CN213210541U

CN213210541U - Optical fiber light-emitting monitoring device

Info

Publication number: CN213210541U
Application number: CN202021840306.5U
Authority: CN
Inventors: 邓俊杰; 李莎
Original assignee: Wuhan Raycus Fiber Laser Technologies Co Ltd
Current assignee: Wuhan Raycus Fiber Laser Technologies Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-05-14
Anticipated expiration: 2030-08-28

Abstract

The embodiment of the utility model provides an it detects technical field to relate to laser, provides an optic fibre light-emitting monitoring devices. The optical fiber light-emitting monitoring device comprises a shell and a photodiode, wherein a positioning groove and a cavity are formed in the shell, the positioning groove penetrates through the cavity, a light-gathering surface is arranged in the cavity, a first through hole is formed in the cavity, and the photodiode is installed in the first through hole to receive an optical signal in the cavity. The embodiment of the utility model provides an optic fibre light-emitting monitoring devices through set up the condensing surface in detecting the cavity, assembles the weak light reinforcing, increases optical signal's energy density to effectively avoid because the light intensity leads to the problem of mistake protection too weak, can satisfy the optical monitoring protection demand of fiber laser.

Description

Optical fiber light-emitting monitoring device

Technical Field

The utility model relates to a laser detection technical field especially relates to an optic fibre light-emitting monitoring devices.

Background

The working state of an optical module or an optical device is generally monitored by monitoring the light intensity of an optical fiber of the optical module or the optical device through a photodiode. The monitoring method comprises the steps that a light beam transmitted in an optical fiber is detected through a photodiode, the photodiode converts a monitored optical signal into a current signal, the light intensity of the signal light is obtained through calculation, the current working state of an optical module or an optical device can be judged according to the light intensity, and then a control system judges whether to execute protection according to the working state. However, when the light output of the low-light fiber is monitored by the photodiode, the light intensity is too low, and thus the light is easily mistakenly protected.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an optic fibre light-emitting monitoring devices for when solving among the prior art and utilize photodiode to monitor the light-emitting of low light optic fibre, there is the condition of mistake protection easily.

An embodiment of the utility model provides an optic fibre light-emitting monitoring devices, including casing and photodiode, be equipped with constant head tank and cavity in the casing, the constant head tank is worn to locate the cavity, be equipped with the light gathering face in the cavity, first through-hole has been seted up to the cavity, photodiode install in first through-hole is in order to receive the light signal that the light gathering face assembles.

According to the utility model discloses an optic fibre light-emitting monitoring devices of embodiment, the spotlight face is the arc concave surface, the arc concave surface construct in the inner wall of cavity, the arc concave surface with first through-hole is relative.

According to the utility model discloses an optic fibre light-emitting monitoring devices, the outer wall of casing is equipped with the heavy groove, photodiode's tube socket holding in the heavy groove, the tube socket edge structure has the direction card, the appearance of heavy groove with the appearance looks adaptation of tube socket.

According to the utility model discloses an optic fibre light-emitting monitoring devices still includes the briquetting, the briquetting pressure is located photodiode's tube socket. According to the utility model discloses an optic fibre light-emitting monitoring devices, the casing includes base and apron, the constant head tank is seted up in the base, apron fixed mounting in the notch side of base.

According to the utility model discloses an optic fibre light-emitting monitoring devices, positioning slot position U type groove, the center pin of the arc tank bottom in U type groove with photodiode's lens optical axis is located same height.

According to the utility model discloses an optic fibre light-emitting monitoring devices still includes the processing unit, the processing unit with the photodiode electricity is connected.

According to the utility model discloses an optic fibre light-emitting monitoring devices, be equipped with the pilot hole on the casing, the pilot hole be used for with the casing is installed in the optical module of laser instrument.

According to the utility model discloses an optic fibre light-emitting monitoring devices of embodiment, cavity inner wall is provided with the gilt layer.

According to the utility model discloses an optic fibre light-emitting monitoring devices, the casing adopts oxygen-free copper to make.

The embodiment of the utility model provides an optic fibre light-emitting monitoring devices through set up the condensing surface in detecting the cavity, assembles the weak light reinforcing, increases optical signal's energy density to effectively avoid because the light intensity leads to the problem of mistake protection too weak, can satisfy the optical monitoring protection demand of fiber laser.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an optical fiber light emission monitoring device according to an embodiment of the present invention;

fig. 2 is a top view of an optical fiber light-emitting monitoring device according to an embodiment of the present invention;

reference numerals:

1. a base; 101. a second screw hole; 102. a first through hole; 103. sinking a groove; 104. a light-condensing surface; 105. positioning a groove; 106. a third assembly hole; 107. a first screw hole; 108. mounting blocks; 2. a cover plate; 201. a second assembly hole; 3. briquetting; 301. a first assembly hole; 302. a second through hole; 4. a photodiode; 401. pipe legs; 402. a pipe cap; 403. a direction card; 404. a lens; 405. a tube holder; 5. and (5) an optical fiber to be tested.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for clearly indicating the numbering of the product parts and do not represent any substantial difference unless explicitly stated or limited otherwise. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The following describes an optical fiber light emission monitoring device according to an embodiment of the present invention with reference to fig. 1 and 2. As shown in fig. 1, the embodiment of the present invention provides an optical fiber light-emitting monitoring device, which is schematically illustrated in fig. 2, the present invention provides a top view of the optical fiber light-emitting monitoring device. The optical fiber light-emitting monitoring device comprises a shell and a photodiode 4, wherein a positioning groove 105 and a cavity are arranged in the shell, the positioning groove 105 penetrates through the cavity to place an optical fiber 5 to be tested, a light-gathering surface 104 is arranged in the cavity, a first through hole 102 is formed in the cavity, and the photodiode 4 is installed in the first through hole 102 to receive an optical signal gathered by the light-gathering surface. The photosensitive surface of the photodiode 4 is placed at the focus of the light-gathering surface 104, so that the light-gathering surface 104 gathers more optical signals to the photodiode 4. The first through hole 102 has an outer dimension adapted to the cap 402 of the photodiode 4. The shell is made of oxygen-free copper, is good in heat conductivity and processability, and can quickly absorb laser heat and release the laser heat to the outside.

When the optical fiber positioning device is used, the optical fiber 5 to be measured is placed in the positioning groove 105 and is straightened, glue is injected at two ends of the positioning groove 105, and the optical fiber 5 to be measured is fixed in the positioning groove 105. The leg 401 of the photodiode 4 is electrically connected to the signal processing unit. The laser beam is transmitted through the optical fiber, and the emitted light beam is reflected in the cavity and is converged and enhanced by the light-gathering surface 104, so that the photodiode 4 can monitor the optical signal. In the process, part of the heat is absorbed by the inner cavity, passes through the lens 404 of the photodiode 4, is converted into photocurrent, is transmitted to the signal processing unit through the connecting cable by the tube leg 401, and the light intensity of the signal light is calculated by the signal processing unit. The staff can judge the working condition of the optical module or the optical device according to the light intensity information.

The embodiment of the utility model provides an optic fibre light-emitting monitoring devices utilizes photodiode 4 to survey the optic fibre conduction light beam that is located the detection cavity of casing, through set up the condensing surface 104 in detecting the cavity, assembles the weak light reinforcing, increases optical signal's energy density to effectively avoid because the light intensity is too weak and lead to the problem of mistake protection, can satisfy the optical monitoring protection demand of fiber laser.

The light-gathering surface 104 may be an arc-shaped reflective mirror additionally disposed in the cavity, or an arc-shaped reflective surface configured on an inner wall of the cavity, such as a spherical concave surface or an arc-shaped concave surface, as shown in fig. 1, the arc-shaped concave surface is configured on the inner wall of the cavity, and the arc-shaped concave surface is opposite to the first through hole 102, so that light is gathered toward the photosensitive surface of the photodiode 4. Further, the inner wall of the cavity is plated with gold integrally, so that mirror reflection of light beams is facilitated.

In order to facilitate the positioning of the photodiode 4 during the production and to facilitate the production fool-proofing, in this embodiment, the outer wall of the housing is provided with a sinking groove 103, the stem 405 of the photodiode 4 is accommodated in the sinking groove 103, the edge of the stem 405 is configured with a direction card 403, and the shape of the sinking groove 103 is matched with the shape of the stem 405. Specifically, the sink 103 is disposed at the position of the first through hole 102, and the stem 405 of the photodiode 4 is accommodated in the sink 103 after the photodiode is mounted in the first through hole 102. The direction card 403 is a structure formed on the edge of the socket 405 and protruding in the radial direction. Since the shape of the sinking groove 103 is matched with the shape of the socket 405, the socket 405 with the direction card 403 is limited to rotate after being installed in the sinking groove 103, so as to fix the positive and negative directions of the photodiode 4 after being installed.

Further, the embodiment of the utility model provides an optic fibre light-emitting monitoring devices still includes briquetting 3, and the tube socket 405 of photodiode 4 is located to 3 pressures of briquetting to realize photodiode 4 fixed in first through-hole 102, prevent that photodiode 4 from rocking and influencing the monitoring result at first through-hole 102. A second through hole 302 is formed in the pressing block 3 at a position corresponding to the first through hole 102, and a tube leg 401 of the photodiode 4 penetrates through the second through hole 302. Be equipped with first screw 107 on the casing, the briquetting 3 is equipped with first pilot hole 301 corresponding to the position of first screw 107, and the connection can be dismantled through the bolt realization of installing in first screw 107 and first pilot hole 301 to briquetting 3 and casing. The pressing block 3 is manufactured by POM processing, and is low in cost and light.

In addition to the above-mentioned embodiments, the housing is provided with a third mounting hole 106, the third mounting hole 106 is used for mounting the housing in the optical module of the laser, for example, a connecting member such as a connecting bolt is inserted into the third mounting hole 106, and the housing is mounted in the optical module of the laser through the connecting member. The assembled unit has a specification size of 27X 10X 8 mm.

In order to facilitate the detachment, maintenance and replacement, on the basis of the above embodiment, the housing includes the base 1 and the cover plate 2, the positioning groove 105 is opened on the base 1, and the cover plate 2 is fixedly installed on the notch side of the base 1. The cavity can be completely arranged in the base 1, one part of the cavity can be arranged in the base 1, the other part of the cavity is arranged in the cover plate 2, the base 1 and the cover plate 2 are connected to form a closed detection cavity, the light beam of the monitoring point is wrapped in the cavity, and the fact that the lens 404 of the photodiode 4 receives the light beam of the external environment to influence the actual monitoring effect is avoided. As shown in fig. 1, the cavity is located in the base 1, a second screw hole 101 is provided on an assembly surface of the base 1 and the cover plate 2, a second assembly hole 201 is provided on a position of the cover plate corresponding to the second screw hole 101, and the base 1 and the cover plate 2 are detachably connected by bolts installed in the second screw hole 101 and the second assembly hole 201. For convenience of assembly, the side wall of the base 1 is convexly provided with a mounting block 108, and the third assembly hole 106 is arranged on the mounting block 108.

Further, the positioning groove 105 is a U-shaped groove, and a central axis of an arc groove bottom of the U-shaped groove is located at the same height as an optical axis of the lens 404 of the photodiode 4. After the photodiode 4 is installed in the first through hole 102, the optical axis of the lens 404 of the photodiode 4 coincides with the central axis of the first through hole 102, and at this time, the central axis of the first through hole 102 and the central axis of the arc-shaped groove bottom of the U-shaped groove are located at the same height. Further, the optical axis of the lens 404 is perpendicular to the central axis of the arc-shaped groove bottom of the U-shaped groove, so that the photodiode 4 can acquire optical signals more conveniently, and the optical fiber light-emitting condition can be monitored better. The groove width of the U-shaped groove is matched with the diameter of the optical fiber 5 to be measured, corresponding design changes can be made according to the fiber core of the optical fiber in actual use, and the distance between the central shaft of the U-shaped groove and the groove opening is a constant value.

Further, the embodiment of the utility model provides an optic fibre light-emitting monitoring devices still includes the processing unit, and the processing unit is connected with 4 electricity of photodiode for the photocurrent that reads 4 production of photodiode acquires the light intensity of signal light. Specifically, the photodiode 4 converts the received signal light into a photocurrent, which can be read by a processing unit connected to the photodiode 4 and calculated to obtain the light intensity of the signal light received by the photodiode 4. After the processing unit obtains the light intensity of the signal light, the light intensity can be displayed through the display unit to inform workers of monitoring conditions, and the calculated light intensity of the signal light can be compared with a preset light intensity reference to judge whether protection actions need to be executed or not.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides an optic fibre light-emitting monitoring devices, its characterized in that, includes casing and photodiode, be equipped with constant head tank and cavity in the casing, the constant head tank is worn to locate the cavity is in order to lay the optic fibre that awaits measuring, be equipped with the light gathering face in the cavity, first through-hole has been seted up to the cavity, photodiode install in first through-hole is in order to receive the light signal that the light gathering face assembles.

2. The optical fiber light-emitting monitoring device according to claim 1, wherein the light-gathering surface is an arc-shaped concave surface, the arc-shaped concave surface is configured on the inner wall of the cavity, and the arc-shaped concave surface is opposite to the first through hole.

3. The optical fiber light-emitting monitoring device according to claim 1, wherein the outer wall of the housing is provided with a sunken groove, the tube seat of the photodiode is accommodated in the sunken groove, the edge of the tube seat is configured with a direction card, and the shape of the sunken groove is matched with the shape of the tube seat.

4. The optical fiber light-emitting monitoring device according to claim 3, further comprising a pressing block, wherein the pressing block is pressed on a tube seat of the photodiode.

5. The optical fiber light-emitting monitoring device according to any one of claims 1 to 4, wherein the housing includes a base and a cover plate, the positioning groove is opened on the base, and the cover plate is fixedly mounted on the notch side of the base.

6. The optical fiber light-emitting monitoring device according to any one of claims 1 to 4, wherein the positioning groove is a U-shaped groove, and a central axis of an arc-shaped groove bottom of the U-shaped groove is located at the same height as an optical axis of a lens of the photodiode.

7. The optical fiber light-emitting monitoring device according to any one of claims 1 to 4, further comprising a processing unit electrically connected to the photodiode.

8. An optical fiber light-emitting monitoring device according to any one of claims 1 to 4, wherein the housing is provided with a mounting hole, and the mounting hole is used for mounting the housing in an optical module of a laser.

9. The optical fiber light-emitting monitoring device according to any one of claims 1 to 4, wherein a gold-plated layer is disposed on an inner wall of the cavity.

10. An optical fiber light-emitting monitoring device according to any one of claims 1 to 4, wherein the housing is made of oxygen-free copper.