CN211741626U - Optical signal attenuator and optical signal transmission system - Google Patents
Optical signal attenuator and optical signal transmission system Download PDFInfo
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- CN211741626U CN211741626U CN202020444531.0U CN202020444531U CN211741626U CN 211741626 U CN211741626 U CN 211741626U CN 202020444531 U CN202020444531 U CN 202020444531U CN 211741626 U CN211741626 U CN 211741626U
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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Abstract
The utility model provides an optical signal attenuator and optical signal transmission system relates to the optical communication field. The optical signal attenuator includes: an optical signal channel provided with an accommodation space; an attenuating element, at least a portion of which is located in the receiving space to absorb a portion of the optical signal in the optical signal channel; the deformation element is connected with the attenuation element and can deform according to the temperature so as to enable the attenuation element to displace; the displacement direction of the attenuation element and the extension direction of the optical signal channel form a preset angle. The utility model discloses an optical signal attenuator's attenuation intensity can be along with temperature automatically regulated, and need not to consume the external energy. The utility model also provides an optical signal transmission system can confirm whether have the trouble or can measure the temperature of environment in the system.
Description
Technical Field
The utility model relates to an optical communication field especially relates to an optical signal attenuator and optical signal transmission system.
Background
An optical signal attenuator is one of important devices of an optical fiber communication system, and is mainly used for reducing or controlling an optical signal and realizing power equalization among different communication channels. In an optical signal transmission system, optical characteristics of each optical device change with changes in temperature, and it is necessary to adjust attenuation intensity of an optical signal attenuator according to the changes in temperature, where the attenuation intensity of the optical signal attenuator is a difference between intensity of an optical signal before passing through the optical signal attenuator and intensity of an optical signal after passing through the optical signal attenuator.
The relevant optical signal attenuator realizes the adjustment of the attenuation intensity of the optical signal attenuator through a temperature sensor and an actuator, and the optical signal attenuator needs to consume external energy.
SUMMERY OF THE UTILITY MODEL
The utility model provides an optical signal attenuator and optical signal transmission system to solve and how under the prerequisite that need not to consume the external energy, make optical signal attenuator's attenuation intensity along with the change automatically regulated's of temperature technical problem.
The embodiment of the utility model provides an optical signal attenuator, this optical signal attenuator includes: an optical signal channel provided with an accommodation space; an attenuating element, at least a portion of which is located in the accommodating space to absorb a portion of the optical signal in the optical signal channel; the deformation element is connected with the attenuation element and can deform according to temperature so as to enable the attenuation element to displace; the displacement direction of the attenuation element and the extension direction of the optical signal channel form a preset angle.
Further, the optical signal attenuator also comprises a fixing piece; along the extending direction of the deformation element, one end of the deformation element is fixedly connected with the fixing piece, and the other end of the deformation element is connected with the attenuation element; the extending direction of the deformation element and the extending direction of the optical signal channel form the preset angle.
Further, the optical signal attenuator further includes: a fixing member; the first connecting piece is connected with the fixing piece and the deformation element; the second connecting piece is connected with the fixing piece and the deformation element; the first connecting piece and the second connecting piece are arranged along the extending direction of the deformation element, and the position where the deformation element is connected with the attenuation element is located between the first connecting piece and the second connecting piece.
Further, the first connecting piece and the second connecting piece are separated by a preset distance along the extension direction of the deformation element.
Further, the deformation element comprises: a first metal sheet connected to the damping member and connected to the fixing member through the first connecting member and the second connecting member; and the second metal sheet is connected with the first metal sheet, and the thermal expansion coefficient of the second metal sheet is different from that of the first metal sheet.
Further, the optical signal attenuator further comprises a locking element; the first connecting piece is connected with the fixing piece in a sliding mode and connected with the deformation element in a sliding mode, the first connecting piece is connected with the locking element in a detachable mode to limit relative movement between the first connecting piece and the deformation element and relative movement between the first connecting piece and the fixing piece, and/or the second connecting piece is connected with the fixing piece in a sliding mode and connected with the deformation element in a sliding mode and connected with the locking element in a detachable mode to limit relative movement between the first connecting piece and the deformation element and relative movement between the first connecting piece and the fixing piece.
Further, the optical signal attenuator further includes: a mount connected to the shape changing element and the attenuating element.
Further, the optical signal path includes: a first collimator located on one side of the attenuating element; a second collimator is located on the other side of the attenuating element; the first collimator and the second collimator form the accommodating space therebetween.
Furthermore, antireflection films are arranged at the end parts of the first collimator and the second collimator.
The embodiment of the utility model provides a still provide an optical signal transmission system, this optical signal transmission system includes: the optical splitter is provided with a first signal output end and a second signal output end; the first optical fiber is connected with the first signal output end; the second optical fiber is connected with the second signal output end; an optical signal attenuator as described above disposed in the first optical fiber or the second optical fiber.
The embodiment of the utility model provides an optical signal attenuator, including the optical signal passageway that is provided with accommodation space, the deformation element that the part is arranged in the attenuation component of optical signal passageway and is connected with the attenuation component, deformation element drives the attenuation component and produces the displacement when the temperature changes to make the attenuation component account for the area of the cross section of optical signal passageway and change, thereby change the proportion that the decay optical signal accounts for in the total optical signal, and then adjust optical signal attenuator's attenuation intensity. Namely, the embodiment of the present invention utilizes the kinetic energy generated by the deformation element of the optical signal attenuator during the temperature variation, so that the attenuation intensity of the optical signal attenuator is automatically adjusted along with the temperature variation, and the external energy is not consumed.
Drawings
Fig. 1 is a schematic structural diagram of an optical signal attenuator according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another optical signal attenuator according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another optical signal attenuator according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another optical signal attenuator according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a first type of locking element in an optical signal attenuator according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second type of locking element in an optical signal attenuator according to an embodiment of the present invention;
fig. 7 is an assembly diagram of a mounting seat, a deformation element and an attenuation element in an optical signal attenuator according to an embodiment of the present invention;
fig. 8 is a schematic diagram illustrating an assembly of a first collimator, a second collimator and an attenuation element in an optical signal attenuator according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an optical signal transmission system according to an embodiment of the present invention;
fig. 10 is a graph illustrating a relationship between attenuation intensity and temperature of an optical signal attenuator in an optical signal transmission system according to an embodiment of the present invention.
Description of the reference numerals
10-optical signal path, 11-receiving space, 12-first collimator, 13-second collimator, 20-attenuation element, 30-deformation element, 31-first metal sheet, 32-second metal sheet, 40-fixing element, 50-first connecting element, 60-second connecting element, 70-locking element, 70A-locking element of first type, 71A-sleeve, 72A-base, 73A-deformation groove, 74A-clamping plate, 75A-locking hole, 70B-locking element of second type, 71B-mounting sleeve, 72B-base plate, 73B-threaded hole, 80-mounting base, 1-beam splitter, 1A-first signal output, 1B-second signal output, 2-first optical fiber, 3-second optical fiber, 4-optical signal attenuator.
Detailed Description
Various combinations of the specific features in the embodiments described in the detailed description may be made without contradiction, for example, different embodiments may be formed by different combinations of the specific features, and in order to avoid unnecessary repetition, various combinations of the specific features in the present invention are not separately described.
The optical signal attenuator in the following embodiments may be used in any optical fiber transmission system, for example, the optical signal attenuator may be used in a network optical signal transmission system, and may also be used in optical signal transmission of a control system in a short distance.
As shown in fig. 1, the optical signal attenuator includes: an optical signal channel 10, an attenuating element 20 and a shape changing element 30. The optical signal channel 10 is used for transmitting an optical signal, and the optical signal channel 10 may be any element that can transmit an optical signal, for example, an optical fiber in which an optical signal is transmitted; for example, the optical signal channel may include an optical signal transmitter and an optical signal receiver, and the optical signal may be transmitted from the optical signal transmitter and received by the optical signal receiver. An accommodation space 11 is provided in the optical signal channel 10, and the accommodation space 11 is used for accommodating the attenuation element 20, that is, the attenuation element 20 passes through the accommodation space 11 into the optical signal channel. The form of the accommodation space 11 is different according to the form of the optical signal channel 10, for example, the optical signal channel 10 is a transmission fiber provided with a slot, so that the accommodation space 11 is formed in the transmission fiber; for example, the optical signal path is an optical signal path including an optical signal transmitter and an optical signal receiver which are spaced apart by a predetermined distance, and an accommodating space 11 is formed between the optical signal transmitter and the optical signal receiver.
The attenuating element 20 is an element that can absorb optical signals, and at least a part of the attenuating element 20 is located in the accommodating space 11, i.e. at least a part of the attenuating element 20 is located in the optical signal channel 10 so as to absorb optical signals in the optical signal channel 10, thereby achieving attenuation of the optical signals. Specifically, the attenuation element 20 occupies at least a portion of the accommodating space 11, when the optical signal passes through the accommodating space 11, at least a portion of the optical signal passes through the attenuation element 20, and during the process that the portion of the optical signal passes through the attenuation element 20, a portion of the optical signal is absorbed by the attenuation element 20, so that the intensity of the portion of the optical signal is reduced, and the intensity of the optical signal after passing through the attenuation element 20 is reduced. Optionally, the attenuating element 20 is an optically polished neutral absorbing glass.
The deformation element 30 is an element that can be deformed according to temperature, that is, the deformation element 30 is a temperature sensitive element, and in a state where the temperature of the environment in which the deformation element 30 is located is changed, internal stress is generated in the deformation element 30 and deformation is generated by the internal stress. The deformation element 30 is connected to the attenuation element 20, so that in a state that the temperature of the environment where the deformation element 30 is located changes, the deformation element 30 drives the attenuation element 20 to displace, wherein a displacement direction of the attenuation element 30 and an extension direction of the optical signal channel 10 form a preset angle, and it should be noted that the preset angle is greater than 0 degree, that is, the displacement direction of the attenuation element 30 is not parallel to the extension direction of the optical signal channel 10. The principle of adjusting the attenuation intensity of the optical signal attenuator is exemplified below.
For convenience of explanation, a cross section perpendicular to the extending direction of the optical signal channel 10 is referred to as a cross section, the attenuation element 20 occupies at least a part of the cross section, and at least a part of the optical signal passes through the attenuation element 20 when the optical signal passes through the cross section, and for convenience of explanation, the part of the optical signal is hereinafter referred to as an attenuated optical signal. In the process of the attenuated optical signal passing through the attenuation element 20, the attenuation element 20 absorbs part of the attenuated optical signal, so that the intensity of the attenuated optical signal is reduced, and further the intensity of the optical signal passing through the optical signal attenuator is reduced, wherein the larger the area of the cross section occupied by the attenuation element 20 is, the larger the proportion of the attenuated optical signal in the total optical signal is, and the stronger the attenuation intensity of the optical signal attenuator is. Under the condition that the ambient temperature of the optical signal attenuator is changed, the deformation element 30 deforms, so that the attenuation element 20 displaces in a direction which is not parallel to the extending direction of the optical signal channel 10, the area of the cross section occupied by the attenuation element 20 is changed, the proportion of the attenuated optical signals to the total optical signals is changed, and the attenuation intensity of the optical signal attenuator is further changed, namely, the attenuation intensity of the optical signal attenuator is adjusted according to the temperature.
The embodiment of the utility model provides an optical signal attenuator, including the optical signal passageway that is provided with accommodation space, the part is arranged in the attenuation component of optical signal passageway and the deformation element who is connected with the attenuation component, deformation element drives the attenuation component and produces the displacement when the temperature changes, and make the attenuation component account for the area of the cross section of optical signal passageway and change, thereby change the proportion that the decay optical signal accounts for in the total optical signal, and then adjust optical signal attenuator's attenuation intensity, promptly, the kinetic energy that the deformation element of optical signal attenuator produced when utilizing the temperature change, the attenuation intensity that makes optical signal attenuator is along with the change and the automatically regulated of temperature, and need not to consume external energy.
In some embodiments, as shown in FIG. 2, the optical signal attenuator further includes a securing member 40. Along the extending direction of the shape-changing element 30 (i.e. the direction in which the size of the shape-changing element 30 is the longest), one end of the shape-changing element 30 is fixedly connected to the fixing member 40, and the other end of the shape-changing element 30 is connected to the attenuating element 20, when the temperature changes, the shape-changing element 30 drives the attenuating element 20 to move along the extending direction of the shape-changing element 20, wherein the extending direction of the shape-changing element 30 and the extending direction of the optical signal channel 10 form a preset angle, i.e. the extending direction of the shape-changing element 30 is not perpendicular to the extending direction of the optical signal channel 10, so that the attenuating element 20 is displaced along the extending direction which is not perpendicular to the optical signal channel 10, the area of the cross section of the optical signal channel 10 occupied by the attenuating element 20 is changed, and the attenuation intensity of the optical signal attenuator is further changed, i.
In other embodiments, as shown in FIG. 3, the optical signal attenuator further comprises: a fixing member 40, a first connecting member 50 and a second connecting member 60. The first connecting member 50 is connected to the fixing member 40 and connected to the shape-changing member 30, that is, the shape-changing member 30 is connected to the fixing member 40 through the first connecting member 50; the second connecting member 60 is connected to the fixing member 40 and to the shape-changing element 30, i.e., the shape-changing element 30 is also connected to the fixing member 40 through the second connecting member 60. The first and second connectors 50 and 60 are arranged along the extension direction of the shape-changing element 30, and the position of the shape-changing element 30 connected to the damping element 20 is located between the first and second connectors 50 and 60, i.e. the damping element 20 is located between the first and second connectors 50 and 60 along the extension direction of the shape-changing element 30. When the temperature changes, the deformation element 30 located between the first connector 50 and the second connector 60 is bent, so that the attenuation element 20 is displaced, wherein when the deformation element 30 is bent, the displacement of the position where the deformation element 30 is connected with the attenuation element 20 is not parallel to the extending direction of the optical signal channel 10, so that the attenuation element 20 is displaced not parallel to the extending direction of the optical signal channel 10, and the area of the attenuation element occupying the cross section of the optical signal channel is changed, so that the proportion of the attenuated optical signal occupying the total optical signal is changed, and the attenuation intensity of the optical signal attenuator is adjusted.
In some embodiments, as shown in fig. 3, the first connecting element 50 and the second connecting element 60 are spaced apart from each other by a predetermined distance along the extending direction of the shape-changing element 30, so that the shape-changing element 30 can be bent unstably under the action of the compressive stress, and the attenuation element 20 is displaced by the bending of the shape-changing element, thereby adjusting the attenuation intensity of the optical signal attenuator. The minimum distance between the first connecting member 50 and the second connecting member is determined according to the adjustment accuracy of the attenuation intensity of the optical signal attenuator, and specifically, the minimum compressive stress P is determined according to the adjustment accuracy of the attenuation intensity of the optical signal attenuatorminI.e. the minimum value of the compressive stress that can cause the deformation element 30 to bend. The critical compressive stress is then calculated as:
p in formula (1)crFor the critical compressive stress, E is the modulus of elasticity of the deformation element 30, I is the moment of inertia of the deformation element 30, and L is the length of the deformation element between the first and second connecting members 50 and 60, i.e., the distance between the first and second connecting members 50 and 60 along the extension direction of the deformation element 30. So as to make the critical pressure stress PcrLess than minimum compressive stress PminThe deformation element 30 can be kept at the minimum compressive stress PminCan be bent under the action of (i.e. bending)
Pcr<Pmin(2)
Bringing formula (1) into formula (2):
the minimum distance L between the first connecting member 50 and the second connecting member can be obtained according to the formula (3)min：
In some embodiments, as shown in fig. 4, the shape changing element 30 includes a first metal sheet 31 and a second metal sheet 32, the first metal sheet 31 is connected to the attenuating element 20, and is connected to the fixing member 40 by the first and second connection members 50 and 60, the second metal sheet 32 is connected to the first metal sheet 31, and the thermal expansion coefficient of the second metal sheet 32 is different from that of the first metal sheet 31, when the temperature changes, the amount of deformation of the first metal sheet 31 and the second metal sheet 32 is different, thereby bending the deforming member 30, and specifically, the relationship between the deformation of the deforming member 30 and the temperature change is exemplified by the case where the thermal expansion coefficient of the first metal sheet 31 is larger than that of the second metal sheet 32, in a state where the temperature is increased, the elongation of the first metal sheet 31 is greater than that of the second metal sheet 32, and the deforming member 30 is bent to one side of the first metal sheet 31; in the state where the temperature is lowered, the contraction amount of the first metal piece 31 is larger than that of the second metal piece 32, and the deformation element 30 is bent to the second metal piece 32 side.
In some embodiments, the optical signal attenuator further includes a locking element, at least one of the first connecting element 50 and the second connecting element 60 is a movable element, that is, a connecting element capable of sliding along the extending direction of the deformation element, and the locking element 70 is detachably connected to the movable element to limit the relative movement between the movable element and the deformation element and to limit the relative movement between the movable element and the fixed element. The following description will be made taking the first connecting member 50 as an example.
As shown in fig. 4, the first link 50 is slidably coupled to the fixing member 40 and slidably coupled to the shape changing member 30, the first link 50 is detachably coupled to the locking member 70, and in a state where the locking member 70 is coupled to the first link 50, the locking member 70 limits the relative movement between the first link 50 and the shape changing member 30 and limits the relative movement between the first link 50 and the fixing member 40. The locking element 70 is detached from the first connecting element 50, the first connecting element 50 can slide along the extending direction of the deformation element 40, so that the distance between the first connecting element 50 and the second connecting element 60 is adjusted, the length of the deformation element 60 between the first connecting element 50 and the second connecting element 60 is adjusted, the deformation amount of the deformation element 60 is adjusted, and further the attenuation degree of the optical signal attenuator is adjusted, after the first connecting element 50 slides to the preset position along the extending direction of the deformation element 30, the locking element 70 is connected with the first connecting element 50, so that the relative movement between the first connecting element 50 and the deformation element 30 is limited, and the relative movement between the first connecting element 50 and the fixing element 40 is limited, so that the deformation element 30 is fixed with the fixing element 40 through the first connecting element 50, and further the deformation element 30 can generate bending deformation. The locking member 70 is any structure that can be detachably coupled to the first coupling member 50, can limit the relative movement between the first coupling member 50 and the shape changing member, and can limit the relative movement between the first coupling member 50 and the fixing member 40, and the structure of the locking member 70 will be described below with reference to fig. 5 and 6, and it should be understood that the structure of the locking member 70 is not limited to the two structures described below.
As shown in fig. 5, the first type of locking member 70A includes: a sleeve 71A and a base 72A, the base 72A being connected to the outer surface of the sleeve 71A. The sleeve 71A is provided with a deformation groove 73A, clamping plates 74A are provided on both sides of the deformation groove 73A, and a locking hole 75A is provided in the clamping plate 74A. The sleeve 71A is sleeved on the deformation element, the bottom surface of the base 72A is contacted with the fixing part 40, and the size of the inner edge of the sleeve 71A is larger than that of the outer edge of the deformation element 30, so that the locking element 70A of the first type can slide along the extension direction of the deformation element; after moving the locking member to the desired position, the bolt is passed through the locking hole of the clamping plate and the nut is mounted on the other side of the bolt, and by tightening the nut, a pressing force is applied to the clamping plate 74A, thereby deforming the deformation groove 73A and reducing the size of the inner edge of the sleeve 71A, at which time a friction force is generated between the sleeve 71A and the deforming member 30, which friction force can limit the relative movement between the first type locking member 70A and the deforming member 30, and at the same time, due to the deformation of the sleeve 71A, the base 72A is pressed against the fixing member 40A, and a friction force is also generated between the base 72A and the fixing member 40, which friction force can limit the relative movement between the first type locking member 70A and the fixing member 40.
As shown in fig. 6, the second type locking member 70B includes: a mounting sleeve 71B and a seat plate 72B, the mounting sleeve 71B being connected to an outer surface of the seat plate 72B. The mounting sleeve 71B is provided with a threaded hole 73B. A mounting sleeve 71B, the bottom surface of the seat plate 72B is contacted with the fixing member 40, the inner edge of the mounting sleeve 71B is larger than the outer edge of the deformation element 30, so that the locking element 70B can slide along the extension direction of the deformation element; after the locking element is moved to the desired position, the bolt is passed through the threaded hole 73B and abuts against the deformation element 30 at the other end of the bolt, so that a frictional force is generated between the bolt and the deformation element 30, which frictional force can limit the relative movement between the second type locking element 70B and the deformation element 30, and at the same time, under the positive pressure between the bolt and the deformation element 30, the seat plate 72B is pressed against the fixing member 40, and a frictional force is also generated between the seat plate 72B and the fixing member 40, which frictional force can limit the relative movement between the second type locking element 70B and the fixing member 40.
In some embodiments, as shown in fig. 7, the optical signal attenuator further includes a mounting seat 80, and the mounting seat 80 is connected to the shape-changing element 30 and the attenuating element 20, that is, the attenuating element 20 is connected to the shape-changing element 30 through the mounting seat 80. The deformation element 30 is an elongated element, which is not directly connected to the damping element 30, and by providing the mounting seat 80 with a larger size and connecting the damping element 20 and the deformation element 30 through the mounting seat 80, the damping element 20 and the deformation element 30 can be reliably connected, and the difficulty in mounting the deformation element 20 can be reduced.
In some embodiments, as shown in fig. 8, the optical signal path 10 includes: a first collimator 12 and a second collimator 13. The first collimator 12 is located on one side of the attenuating element 20 and the second collimator 13 is located on the other side of the attenuating element 20, with a receiving space 11 for receiving the attenuating element being formed between the first collimator 12 and the second collimator 13. By arranging the first collimator 12 and the second collimator 13, the non-parallel input optical signal can be converted into the parallel input optical signal, so that the optical signal can be prevented from leaking in a state that the optical fiber is not required to be arranged, and the optical signal loss of the optical signal channel 10 is reduced. Optionally, the end portions of the first collimator 12 and the second collimator 13 are both provided with an antireflection film, so that the light transmittance of the first collimator 12 and the second collimator 13 is improved, and further the optical signal loss of the optical signal channel 10 is reduced.
As shown in fig. 9, the present novel embodiment also provides an optical signal transmission system including: an optical splitter 1, a first optical fibre 2, a second optical fibre 3 and an optical signal attenuator 4 as described above.
The optical splitter 1 is provided with a first signal output end 1a and a second signal output end 1b, and can output the input optical signals from the first signal output end 1a and the second signal output end 1b, respectively, and the intensity of the optical signal output from the first signal output end 1a is equal to the intensity of the optical signal output from the second signal output end 1 b.
The first optical fiber 2 is connected to the first signal output terminal 1a, the second optical fiber 3 is connected to the second signal output terminal 1b, and the optical signal attenuator 4 is disposed in the first optical fiber 2 or the second optical fiber 3.
By calibrating the optical signal attenuator 4, the corresponding relationship between the attenuation intensity of the optical signal attenuator 4 and the temperature can be obtained, and for example, the corresponding relationship between the attenuation intensity of the optical signal attenuator 4 and the temperature is shown in fig. 10, and the attenuation intensity and the temperature are in a roughly proportional relationship.
In some embodiments, in a state where the ambient temperature is known, the theoretical attenuation intensity of the optical signal attenuator 4 may be obtained, the intensity of the optical signal in the first optical fiber 2 that is not attenuated by the optical signal attenuator 4 is subtracted from the intensity of the optical signal in the second optical fiber 3 that is attenuated by the optical signal attenuator 4, so as to obtain the actual attenuation intensity of the optical signal attenuator 4, and whether a fault exists in the optical signal transmission system may be determined by comparing the theoretical attenuation intensity and the actual attenuation intensity, specifically, it is determined that the fault does not exist in the optical signal transmission system in a state where an absolute value of a difference between the theoretical attenuation intensity and the actual attenuation intensity is smaller than a preset threshold; and confirming that a fault exists in the optical signal transmission system in a state that the absolute value of the difference between the theoretical attenuation intensity and the actual attenuation intensity is greater than a preset threshold value.
In some embodiments, in a state that it is confirmed that there is no fault in the optical signal transmission system, the temperature of the environment may also be measured by the attenuation intensity of the optical signal attenuator 4, specifically, the intensity of the optical signal in the first optical fiber 2 that is not attenuated by the optical signal attenuator 4 is subtracted from the intensity of the optical signal in the second optical fiber 3 that is attenuated by the optical signal attenuator 4 to obtain the attenuation intensity of the optical signal attenuator 4, and the temperature of the environment is obtained by the correspondence between the attenuation intensity of the optical signal attenuator 4 and the temperature.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. An optical signal attenuator, comprising:
an optical signal channel provided with an accommodation space;
an attenuating element, at least a portion of which is located in the accommodating space to absorb a portion of the optical signal in the optical signal channel;
the deformation element is connected with the attenuation element and can deform according to temperature so as to enable the attenuation element to displace;
the displacement direction of the attenuation element and the extension direction of the optical signal channel form a preset angle.
2. The optical signal attenuator of claim 1, further comprising a fixture;
along the extending direction of the deformation element, one end of the deformation element is fixedly connected with the fixing piece, and the other end of the deformation element is connected with the attenuation element;
the extending direction of the deformation element and the extending direction of the optical signal channel form the preset angle.
3. The optical signal attenuator of claim 1, further comprising:
a fixing member;
the first connecting piece is connected with the fixing piece and the deformation element;
the second connecting piece is connected with the fixing piece and the deformation element;
the first connecting piece and the second connecting piece are arranged along the extending direction of the deformation element, and the position where the deformation element is connected with the attenuation element is located between the first connecting piece and the second connecting piece.
4. The optical signal attenuator of claim 3, wherein the first connection member and the second connection member are spaced apart by a predetermined distance along the extension direction of the shape changing element.
5. The optical signal attenuator of claim 3, wherein the shape changing element comprises:
a first metal sheet connected to the damping member and connected to the fixing member through the first connecting member and the second connecting member;
and the second metal sheet is connected with the first metal sheet, and the thermal expansion coefficient of the second metal sheet is different from that of the first metal sheet.
6. The optical signal attenuator of claim 3, further comprising a latch element;
the first connecting piece is connected with the fixed piece in a sliding way and connected with the deformation element in a sliding way, the first connecting piece is detachably connected with the locking element so as to limit the relative movement between the first connecting piece and the deformation element and the relative movement between the first connecting piece and the fixed piece,
and/or the presence of a gas in the gas,
the second connecting piece is connected with the fixing piece in a sliding mode and connected with the deformation element in a sliding mode, and the first connecting piece is detachably connected with the locking element so as to limit the relative movement between the first connecting piece and the deformation element and the relative movement between the first connecting piece and the fixing piece.
7. The optical signal attenuator of claim 1, further comprising:
a mount connected to the shape changing element and the attenuating element.
8. The optical signal attenuator of claim 1, wherein the optical signal path comprises:
a first collimator located on one side of the attenuating element;
a second collimator is located on the other side of the attenuating element;
the first collimator and the second collimator form the accommodating space therebetween.
9. The optical signal attenuator of claim 8, wherein the ends of the first collimator and the second collimator are each provided with an antireflection film.
10. An optical signal transmission system, comprising:
the optical splitter is provided with a first signal output end and a second signal output end;
the first optical fiber is connected with the first signal output end;
the second optical fiber is connected with the second signal output end;
the optical signal attenuator of any one of claims 1-9 disposed in the first optical fiber or the second optical fiber.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020444531.0U CN211741626U (en) | 2020-03-31 | 2020-03-31 | Optical signal attenuator and optical signal transmission system |
| JP2022513482A JP7361206B2 (en) | 2020-03-31 | 2020-12-10 | Optical signal attenuator and optical signal transmission system |
| PCT/CN2020/135493 WO2021196720A1 (en) | 2020-03-31 | 2020-12-10 | Optical signal attenuator and optical signal transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020444531.0U CN211741626U (en) | 2020-03-31 | 2020-03-31 | Optical signal attenuator and optical signal transmission system |
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| Publication Number | Publication Date |
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| CN211741626U true CN211741626U (en) | 2020-10-23 |
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| CN202020444531.0U Active CN211741626U (en) | 2020-03-31 | 2020-03-31 | Optical signal attenuator and optical signal transmission system |
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| JP (1) | JP7361206B2 (en) |
| CN (1) | CN211741626U (en) |
| WO (1) | WO2021196720A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021196720A1 (en) * | 2020-03-31 | 2021-10-07 | 武汉光迅科技股份有限公司 | Optical signal attenuator and optical signal transmission system |
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| JPS5742827A (en) * | 1980-08-28 | 1982-03-10 | Toshiba Corp | Temperature-sensitive optical switch |
| JPS61252521A (en) * | 1985-05-02 | 1986-11-10 | Sony Corp | Ultraviolet exposing device |
| CA2068926C (en) * | 1991-09-03 | 1997-08-26 | Cleo D. Anderson | Optical line monitor |
| TW355752B (en) | 1996-09-27 | 1999-04-11 | Siemens Ag | Optical coupling-device to couple the light between two waveguide-end-face |
| JPH10133157A (en) * | 1996-10-31 | 1998-05-22 | Ando Electric Co Ltd | Variable light attenuator |
| US6130984A (en) * | 1997-05-19 | 2000-10-10 | E-Tek Dynamics, Inc. | Miniature variable optical attenuator |
| US6275320B1 (en) | 1999-09-27 | 2001-08-14 | Jds Uniphase, Inc. | MEMS variable optical attenuator |
| JP2002169104A (en) | 2000-12-01 | 2002-06-14 | Sumitomo Electric Ind Ltd | Optical device |
| US6580868B2 (en) | 2001-03-19 | 2003-06-17 | Optiwork, Inc. | High-resolution variable optical attenuator with mechanical adjustment |
| KR100451927B1 (en) | 2002-02-27 | 2004-10-08 | 삼성전기주식회사 | Variable optical attenuator |
| JP2004191606A (en) | 2002-12-11 | 2004-07-08 | Hitachi Ltd | Optical switch |
| JP2005010656A (en) | 2003-06-20 | 2005-01-13 | Nhk Spring Co Ltd | Optical waveguide circuit with variable light-attenuation mechanism |
| JP2005227637A (en) | 2004-02-16 | 2005-08-25 | Citizen Watch Co Ltd | Actuator device |
| CN101419313B (en) * | 2008-10-31 | 2010-10-13 | 武汉光迅科技股份有限公司 | Method for manufacturing afebrile array wave-guide grating based on flat-plate wave-guide movement |
| CN105929485A (en) * | 2016-05-16 | 2016-09-07 | 中国电子科技集团公司第四十研究所 | Linear-type continuous adjustable light decay device based on linear motor |
| CN110703384B (en) * | 2019-10-09 | 2022-05-06 | 蚌埠学院 | Data processing method of continuously adjustable optical attenuator |
| CN211741626U (en) * | 2020-03-31 | 2020-10-23 | 武汉光迅科技股份有限公司 | Optical signal attenuator and optical signal transmission system |
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- 2020-12-10 JP JP2022513482A patent/JP7361206B2/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021196720A1 (en) * | 2020-03-31 | 2021-10-07 | 武汉光迅科技股份有限公司 | Optical signal attenuator and optical signal transmission system |
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| Publication number | Publication date |
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| JP7361206B2 (en) | 2023-10-13 |
| WO2021196720A1 (en) | 2021-10-07 |
| JP2022552600A (en) | 2022-12-19 |
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