Optical power control module for laser safety

Abstract

The utility model belongs to the technical field of optical fiber communication, and discloses an optical power control module for laser safety, which comprises an optical fiber, CAN (Controller Area Network) interfaces arranged at two ends of the optical fiber, two groups of CAN interfaces respectively connected with the output end of a combiner and the input end of a wave separator, and an optical power reduction device erected on the optical fiber, the optical power reduction device comprises a structural block, a sealing cover, a circuit board and an optical filtering structure, the optical filtering structure comprises five groups of optical filters, five groups of optical filter fixing blocks, ten groups of mobile control devices and five groups of permanent magnets, each mobile control device comprises an electromagnetic fixing block, an iron core and a coil, and current generates a magnetic field through the coil wound on the iron core; the permanent magnet is pushed by the magnetic field to control the optical filter to move, the function of reducing the optical power is achieved, the structure design is compact and reasonable, the output optical power can be reduced, various reducing modes can be adjusted, and the device is small in size, good in portability, easy to use and very long in service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical fiber communication technical field, concretely is a kind of optical power control module for laser safety. BACKGROUND

[0002] In a kind of wavelength division multiplexing system, laser safety is realized, and first optical fiber and second optical fiber are arranged between first and second sites, whether the optical signal power transmitted to first site by second optical fiber is lost is judged, if optical power is lost, the transmitter output power of first site is reduced or closed or by a kind of control equipment reduces and closes the optical power output to first optical fiber by first site.

[0003] In this laser safety method, a control device is required to control the reduction of optical power, the existing optical power reduction device does not have adjustment capability, and can only reduce or reduce the optical power according to the preset coefficient, if the above system uses such device, it is only suitable for single power optical safety transmission, and has no practical significance, and devices such as optical attenuator can be set before the receiving device to protect the safety of the receiving device, so a control module capable of adjusting different modes and having multiple optical power reduction schemes is required. SUMMARY

[0004] (I) Technical problem solved

[0005] In view of the deficiencies of the prior art, the utility model provides an optical power control module for laser safety to solve the problem of requiring a device to control the adjustable reduction of optical power as proposed in the background art.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an optical power control module for laser safety, comprising an optical fiber, a CAN interface is installed at both ends of the optical fiber, two groups of CAN interfaces are connected to the output end of the first combiner and the input end of the waveguide, an optical power reduction device is arranged on the optical fiber, and the optical power reduction device comprises a structure block, a cover, a circuit board and a filter structure.

[0008] Preferably, the filter structure comprises five groups of filters, five groups of filter fixing blocks, ten groups of movement control devices, five groups of permanent magnets and two groups of fastening rings, the filters are connected with permanent magnets on one side, the filters and permanent magnets are installed in the filter fixing blocks, and the movement control devices are arranged on the upper and lower sides of the filter fixing blocks.

[0009] Preferably, the filter fixing block is provided with a through inner light transmission hole, the filter fixing block is provided with a through filter placement slot and a magnet slot corresponding to the filter and the permanent magnet, and the filter and the permanent magnet are slidably connected in the filter placement slot and the magnet slot.

[0010] Preferably, the movement control device comprises an electromagnetic fixing block, an iron core and a coil, the electromagnetic fixing block is provided with an electromagnetic placement slot corresponding to the magnet slot, the iron core is arranged in the electromagnetic placement slot, and the coil is wound on the iron core; and the iron core and the coil are arranged above and below the magnet slot outside the filter fixing block.

[0011] Preferably, the structure block is provided with a mounting slot corresponding to the filter structure, the mounting slot is provided with a fastening ring sliding groove corresponding to the fastening ring on the upper and lower sides, the fastening ring is slidably connected in the fastening ring sliding groove, the filter structure is arranged in the mounting slot, and the structure block is provided with an outer light transmission hole corresponding to the inner light transmission hole.

[0012] Preferably, the circuit board is electrically connected with ten groups of coils, and the circuit board is provided with electronic components and circuit structures for controlling the opening and closing of the ten groups of coils.

[0013] (Three) beneficial effects

[0014] Compared with the prior art, the utility model provides a light power control module for laser safety, has the following

[0015] Beneficial effects:

[0016] 1、 the light power control module for laser safety, set filter structure, through control different number, model's filter shield light source, can reduce the light power of output, and can adjust has multiple reduction mode, this device is small, good portability, easy to use, service life is very high.

[0017] 2、 set up coil and iron core, utilize electromagnetic principle, the current passes through the coil and produces the magnetic field, this magnetic field and permanent magnet cooperation can attract permanent magnet and filter to the electrified side, use magnetic control compared with mechanical structure can greatly reduce the volume, this device is small, good portability, easy to use.

[0018] 3、 every group filter is provided with two groups of movement control devices, although unilateral setting movement control device, change its inside current direction, make it have attraction and repulsion ability can realize filter up and down movement, but set two groups respectively place in both sides all adopt the mode of attraction, the direction of magnetic field generated in both sides is close to the direction of permanent magnet magnetic field, can prevent permanent magnet demagnetization, service life can greatly improve. ACCURACY OF DRAWINGS

[0019] Figure 1 It is the whole structure schematic view of the utility model.

[0020] Figure 2 It is the schematic view of the optical power reducing device of the utility model;

[0021] Figure 3 It is the schematic view of the filter structure of the utility model;

[0022] Figure 4 It is the schematic view of the filter fixing block and the filter of the utility model;

[0023] Figure 5 It is the schematic view of the moving control device of the utility model;

[0024] Figure 6 It is the schematic view of the filter structure of the utility model;

[0025] Figure 7 It is the schematic view of the structure block of the utility model.

[0026] In the drawing: 1, optical fiber; 2, CAN interface; 3, optical power reducing device; 4, structure block; 5, cover; 6, filter; 7, filter fixing block; 8, moving control device; 9, permanent magnet; 10, fastening ring; 11, inner light hole; 12, filter placing groove; 13, magnet groove; 14, electromagnetic fixing block; 15, electromagnetic placing groove; 16, iron core; 17, coil; 18, mounting groove; 19, fastening ring sliding groove; 20, outer light hole; 21, circuit board. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0028] Please refer to Figures 1-7 The utility model provides a technical scheme:

[0029] A kind of optical power control module for laser safety, including optical fiber 1, CAN interface 2 is installed at both ends of optical fiber 1, two groups of CAN interface 2 are connected respectively the output end of first combiner and the input end of waveguide, optical fiber 1 is erected with optical power reducing device 3, and optical power reducing device 3 includes structure block 4, cover 5, circuit board 21 and filter structure.The device filters light source by filter structure, reaches the function of reducing optical power, and can adjust control reduced optical power intensity, two groups of CAN interface 2 can be connected at will, and any end can be used as input end, without affecting use effect.

[0030] Further, the light filtering structure comprises five sets of light filters 6, five sets of light filter fixing blocks 7, ten sets of movement control devices 8, five sets of permanent magnets 9 and two sets of fastening rings 10. One side of the light filter 6 is connected with the permanent magnet 9. The light filter 6 and the permanent magnet 9 are both installed in the light filter fixing block 7. The movement control device 8 is arranged on the upper and lower sides of the light filter fixing block 7. The fastening ring 10 is arranged outside the movement control device 8. The light filter 6 is controlled to rise and block the inner light transmission hole 11 by the movement control device 8. Then the light passing through the inner light transmission hole 11 has loss attenuation, so as to achieve the function of reducing the optical power. Five sets of light filters 6 are arranged to recommend the use of different light transmittance filter combinations. For example, the light transmittance of the five sets of light filters 6 is 50%, 50%, 50%, 40% and 20% in turn. The final transmitted light intensity is 1% of the input light intensity when all the light filters 6 are controlled to block the inner light transmission hole 11. The output light intensity is 50% of the input light intensity when only 50% of the light filters are controlled to block the inner light transmission hole 11. The combination of multiple sets of light filters 6 can adjust different optical power reduction modes. It is convenient to use and has a very wide range of applications.

[0031] Further, the light filter fixing block 7 is provided with a through-type inner light transmission hole 11. The light filter fixing block 7 is provided with a through-type light filter placing groove 12 and a magnet groove 13 corresponding to the light filter 6 and the permanent magnet 9. The light filter 6 and the permanent magnet 9 are both slidingly connected in the light filter placing groove 12 and the magnet groove 13. The light filter 6 and the permanent magnet 9 can move up and down in the light filter placing groove 12 and the magnet groove 13. Specifically, the magnetic field is used to drive the light filter 6 to move by using the permanent magnet 9 as a power source.

[0032] Further, the movement control device 8 comprises an electromagnetic fixing block 14, an iron core 16 and a coil 17. The electromagnetic fixing block 14 is provided with an electromagnetic placing groove 15 corresponding to the magnet groove 13. The iron core 16 is installed in the electromagnetic placing groove 15. The coil 17 is wound on the iron core 16. The iron core 16 and the coil 17 are respectively arranged above and below the magnet groove 13 outside the light filter fixing block 7. When the coil 17 is connected with current, a magnetic field is generated at the electromagnetic placing groove 15 according to the electromagnetic principle. The magnetic field affects the permanent magnet 9, so as to attract the permanent magnet 9 and the light filter 6 to one side with current. If the light filter 6 needs to rise and block the inner light transmission hole 11, the coil 17 above is controlled to pass current. If the light filter 6 needs to descend, the coil 17 below is controlled to pass current. The iron core 16 is used to gather and strengthen the magnetic field strength.

[0033] Further, the structural block 4 is provided with an installation groove 18 corresponding to the light filtering structure, the installation groove 18 is provided with a fastening ring sliding groove 19 corresponding to the fastening ring 10 on the upper and lower sides, the fastening ring 10 is slidingly connected in the fastening ring sliding groove 19, the light filtering structure is installed in the installation groove 18, and the structural block 4 is provided with an outer light transmission hole 20 corresponding to the inner light transmission hole 11. When the device is installed, the light filtering piece fixing block 7 and the moving control device 8 can be combined, then the fastening ring 10 is sleeved outside the moving control device 8, and the whole is slid into the installation groove 18 along the vertical direction.

[0034] Further, the circuit board 21 is electrically connected with the ten groups of coils 17, and the circuit board 21 is provided with electronic components and circuit structures for controlling the opening and closing of the circuits of the ten groups of coils 17.

[0035] Working principle: when the device is used, the device is installed at the output end of the first combiner at the first station, and the other side of the device is connected to the second station waveguide splitter as the output end, and the other group of controller modules is installed at the output end of the second combiner, and the other group of controller modules is connected to the first waveguide splitter as the output end, the device is used to reduce or shut off the output power of all transmitters in the second station, and the reduction of the output optical power of the second station will inevitably lead to the loss of the continuity of the received optical power of the first station, so that the device reduces the optical power output by the first station to below the safe power value, wherein the device controls the opening and closing of the circuits of the ten groups of coils 17 in the moving control device 8 to drive the light filtering piece 6 to move to block or avoid the light transmission path, so as to realize the function of reducing or shutting off the optical power.

[0036] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A light power control module for laser safety, comprising an optical fiber (1), both ends of the optical fiber (1) are provided with CAN interfaces (2), two groups of CAN interfaces (2) are connected with the output end of a first combiner and the input end of a splitter respectively, characterized in that: The optical fiber (1) is arranged with an optical power reducing device (3), which comprises a structure block (4), a cover (5), a circuit board (21) and a filter structure.

2. An optical power control module for laser safety according to claim 1, characterized in that: The filter structure comprises five groups of filters (6), five groups of filter fixing blocks (7), ten groups of movement control devices (8), five groups of permanent magnets (9) and two groups of fastening rings (10), one side of the filter (6) is connected with the permanent magnet (9), the filter (6) and the permanent magnet (9) are both installed in the filter fixing block (7), the filter fixing block (7) is provided with the movement control device (8) on the upper and lower sides, and the movement control device (8) is provided with the fastening ring (10) on the outer side.

3. An optical power control module for laser safety according to claim 2, characterized in that: The filter fixing block (7) is provided with a through inner light hole (11), the filter fixing block (7) is provided with a through filter placing groove (12) and a magnet groove (13) corresponding to the filter (6) and the permanent magnet (9), and the filter (6) and the permanent magnet (9) are both slidingly connected in the filter placing groove (12) and the magnet groove (13).

4. An optical power control module for laser safety according to claim 3, characterized in that: The movement control device (8) comprises an electromagnetic fixing block (14), an iron core (16) and a coil (17), the electromagnetic fixing block (14) is provided with an electromagnetic placing groove (15) corresponding to the magnet groove (13), the iron core (16) is installed in the electromagnetic placing groove (15), the coil (17) is wound on the iron core (16), and the iron core (16) and the coil (17) are respectively arranged above and below the magnet groove (13) outside the filter fixing block (7).

5. An optical power control module for laser safety according to claim 1, characterized in that: The structure block (4) is provided with a mounting groove (18) corresponding to the filter structure, the mounting groove (18) is provided with fastening ring sliding grooves (19) corresponding to the fastening rings (10) on the upper and lower sides, the fastening ring (10) is slidingly connected in the fastening ring sliding groove (19), the filter structure is mounted in the mounting groove (18), and the structure block (4) is provided with an outer light hole (20) corresponding to the inner light hole (11).

6. An optical power control module for laser safety according to claim 5, characterized in that: The circuit board (21) is electrically connected with the ten groups of coils (17), and the circuit board (21) is provided with electronic components and circuit structures for controlling the circuit opening and closing of the ten groups of coils (17).

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