourth sleeve piece which is arranged between the second lens structure and the packaging piece and partially protrudes out of the second slotted hole.

The utility model discloses a further preferred scheme is: and the dihedral angle between the end face of the third set close to the optical functional component and the cross section of the third set is 0-8 degrees.

The utility model discloses a further preferred scheme is: the included angle between the end face of the first lens structure and the cross section of the first lens structure is 4-12 degrees, and the included angle between the end face of the second lens structure and the cross section of the second lens structure is 4-12 degrees.

The utility model discloses a further preferred scheme is: the first optical fiber head comprises a first capillary tube, a first optical fiber and a second optical fiber, wherein the first optical fiber and the second optical fiber are arranged in the first capillary tube, and the distance between the circle center connecting line of the first optical fiber and the second optical fiber and the axis of the first capillary tube is 0-0.25 mm.

The utility model discloses a further preferred scheme is: the included angle between the end face of the first optical fiber head and the cross section of the first optical fiber head is 4-12 degrees, and the included angle between the end face of the second optical fiber head and the cross section of the second optical fiber head is 4-12 degrees.

The utility model discloses a further preferred scheme is: the optical device further comprises a first outer sealing piece sleeved on the third sleeve piece and connected with one end of the packaging piece, and a second outer sealing piece sleeved on the fourth sleeve piece and connected with the other end of the packaging piece.

The utility model discloses a further preferred scheme is: the first slotted hole, the second slotted hole and the third slotted hole are all cylindrical slotted holes, and the diameters of the first slotted hole and the second slotted hole are larger than that of the third slotted hole.

The utility model discloses a further preferred scheme is: the optical functional component is one of a light filter device, a light splitter device and a Faraday optical rotation device.

The beneficial effects of the utility model reside in that, through setting up the packaging part, the first slotted hole, the second slotted hole and the third slotted hole of packaging part are mutually linked, and the axis of first slotted hole and second slotted hole sets up by mistake, have certain interval between the axis of the two, compensate the dislocation volume above the optical coupling, shift the debugging between two collimators to the debugging inside of first collimator and second collimator, greatly reduce the debugging displacement volume of device, reduce the holistic size of optical device, reject the redundant space of old design, overall structure is compact, realize the miniaturized design of optical device; and the joint of the first optical fiber head and the first lens structure in the first collimator is sleeved and packaged by using a first sleeve, and the joint of the second optical fiber head and the second lens structure in the second collimator is sleeved and packaged by using a second sleeve, so that the outer diameter size of the optical device is further reduced.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural diagram of an optical device (optical functional component is a filter device) according to the present invention;

fig. 2 is a schematic structural diagram of an optical device (the optical functional component is a faraday optical device) according to the present invention;

fig. 3 is a schematic structural diagram of the package of the present invention applied to a spectroscopic probe device;

fig. 4 is a schematic structural diagram of the package of the present invention.

Detailed Description

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

As shown in fig. 1, the present invention provides a preferred embodiment of an optical device.

An optical device comprises a first collimator, a second collimator, an optical functional assembly arranged between the first collimator and the second collimator, and a packaging piece 40 used for packaging and connecting the first collimator and the second collimator, wherein the packaging piece 40 comprises a first slotted hole 41 used for installing the first collimator, a second slotted hole 42 used for installing the second collimator, and a third slotted hole 43 arranged between the first slotted hole 41 and the second slotted hole 42 and used for installing the optical functional assembly, the first slotted hole 41, the second slotted hole 42 and the third slotted hole 43 are communicated with each other, and the axes of the first slotted hole 41 and the second slotted hole 42 are arranged in a staggered mode.

Through setting up packaging part 40, the first slotted hole 41 of packaging part 40, second slotted hole 42 and third slotted hole 43 communicate each other, and the axis of first slotted hole 41 and second slotted hole 42 sets up by mistake, certain interval has between the axis of the two, the dislocation volume above the compensation optical coupling, with current through directly coupling good parameter with two collimators, the mode of emboliaing the pipe is compared, transfer the debugging inside first collimator and the second collimator between the two collimators, reduce the debugging displacement volume of device greatly, reduce the holistic size of optical device, the redundant space of old design has been got rid of, overall structure is compact, realize optical device's miniaturized design.

The first slot 41, the second slot 42 and the third slot 43 are all cylindrical slots, and the diameters of the first slot 41 and the second slot 42 are all larger than the diameter of the third slot 43. The optical functional assembly is mounted in the third slot 43 near the center of the package 40.

And, referring to fig. 4, the axes of the first slot 41 and the second slot 42 are arranged in a staggered manner, which means that the axes of the first slot 41 and the second slot 42 are not on the same straight line. The two axes are at a distance.

And the amount of misalignment over the optical coupling is due primarily to factors such as the various wedge surfaces and the input light not generally being on the central axis.

In this embodiment, the first collimator includes a first optical fiber head 11, a first lens structure 12 installed in the first slot 41, and a first sleeve 13 sleeved at a connection position of the first optical fiber head 11 and the first lens structure 12; the second collimator comprises a second optical fiber head 21, a second lens structure 22 installed in the second slot 42, and a second sleeve 23 sleeved at the joint of the second optical fiber head 21 and the second lens structure 22. After the relative position debugging step of the first optical fiber head 11 and the first lens structure 12 is completed, the first sleeve 13 is sleeved at the joint of the first optical fiber head and the first lens structure to realize connection and encapsulation, and similarly, after the relative position debugging step of the second optical fiber head 21 and the second lens structure 22 is completed, the second sleeve 23 is sleeved at the joint of the first optical fiber head and the second lens structure to realize connection and encapsulation.

The prior art has two schemes for the encapsulation connection of the optical fiber head and the lens structure, wherein the first scheme is that the end surfaces of two sleeves which are respectively sleeved with the optical fiber head and the lens structure are butted, adhered and fixed to realize the encapsulation connection of the optical fiber head and the lens structure, and the stability of the adhesion structure is ensured by the thicker thickness; the second scheme is that the optical fiber head and the lens structure are connected and fixed through wrapping glue in a packaging manner, the optical fiber head needs to be sleeved with a glass tube and then sleeved with an outer packaging part, and the outer packaging part is prevented from contacting with the glue, and the optical fiber head cannot be further compressed due to the air gap. The utility model discloses a junction of optical fiber head and lens structure is established to the external member cover, realizes encapsulation connection between them, compares with current scheme, has rejected the redundant space of old design, and compact structure when making optical device further miniaturized, still keeps the structural stability and the optimal parameter performance of device, especially long-term reliability and temperature performance.

The first sleeve member 13 and the second sleeve member 23 are both tubular structures, and are made of glass or ceramic.

And, the first lens structure 12 and the second lens structure 22 may each be a ball lens, a focusing lens, an aspherical lens, or the like.

Referring to fig. 3, the first optical fiber head 11 and the first lens structure 12 are packaged by the first kit 13, and the first optical fiber head 11 and the first lens structure 12 can be used for packaging connection of the spectral detector, so that the outer diameter of the spectral detector is reduced.

Further, the optical device further includes a third package 50 disposed between the first lens structure 12 and the package 40 and partially protruding the first slot 41, and a fourth package 60 disposed between the second lens structure 22 and the package 40 and partially protruding the second slot 42. By arranging the third kit 50 and the fourth kit 60, the contact area between the third kit 50 and the package 40 is large, and the contact area between the fourth kit 60 and the package 40 is large, so that the matching and assembling between the first lens structure 12 and the package 40 and between the second lens structure 22 and the package 40 are more stable, and during assembling, the first lens structure 12 is assembled in the third kit 50, the second lens structure 22 is assembled in the fourth kit 60, the first lens structure 12 and the third kit 50 are integrally assembled in the first slot 41, and the second lens structure 22 and the fourth kit 60 are integrally assembled in the second slot 42, so that the assembling is convenient, and the structure is compact and stable.

The first slot 41, the second slot 42 and the third slot 43 are all cylindrical slots, and the diameters of the first slot 41 and the second slot 42 are all larger than the diameter of the third slot 43. The encapsulation 40 forms an annular projection 44 on the inner surface between the first slot 41 and the second slot 42. During assembly, the end face of the third sleeve 50 is attached to one end face of the annular protrusion 44, and the end face of the fourth sleeve 60 is attached to the other end face of the annular protrusion 44, so that assembly is convenient.

Further, the dihedral angle between the end surface of the third component 50 close to the optical functional component and the cross section thereof is 0-8 °. The end face of the third sleeve 50 is attached to the end face of the optical function component, and the end face of the optical function component and the cross section of the third sleeve 50 form a dihedral angle of 0-8 °. The arrangement of the dihedral angle can compensate the dislocation amount generated during the light beam coupling between the first optical fiber head 11 and the first lens structure 12, so that the axial displacement amount between the first optical fiber head 11 and the first lens structure 12 is close to 0, and the axial displacement amount can be controlled within 5 um.

Further, the included angle between the end surface of the first lens structure 12 and the cross section thereof is 4-12 degrees, and the included angle between the end surface of the second lens structure 22 and the cross section thereof is 4-12 degrees. The arrangement of these two angles matches the angle of the dihedral angle between the end face of the third package 50 and its cross-section, compensating for the amount of axial displacement between the first fiber head 11 and the first lens structure 12.

In this embodiment, the first optical fiber head 11 includes a first capillary 111, and a first optical fiber 112 and a second optical fiber 113 disposed in the first capillary 111, and a distance between a connection line of centers of the first optical fiber 112 and the second optical fiber 113 and an axis of the first capillary 111 is 0-0.25 mm. If the displacement between the first optical fiber head 11 and the first lens structure 12 is axial and is replaced by the displacement, the displacement between the first optical fiber head 11 and the first lens structure 12 can be small.

The included angle between the end face of the first optical fiber head 11 and the cross section of the first optical fiber head is 4-12 degrees, and the included angle between the end face of the second optical fiber head 21 and the cross section of the second optical fiber head is 4-12 degrees. The arrangement of the two angles can ensure return loss and ensure the performance of the optical device.

In this embodiment, the optical device further includes a first outer sealing member 70 sleeved on the third sleeve member 50 and connected to one end of the package member 40, and a second outer sealing member 80 sleeved on the fourth sleeve member 60 and connected to the other end of the package member 40. During assembly, the first external sealing member 70 is sleeved on the third external sealing member 50, and the end surface of the first external sealing member is in fit butt joint with the end surface of the packaging member 40, and the second external sealing member 80 is sleeved on the fourth external sealing member 60, and the end surface of the second external sealing member is in fit butt joint with the other end surface of the packaging member 40, so that the optical device is integrally packaged, the structure is compact and stable, and long-term reliability and temperature performance can be kept.

Part of the outer surface of the third external member 50 is attached to the inner surface of the package member 40, and part of the outer surface of the third external member 50 is attached to the inner surface of the first external sealing member 70, so that the contact area between the third external member 50 and the package member 40 and the contact area between the third external member 50 and the first external sealing member 70 are large, and the matching and packaging structure of the first external sealing member 70, the third external member 50 and the package member 40 is stable; a part of the outer surface of the fourth package 60 is attached to the inner surface of the package member 40, a part of the outer surface of the fourth package 60 is attached to the inner surface of the second outer sealing member 80, and the contact area between the fourth package 60 and the package member 40 and the contact area between the fourth package 60 and the second outer sealing member 80 are large, so that the matching package structure of the second outer sealing member 80, the fourth package 60 and the package member 40 is stable, and the overall structure of the optical device is stable. The first outer sealing piece 70 and the second outer sealing piece 80 are connected in a packaging mode without being provided with thicker thickness, the overall outer diameter size of the optical device is greatly reduced, and the optical device is further miniaturized.

Further, the optical device further includes a rubber cap 90 sleeved on the first optical fiber 112 and the second optical fiber 113, and has a buffer effect on the first optical fiber 112 and the second optical fiber 113. The third optical fiber 212 may also be jacketed with a rubber cap 90.

In this embodiment, the third kit 50 and the package member 40, the fourth kit 60 and the package member 40, the first outer sealing member 70 and the third kit 50, and the second outer sealing member 80 and the fourth kit 60 may be bonded by using a suitable adhesive, which may be an ultraviolet curing adhesive or an ultraviolet curing and thermal curing dual curing adhesive. In this embodiment, ultraviolet curing and thermosetting dual-curing glue is preferably used for bonding to realize connection and fixation. The optical device has good stability and reliability, excellent temperature stability, simple and convenient assembly, improved production efficiency and reduced cost.

In this embodiment, the optical functional component is one of a filter 31, a beam splitter, and a faraday rotator 32. The structural schematic diagrams of the optical devices corresponding to the optical functional components of the optical filter device 31 and the faraday rotator device 32 correspond to fig. 1 and fig. 2, respectively.

Specifically, when the optical functional component is the optical filter device 31, a schematic structural diagram of the optical device is shown in fig. 1. The second optical fiber head 21 includes a second capillary 211, and a third optical fiber 212 disposed in the second capillary 211. Taking the filter device 31 as an example, the principle of the optical device will be explained: light enters from the first optical fiber 112 of the first optical fiber head 11, enters the first lens structure 12, enters the optical filter after being focused and collimated, is split according to the wavelength range, and after being split, one beam of light penetrates through the optical filter, enters the second lens structure 22, and is output from the third optical fiber 212 of the second optical fiber head 21; the other beam is reflected back into the first lens structure 12 again and out of the second optical fibre 113 of the first optical fibre head 11.

When the optical functional component is a faraday rotator 32, the structure of the optical device is schematically shown in fig. 2. Light enters from one of the optical fibers of the first optical fiber head 11, enters the Faraday rotator 32 after being focused and collimated by the first lens structure 12, and then is output to the second optical fiber head 21, so that unidirectional transmission of the light is realized, and the light wave transmission efficiency is improved.

The utility model discloses a but the wide application of packaging part 40 is in wavelength division multiplexer, polarization maintaining device, isolator, light splitting detector, attenuator, the encapsulation of devices such as faraday's circulator, also can be applied to the functional device encapsulation of various optical waveguides (laser transmission).

It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations should fall within the scope of the appended claims.

Claims (10)

1. An optical device comprises a first collimator, a second collimator and an optical functional assembly arranged between the first collimator and the second collimator, and is characterized by further comprising a packaging piece used for packaging and connecting the first collimator and the second collimator, wherein the packaging piece comprises a first slotted hole used for mounting the first collimator, a second slotted hole used for mounting the second collimator and a third slotted hole arranged between the first slotted hole and the second slotted hole and used for mounting the optical functional assembly, the first slotted hole, the second slotted hole and the third slotted hole are communicated with each other, and axes of the first slotted hole and the second slotted hole are arranged in a staggered mode.

2. The optical device as claimed in claim 1, wherein the first collimator comprises a first fiber head, a first lens structure mounted in the first slot, and a first sleeve disposed at a junction of the first fiber head and the first lens structure; the second collimator comprises a second optical fiber head, a second lens structure arranged in a second slotted hole, and a second sleeve sleeved at the joint of the second optical fiber head and the second lens structure.

3. The optical device as claimed in claim 2, further comprising a third sleeve disposed between the first lens structure and the package and partially protruding from the first slot, and a fourth sleeve disposed between the second lens structure and the package and partially protruding from the second slot.

4. The optical device according to claim 3, wherein a dihedral angle between the end surface of the third package adjacent to the optical functional component and the cross section thereof is 0 to 8 °.

5. The optical device according to claim 4, wherein an angle between the end surface of the first lens structure and the cross section thereof is 4-12 °, and an angle between the end surface of the second lens structure and the cross section thereof is 4-12 °.

6. The optical device according to claim 2, wherein the first optical fiber head comprises a first capillary, and a first optical fiber and a second optical fiber which are arranged in the first capillary, and a distance between a connecting line of centers of the first optical fiber and the second optical fiber and an axis of the first capillary is 0-0.25 mm.

7. The optical device according to claim 2, wherein an angle between the end face of the first optical fiber head and the cross section thereof is 4 to 12 °, and an angle between the end face of the second optical fiber head and the cross section thereof is 4 to 12 °.

8. The optical device as claimed in claim 3, further comprising a first outer package sleeved on the third sleeve and connected to one end of the package, and a second outer package sleeved on the fourth sleeve and connected to the other end of the package.

9. The optical device as claimed in claim 1, wherein the first, second and third slots are all cylindrical slots, and wherein the first and second slots each have a diameter greater than the diameter of the third slot.

10. An optical device according to any one of claims 1-9, wherein the optical functional component is one of a filter device, a beam splitter device, and a faraday rotator device.

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