Miniaturized integrated isolation detector

Abstract

A miniaturized integrated isolation detector provided by the utility model comprises a double-core pin, a Faraday rotation sheet, a light splitting wedge angle sheet, a magnetic ring and a TO assembly, an emergent optical fiber in the double-core pin is used for emitting an optical signal, and the Faraday rotation sheet, the light splitting wedge angle sheet, the magnetic ring and the TO assembly are sequentially arranged along an optical path of the optical signal emitted by the emergent optical fiber. The distance between the Faraday rotation piece and the magnetic ring is smaller than or equal to the length of the external magnetic field range of the magnetic ring, the Faraday rotation piece can also generate the gyromagnetic effect through the external magnetic field of the magnetic ring, interference optical signals input by the receiving optical fiber are isolated, and therefore the magnetic ring does not need to be arranged on the periphery of the Faraday rotation piece, and the interference optical signals are isolated. The problem that the cross section size of the magnetic ring is too large is avoided, the cross section size of the magnetic ring can be relatively smaller, and the integration level of the detector is improved.

Description

Technical Field

[0001] This utility model relates to the field of optical communication technology, and in particular to a miniaturized integrated isolation detector. Background Technology

[0002] In the prior art, detectors typically include an output optical fiber, a beam splitter wedge, a receiving optical fiber, and a TO component. The output optical fiber emits an optical signal to the beam splitter wedge, which transmits a portion of the optical signal to the TO component. The TO component can be connected to an external power meter to detect the intensity of the optical signal. The beam splitter wedge also reflects another portion of the optical signal to the receiving optical fiber, whose outer end is connected to other external devices to continue the transmission of the optical signal.

[0003] During the above process, due to external environmental factors, external interference light signals may be introduced into the device through the receiving optical fiber. After being introduced along the receiving optical fiber, the interference light signals will be reflected by the beam splitter wedge to the output optical fiber and transmitted along the output optical fiber to the external light source device, which will affect the light source device. Therefore, it is necessary to set up a corresponding isolator to isolate the interference light signals from the receiving optical fiber.

[0004] A typical isolator consists of a Faraday rotator and a magnetic ring. The magnetic ring is fitted around the Faraday rotator, and the magnetic field inside the magnetic ring causes the Faraday rotator to produce a gyromagnetic effect, thereby isolating interference optical signals from the receiving optical fiber. To produce an ideal gyromagnetic effect, the magnetic ring needs to be thick enough. The thicker the magnetic ring, the stronger the magnetic field. Typically, the thickness of the magnetic ring needs to be greater than 1 mm. However, since the magnetic ring is fitted onto the Faraday rotator, the combined cross-sectional area of ​​the Faraday rotator and the magnetic ring is too large, resulting in an excessively large overall device size and low integration.

[0005] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content

[0006] The present invention relates to how to reduce the size of the isolation device in the detector, thereby improving the integration of the detector.

[0007] This utility model provides a miniaturized integrated isolation detector, comprising: a dual-core pin 1, a Faraday rotator 2, a beam splitter wedge 3, a magnetic ring 4, and a TO assembly 5, wherein:

[0008] The dual-core ferrule 1 includes an outgoing optical fiber 11 and a receiving optical fiber 12. Both the outgoing optical fiber 11 and the receiving optical fiber 12 are arranged toward the Faraday rotator 2. The outgoing optical fiber 11 is used to emit optical signals. The Faraday rotator 2, the beam splitter wedge 3, the magnetic ring 4, and the TO assembly 5 are arranged sequentially along the optical path of the optical signal emitted by the outgoing optical fiber 11. The distance between the Faraday rotator 2 and the magnetic ring 4 is less than or equal to the length of the external magnetic field range of the magnetic ring 4.

[0009] The beam splitter wedge 3 is used to transmit a first preset ratio of optical signal to the TO component 5. The beam splitter wedge 3 is also used to reflect a second preset ratio of optical signal to the receiving optical fiber 12. The receiving optical fiber 12 is used to receive the optical signal reflected back from the beam splitter wedge 3. The Faraday rotator 2 is used to isolate the interference light input to the receiving optical fiber 12.

[0010] Preferably, the distance between the Faraday rotator 2 and the magnetic ring 4 is 0.55mm-0.7mm.

[0011] Preferably, the dual-core pin 1 further includes: a dual-core capillary tube 13 and a tail sleeve 14, wherein:

[0012] One end of the dual-core capillary tube 13 faces the Faraday rotating plate 2, and the tail sleeve 14 is sleeved around the other end of the dual-core capillary tube 13.

[0013] The dual-core capillary 13 is provided with at least two core holes, both of which pass through both ends of the dual-core capillary 13. The outgoing optical fiber 11 is located in one of the core holes and extends to the end face of the dual-core capillary 13 facing the Faraday rotator 2. The receiving optical fiber 12 is located in the other core hole and extends to the end face of the dual-core capillary 13 facing the Faraday rotator 2.

[0014] Preferably, a polarizing beam splitter 6 and a half-wave plate 7 are further provided between the dual-core capillary tube 13 and the Faraday rotating plate 2. The polarizing beam splitter 6 is disposed on the end face of the dual-core capillary tube 13 facing the Faraday rotating plate 2, and the half-wave plate 7 is disposed on the end face of the polarizing beam splitter 6 facing the Faraday rotating plate 2.

[0015] The polarizing beam splitter 6, half-wave plate 7, Faraday rotator 2, and magnetic ring 4 are used together to isolate the interference light input from the receiving optical fiber 12.

[0016] Preferably, a collimating lens 8 is further provided between the half-wave plate 7 and the Faraday rotator plate 2, with one end of the collimating lens 8 facing the half-wave plate 7 and the other end of the collimating lens 8 facing the Faraday rotator plate 2.

[0017] Preferably, the miniaturized integrated isolation detector further includes a first bridge connector 9 and a second bridge connector 10, wherein:

[0018] One end of the first bridge tube 9 is sleeved around the collimating lens 8, and the other end of the first bridge tube 9 is sleeved around the dual-core capillary tube 13.

[0019] One end of the second bridge tube 10 is sleeved around the collimating lens 8, and the other end of the second bridge tube 10 is sleeved around the Faraday rotator 2.

[0020] The dual-core capillary tube 13, collimating lens 8, and Faraday rotator 2 are sequentially fixed along the same central axis by the first bridge connector 9 and the second bridge connector 10.

[0021] Preferably, the miniaturized integrated isolation detector further includes an annular frame 101, which is sleeved and fixed around the Faraday rotator 2, and the second bridge tube 10 is sleeved around the annular frame 101.

[0022] One end of the annular frame 101 is connected to the beam splitter wedge 3, and the other end of the annular frame 101 is connected to the end face of the collimating lens 8 facing the magnetic ring 4.

[0023] Preferably, the miniaturized integrated isolation detector further includes an outer sealing metal tube 102, one end of which is sleeved around the tail sleeve 14, and the other end of which is sleeved around the TO component 5. The Faraday rotator plate 2, the beam splitting wedge plate 3, and the magnetic ring 4 are located inside the outer sealing metal tube 102.

[0024] Preferably, the inner side of the outer sealing metal tube 102 is further provided with a first limiting ring platform 103 and a second limiting ring platform 104. The first limiting ring platform 103 is located on the side of the magnetic ring 4 facing the TO component 5 and is in contact with the magnetic ring 4. The second limiting ring platform 104 is located on the side of the magnetic ring 4 facing the dual core pin 1 and is in contact with the magnetic ring 4.

[0025] The first limiting ring platform 103 is used to limit the magnetic ring 4 to the side facing the TO component 5, and the second limiting ring platform 104 is used to limit the magnetic ring 4 to the side facing the dual-core pin 1, so as to ensure that the distance between the Faraday rotator plate 2 and the magnetic ring 4 is less than or equal to the length of the external magnetic field range of the magnetic ring 4.

[0026] Preferably, the inner diameter of the magnetic ring 4 is in the range of 0.5mm-1mm, and the outer diameter of the magnetic ring 4 is in the range of 1.6mm-2mm.

[0027] This invention provides a miniaturized integrated isolation detector, comprising: a dual-core ferrule, a Faraday rotator, a beam splitter wedge, a magnetic ring, and a TO assembly. The outgoing optical fiber in the dual-core ferrule is used to emit optical signals. The Faraday rotator, beam splitter wedge, magnetic ring, and TO assembly are sequentially arranged along the optical path of the emitted optical signal. The distance between the Faraday rotator and the magnetic ring is less than or equal to the length of the external magnetic field range of the magnetic ring. Since the Faraday rotator can also generate a gyromagnetic effect using the external magnetic field of the magnetic ring to isolate interference optical signals input from the receiving optical fiber, the magnetic ring does not need to be placed around the Faraday rotator, avoiding the problem of excessively large cross-sectional dimensions of the magnetic ring. The cross-sectional dimensions of the magnetic ring can be relatively smaller, improving the integration of the detector. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A cross-sectional view of a miniaturized integrated isolation detector provided for an embodiment of this utility model;

[0030] Figure 2 A cross-sectional view of another miniaturized integrated isolation detector provided in an embodiment of this utility model;

[0031] Figure 3 A cross-sectional view of a dual-core pin of a miniaturized integrated isolation detector provided for an embodiment of this utility model;

[0032] Figure 4 A cross-sectional view of another miniaturized integrated isolation detector provided in an embodiment of this utility model;

[0033] Figure 5 A cross-sectional view of another miniaturized integrated isolation detector provided in an embodiment of this utility model;

[0034] Figure 6 A cross-sectional view of another miniaturized integrated isolation detector provided in an embodiment of this utility model;

[0035] Figure 7 A cross-sectional view of another miniaturized integrated isolation detector provided in an embodiment of this utility model;

[0036] The diagram is labeled as follows:

[0037] Dual-core ferrule 1; outgoing optical fiber 11; receiving optical fiber 12; dual-core capillary tube 13; tail sleeve 14; Faraday rotator 2; beam splitter wedge 3; magnetic ring 4; TO assembly 5; polarizer beam splitter 6; half-wave plate 7; collimating lens 8; first bridge connector 9; second bridge connector 10; annular frame 101; outer sealing metal tube 102; first limiting ring stage 103; second limiting ring stage 104. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0039] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0040] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more. Furthermore, for example, the description may use the prefix "A" or "B" to describe the same type of nouns as two independent entities. In this case, the features defined with "A" and "B" are used only to distinguish between similar entities and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0041] In describing some embodiments, the terms "coupled," "coupled," and "connected," and their derivative expressions, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact with each other. Similarly, the term "coupled" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact. However, the terms "connected" or "coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other, such as "optical coupling" or "wireless connection." The embodiments disclosed herein are not necessarily limited to the scope of this invention.

[0042] In the description of this utility model, "A and / or B" will be used to represent specific features. The corresponding expressions include the following three combinations: only A, only B, and a combination of A and B.

[0043] As used in this invention, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the specified value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the specified quantity, i.e., the limitations of the measurement system.

[0044] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as openly inclusive, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples; that is, although they may be incorporated into embodiments or examples using the above terms for reasons such as order and position, it does not limit them to be incorporated in combination by a single embodiment or example.

[0045] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0046] Example 1:

[0047] This utility model embodiment provides a miniaturized integrated isolation detector, such as Figure 1 As shown, it includes: a dual-core pin 1, a Faraday rotator 2, a beam splitter wedge 3, a magnetic ring 4, and a TO assembly 5, wherein:

[0048] The dual-core ferrule 1 includes an outgoing optical fiber 11 and a receiving optical fiber 12. Both the outgoing optical fiber 11 and the receiving optical fiber 12 are arranged toward the Faraday rotator 2. The outgoing optical fiber 11 is used to emit optical signals. The Faraday rotator 2, the beam splitter wedge 3, the magnetic ring 4, and the TO assembly 5 are arranged sequentially along the optical path of the optical signal emitted by the outgoing optical fiber 11. The distance between the Faraday rotator 2 and the magnetic ring 4 is less than or equal to the length of the external magnetic field range of the magnetic ring 4.

[0049] The beam splitter wedge 3 is used to transmit a first preset ratio of optical signal to the TO component 5. The beam splitter wedge 3 is also used to reflect a second preset ratio of optical signal to the receiving optical fiber 12. The receiving optical fiber 12 is used to receive the optical signal reflected back from the beam splitter wedge 3. The Faraday rotator 2 is used to isolate the interference light input to the receiving optical fiber 12.

[0050] In this embodiment, a light source device is connected to the outer end of the outgoing optical fiber 11, and the TO component 5 can be connected to the power meter at the outer end to detect the intensity of the light signal emitted from the outgoing optical fiber 11; a beam splitting film is provided on the beam splitting wedge plate 3 to transmit the light signal of the first preset ratio and reflect the light signal of the second preset ratio. The first preset ratio and the second preset ratio are both set by those skilled in the art according to the actual situation, and the first preset ratio is much smaller than the second preset ratio.

[0051] The magnetic ring 4 is annular. It serves two purposes: firstly, to provide a magnetic field for the Faraday rotator 2; secondly, the hole in the center of the magnetic ring 4 allows light signals transmitted from the beam-splitting wedge 3 to pass through. In this embodiment, the magnetic ring 4 is not fitted around the periphery of the Faraday rotator 2, but is positioned between the beam-splitting wedge 3 and the TO assembly 5. In this case, the Faraday rotator 2 no longer utilizes the internal magnetic field of the magnetic ring 4 to generate a gyromagnetic effect, but instead needs to utilize the external magnetic field of the magnetic ring 4. Therefore, it is necessary to ensure that the distance between the Faraday rotator 2 and the magnetic ring 4 is less than or equal to the length of the external magnetic field range of the magnetic ring 4, so that the Faraday rotator 2 can normally generate a gyromagnetic effect, thereby isolating interfering light signals. Based on the above design, since the hole in the center of the magnetic ring 4 no longer needs to accommodate the Faraday rotator 2, the inner diameter of the magnetic ring 4 can be relatively smaller. While ensuring that the thickness of the magnetic ring 4 is greater than 1 mm, the outer diameter of the magnetic ring 4 can be relatively smaller, resulting in a relatively smaller cross-sectional size of the entire device and improved device integration. In this embodiment, the distance between the Faraday rotator 2 and the magnetic ring 4 is 0.55mm-0.7mm, that is, the distance between the Faraday rotator 2 and the magnetic ring 4 can be 0.55mm, 0.625mm, or 0.7mm.

[0052] The inner diameter of the magnetic ring 4 ranges from 0.5mm to 1mm, that is, the inner diameter of the magnetic ring 4 can be 0.5mm, 0.75mm, or 1mm; the outer diameter of the magnetic ring 4 ranges from 1.6mm to 2mm, that is, the outer diameter of the magnetic ring 4 can be 1.6mm, 1.8mm, or 2mm.

[0053] Furthermore, in this embodiment, the dual-core ferrule 1 requires a corresponding structure to accommodate the outgoing optical fiber 11 and the receiving optical fiber 12. Therefore, the dual-core ferrule 1 also involves the following design:

[0054] like Figure 2 and Figure 3 As shown, the dual-core ferrule 1 further includes a dual-core capillary tube 13 and a tail sleeve 14, wherein: one end of the dual-core capillary tube 13 faces the Faraday rotator 2, and the tail sleeve 14 is sleeved around the other end of the dual-core capillary tube 13; the dual-core capillary tube 13 is provided with at least two core holes, both of which penetrate both ends of the dual-core capillary tube 13; the outgoing optical fiber 11 is located in one of the core holes and extends to the end face of the dual-core capillary tube 13 facing the Faraday rotator 2, and the receiving optical fiber 12 is located in the other core hole and extends to the end face of the dual-core capillary tube 13 facing the Faraday rotator 2.

[0055] In this embodiment, the tail sleeve 14 can be made of metal material, and the outer periphery of the dual-core capillary tube 13 and the inner side of the tail sleeve 14 can be fixed by adhesive. The tail sleeve 14 is used to fix the entire device housing.

[0056] Furthermore, for the interference optical signal input to the receiving optical fiber 12, the corresponding isolator requires additional components to achieve the desired effect. Therefore, this embodiment also involves the following design:

[0057] like Figure 4 As shown, a polarizing beam splitter 6 and a half-wave plate 7 are further disposed between the dual-core capillary tube 13 and the Faraday rotator 2. The polarizing beam splitter 6 is disposed on the end face of the dual-core capillary tube 13 facing the Faraday rotator 2, and the half-wave plate 7 is disposed on the end face of the polarizing beam splitter 6 facing the Faraday rotator 2. The polarizing beam splitter 6, the half-wave plate 7, the Faraday rotator 2, and the magnetic ring 4 are used together to isolate the interference light input from the receiving optical fiber 12. In this embodiment, the half-wave plate 7 is located in the optical path of the receiving optical fiber 12.

[0058] Furthermore, in this embodiment, it is also necessary to collimate the optical signal emitted from the output fiber 11 and the optical signal reflected to the receiving fiber 12. Therefore, this embodiment also involves the following design:

[0059] like Figure 5 As shown, a collimating lens 8 is also provided between the half-wave plate 7 and the Faraday rotator plate 2, with one end of the collimating lens 8 facing the half-wave plate 7 and the other end of the collimating lens 8 facing the Faraday rotator plate 2.

[0060] In this embodiment, in order to fix the dual-core capillary 13, the collimating lens 8, and the Faraday rotator 2 on the same central axis, the following design is also involved:

[0061] like Figure 5 As shown, the miniaturized integrated isolation detector further includes a first bridge connector 9 and a second bridge connector 10, wherein: one end of the first bridge connector 9 is sleeved around the collimating lens 8, and the other end of the first bridge connector 9 is sleeved around the dual-core capillary tube 13; one end of the second bridge connector 10 is sleeved around the collimating lens 8, and the other end of the second bridge connector 10 is sleeved around the Faraday rotator 2; the dual-core capillary tube 13, the collimating lens 8, and the Faraday rotator 2 are sequentially fixed along the same central axis by the first bridge connector 9 and the second bridge connector 10.

[0062] In this embodiment, the outer periphery of the dual-core capillary tube 13 and the inner wall of the first bridge tube 9 can be fixed by adhesive, the outer periphery of the collimating lens 8 and the inner wall of the first bridge tube 9 can be fixed by adhesive, and the outer periphery of the collimating lens 8 and the inner wall of the second bridge tube 10 can be fixed by adhesive.

[0063] In this embodiment, the distance between the collimating lens 8 and the beam-splitting wedge 3 needs to be precisely controlled to achieve accurate optical transmission. However, the thickness of the Faraday rotator 2 between the collimating lens 8 and the beam-splitting wedge 3 is related to the wavelength parameter of the optical signal, and its thickness cannot be arbitrarily changed according to requirements. Furthermore, the distance between the collimating lens 8 and the beam-splitting wedge 3 usually needs to be greater than the thickness of the Faraday rotator 2. Therefore, an additional device needs to be designed between the collimating lens 8 and the beam-splitting wedge 3 to fix the collimating lens 8, the Faraday rotator 2, and the beam-splitting wedge 3 while defining the distance between them without affecting the thickness of the Faraday rotator 2. Therefore, this embodiment also involves the following design:

[0064] like Figure 6 As shown, the miniaturized integrated isolation detector also includes an annular frame 101, which is sleeved and fixed around the Faraday rotator 2, and the second bridge tube 10 is sleeved around the annular frame 101; one end of the annular frame 101 is connected to the beam splitting wedge 3, and the other end of the annular frame 101 is connected to the end face of the collimating lens 8 facing the magnetic ring 4.

[0065] In this embodiment, the cross-sectional area of ​​the collimating lens 8 and the bottom surface area of ​​the beam splitter wedge 3 are both larger than the outer diameter of the annular frame 101, so as to ensure that both ends of the annular frame 101 can be connected to the collimating lens 8 and the beam splitter wedge 3 respectively. The width of the annular frame 101 is the distance that needs to be precisely controlled between the collimating lens 8 and the beam splitter wedge 3.

[0066] In this embodiment, it is also necessary to fix the magnetic ring 4 and the TO assembly 5 relative to other devices, thus involving the following design:

[0067] like Figure 7 As shown, the miniaturized integrated isolation detector also includes an outer sealing metal tube 102. One end of the outer sealing metal tube 102 is sleeved around the tail sleeve 14, and the other end is sleeved around the TO assembly 5. The Faraday rotator 2, the beam splitter wedge 3, and the magnetic ring 4 are located inside the outer sealing metal tube 102. In this embodiment, the outer diameter of the outer sealing metal tube 102 is no greater than 2.3 mm.

[0068] In this embodiment, the outer periphery of the tail sleeve 14 and the inner wall of the outer sealing metal tube 102 can be fixed together by adhesive, the outer periphery of the magnetic ring 4 and the inner wall of the outer sealing metal tube 102 can be fixed together by adhesive, and the outer periphery of the TO component 5 and the inner wall of the outer sealing metal tube 102 can be fixed together by adhesive.

[0069] Furthermore, although the magnetic ring 4 can be fixed inside the outer metal tube 102 by adhesive, under the influence of the external environment, the magnetic ring 4 may still undergo a certain axial displacement inside the outer metal tube 102, causing the Faraday rotator 2 to leave the range of the external magnetic field of the magnetic ring 4. Therefore, it is necessary to limit the magnetic ring 4 inside the outer metal tube 102. Thus, this embodiment also involves the following design:

[0070] like Figure 7 As shown, the inner side of the outer sealing metal tube 102 is also provided with a first limiting ring platform 103 and a second limiting ring platform 104. The first limiting ring platform 103 is located on the side of the magnetic ring 4 facing the TO component 5 and is in contact with the magnetic ring 4. The second limiting ring platform 104 is located on the side of the magnetic ring 4 facing the dual-core pin 1 and is in contact with the magnetic ring 4. The first limiting ring platform 103 is used to limit the side of the magnetic ring 4 facing the TO component 5, and the second limiting ring platform 104 is used to limit the side of the magnetic ring 4 facing the dual-core pin 1, so as to ensure that the distance between the Faraday rotator 2 and the magnetic ring 4 is less than or equal to the length of the external magnetic field range of the magnetic ring 4.

[0071] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A miniaturized integrated isolation detector, characterized in that, include: The components include a dual-core insert (1), a Faraday rotator (2), a beam splitter wedge (3), a magnetic ring (4), and a TO assembly (5), wherein: The dual-core ferrule (1) includes an outgoing optical fiber (11) and a receiving optical fiber (12). Both the outgoing optical fiber (11) and the receiving optical fiber (12) are arranged toward the Faraday rotator (2). The outgoing optical fiber (11) is used to emit optical signals. The Faraday rotator (2), the beam splitter wedge (3), the magnetic ring (4) and the TO assembly (5) are arranged sequentially along the optical path of the optical signal emitted by the outgoing optical fiber (11). The distance between the Faraday rotator (2) and the magnetic ring (4) is equal to the length of the external magnetic field range of the magnetic ring (4). The beam splitter wedge (3) is used to transmit a first preset ratio of optical signal to the TO component (5). The beam splitter wedge (3) is also used to reflect a second preset ratio of optical signal to the receiving optical fiber (12). The receiving optical fiber (12) is used to receive the optical signal reflected back from the beam splitter wedge (3). The Faraday rotator (2) is used to isolate the interference light input to the receiving optical fiber (12).

2. The miniaturized integrated isolation detector according to claim 1, characterized in that, The distance between the Faraday rotator (2) and the magnetic ring (4) is 0.55mm-0.7mm.

3. The miniaturized integrated isolation detector according to claim 1, characterized in that, The dual-core pin (1) further includes: a dual-core capillary tube (13) and a tail sleeve (14), wherein: One end of the dual-core capillary (13) faces the Faraday rotating plate (2), and the tail sleeve (14) is sleeved around the other end of the dual-core capillary (13). The dual-core capillary (13) is provided with at least two core holes, both of which pass through both ends of the dual-core capillary (13). The outgoing optical fiber (11) is located in one of the core holes and extends to the end face of the dual-core capillary (13) facing the Faraday rotator (2). The receiving optical fiber (12) is located in the other core hole and extends to the end face of the dual-core capillary (13) facing the Faraday rotator (2).

4. The miniaturized integrated isolation detector according to claim 3, characterized in that, A polarizing beam splitter (6) and a half-wave plate (7) are also provided between the dual-core capillary tube (13) and the Faraday rotator plate (2). The polarizing beam splitter (6) is provided on the end face of the dual-core capillary tube (13) facing the Faraday rotator plate (2), and the half-wave plate (7) is provided on the end face of the polarizing beam splitter (6) facing the Faraday rotator plate (2). The polarizing beam splitter (6), half-wave plate (7), Faraday rotator (2), and magnetic ring (4) are used together to isolate the interfering light input from the receiving optical fiber (12).

5. The miniaturized integrated isolation detector according to claim 4, characterized in that, A collimating lens (8) is also provided between the half-wave plate (7) and the Faraday rotator plate (2), with one end of the collimating lens (8) facing the half-wave plate (7) and the other end of the collimating lens (8) facing the Faraday rotator plate (2).

6. The miniaturized integrated isolation detector according to claim 5, characterized in that, The miniaturized integrated isolation detector further includes a first bridge connector (9) and a second bridge connector (10), wherein: One end of the first bridge tube (9) is sleeved around the collimating lens (8), and the other end of the first bridge tube (9) is sleeved around the dual-core capillary tube (13). One end of the second bridge tube (10) is sleeved around the collimating lens (8), and the other end of the second bridge tube (10) is sleeved around the Faraday rotator (2). The dual-core capillary tube (13), collimating lens (8) and Faraday rotator (2) are sequentially fixed along the same central axis by the first bridge connector (9) and the second bridge connector (10).

7. The miniaturized integrated isolation detector according to claim 6, characterized in that, The miniaturized integrated isolation detector also includes a ring frame (101), which is sleeved and fixed around the Faraday rotator (2), and the second bridge tube (10) is sleeved around the ring frame (101). One end of the annular frame (101) is connected to the beam splitter wedge (3), and the other end of the annular frame (101) is connected to the end face of the collimating lens (8) facing the magnetic ring (4).

8. The miniaturized integrated isolation detector according to claim 3, characterized in that, The miniaturized integrated isolation detector also includes an outer metal tube (102), one end of which is sleeved around the tail sleeve (14), and the other end of which is sleeved around the TO component (5). The Faraday rotator (2), the beam splitter wedge (3), and the magnetic ring (4) are located inside the outer metal tube (102).

9. The miniaturized integrated isolation detector according to claim 8, characterized in that, The inner side of the outer sealing metal tube (102) is also provided with a first limiting ring platform (103) and a second limiting ring platform (104). The first limiting ring platform (103) is located on the side of the magnetic ring (4) facing the TO assembly (5) and is in contact with the magnetic ring (4). The second limiting ring platform (104) is located on the side of the magnetic ring (4) facing the dual core pin (1) and is in contact with the magnetic ring (4). The first limiting ring platform (103) is used to limit the magnetic ring (4) on the side facing the TO component (5), and the second limiting ring platform (104) is used to limit the magnetic ring (4) on the side facing the dual core pin (1), ensuring that the distance between the Faraday rotator (2) and the magnetic ring (4) is less than or equal to the length of the external magnetic field range of the magnetic ring (4).

10. The miniaturized integrated isolation detector according to any one of claims 1-9, characterized in that, The inner diameter of the magnetic ring (4) is in the range of 0.5mm-1mm, and the outer diameter of the magnetic ring (4) is in the range of 1.6mm-2mm.

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