CN214503951U

CN214503951U - Mechanical fixed type adjustable optical attenuator

Info

Publication number: CN214503951U
Application number: CN202022728377.2U
Authority: CN
Inventors: 徐济长; 钟明望
Original assignee: Shanghai Changyue Communication Co ltd
Current assignee: Shanghai Changyue Communication Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-10-26
Anticipated expiration: 2030-11-23

Abstract

The utility model discloses a mechanical fixed type variable optical attenuator, which comprises an optical fiber configurator and an attenuator light blocking knob; the optical fiber configurator comprises two groups of single-fiber collimators which are oppositely arranged and a glass tube coupler which connects the two groups of single-fiber collimators in a centering way; the glass tube coupler is hollow, a plurality of groups of round holes are arranged on the surface of the glass tube coupler, and a guide hole for screwing in and screwing out the light blocking knob of the attenuator is arranged in the middle of the glass tube coupler; the attenuator light blocking knob comprises a manual mechanical knob and a light blocking element, and the light blocking element is driven to move smoothly and linearly in the guide hole by adjusting the manual mechanical knob; the utility model takes into account both adjustable attenuation and fixed attenuation, when adjusting the light attenuation, the user can manually control the rotation of the knob in the guide hole to slowly block the light path of the collimator coupling piece, so that the attenuation is changed by the lateral movement, and the design decision is made; and finally, the fixable attenuation value is achieved through the positioning of the attenuation positioning pin.

Description

Mechanical fixed type adjustable optical attenuator

Technical Field

The utility model relates to a mechanical fixed variable optical attenuator.

Background

The mechanical optical attenuator is an optical passive device for reducing the intensity of an optical signal, and is widely applied to optical transmission systems and optical networks, such as optical test systems, optical signal transmission systems, and the like.

The optical fiber attenuator is the most basic element in an optical fiber passive device, and currently, fixed attenuators and adjustable attenuators are available in the market. In the adjustable optical fiber attenuator, the fixed adjustable attenuator has the advantages of low cost and low loss. The existing fixed adjustable attenuator utilizes a very precise knob to realize attenuation by mechanically rotating and slowly blocking an optical path. The variable optical attenuator of the type also has various specific implementation modes, the driving light blocking element is blocked between the two collimators, and the attenuation of the optical power is realized, but the existing variable optical attenuator is difficult to integrate due to insufficient mechanical precision and difficult automatic production, and meanwhile, the adjustable attenuation and the fixed attenuation are difficult to be considered, and the variable optical attenuator has the defects of large volume, complex component structure, low response speed and the like and is difficult to be applied in a large quantity.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a mechanically fixed variable optical attenuator for solving the above problems.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: a mechanical fixed type variable optical attenuator comprises an optical fiber configurator and an attenuator light blocking knob;

the optical fiber configurator comprises two groups of single-fiber collimators which are oppositely arranged and a glass tube coupler which connects the two groups of single-fiber collimators in a centering way;

the single-fiber collimator comprises a C lens and a single-fiber tail fiber glass tube glued on one side of the C lens; the optical fiber penetrates into the single-fiber tail fiber glass tube from one end of the single-fiber tail fiber glass tube and extends into the joint of the single-fiber tail fiber glass tube and the lens C;

the optical fiber extending section at the tail part of the single-fiber tail optical fiber glass tube is also provided with a single-fiber tail sheath; an outer sealing rigid cap is arranged between the single fiber tail sheath and the single fiber tail fiber glass tube, one side of the outer sealing rigid cap is matched with the single fiber tail sheath, and the other side of the outer sealing rigid cap is sleeved with another group of outer sealing rigid caps through a glass tube coupler; the glass tube coupler enables the two groups of single-fiber collimators to be linearly and directly coupled so that the optical attenuator obtains the minimum insertion loss, and meanwhile, the single-fiber collimators are fixed in the circular hole of the glass tube coupler;

the glass tube coupler is hollow, a plurality of groups of round holes are arranged on the surface of the glass tube coupler, and a guide hole for screwing in and screwing out the light blocking knob of the attenuator is arranged in the middle of the glass tube coupler;

the attenuator light blocking knob comprises a manual mechanical knob and a light blocking element, and the light blocking element is driven to move smoothly and linearly in the guide hole by adjusting the manual mechanical knob;

the gap between the guide hole and the light blocking element is also filled with high-vacuum grease;

an attenuator box body is arranged outside the glass tube coupler and the light blocking knob of the attenuator; mounting holes for mounting outer sealing rigid caps are arranged at two sides of the attenuator box body, and mounting holes for fixing the attenuator box body are arranged below the attenuator box body;

and the attenuator light blocking knob is also provided with an attenuator positioning pin for fixing the light blocking element at a proper height.

Furthermore, the tail part of the optical fiber is additionally provided with a glass sleeve, and the glass sleeve is used for connecting the photoelectric device at the light inlet end or the light outlet end.

To sum up the utility model discloses following beneficial effect has: the utility model discloses compromise adjustable attenuation and fixed attenuation, when adjusting the light attenuation volume, the user can control the knob to rotate in the guide hole slowly and block the light path of collimator coupling piece manually, the moving range of mechanical knob, and its length, width and concave curvature can be according to the index that will reach, make the characteristic that the attenuation volume lateral shifting changes, come the design decision; and finally, the fixable attenuation value is achieved through the positioning of the attenuation positioning pin.

Drawings

FIG. 1 is a schematic structural view of the present invention;

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

fig. 3 is a schematic structural diagram of the single-fiber collimator of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention.

As shown in fig. 1, 2 and 3, a mechanically fixed variable optical attenuator includes an optical fiber distributor and an attenuator light blocking knob;

the optical fiber configurator comprises two groups of single-fiber collimators 1 which are oppositely arranged and a glass tube coupler 2 which connects the two groups of single-fiber collimators 1 in a centering way;

the single-fiber collimator 1 comprises a C lens 1-1 and a single-fiber tail fiber glass tube 1-2 glued on one side of the C lens 1-1; the optical fiber penetrates into the single-fiber tail fiber glass tube 1-2 from one end of the single-fiber tail fiber glass tube 1-2 and extends into the joint of the single-fiber tail fiber glass tube 1-2 and the C lens 1-1;

the optical fiber extending section at the tail part of the single fiber tail fiber glass tube 1-2 is also provided with a single fiber tail sheath 1-3; an outer sealing rigid cap 1-4 is also arranged between the single fiber tail sheath 1-3 and the single fiber tail fiber glass tube 1-2, one side of the outer sealing rigid cap 1-4 is matched with the single fiber tail sheath 1-3, and the other side is sleeved with another group of outer sealing rigid caps 1-4 through the glass tube coupler 2; the glass tube coupler 2 couples the two groups of single-fiber collimators 1 in the same straight line to obtain the minimum insertion loss of the optical attenuator, and simultaneously fixes the single-fiber collimators 1 in the round holes of the glass tube coupler 2;

the glass tube coupler 2 is hollow, a plurality of groups of round holes are arranged on the surface of the glass tube coupler, and a guide hole 3 for screwing in and screwing out the light blocking knob of the attenuator is arranged in the middle of the glass tube coupler;

the attenuator light blocking knob comprises a manual mechanical knob 4 and a light blocking element 5, and the light blocking element 5 is driven to smoothly and linearly move in the guide hole 3 by adjusting the manual mechanical knob 4; when the light attenuation quantity is adjusted, a user can manually control the rotation of the knob in the guide hole to slowly block the light path of the collimator coupling piece, and the movement range, the length, the width and the concave curvature of the mechanical knob can be designed and determined according to the characteristics that the attenuation quantity transversely moves and changes according to the required indexes;

meanwhile, aiming at the arrangement and mechanical structure of the manual mechanical knob 4 and the light blocking element 5, an internal thread can be arranged in the attenuator box body 6, the manual mechanical knob 4 and the light blocking element 5 are integrally arranged, an external thread and an internal thread are arranged at the joint of the manual mechanical knob 4 and the light blocking element 5 to be matched, the manual mechanical knob 4 is rotated to drive the light blocking element 5 to move up and down smoothly and linearly, an attenuator positioning pin 8 can be additionally arranged, and the attenuator light blocking knob is screwed in and then abuts against the external thread to prevent the attenuator light blocking element from rotating to fix the light blocking element 5;

the gap between the guide hole 3 and the light blocking element 5 is also filled with high vacuum grease which is smeared around the thread of the guide hole to prevent water vapor from entering the box body and play a role of lubrication between the guide hole and the light blocking element; the deviation of the mechanical knob linear track can change the attenuation of the collimator coupling, and the lubrication action can make the mechanical knob move smoothly and linearly and prevent the mechanical knob from deviating from the axis;

the attenuator box body 6 is arranged outside the glass tube coupler 2 and the light blocking knob of the attenuator; mounting holes for mounting external rigid caps are arranged at two sides of the attenuator box body 6, and mounting holes 7 for fixing the attenuator box body are arranged below the attenuator box body;

the attenuator light blocking knob is also provided with an attenuator positioning pin 8 for fixing the light blocking element 5 at a suitable height to achieve the purpose of a fixable attenuation value.

The tail part of the optical fiber is also additionally provided with a glass sleeve 9, and the glass sleeve 9 is used for connecting an optoelectronic device at a light inlet end or a light outlet end.

The above embodiment is the preferred embodiment of the present invention, which is only used to facilitate the explanation of the present invention, it is not right to the present invention, which makes the restriction on any form, and any person who knows commonly in the technical field can use the present invention to make the equivalent embodiment of local change or modification without departing from the technical features of the present invention.

Claims

1. The utility model provides a mechanical fixed adjustable optical attenuator, it includes optic fibre configurator and attenuator knob that is in the light, its characterized in that: the optical fiber configurator comprises two groups of single-fiber collimators which are oppositely arranged and a glass tube coupler which connects the two groups of single-fiber collimators in a centering way; the single-fiber collimator comprises a C lens and a single-fiber tail fiber glass tube glued on one side of the C lens; the optical fiber penetrates into the single-fiber tail fiber glass tube from one end of the single-fiber tail fiber glass tube and extends into the joint of the single-fiber tail fiber glass tube and the lens C; the optical fiber extending section at the tail part of the single-fiber tail optical fiber glass tube is also provided with a single-fiber tail sheath; an outer sealing rigid cap is arranged between the single fiber tail sheath and the single fiber tail fiber glass tube, one side of the outer sealing rigid cap is matched with the single fiber tail sheath, and the other side of the outer sealing rigid cap is sleeved with another group of outer sealing rigid caps through a glass tube coupler; the glass tube coupler enables the two groups of single-fiber collimators to be linearly and directly coupled so that the optical attenuator obtains the minimum insertion loss, and meanwhile, the single-fiber collimators are fixed in the circular hole of the glass tube coupler; the glass tube coupler is hollow, a plurality of groups of round holes are arranged on the surface of the glass tube coupler, and a guide hole for screwing in and screwing out the light blocking knob of the attenuator is arranged in the middle of the glass tube coupler; the attenuator light blocking knob comprises a manual mechanical knob and a light blocking element, and the light blocking element is driven to move smoothly and linearly in the guide hole by adjusting the manual mechanical knob; the gap between the guide hole and the light blocking element is also filled with high-vacuum grease; an attenuator box body is arranged outside the glass tube coupler and the light blocking knob of the attenuator; mounting holes for mounting outer sealing rigid caps are arranged at two sides of the attenuator box body, and mounting holes for fixing the attenuator box body are arranged below the attenuator box body; and the attenuator light blocking knob is also provided with an attenuator positioning pin for fixing the light blocking element at a proper height.

2. A mechanically fixed variable optical attenuator according to claim 1, wherein: and the tail part of the optical fiber is also additionally provided with a glass sleeve, and the glass sleeve is used for connecting a photoelectric device at a light inlet end or a light outlet end.