Separated microcavity sensing system packaging structure

Abstract

The utility model relates to a separated microcavity sensing system packaging structure, which comprises a support A and a support B. The support A is used for placing an optical fiber taper and is of a concave structure, the upper end face of the transverse section of the support A is downwards provided with a step-shaped notch to form a first platform and a second platform, and the side face of the transverse section of the support A is provided with a square groove to form a third platform. The support B is of a long-strip-shaped structure and comprises a supporting section and a connecting section, the connecting section is a linear plate body, a square notch is formed in the upper end face of the connecting section, and the supporting section is detachably connected to the upper portion of the square notch; the supporting section is used for placing an optical microcavity sample, the length of the supporting section is larger than that of the square notch, and the lower end face of the supporting section is connected with the third platform. According to the utility model, the support A and the support B are arranged, and after it is determined that WGM is formed in the microcavity, the support A and the support B are fixed by using the ultraviolet glue, so that the ultraviolet glue is not in contact with the working surface of the microcavity and the waveguide for packaging and coupling.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical microcavity technical field, concretely relates to a separated microcavity sensing system packaging structure. BACKGROUND

[0002] Whispering Gallery Mode (WGM) optical microcavity has the advantages of high quality factor and small volume, is extremely sensitive to small environmental changes, and can realize accurate measurement of physical quantities such as temperature, pressure and refractive index, so it is highly concerned in the field of high-precision sensing. In order to establish WGM in the optical microcavity, the near-field evanescent wave of the coupling device is usually coupled with the microcavity. Among several typical coupling technologies of WGM optical microcavity (tapered fiber coupling, prism coupling and waveguide coupling, etc.), the coupling efficiency of tapered fiber coupling is higher, the output mode is less, and the adjustment operation in the experiment is more simple, so it is the mainstream coupling mode at present.

[0003] However, the physical strength of the tapered optical fiber is relatively low, and it is easy to break under improper packaging. In addition, since the size of the optical fiber taper (or waveguide) and the optical microcavity is small (micron level), it is easily disturbed by the external environment (slight vibration, dust), and then the coupling characteristics change. Therefore, in actual application, a suitable coupling packaging structure needs to be designed to ensure the long-term stability of the coupling system characteristics.

[0004] The commonly used packaging method is point packaging, that is, at the coupling point, a local curing treatment is performed using ultraviolet glue with low refractive index; or the entire coupling system is wrapped together using ultraviolet glue. These methods make the ultraviolet glue directly contact the microcavity working surface and the waveguide, change the coupling conditions, and then change the coupling system characteristics.

[0005] Therefore, an encapsulation structure is needed to avoid direct contact of the ultraviolet glue with the microcavity working surface and the waveguide, and to ensure the stability of the coupling system characteristics. SUMMARY

[0006] The utility model discloses to solve the problem that the present point packaging method makes the coupling system characteristics change, and proposes a separated microcavity sensing system packaging structure, which is provided with a support A and a support B. After determining that the WGM is formed in the microcavity, the support A and the support B are fixed using ultraviolet glue, so that the ultraviolet glue does not contact the microcavity working surface and the waveguide for packaging coupling.

[0007] In order to realize the above-mentioned purpose, the utility model provides a kind of separated microcavity sensing system packaging structure, including support A and support B, the support A is used to place fiber taper, support A is concave structure, and the upper end of the horizontal section of support A is opened with stepped gap downwards, to form first platform and second platform, square groove is opened in the lateral surface of the horizontal section of support A, to form third platform, the height of first platform is greater than the height of second platform, and the height of second platform is greater than the height of third platform;

[0008] The support B is long strip structure, and the support B includes support section and connecting section, the connecting section is a character-shaped plate body, square gap is opened in the upper end face of connecting section, and the support section is detachably connected above square gap;

[0009] The support section is used to place optical microcavity sample, and the length of support section is greater than the length of square gap, and the lower end face of support section is connected with third platform.

[0010] Further, the first platform is symmetrically distributed on the two sides of third platform, the second platform is symmetrically distributed on the two sides of third platform, the first platform is next to second platform, and the first platform is located at the front end of second platform.

[0011] Further, the connecting section of support B is opened with connecting groove on the side away from square gap.

[0012] Connecting groove is opened, and bolt is arranged in connecting groove, so that support B can be connected with micro-assembly platform, and user operation is facilitated.

[0013] Further, the support section includes single-end support section and double-end support section, the single-end support section is rectangular structure, and the double-end support section is back-shaped structure.

[0014] Single-end support section is used for fixing single-end optical microcavity sample, and double-end support section is used for fixing double-end optical microcavity sample.

[0015] Further, it further includes support C, the support C includes connecting part and fixed part, the fixed part is a character-shaped structure, and bolt hole is opened in the fixed part, the connecting part is L-shaped structure, and the connecting part and the fixed part are integrated structure.

[0016] Support C is arranged to transfer prepared fiber taper from above flame port, and bolt hole is arranged in the fixed end of support C, so that support C can be connected with micro-assembly platform, and user operation is facilitated.

[0017] Further, it further includes sealing box. According to the requirement, stable optical microcavity sensing system is installed in the sealing box.

[0018] Further, the two vertical sections of the support A are provided with circular through holes.

[0019] The circular through holes are provided with bolts, which facilitates the connection of the support A with the micro-assembly platform and facilitates the operation of the user.

[0020] Through the above technical scheme, the utility model has the beneficial effects that:

[0021] The utility model discloses a kind of separated microcavity sensing system packaging structures, including support A and support B, support A is used to fix and place optical fiber cone, support B is used to fix and place optical microcavity sample, support A and support B are connected by micro-assembly platform, and support A and support B are fixed by ultraviolet glue. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is one of structural schematic diagram of the separated microcavity sensing system packaging structure of the utility model.

[0023] Figure 2 It is two of structural schematic diagram of the separated microcavity sensing system packaging structure of the utility model.

[0024] Figure 3 It is the schematic diagram of support A of the separated microcavity sensing system packaging structure of the utility model.

[0025] Figure 4 It is the schematic diagram of support B of the separated microcavity sensing system packaging structure of the utility model.

[0026] Reference numeral: 1 is first platform, 2 is second platform, 3 is third platform, 4 is support section, 5 is connecting section, 6 is connecting groove, 7 is connecting part, 8 is fixed part, 9 is sealing box. DETAILED DESCRIPTION

[0027] Example 1

[0028] As Figures 1-4As shown, a separated microcavity sensing system packaging structure includes a support A and a support B, the support A is used for placing a fiber taper, the support A is a concave structure, a stepped gap is formed on the upper end surface of the lateral section of the support A, forming a first platform 1 and a second platform 2, a square groove is formed on the side surface of the lateral section of the support A, forming a third platform 3, the height of the first platform 1 is greater than the height of the second platform 2, and the height of the second platform 2 is greater than the height of the third platform 3;

[0029] The support B is a long strip structure, the support B includes a support section 4 and a connecting section 5, the connecting section 5 is a one-word plate body, a square gap is formed on the upper end surface of the connecting section 5, and the support section 4 is detachably connected above the square gap;

[0030] The support section 4 is used for placing an optical microcavity sample, the length of the support section 4 is greater than the length of the square gap, and the lower end surface of the support section 4 is connected with the third platform 3.

[0031] The first platform 1 is symmetrically distributed on both sides of the third platform 3, the second platform 2 is symmetrically distributed on both sides of the third platform 3, the first platform 1 is adjacent to the second platform 2, and the first platform 1 is located at the front end of the second platform 2.

[0032] A connecting groove 6 is formed on the side of the connecting section 5 of the support B away from the square gap.

[0033] The support section 4 includes a single-end support section and a double-end support section, the single-end support section is a rectangular structure, and the double-end support section is a back-shaped structure.

[0034] It also includes a support C, the support C includes a connecting part 7 and a fixing part 8, the fixing part 8 is a one-word structure, a bolt hole is formed on the fixing part 8, the connecting part 7 is an L-shaped structure, and the connecting part 7 and the fixing part 8 are an integrated structure.

[0035] It also includes a sealing box 9.

[0036] Round through holes are formed on the two vertical sections of the support A.

[0037] The operation process is as follows:

[0038] A fiber taper is prepared by using a flame tapering device. The prepared fiber taper is transferred from above the flame port by using the support C. The fiber taper is fixed on the first platform 1 by using ultraviolet glue. Figure 1 and 2 A straight line in the middle of Figure 1 and 2 A CO2 laser is used to prepare an optical microcavity sample. The optical microcavity sample is transferred from the clamp, and the optical microcavity sample is placed on the support section 4 of the support B.The support section 4 is fixed to the support B with a dot in the middle. The support A is installed on the micro-assembly platform A by bolts, the connecting section 5 of the support B is fixed to the micro-assembly platform B by bolts, and the connecting section 5 and the support section 4 are fixed by double-sided adhesive. The position of the support A is adjusted by the micro-assembly platform A, and the position of the support B is adjusted by the micro-assembly platform B, so that the near-field evanescent wave of the fiber taper is coupled to the optical microcavity optical microcavity sample and the whispering gallery mode is formed at the interface of the optical microcavity sample. The support section 4 is cured with the third platform 3 by ultraviolet glue, so that the relative position of the fiber taper and the optical microcavity optical microcavity sample is kept unchanged, and then a stable optical microcavity sensing system coupling structure is obtained. The optical microcavity sensing system is installed in the sealed box 9 (if the open environment parameters are detected, the microcavity sensing system is fixed in the detection area through the round hole of the support A) for subsequent sensing experiments.

[0039] The above-described embodiments are only preferred embodiments of the present application, and are not intended to limit the scope of the present application. Therefore, equivalent changes or modifications made in accordance with the structure, features and principles described in the patent range of the present application should be included in the patent range of the present application.

Claims

1. A packaging structure for a split microcavity sensing system, characterized in that, It includes support A and support B, the support A is used for placing optical fiber cone, support A is concave structure, the upper end of the horizontal section of support A is downwardly opened with stepped gap, forming first platform (1) and second platform (2), the side of the horizontal section of support A is opened with square slot, forming third platform (3), the height of first platform (1) is greater than the height of second platform (2), the height of second platform (2) is greater than the height of third platform (3); The support B is long strip structure, support B includes support section (4) and connecting section (5), the connecting section (5) is a one-shaped plate body, the upper end surface of connecting section (5) is opened with square gap, the upper side of square gap is detachably connected with support section (4); The support section (4) is used for placing optical microcavity sample, the length of support section (4) is greater than the length of square gap, the lower end surface of support section (4) is connected with third platform (3).

2. The packaged structure of claim 1, wherein the microcavity is a Fabry-Perot microcavity. The first platform (1) is symmetrically distributed on both sides of third platform (3), the second platform (2) is symmetrically distributed on both sides of third platform (3), the first platform (1) is adjacent to second platform (2), and the first platform (1) is located at the front end of second platform (2).

3. The packaging structure of a split microcavity sensing system according to claim 1, characterized in that, The connecting section (5) of support B is opened with connecting groove (6) on the side away from square gap.

4. The microcavity sensor system package of claim 1, wherein, The support section (4) includes single-end support section and double-end support section, the single-end support section is rectangular structure, and the double-end support section is back-shaped structure.

5. The packaging structure of a split microcavity sensing system according to claim 1, characterized in that, It also includes support C, the support C includes connecting part (7) and fixed part (8), the fixed part (8) is one-shaped structure, the fixed part (8) is opened with bolt hole, the connecting part (7) is L-shaped structure, and the connecting part (7) and the fixed part (8) are integrated structure.

6. The packaging structure of a split microcavity sensing system according to claim 1, characterized in that, It also includes sealing box (9).

7. The packaging structure for a split microcavity sensing system according to claim 1, characterized in that, The upper of two vertical sections of support A is opened with circular through hole.

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