CN217404668U

CN217404668U - Optical fiber isolator

Info

Publication number: CN217404668U
Application number: CN202221389510.9U
Authority: CN
Inventors: 余家军; 冯辉; 刘志勇
Original assignee: Chengdu Xunhong Photoelectric Technology Co ltd
Current assignee: Chengdu Xunhong Photoelectric Technology Co ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-09-09
Anticipated expiration: 2032-06-06

Abstract

The utility model discloses a fiber isolator, include: the optical fiber isolation core, the equal threaded connection in both ends of optical fiber isolation core has optical fiber collimator, two the equal fixedly connected with lens of relative one end of optical fiber collimator, two the one end that optical fiber collimator kept away from mutually all runs through there is the optic fibre body, the inside of optical fiber isolation core just is located two inlay between the relative one side of lens and be equipped with the crystal assembly, the crystal assembly is including sealed lid, sealed lid inlays the back of locating optical fiber isolation core, the both sides of sealed lid surface all inlay and are equipped with fastening screw. The utility model discloses an inlay the fastening screw of establishing into sealed lid, accomplish the quick installation and the dismantlement of sealed lid, then will install faraday crystal and crystal prism's installation pipe and take out from the inside of optic fibre isolation core fast, conveniently keep apart the inside prism of core and carry out quick replacement to optic fibre, effectively prolong the isolation effect of optic fibre isolator, guarantee light source spectrum purity.

Description

Optical fiber isolator

Technical Field

The utility model relates to an optical fiber communication field especially relates to a fiber isolator.

Background

The optical fiber isolator, a communication term, is an optical fiber device for maintaining the spectral purity of a light source, is made by using the birefringence phenomenon of a single-mode optical fiber, can avoid the spectral purity reduction of the light source (usually a laser) due to the influence of reflected backward light, and is applied to advanced optical fiber communication and optical fiber sensing systems.

This prior art solution also has the following problems when in use:

the external optical fiber isolation core of the existing optical fiber isolator is closed, so that an internal prism or a crystal cannot be replaced independently after being damaged, the inside of the optical fiber isolator cannot be overhauled conveniently, and the spectral purity of a light source is reduced after the optical fiber isolator is used for a long time.

Therefore, there is a need for a fiber isolator to solve the problems set forth in the background above.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model relates to a fiber isolator has and carries out the advantage of changing the maintenance alone to the inside crystal of fiber isolator or prism.

The technical scheme of the utility model is that: the utility model provides a fiber isolator, includes that optic fibre keeps apart the core, the equal threaded connection in both ends that optic fibre kept apart the core has fiber collimator, two the equal fixedly connected with lens of relative one end of fiber collimator, two fiber collimator one end that the looks left from all runs through there is the optic fibre body, the inside of optic fibre keeps apart the core and is located two inlay between the relative one side of lens and be equipped with crystal assembly, crystal assembly includes sealed lid, sealed lid inlays the back of locating the core is kept apart to optic fibre, the both sides of sealed lid surface all inlay and are equipped with fastening screw, and the one end of two fastening screws all runs through into in the outer wall that optic fibre kept apart the core.

In a further technical scheme, the inner wall of the sealing cover and the inner part of the optical fiber isolation core are fixedly connected with an installation pipe.

In a further technical scheme, a Faraday crystal is arranged inside the installation tube.

In a further technical scheme, crystal prisms are fixedly connected to the inner part of the mounting tube and the two sides of the Faraday crystal.

In a further technical scheme, the opposite ends of the two lenses penetrate through the optical fiber isolation core and extend to the inside of the optical fiber isolation core.

In a further aspect, one end of the optical fiber body extends through the lens and into the lens.

In a further technical scheme, the fastening screw is in threaded connection with the optical fiber isolation core, and the fastening screw is in threaded connection with the sealing cover.

The utility model has the advantages that:

1. the utility model discloses in, through inlaying the fastening screw of establishing into sealed lid, accomplish the quick installation and the dismantlement of sealed lid, then will install faraday crystal and crystal prism's installation pipe and take out from the inside of optic fibre isolation core fast, conveniently keep apart the inside prism of core and carry out quick replacement to optic fibre, effectively prolong the isolation effect of optic fibre isolator, guarantee light source spectrum purity.

2. The utility model discloses in, through the both ends with fiber collimator threaded connection to fiber isolation core, can be through simple rotation, demolish fiber collimator from fiber isolation core's both ends, simplify the mounting means to fiber collimator, improve fiber isolator's packaging efficiency.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic top sectional view of the present invention;

fig. 4 is a schematic side sectional view of the present invention.

Description of reference numerals:

1. an optical fiber isolation core; 2. an optical fiber collimator; 3. an optical fiber body; 4. a lens; 5. a crystal assembly; 51. a sealing cover; 52. installing a pipe; 53. a Faraday crystal; 54. a crystal prism; 55. and (5) fastening the screw.

Detailed Description

The embodiments of the present invention will be further explained with reference to the drawings.

Example (b):

as shown in fig. 1-4, an optical fiber isolator, keep apart core 1 including optic fibre, the equal threaded connection in both ends of core 1 is kept apart to optic fibre has optical collimator 2, the equal fixedly connected with lens 4 of the relative one end of two optical collimator 2, the one end that two optical collimator 2 kept apart has all run through optical fiber body 3, the inside of core 1 is kept apart to optic fibre and is located and inlays between the relative one side of two lens 4 and be equipped with crystal assembly 5, crystal assembly 5 is including sealed lid 51, sealed lid 51 inlays the back of locating core 1 is kept apart to optic fibre, the both sides of sealed lid 51 surface all inlay and are equipped with fastening screw 55, the one end of two fastening screw 55 all runs through in the outer wall of core 1 is kept apart to optic fibre, the stealthy groove that cooperation fastening screw 55 inlayed is seted up to the back of sealed lid 51, the screw hole of cooperation fastening screw 55 threaded connection is seted up on the sealed lid 51.

In another embodiment, the inner wall of the sealing cover 51 and located inside the optical fiber isolation core 1 is fixedly connected with a mounting tube 52, the bottom of the tube surface of the mounting tube 52 is embedded with the inner wall of the optical fiber isolation core 1, and the inner wall of the optical fiber isolation core 1 is provided with a groove matched with the embedding of the mounting tube 52.

In another embodiment, the interior of the mounting tube 52 is provided with a faraday crystal 53, the faraday crystal 53 being a crystal having a faraday effect, a magneto-optical effect, which is an interaction of the optical wave and the magnetic field in the medium, which causes a rotation of the polarization plane, which rotation is linearly proportional to the component of the magnetic field in the direction of propagation of the optical wave.

In another embodiment, a crystal prism 54 is fixedly connected to both sides of the faraday crystal 53 inside the mounting tube 52, and the crystal prism 54 and the faraday crystal 53 are fixed inside the mounting tube 52 by thermosetting adhesive.

In another embodiment, the two lenses 4 have opposite ends penetrating through the fiber-optic spacer core 1 and extending into the fiber-optic spacer core 1, and the ends of the two lenses 4 close to each other are spherical.

In another embodiment, one end of the optical fiber body 3 extends through the lens 4 and extends into the lens 4, and the two lens 4 ends away from each other are both flat.

In another embodiment, the fastening screw 55 is screwed with the optical fiber isolation core 1, the fastening screw 55 is screwed with the sealing cover 51, and a threaded hole matched with the fastening screw 55 for screwing is opened on the outer wall of the optical fiber isolation core 1.

The working principle of the embodiment is as follows: when the optical fiber isolator is used, if the internal prism or optical fiber of the optical fiber isolator needs to be overhauled and replaced in the using process, the fastening screws 55 on the two sides of the outer surfaces of the two sealing covers 51 are unscrewed, so that the sealing cover 51 embedded in the back surface of the optical fiber isolation core 1 is not fixed with the optical fiber isolation core 1, the mounting pipe 52 can be pulled out from the internal part of the optical fiber isolation core 1, the crystal prism 54 and the Faraday crystal 53 in the mounting pipe 52 can be overhauled and replaced, the inner wall of the optical fiber isolation core 1 is provided with a groove matched with the mounting pipe 52 in an embedded manner, after the crystal prism 54 and the Faraday crystal 53 are overhauled, the groove on the inner wall of the optical fiber isolation core 1 of the mounting pipe 52 is aligned, meanwhile, the threaded hole on the sealing cover 51 is aligned with the threaded hole on the back surface of the optical fiber isolation core 1, the fastening screws 55 are matched with the threaded hole for use, and the sealing cover 51 and the optical fiber isolation core 1 are fixed, the two optical fiber collimators 2 are fixed at two ends of the optical fiber isolation core 1 through threaded connection, so that the optical fiber collimators 2 can be disassembled by reversely rotating the optical fiber collimators 2, the optical fiber collimators 2 are convenient to overhaul and replace, and the characteristic of the optical fiber isolator is realized.

The above embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The utility model provides a fiber isolator, keeps apart the core including optic fibre, its characterized in that, the equal threaded connection in both ends that the core was kept apart to optic fibre has fiber collimator, two fiber collimator's the equal fixedly connected with lens in relative one end, two fiber collimator one end that leaves has all run through the optic fibre body, the inside that the core was kept apart to optic fibre just is located two inlay between the relative one side of lens and be equipped with the crystal subassembly, the crystal subassembly is including sealed lid, sealed lid inlays the back of locating fiber isolation core, the both sides of sealed lid surface all inlay and are equipped with fastening screw, and the one end of two fastening screws all runs through into in the outer wall that the core was kept apart to optic fibre.

2. A fibre optic isolator according to claim 1, wherein: and the inner wall of the sealing cover is fixedly connected with an installation pipe which is positioned in the optical fiber isolation core.

3. A fibre optic isolator according to claim 2, wherein: and a Faraday crystal is arranged in the mounting tube.

4. A fibre optic isolator according to claim 3, wherein: the mounting tube is internally and fixedly connected with crystal prisms on two sides of the Faraday crystal.

5. A fibre optic isolator according to claim 1, wherein: the opposite ends of the two lenses penetrate through the optical fiber isolation core and extend to the inside of the optical fiber isolation core.

6. A fibre optic isolator according to claim 1, wherein: one end of the optical fiber body penetrates through the lens and extends to the inside of the lens.

7. A fibre optic isolator according to claim 1, wherein: the fastening screw is in threaded connection with the optical fiber isolation core and is in threaded connection with the sealing cover.