CN220454834U

CN220454834U - Detection device capable of responding to multiple wavelengths

Info

Publication number: CN220454834U
Application number: CN202321689778.9U
Authority: CN
Inventors: 华俊
Original assignee: XI'AN OE PHOTONICS TECHNOLOGY CO LTD
Current assignee: XI'AN OE PHOTONICS TECHNOLOGY CO LTD
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2024-02-06
Anticipated expiration: 2033-06-30

Abstract

The utility model provides a detection device capable of responding to multiple wavelengths, which comprises a front cover plate, a shell, a rear cover plate, a filter changing module, a narrow-band filter, a servo motor, a photodiode, a bracket and a light-passing hole, wherein the front cover plate, the shell and the rear cover plate are sequentially arranged from front to back, the filter changing module is arranged in the shell, the narrow-band filter is arranged in the filter changing module, the servo motor is connected with the middle part of the filter changing module, the photodiode is arranged at the rear part of the filter changing module, and the bracket is used for fixing the photodiode and the light-passing hole is arranged on the front cover plate. The narrow-band filter plate rotating disc is driven by the servo motor to rotate so as to replace the narrow-band filter plates on different hole sites, the light passing holes of the front cover plate and the receiving surface of the PIN type photodiode are coaxial and are relatively fixed in position, and the multi-wavelength laser can be tested through the position change of the narrow-band filter plate, so that the structure is simple and convenient, and the operation is convenient.

Description

Detection device capable of responding to multiple wavelengths

Technical Field

The utility model relates to the technical field of measurement and test, in particular to a detection device capable of responding to multiple wavelengths.

Background

Along with the change of market demands, the semiconductor laser industry is continuously developed, and the functions of purely laser coupling, matched thermosensitive temperature control, plug detection, PIN type photodiode detection feedback and the like are perfected, so that the use scene of the semiconductor optical fiber coupled laser is wider and wider, and the functions are stronger and stronger. The product is gradually enriched from low-power single wavelength to high-power multi-wavelength.

In a multi-wavelength semiconductor fiber coupled laser, the output power of the chip is attenuated or even damaged due to improper operation or environmental influence, and a single PIN type photodiode cannot detect which wavelength band of the chip has a problem. The PIN photodiodes have a large corresponding range for different wavelengths, whereas the normal wavelength range of use of semiconductor laser chips is typically between + -10nm.

Therefore, a multi-wavelength detection device is needed.

Disclosure of Invention

The utility model aims to solve the detection problem of a multi-wavelength laser, and provides a detection device capable of responding to multiple wavelengths, wherein a servo motor drives a filter turntable to rotate to replace narrow-band filters on different hole sites, a light passing hole of a front cover plate and a receiving surface of a PIN type photodiode are coaxial and are relatively fixed in position, and the multi-wavelength laser can be tested through the position change of the narrow-band filters, so that the detection device is simple in structure and convenient to operate.

The utility model provides a detection device capable of responding to multiple wavelengths, which comprises a front cover plate, a shell, a rear cover plate, a filter changing module, a narrow-band filter, a servo motor, a photodiode, a bracket and a light-passing hole, wherein the front cover plate, the shell and the rear cover plate are sequentially arranged from front to back;

the shell is of a hollow structure, and the narrow-band filter, the servo motor, the photodiode and the bracket are all arranged in the shell;

the number of the narrow-band filters is at least two, the servo motor drives the filter replacement module to rotate and rotate the narrow-band filters to the front end of the photodiode, and the light through holes are through holes formed in the front end of the photodiode.

In the detection device capable of responding to multiple wavelengths, the filter changing module comprises a filter changing plate, at least two filter mounting holes arranged on the filter changing plate and a detachable filter pressing ring arranged in the filter mounting holes,

the filter plate conversion plate is of a flat structure, the filter plate mounting hole is a through hole, the filter plate pressing ring is of a hollow structure, and the narrow-band filter plate through filter plate pressing ring is fixed in the filter plate mounting hole;

the servo motor, the photodiode and the bracket are all arranged at the rear side of the filter conversion disc.

According to the detection device capable of responding to multiple wavelengths, as an optimal mode, the filter replacing module further comprises the rotating shaft mounting holes arranged in the center, and the filter mounting holes are symmetrically distributed by taking the rotating shaft mounting holes as the center.

According to the detection device capable of responding to multiple wavelengths, as an optimal mode, the rotating shaft mounting hole and the rotating shaft of the servo motor are fixed through AB glue.

According to the detection device capable of responding to multiple wavelengths, as an optimal mode, the filter plate conversion disc is of a circular plate-shaped structure, the filter plate mounting holes and the rotating shaft mounting holes are all circular through holes, the filter plate pressing ring is a circular rubber ring, and the distance from the center of the filter plate mounting hole to the center of the rotating shaft mounting hole is equal to the distance from the light transmission hole to the center of the rotating shaft mounting hole.

The utility model relates to a detection device capable of responding to multiple wavelengths, which is characterized in that a bracket comprises a semicircular bracket arranged in the middle, plate-shaped connecting structures connected to two sides of the semicircular bracket, a fixed plate fixed with the tail end of the plate-shaped connecting structures and a photodiode support frame arranged at the upper part of one side of the plate-shaped connecting structures;

the fixed plate is an arc plate fixed on the inner wall of the shell, and the main body of the servo motor is fixed on the semicircular bracket.

According to the detection device capable of responding to multiple wavelengths, as an optimal mode, the support further comprises the fixing support which is fixed on the upper portion of the photodiode support and extends forwards, the upper surface of the photodiode support is arc-shaped, the fixing support is of a hollow cylindrical structure, and the photodiode is fixed in the fixing support.

According to the detection device capable of responding to multiple wavelengths, as a preferable mode, the front cover plate, the shell and the rear cover plate are bonded into a closed cylinder through AB glue, the front cover plate is of a circular plate-shaped structure, and the rear cover plate is of a circular cover plate;

the photodiode is a PIN photodiode;

the narrow-band filter is optical glass with single-sided coating.

In a preferred embodiment, the photodiode is a TO46 packaged InGaAs-based photodiode.

The detection device capable of responding to multiple wavelengths, which is disclosed by the utility model, preferably further comprises a lead hole arranged on the rear cover plate, wherein the lead hole is a through hole.

The utility model designs a detection device capable of responding to multiple wavelengths. The device consists of a PIN photodiode, a narrow-band optical filter and an optical filter replacement module. The photodiode is typically a TO46 package, and can be modified as needed. A PIN photodiode based on silicon, germanium or indium gallium arsenide may be selected depending on the target wavelength.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a detection device capable of responding to multiple wavelengths comprises a packaged PIN type photodiode, a narrow-band optical filter and an optical filter replacement module.

The PIN type photodiode is a silicon-based, germanium-based or indium gallium arsenide-based photodiode commonly used in the market;

the narrow-band filter has a diameter of 4.7mm-3.55mm and a thickness of 0.5-1mm;

the narrow-band filter is made of optical glass;

the narrow-band filter is a single-sided hard coating, and the half-width is 50nm-10nm.

The filter replacing module is a servo motor driving conversion device and controls the replacement of the filter through a trigger button.

The conversion device comprises an optical filter conversion disc and an optical filter pressing ring.

Wherein the servo motor and the PIN type photodiode are fixed on a special bracket by using AB glue, and the whole structure consists of a shell, a front cover plate and a rear cover plate.

A detection device capable of responding to multiple wavelengths is designed according to the following principle:

the common PN type photodiode has thinner potential barrier thickness and smaller photosensitivity, and the PIN type photodiode is permeated with an intrinsic semiconductor material with low concentration, namely an I layer, between PN junctions to increase the potential barrier thickness and improve the photosensitivity.

The commonly used PIN photodiodes can be divided into three types, namely a silicon-based PIN photodiode, a germanium-based PIN photodiode and an indium gallium arsenide-based PIN photodiode, the materials of the PIN-based PIN photodiode are different, the materials of the PIN-based photodiode are different from the materials of the PIN-based photodiode in different wavebands, the silicon-based response wavelength is 400nm-1100nm, the germanium-based response wavelength is 800nm-1650nm, and the indium gallium arsenide-based response wavelength is 1100nm-1700nm. The indium gallium arsenide base has the highest response speed and highest responsivity, and is also most widely applied.

The narrow band filter is subdivided from the band-pass filter and has the same definition as the band-pass filter, i.e. the filter allows the optical signal to pass in a specific wavelength band, while the optical signals on both sides deviating from the wavelength band are blocked, and the passband of the narrow band filter is relatively narrow, typically less than 5% of the value of the center wavelength.

The light with the specific wavelength to be detected is obtained through the narrow-band filter, and the light with the other wave bands is reflected, so that accurate response to different wavelengths is realized.

The utility model has the following advantages:

the narrow-band filter plate rotating disc is driven by the servo motor to rotate so as to replace the narrow-band filter plates on different hole sites, the light passing holes of the front cover plate and the receiving surface of the PIN type photodiode are coaxial and are relatively fixed in position, and the multi-wavelength laser can be tested through the position change of the narrow-band filter plate, so that the structure is simple and convenient, and the operation is convenient.

Drawings

FIG. 1 is an exploded view of a detection device that is responsive to multiple wavelengths;

FIG. 2 is a front perspective view of a detection device that is responsive to multiple wavelengths;

FIG. 3 is a rear perspective view of a detection device responsive to multiple wavelengths;

FIG. 4 is a schematic diagram of a filter replacement module and a bracket of a detection device that can respond to multiple wavelengths;

FIG. 5 is a rear partial view of a detection device that is responsive to multiple wavelengths;

fig. 6 is a front partial view of a detection device that is responsive to multiple wavelengths.

Reference numerals:

1. a front cover plate; 2. a housing; 3. a back cover plate; 4. a filter replacement module; 41. a filter plate conversion plate; 42. a filter mounting hole; 43. a filter pressing ring; 44. a shaft mounting hole; 5. a narrow band filter; 6. a servo motor; 7. a photodiode; 8. a bracket; 81. a semicircular bracket; 82. a plate-like connection structure; 83. a fixing plate; 84. a photodiode support; 85. a fixed bracket; 9. a light-transmitting hole; 10. and (5) a lead hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Example 1

As shown in fig. 1 to 3, a detection device capable of responding to a plurality of wavelengths includes a front cover plate 1, a housing 2, a rear cover plate 3, a filter changing module 4 arranged in the housing 2, a narrow band filter 5 arranged in the filter changing module 4, a servo motor 6 connected with the middle of the filter changing module 4, a photodiode 7 arranged at the rear of the filter changing module 4, a bracket 8 for fixing the photodiode 7, a light passing hole 9 arranged on the front cover plate 1 and a lead hole 10 arranged on the rear cover plate 3;

the shell 2 is of a hollow structure, and the narrow-band filter 5, the servo motor 6, the photodiode 7 and the bracket 8 are all arranged in the shell 2;

the number of the narrow-band filter plates 5 is at least two, the servo motor 6 drives the filter plate replacement module 4 to rotate and rotates the narrow-band filter plates 5 to the front end of the photodiodes 7, and the light through holes 9 are through holes arranged at the front ends of the photodiodes 7;

as shown in fig. 4 to 6, the filter changing module 4 includes a filter switching plate 41, at least two filter mounting holes 42 provided on the filter switching plate 41, a filter pressing ring 43 detachably provided in the filter mounting holes 42, and a rotation shaft mounting hole 44 provided in the center;

the filter plate conversion plate 41 is of a flat structure, the filter plate mounting hole 42 is a through hole, the filter plate pressing ring 43 is of a hollow structure, and the narrow-band filter plate 5 is fixed in the filter plate mounting hole 42 through the filter plate pressing ring 43;

the servo motor 6, the photodiode 7 and the bracket 8 are arranged at the rear side of the filter conversion disc 41;

the filter mounting holes 42 are symmetrically distributed with the rotating shaft mounting holes 44 as the center;

the rotating shaft mounting hole 44 is fixed with the rotating shaft of the servo motor 6 through AB glue;

the wave plate conversion plate 41 is of a circular plate-shaped structure, the filter mounting hole 42 and the rotating shaft mounting hole 44 are circular through holes, the filter pressing ring 43 is a circular rubber ring, and the distance from the center of the filter mounting hole 42 to the center of the rotating shaft mounting hole 44 is equal to the distance from the light passing hole 9 to the center of the rotating shaft mounting hole 44;

as shown in fig. 4 to 6, the bracket 8 includes a semicircular bracket 81 provided in the middle, plate-shaped connection structures 82 connected to both sides of the semicircular bracket, a fixing plate 83 fixed to the end of the plate-shaped connection structure 82, a photodiode support frame 84 provided at an upper portion of one side of the plate-shaped connection structure 82, and a fixing bracket 85 fixed to the upper portion of the photodiode support frame 84 to extend forward;

the fixing plate 83 is an arc plate fixed on the inner wall of the shell 2, and the main body of the servo motor 6 is fixed on the semicircular bracket 81;

the upper surface of the photodiode support 84 is arc-shaped, the fixed support 85 is of a hollow cylindrical structure, and the photodiode 7 is fixed in the fixed support 85;

the front cover plate 1, the shell 2 and the rear cover plate 3 are bonded into a closed cylinder through AB glue, the front cover plate 1 is of a circular plate-shaped structure, and the rear cover plate 3 is of a circular cover plate;

the photodiode 7 is a PIN photodiode;

the narrow-band filter 5 is optical glass with single-sided coating;

photodiode 7 is a TO46 packaged indium gallium arsenide based photodiode;

the lead hole 10 is a through hole.

Example 2

As shown in fig. 1-3, a detection device capable of responding to multiple wavelengths includes a packaged PIN photodiode 7 and a narrowband filter 5.

The PIN photodiode 7 is a TO46 packaged indium gallium arsenide based photodiode;

the narrow-band filter 5 is 4.7mm in diameter and 1mm in thickness;

the narrow-band filter 5 is made of optical glass;

the narrow-band filter 5 is a single-sided hard coating, and has a half-width of 40nm.

The semiconductor lasers are 980nm and 1064nm multi-wavelength lasers.

The filter replacing module 4 is a servo motor driving conversion device, and the replacement of the filter is controlled through a trigger button.

The conversion device comprises a filter conversion disc 41 and a filter pressing ring 43.

Wherein the servo motor 6 and the PIN type photodiode 7 are fixed on a special bracket 8 by using AB glue, and the whole structure consists of a shell 2, a front cover plate 1 and a rear cover plate 3.

The 980nm and 1064nm narrow-band filters 5 are fixed in the two different filter conversion disc empty spaces 42 by using the filter pressing rings 43, the positions of the PIN photodiodes 7 are fixed, and the narrow-band filters 5 in front of the PIN photodiodes 7 are replaced by controlling the rotating angle of the servo motor 6, so that the effect of responding to a plurality of wavelengths is achieved.

The preparation method of examples 1-2 is: firstly, a narrow-band optical filter 5 is placed in a vacancy 42 of a filter plate conversion disc, and then an optical filter pressing ring 43 is screwed into the vacancy to fasten the optical filter 5 in a medium-pressure manner; the servo motor 6 and the PIN type photodiode 7 are fixed on the corresponding positions of the bracket 8 by using AB glue, and then a rotating shaft of the servo motor 6 is inserted into a rotating shaft hole 44 in the middle of the conversion disc 41 and is fixed by using AB glue; inserting the fixed structure into the shell 2, aligning the light through hole 9 of the front cover plate 1 with the receiving surface of the PIN photodiode 7, and fixing the front cover plate 1 and the shell 2 by using AB glue; the leads of the PIN photodiode 7 and the servo motor 6 are penetrated out of the lead holes 10 of the back cover plate 3, and the back cover plate 3 is covered and fixed by AB glue.

The methods of use of examples 1-2 were:

the rotating shaft of the servo motor 6 drives the filter turntable 41 to rotate so as to replace the narrow-band filters 5 on different hole sites, and the light passing holes 9 of the front cover plate 1 and the receiving surface of the PIN type photodiode 7 are coaxial and are relatively fixed in position.

After the laser is started, the response values of the photodiodes to the two wavelengths can be detected through a universal meter.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. A detection device responsive to a plurality of wavelengths, characterized by: the filter comprises a front cover plate (1), a shell (2) and a rear cover plate (3) which are sequentially arranged from front to back, a filter changing module (4) arranged in the shell (2), a narrow-band filter (5) arranged in the filter changing module (4), a servo motor (6) connected with the middle part of the filter changing module (4), a photodiode (7) arranged at the rear part of the filter changing module (4), a bracket (8) for fixing the photodiode (7) and a light-transmitting hole (9) arranged on the front cover plate (1);

the shell (2) is of a hollow structure, and the narrow-band filter (5), the servo motor (6), the photodiode (7) and the bracket (8) are all arranged in the shell (2);

the number of the narrow-band filter plates (5) is at least two, the servo motor (6) drives the filter plate replacement module (4) to rotate and enable the narrow-band filter plates (5) to rotate to the front end of the photodiode (7), and the light transmission holes (9) are through holes formed in the front end of the photodiode (7).

2. A device for detecting a plurality of wavelengths according to claim 1, wherein: the filter changing module (4) comprises a filter switching disc (41), at least two filter mounting holes (42) arranged on the filter switching disc (41) and a filter pressing ring (43) detachably arranged in the filter mounting holes (42);

the filter plate conversion disc (41) is of a flat structure, the filter plate mounting hole (42) is a through hole, the filter plate pressing ring (43) is of a hollow structure, and the narrow-band filter plate (5) is fixed in the filter plate mounting hole (42) through the filter plate pressing ring (43);

the servo motor (6), the photodiode (7) and the bracket (8) are all arranged at the rear side of the filter conversion disc (41).

3. A device for detecting a plurality of wavelengths according to claim 2, wherein: the filter replacing module (4) further comprises a rotating shaft mounting hole (44) arranged in the center, and the filter mounting holes (42) are symmetrically distributed by taking the rotating shaft mounting hole (44) as the center.

4. A detection apparatus responsive to a plurality of wavelengths as recited in claim 3, wherein: the rotating shaft mounting hole (44) is fixed with the rotating shaft of the servo motor (6) through AB glue.

5. A detection apparatus responsive to a plurality of wavelengths as recited in claim 3, wherein: the filter conversion disc (41) is of a circular plate-shaped structure, the filter mounting hole (42) and the rotating shaft mounting hole (44) are circular through holes, the filter pressing ring (43) is a circular rubber ring, and the distance from the center of the filter mounting hole (42) to the center of the rotating shaft mounting hole (44) is equal to the distance from the light-transmitting hole (9) to the center of the rotating shaft mounting hole (44).

6. A device for detecting a plurality of wavelengths according to claim 1, wherein: the bracket (8) comprises a semicircular bracket (81) arranged in the middle, plate-shaped connecting structures (82) connected to two sides of the semicircular bracket, a fixed plate (83) fixed with the tail end of the plate-shaped connecting structures (82) and a photodiode supporting frame (84) arranged at the upper part of one side of the plate-shaped connecting structures (82);

the fixing plate (83) is an arc plate fixed on the inner wall of the shell (2), and the main body of the servo motor (6) is fixed on the semicircular bracket (81).

7. A device for detecting multiple wavelengths in accordance with claim 6, wherein: the support (8) further comprises a fixing support (85) which is fixed on the upper portion of the photodiode support frame (84) and extends forwards, the upper surface of the photodiode support frame (84) is arc-shaped, the fixing support (85) is of a hollow cylindrical structure, and the photodiode (7) is fixed in the fixing support (85).

8. A device for detecting a plurality of wavelengths according to claim 1, wherein: the front cover plate (1), the shell (2) and the rear cover plate (3) are bonded into a closed cylinder through AB glue, the front cover plate (1) is of a circular plate-shaped structure, and the rear cover plate (3) is of a circular cover plate;

the photodiode (7) is a PIN type photodiode;

the narrow-band filter (5) is optical glass with single-sided coating.

9. A device for detecting a plurality of wavelengths according to claim 1, wherein: the photodiode (7) is a TO46 packaged indium gallium arsenide based photodiode.

10. A device for detecting a plurality of wavelengths according to claim 1, wherein: the novel back cover plate further comprises a lead hole (10) arranged on the back cover plate (3), and the lead hole (10) is a through hole.