CN112946823A

CN112946823A - Structure of passive optical device for reducing light reflection

Info

Publication number: CN112946823A
Application number: CN202110138478.0A
Authority: CN
Inventors: 张瑞姣; 刘薇
Original assignee: North China University of Water Resources and Electric Power
Current assignee: North China University of Water Resources and Electric Power
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-06-11
Anticipated expiration: 2041-02-01
Also published as: CN112946823B

Abstract

The invention discloses a structure of a passive optical device for reducing light reflection, which relates to the technical field of optical fiber communication and comprises a shell, a magnetic ring, a first wedge angle piece, a second wedge angle piece and an optical rotation piece, wherein the magnetic ring is fixedly connected on the inner side wall of the shell and can be effectively conducted into a heat dissipation port through the through port when the heat generated by devices in the shell is low through the matching use of the heat dissipation port, a fixed sleeve, a sliding sleeve, a cover plate and heat dissipation holes, the heat dissipation port is dissipated out through a plurality of heat dissipation holes on the side wall of the cover plate, when the heat generated by the devices in the shell is high, the temperature in the heat dissipation port rises, so that the thrust generated by the expansion of the gas in the fixed sleeve is heated, the attraction between a first magnetic block on the side wall of the cover plate and a second magnetic block in the heat dissipation port is overcome, the cover plate is automatically jacked up, the port, the heat dissipation efficiency is stable.

Description

Structure of passive optical device for reducing light reflection

Technical Field

The invention relates to the technical field of optical fiber communication, in particular to a structural member of a passive optical device for reducing light reflection.

Background

In an optical communication system, signal light passes through a plurality of different optical interfaces during transmission from a light source to a receiver, and at each optical interface, reflection occurs to different degrees, and return light generated by the reflection is finally transmitted back to the light source along a light path. When the cumulative intensity of the return light reaches a certain degree, the light source is unstable to work, and the problems of frequency drift, amplitude change and the like are caused, so that the normal work of the whole system is influenced. In order to avoid the influence of the return light on devices such as the light source, the return light must be suppressed by an optical isolator to ensure the operating quality of the optical communication system. The optical isolator is a nonreciprocal passive optical device which has low insertion loss on forward transmission light and great attenuation on reverse transmission light and is used for inhibiting adverse effects of return light on a light source in an optical communication system, a semiconductor laser, an optical amplifier, an optical fiber laser and the like are very sensitive to reflected light from a connector, a welding point, a filter and the like, and light reflected by an optical fiber echo can be well isolated by the optical isolator in optical fiber communication;

in the prior art, the power of a common optical isolator is generally low, the design and the manufacture of the optical isolator also present some differences under the higher laser power, and a high-power device works under the higher power and is easier to heat compared with a low-power device, so that the performance of the device is seriously influenced by the thermal characteristics of materials and the heat dissipation design, effective measures must be taken to reduce the absorption of laser and effectively dissipate heat, and therefore, a structural member of a passive optical device for reducing light reflection is provided to solve the problems.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a structural member of a passive optical device for reducing light reflection.

In order to achieve the purpose, the invention adopts the following technical scheme:

the structure of the passive optical device for reducing light reflection comprises a shell, a magnetic ring, a first wedge angle piece, a second wedge angle piece and an optical rotation piece, wherein the magnetic ring is fixedly connected on the inner side wall of the shell, the first wedge angle piece, the second wedge angle piece and the optical rotation piece are respectively and fixedly installed in the magnetic ring, one end side wall of the shell is connected with an optical fiber input line in a penetrating way, the other end side wall of the shell is connected with an optical fiber output line in a penetrating way, the upper end side wall and the lower end side wall of the shell are respectively provided with a heat dissipation port, the inner side wall of the heat dissipation port is provided with two through ports in a penetrating way, the inner side wall of the heat dissipation port is fixedly connected with a fixed sleeve, the inner side wall of the fixed sleeve is provided with a sliding groove, the side wall of the sliding groove is hermetically and, run through on the lateral wall of apron and seted up a plurality of louvres, two first magnetic blocks of fixedly connected with on the lower extreme lateral wall of apron, two second magnetic blocks of fixedly connected with on the inside wall of thermovent, two piston tubes of fixedly connected with on the inside wall of thermovent, two the lower extreme lateral wall of piston tube all runs through and has seted up the exhaust hole, run through on the one end lateral wall of opening and seted up the exhaust chamber, the end in exhaust chamber extends to the exhaust hole department on the piston tube lateral wall that corresponds, two push rods of fixedly connected with on the lateral wall of apron, two the end of push rod extends to the inside of the piston tube that corresponds respectively, the terminal fixedly connected with slider of push rod, the inside wall sealing sliding connection of slider and piston tube.

Preferably, the magnetic ring is tightly attached to the inner side wall of the shell.

Preferably, the sliding sleeve is tightly attached to the side wall of the sliding groove.

Preferably, the fixing sleeve is filled with an easily expandable gas.

Preferably, the opposite faces of the first magnetic block and the corresponding second magnetic block are opposite in magnetism.

Preferably, the sliding block is tightly attached to the inner side wall of the piston tube.

Preferably, the interior of the piston tube is interconnected to the interior of the opposing vent chamber through a vent hole, and the interior of the vent chamber is interconnected to the interior of the opposing port.

Preferably, both ends are provided with the fixed knot of optic fibre on the lateral wall of casing.

Preferably, the inner wall of the housing is provided with a black coating.

The invention has the beneficial effects that: according to the invention, through the matching use among the shell, the through hole, the heat dissipation port, the fixed sleeve, the sliding sleeve, the cover plate and the heat dissipation holes, when the optical isolator is used, when the heat generated by devices inside the shell is low, the optical isolator can be effectively conducted into the heat dissipation port through the through hole, and is dissipated through the plurality of heat dissipation holes on the side wall of the cover plate of the heat dissipation port, when the heat generated by the devices inside the shell is high, the temperature inside the heat dissipation port rises, so that the thrust generated by the thermal expansion of the gas inside the fixed sleeve is generated, the attraction between the first magnetic block on the side wall of the cover plate and the second magnetic block inside the heat dissipation port is overcome, the cover plate is automatically jacked up, the port of the heat dissipation port is automatically opened, the ventilation area is automatically increased, so that;

through the magnetic force piece, the apron, the push rod, the slider, cooperation between piston pipe and the exhaust chamber is used, after the port of thermovent is opened, along with giving off of the inside heat of device, the reduction of the inside temperature of thermovent, make the interior gas cooling shrink of fixed cover, the mutual attraction effect of apron at the magnetic force piece, make the automatic port closure with the thermovent of apron, the inside air of in-process can compression piston pipe, outwards blow off the air from the exhaust chamber, can open the inside dust of thermovent with the port during entering into, outwards blow off simultaneously, realize dustproof effect, avoid the dust to accumulate in the thermovent and influence the thermal giving off of device, guarantee device normal use.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a view showing the unfolded state of the cover plate according to the present invention.

Fig. 3 is a schematic top view of the heat dissipation opening of the present invention.

Fig. 4 is a side view of the structure of the present invention.

Fig. 5 is an enlarged view of a portion a of the present invention.

Fig. 6 is an enlarged view of part B of the present invention.

Reference numbers in the figures: 1 casing, 2 optic fibre input lines, 3 light output line, 4 magnetic rings, 5 first wedge angle pieces, 6 second wedge angle pieces, 7 rotation pieces, 8 thermovents, 9 openings, 10 fixed cover, 11 spout, 12 sliding sleeves, 13 apron, 14 louvres, 15 first magnetic block, 16 piston tubes, 17 exhaust holes, 18 exhaust chamber, 19 push rods, 20 sliders, 21 second magnetic blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-6, a structure of a passive optical device for reducing light reflection includes a housing 1, a magnetic ring 4, a first wedge piece 5, a second wedge piece 6, and an optical rotation piece 7, wherein the magnetic ring 4 is fixedly connected to the inner side wall of the housing 1, the first wedge piece 5, the second wedge piece 6, and the optical rotation piece 7 are respectively and fixedly installed inside the magnetic ring 4, the magnetic ring 4 is tightly attached to the inner side wall of the housing 1 to prevent dust from entering the device, one end side wall of the housing 1 is connected to an optical fiber input line 2 in a penetrating manner, the other end side wall of the housing 1 is connected to an optical fiber output line 3 in a penetrating manner, both ends of the outer side wall of the housing 1 are respectively provided with an optical fiber fixing buckle to fix the optical fiber, the, the coating is a black nickel coating, has good extinction capability, can effectively absorb light reflected on a structure irradiated by the light, and avoids unstable performance of a laser caused by light reflection;

the side walls of the upper end and the lower end of the shell 1 are respectively provided with a heat dissipation hole 8, the inner side wall of the heat dissipation hole 8 is provided with two through holes 9 in a penetrating manner, the inner side wall of the heat dissipation hole 8 is fixedly connected with a fixed sleeve 10, the fixed sleeve 10 is filled with easily expandable gas (hydrogen, helium, nitrogen and the like), the inner side wall of the fixed sleeve 10 is provided with a chute 11, the side wall of the chute 11 is hermetically and slidably connected with a sliding sleeve 12, the sliding sleeve 12 is tightly attached to the side wall of the chute 11 to ensure the tightness of the gas, the side wall of the outer end part of the sliding sleeve 12 is fixedly connected with a cover plate 13, the side wall of the cover plate 13 is abutted to the side wall of the end part of the heat dissipation hole 8, and the;

two first magnetic blocks 15 are fixedly connected to the side wall of the lower end of the cover plate 13, two second magnetic blocks 21 are fixedly connected to the inner side wall of the heat dissipation port 8, the opposite surfaces of the first magnetic blocks 15 and the corresponding second magnetic blocks 21 are opposite in magnetism, two piston tubes 16 are fixedly connected to the inner side wall of the heat dissipation port 8, exhaust holes 17 are formed in the side walls of the lower ends of the two piston tubes 16, an exhaust cavity 18 is formed in the side wall of one end of the through port 9, the tail end of the exhaust cavity 18 extends to the exhaust hole 17 on the side wall of the corresponding piston tube 16, the interior of the piston tube 16 is communicated with the interior of the corresponding exhaust cavity 18 through the exhaust hole 17, the interior of the exhaust cavity 18 is communicated with the interior of the corresponding through port 9, two push rods 19 are fixedly connected to the side wall of the cover plate 13, the tail ends of the two push rods 19 extend to the interiors of the corresponding piston tubes 16 respectively, the sliding block 20 is connected with the inner side wall of the piston tube 16 in a sealing and sliding mode, the sliding block 20 is tightly attached to the inner side wall of the piston tube 16, the sliding block 20 is pushed through the push rod 19, air inside the piston tube 16 is compressed into the heat dissipation port 8, air blowing is carried out, dust in the heat dissipation port 8 can be blown out outwards, and the dust removal effect is achieved.

The working principle is as follows: when in use, light is input into the shell 1 through the optical fiber input line 2 and then output through the optical fiber output line 3 (the process is prior art and not described in detail again), the high-power optical isolator can generate a large amount of heat inside the shell 1, so that the temperature inside the shell 1 rises, when the heat generated inside the shell 1 is low in use, the heat can be transferred from the through hole 9 to the heat dissipation port 8 and then is dissipated outwards through the plurality of heat dissipation holes 14 on the side wall of the cover plate 13 on the side wall of the end portion of the heat dissipation port 8, so as to realize the heat dissipation function, and prevent dust from entering the heat dissipation port 8, when the heat generated inside the shell 1 is high, a large amount of heat is directly dissipated into the heat dissipation port 8 through the through hole 9, the heat dissipation holes 14 on the side wall of the cover plate 13 cannot effectively dissipate the heat quickly, the heat is accumulated in the heat dissipation port 8, so that the temperature inside of, the sliding sleeve 12 is pushed to slide outwards in the fixed sleeve 10 to push the cover plate 13, and when the force generated by gas expansion is greater than the attraction force between the second magnetic block 21 and the first magnetic block 15 in the heat dissipation port 8 (the cover plate 13, the first magnetic block 15, the push rod 19 and the slide block 20 are light, and the self-gravity of the cover plate 13, the first magnetic block 15, the push rod 19 and the slide block 20 is not considered), the cover plate 13 is jacked up, so that the port of the heat dissipation port 8 is automatically opened, the ventilation area of the heat dissipation port 8 is increased, the heat in the heat dissipation port 8 can be quickly dissipated, effective heat dissipation is realized, and the overhigh temperature in the shell 1 is avoided;

after the cover plate 13 is jacked up, because the port of the heat dissipation port 8 is opened, the ventilation area is increased, dust is prevented from entering the heat dissipation port 8, in order to prevent the dust from accumulating in the heat dissipation port 8, along with the rapid heat dissipation or after the use of the device is finished, the temperature in the heat dissipation port 8 is reduced, so that the gas in the fixed sleeve 10 is cooled and contracted, the sliding sleeve 12 slides in the fixed sleeve 10, the first magnetic block 15 on the side wall of the cover plate 13 is close to the second magnetic block 21 in the heat dissipation port 8, so that the attraction between the two is increased, when the distance between the first magnetic block 15 and the second magnetic block 21 is relatively low, the cover plate 13 rapidly seals the heat dissipation port 8 under the action of the attraction force, in the process, the push rod 19 on the side wall of the cover plate 13 synchronously moves in the heat dissipation port 8 along with the cover plate 13, the slide block 20 in the piston tube 16 is pushed, so, and the air inside the piston tube 16 is discharged into the air discharge cavity 18 only through the air discharge hole 17, the rapid compression of the air inside the piston tube 16 can generate an air blowing effect, the air is blown out into the through hole 9 through the tail end of the air discharge cavity 18, and the dust entering the inside of the heat dissipation port 8 can be simultaneously blown out outwards, so that the dust inside the heat dissipation port 8 is prevented from being accumulated to influence the effective heat dissipation and the normal use of the device.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. Reduce light reflex's passive optical device's structure, including casing (1), magnetic ring (4), first wedge piece (5), second wedge piece (6), optical rotation piece (7), its characterized in that, magnetic ring (4) fixed connection is on the inside wall of casing (1), first wedge piece (5), second wedge piece (6), optical rotation piece (7) respectively fixed mounting in the inside of magnetic ring (4), the one end lateral wall through connection of casing (1) has optic fibre input line (2), the other end lateral wall through connection of casing (1) has optic fibre output line (3), all be provided with thermovent (8) on the upper and lower extreme lateral wall of casing (1), run through on the inside wall of thermovent (8) and seted up two openings (9), fixedly connected with fixed cover (10) on the inside wall of thermovent (8), the inner side wall of the fixed sleeve (10) is provided with a sliding groove (11), the side wall of the sliding groove (11) is hermetically and slidably connected with a sliding sleeve (12), the side wall of the outer end part of the sliding sleeve (12) is fixedly connected with a cover plate (13), the side wall of the cover plate (13) is abutted against the side wall of the end part of the heat dissipation port (8), the side wall of the cover plate (13) is provided with a plurality of heat dissipation holes (14) in a penetrating manner, the side wall of the lower end of the cover plate (13) is fixedly connected with two first magnetic blocks (15), the inner side wall of the heat dissipation port (8) is fixedly connected with two second magnetic blocks (21), the inner side wall of the heat dissipation port (8) is fixedly connected with two piston pipes (16), the side wall of the lower end of the two piston pipes (16) is provided with an exhaust hole (17), the terminal exhaust hole (17) department that extends to on the piston pipe (16) lateral wall that corresponds of exhaust chamber (18), two push rods (19) of fixedly connected with on the lateral wall of apron (13), two the terminal of push rod (19) extends to the inside of the piston pipe (16) that corresponds respectively, the terminal fixedly connected with slider (20) of push rod (19), the inside wall sealing sliding connection of slider (20) and piston pipe (16).

2. A structure for a passive optical device for reducing light reflection as claimed in claim 1, wherein the magnetic ring (4) is closely attached to the inner side wall of the housing (1).

3. A structure for a passive optical device for reducing light reflection according to claim 1, wherein the sliding sleeve (12) is closely attached to the side wall of the sliding groove (11).

4. A structure for a passive optical device reducing light reflection according to claim 1, characterized in that the pouch (10) is filled with an expandable gas.

5. A structure for a passive optical device for reducing light reflection, as claimed in claim 1, wherein the facing surfaces of the first and second blocks (15, 21) are magnetically opposite.

6. A structural member of a passive optical device for reducing light reflection according to claim 1, wherein the slider (20) is closely attached to an inner side wall of the piston tube (16).

7. A structural member of a passive optical device for reducing light reflection according to claim 1, wherein the interior of the piston tube (16) is interconnected with the interior of the opposite exhaust chamber (18) through an exhaust hole (17), and the interior of the exhaust chamber (18) is interconnected with the interior of the opposite port (9).

8. A structure of a passive optical device for reducing light reflection as claimed in claim 1, wherein the outer side wall of the housing (1) is provided with optical fiber fixing buttons at both ends.

9. A structure for a passive optical device reducing light reflection according to claim 1, characterized in that the inner walls of the housing (1) are provided with a black coating.