CN210199350U - 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 to and locate the optical function subassembly between first collimator and the second collimator, optical device is still including the packaging part that is used for the encapsulation to connect first collimator and second collimator, locates the first external member that partly outstanding packaging part set up between first collimator and the packaging part, and locates the second external member that partly outstanding packaging part set up between second collimator and the packaging part. The utility model discloses can realize realizing the outer encapsulation with less thickness realization first collimator and second collimator, need not to set up than thicker thickness, alright guarantee bonding structure's stability, further reduce optical device's external diameter size, 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, the coupling joints of two collimators are packaged and connected through a sleeve, then the two ends of the sleeve are respectively connected with the end faces of the outer sealing pieces corresponding to the two collimators in a butt joint and bonding mode to realize connection, and the sleeve and the two outer sealing pieces both need enough thickness to ensure the stability of a bonding structure. This determines that there is a minimum size for the devices of the structure. Further miniaturization of the optical device is difficult.

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 the further big problem of miniaturization difficulty of current optical device.

The utility model provides a technical scheme that its technical problem adopted is: an optical device is provided, comprising a first collimator and a second collimator, and an optical functional assembly arranged between the first collimator and the second collimator, the optical device further comprising a package for packaging and connecting the first collimator and the second collimator, a first sleeve arranged between the first collimator and the package and partially protruding the package, and a second sleeve arranged between the second collimator and the package and partially protruding the package.

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

The utility model discloses a further preferred scheme is: the first collimator comprises a first optical fiber head, a first lens structure partially arranged in the packaging piece, and a third sleeve piece 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 partially installed in the packaging piece, and a fourth sleeve piece sleeved at the joint of the second optical fiber head and the second lens structure, and the optical function assembly is arranged between the first lens structure and the second lens structure.

The utility model discloses a further preferred scheme is: the dihedral angle between the end face of the first sleeve, which is close to the optical functional component, and the cross section of the first sleeve 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 packaging piece comprises a first slotted hole used for installing a first collimator, a second slotted hole used for installing a second collimator and a third slotted hole arranged between the first slotted hole and the second slotted hole and used for installing an optical functional assembly, wherein 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 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 of encapsulation connection first collimator and second collimator, first external member and second external member, first external member is located between first collimator and the packaging part and the setting of part outstanding packaging part, the second external member is located between second collimator and the packaging part and the setting of part outstanding packaging part, the outer encapsulation accessible of realizing first collimator and second collimator bonds with the periphery of first external member and second external member, and bond with the both ends face of packaging part, bonding area is big, need not to set up thicker thickness, alright guarantee bonding structure's stability, further reduce optical device's external diameter size, overall structure is compact, realize optical device's miniaturized design.

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 comprising a first collimator and a second collimator, and an optical function assembly 30 arranged between the first collimator and the second collimator, the optical device further comprising an encapsulation 40 for encapsulating the first collimator and the second collimator, a first sleeve 50 arranged between the first collimator and the encapsulation 40 and arranged partly protruding from the encapsulation 40, and a second sleeve 60 arranged between the second collimator and the encapsulation 40 and arranged partly protruding from the encapsulation 40.

The packaging piece 40 for packaging and connecting the first collimator and the second collimator is arranged, the first sleeve piece 50 and the second sleeve piece 60 are arranged, the first sleeve piece 50 is arranged between the first collimator and the packaging piece 40 and partially protrudes out of the packaging piece 40, the second sleeve piece 60 is arranged between the second collimator and the packaging piece 40 and partially protrudes out of the packaging piece 40, the outer packaging of the first collimator and the second collimator can be bonded with the peripheries of the first sleeve piece 50 and the second sleeve piece 60 and bonded with two end faces of the packaging piece 40, the bonding contact area is large, the thicker thickness is not required to be arranged, the stability of a bonding structure can be guaranteed, the outer diameter size of the optical device is further reduced, the whole structure is compact, and the miniaturization design of the optical device is realized.

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

Wherein, a part of the outer surface of the first external member 50 is attached to the inner surface of the package member 40, and a part of the outer surface of the first external member 50 is attached to the inner surface of the first external sealing member 70, and the contact area between the first external member 50 and the package member 40 and the first external sealing member 70 is large, so that the matching and packaging structure of the first external sealing member 70, the first external member 50 and the package member 40 is stable; a part of the outer surface of the second sheathing member 60 is attached to the inner surface of the encapsulation member 40, a part of the outer surface of the second sheathing member 60 is attached to the inner surface of the second encapsulation member 80, and the contact area between the second sheathing member 60 and the encapsulation member 40 and the contact area between the second sheathing member 60 and the second encapsulation member 80 are large, so that the matching encapsulation structure of the second encapsulation member 80, the second sheathing member 60 and the encapsulation 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 can realize the outer packaging of the first collimator and the second collimator without setting a thicker thickness, so that the overall outer diameter of the optical device is greatly reduced, and the optical device is further miniaturized.

Further, the first collimator includes a first fiber head 11, a first lens structure 12 partially installed in the package 40, and a third sleeve 13 sleeved at a connection position of the first fiber head 11 and the first lens structure 12; the second collimator includes a second fiber head 21, a second lens structure 22 partially installed in the package 40, and a fourth sleeve 23 sleeved at a joint of the second fiber head 21 and the second lens structure 22, and the optical function component 30 is disposed between the first lens structure 12 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 third 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 fourth 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 third sleeve member 13 and the fourth 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 packaging form of the third package 13 for the first fiber head 11 and the first lens structure 12 can be applied to the packaging connection of the first fiber head 11 and the first lens structure 12 in the spectral detector, and the outer diameter of the spectral detector is reduced.

In this embodiment, the dihedral angle between the end surface of the first sleeve 50 close to the optical functional assembly 30 and the cross section thereof is 0-8 °. Wherein, the end face of the first sleeve 50 is attached to the end face of the optical function component 30, and the end face of the optical function component 30 also has a dihedral angle with the cross section of the first sleeve 50, and is 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 first ferrule 50 and its cross-section, compensating for the amount of axial displacement between the first fiber tip 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 package 40 includes a first slot 41 for mounting a first collimator, a second slot 42 for mounting a second collimator, and a third slot 43 disposed between the first slot 41 and the second slot 42 for mounting the optical functional assembly 30, wherein the first slot 41, the second slot 42, and the third slot 43 are communicated with each other, and axes of the first slot 41 and the second slot 42 are arranged in a staggered manner.

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 30 is mounted in the third slot 43 near the center of the package 40. 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 first sleeve 50 is attached to one end face of the annular protrusion 44, and the end face of the second sleeve 60 is attached to the other end face of the annular protrusion 44, so that assembly is convenient.

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.

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 first sleeve member 50 and the package member 40, the second sleeve member 60 and the package member 40, the first outer sealing member 70 and the first sleeve member 50, and the second outer sealing member 80 and the second sleeve member 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 30 is one of a filter 31, a beam splitter, and a faraday rotator 32. The schematic structural diagrams of the optical devices corresponding to the optical functional component 30, which is 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 30 is a 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 module 30 is a faraday rotator 32, the schematic structure of the optical device is 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 comprising a first collimator and a second collimator, and an optical functional assembly arranged between the first collimator and the second collimator, characterized in that the optical device further comprises a package for enclosing and connecting the first collimator and the second collimator, a first sleeve arranged between the first collimator and the package and partly protruding from the package, and a second sleeve arranged between the second collimator and the package and partly protruding from the package.

2. The optical device as claimed in claim 1, further comprising a first outer sealing member sleeved on the first sleeve and connected to one end of the package, and a second outer sealing member sleeved on the second sleeve and connected to the other end of the package.

3. The optical device of claim 2, wherein the first collimator includes a first fiber tip, a first lens structure partially mounted in the package, and a third sleeve fitting over a junction of the first fiber tip and the first lens structure; the second collimator comprises a second optical fiber head, a second lens structure partially installed in the packaging piece, and a fourth sleeve piece sleeved at the joint of the second optical fiber head and the second lens structure, and the optical function assembly is arranged between the first lens structure and the second lens structure.

4. An optical device according to claim 3, wherein the dihedral angle between the end face of the first package adjacent the optically functional element and the cross-section thereof is 0-8 °.

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 3, 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 3, 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 1, wherein the package includes a first slot for mounting the first collimator, a second slot for mounting the second collimator, and a third slot disposed between the first slot and the second slot for mounting the optical functional assembly, the first slot, the second slot, and the third slot being in communication with each other, and axes of the first slot and the second slot being offset.

9. The optical device as claimed in claim 8, 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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