A fiber optic integrated module and spectrometer system

Abstract

This utility model discloses an integrated fiber optic module and a spectrometer system. The integrated fiber optic module includes plug posts containing multiple incident optical fibers arranged in a straight line. The other end of each incident optical fiber is connected to a light source optical fiber and an interface optical fiber via an optical fiber coupler. All optical fiber couplers are integrated into a fiber optic coupling module. The other end of all interface optical fibers is connected to the same optical fiber connector. The other end of the light source optical fiber is connected to a light source optical fiber connector. This utility model has advantages such as reasonable structural design, ease of connecting multiple optical fibers, and simplified wiring.

Description

Technical Field

[0001] This utility model relates to the field of spectrometer technology, and in particular to an optical fiber integrated module and a spectrometer system. Background Technology

[0002] A fiber optic sensor is a sensor that converts the state of a measured object into a measurable optical signal. The working principle of a fiber optic sensor is to send a light beam incident from a light source through an optical fiber into a modulator. Within the modulator, the light interacts with the external measured parameters, causing changes in the optical properties of the light, such as intensity, wavelength, frequency, phase, and polarization state, resulting in a modulated optical signal. This modulated signal is then sent through an optical fiber to a photoelectric device and, after passing through a demodulator, the measured parameters are obtained.

[0003] Currently, demodulation of fiber optic sensors, especially those based on the Fabry-Perot principle, primarily employs spectrometers. Typically, a single spectrometer can only demodulate one fiber optic path. However, in practical engineering, it's often necessary to detect multiple parameters at multiple monitoring or detection points, requiring the use of multiple fiber optic sensors of different types for separate detection. To demodulate each fiber optic sensor, multiple spectrometers are also needed, resulting in a complex and bulky system architecture. Therefore, the applicant has designed a spectrometer capable of simultaneously demodulating multiple side-by-side fiber optic paths. However, efficiently connecting multiple fiber optic paths to the spectrometer remains a critical challenge. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide an optical fiber integrated module and spectrometer system with a reasonable structural design, which is convenient for connecting multiple optical fibers and facilitates the simplification of wiring.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An integrated fiber optic module is characterized in that it includes a plug post, wherein the plug post has multiple incident optical fibers arranged in a straight line, and the other end of each incident optical fiber is connected to a light source optical fiber and an interface optical fiber through an optical fiber coupler. All the optical fiber couplers are integrated into an optical fiber coupling module, and the other end of all the interface optical fibers is connected to the same optical fiber connector. The other end of the light source optical fiber is connected to a light source optical fiber connector.

[0006] In the above structure, multiple incident optical fibers are arranged in a straight line within the connector posts, allowing direct connection of these fibers to the spectrometer. Simultaneously, the incident fibers are connected to the source fiber and interface fiber via fiber optic couplers, while all interface fibers are connected to the same fiber optic connector. When the number of fiber optic sensors does not exceed the number of incident fibers, simply connecting all the fiber optic sensors to the matching fiber optic connector allows for rapid and efficient connection of multiple fiber optic sensors.

[0007] Furthermore, the other end of all the aforementioned light source optical fibers is connected to the same light source optical fiber connector.

[0008] Furthermore, the cross-sectional shape of the plug is a centrally symmetrical figure, and the center of symmetry is located at the center of the arrangement of the plurality of incident optical fibers.

[0009] In this way, the plug can be inserted in both the forward and reverse directions.

[0010] Furthermore, the end of the plug has a circular receiving cavity, and a circular light-shielding plate is disposed in the receiving cavity. The light-shielding plate has slits that correspond to the plurality of incident optical fibers.

[0011] A spectrometer system, characterized in that it includes a spectrometer, the spectrometer including a housing, the housing having a through-hole, and a guide insertion hole extending outward in the same direction at one end of the entrance hole; an optical fiber integrated module as described above is detachably inserted into the guide insertion hole.

[0012] Furthermore, the housing is sequentially provided with a collimation module, a beam splitting module, a focusing module, and an area array detection module; the focusing module includes a primary focusing lens group for imaging the split spectrum and a secondary focusing lens group for focusing the imaging spectrum along the length direction of the slit; the area array detection modules are spaced behind the secondary focusing lens group, so that there is a gap between the spectra of two adjacent optical fibers imaged on the area array detection module.

[0013] In this way, multiple optical fibers are arranged side by side along the length of the slit, allowing the signal light from the fibers to be spatially separated. After passing through the slit, the signal light is converted into a parallel beam by the collimation module and enters the beam splitting module at a uniform incident angle. The beam splitting module spreads the light into spatially distributed monochromatic light according to wavelength. The split light then undergoes two-stage focusing processing by the focusing module. The primary focusing lens group initially images the spectrum as continuous spectral lines, while the secondary focusing lens group compresses it longitudinally along the length of the slit, causing the spectra of each fiber to form parallel spectral lines with gaps on the area array detector module. Finally, the intensity-wavelength two-dimensional distribution of the multi-channel light is synchronously captured by the detector pixel matrix, achieving efficient and low-crosstalk spectral analysis.

[0014] Furthermore, the secondary focusing lens group is a cylindrical lens, and the geometric axis of the cylindrical lens is consistent with the wavelength extension direction of any spectrum on the area array detection module, so that there is a gap between the imaging spectrum of two adjacent optical fibers on the area array detection module.

[0015] In this way, for any spectrum imaged by a single focusing module, the cylindrical lens can ensure that the overall length of the spectral wavelength extension direction remains unchanged, while narrowing the width of the spectrum. This allows for the creation of gaps between adjacent spectra while maintaining the accuracy of spectral recognition, thereby avoiding interference between spectra.

[0016] Furthermore, one end of the cylindrical lens is deflected toward the area array detection module, so that the width of the imaging spectrum of any optical fiber on the area array detection module is uniform throughout.

[0017] In this way, by deflecting the cylindrical lens, light of different wavelengths can be refracted through the cylindrical lens to form a clear and consistent spectrum, which helps to ensure accuracy.

[0018] Furthermore, the guide insertion hole or insertion post has an anti-misalignment groove extending along the insertion direction, and the insertion post or guide insertion hole has an anti-misalignment ridge corresponding to the anti-misalignment groove; the insertion post and guide insertion hole form an anti-misalignment structure through the cooperation of the anti-misalignment groove and the anti-misalignment ridge.

[0019] Furthermore, the housing is provided with a locking mechanism, which includes a threaded hole through the guide insertion hole and a locking bolt in the threaded hole, with the end of the locking bolt facing the guide insertion hole.

[0020] In summary, this utility model has the advantages of reasonable structural design, easy connection of multiple optical fibers, and simplified wiring. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this embodiment.

[0022] Figure 2 for Figure 1 A top-view structural diagram.

[0023] Figure 3 This is a schematic diagram of the fiber optic integrated module.

[0024] Figure 4 This is a schematic diagram of the optical path principle of an optical fiber signal in this embodiment.

[0025] Figure 5 This is a schematic diagram of the optical path principle of multiple optical fiber signals in this embodiment.

[0026] Figure 6 This is a schematic diagram of the spectrum of the area array detection module without the secondary focusing lens group.

[0027] Figure 7 This is a schematic diagram of the spectrum of the area array detection module in the state of parallel configuration of secondary focusing lens groups.

[0028] Figure 8 This is a schematic diagram of the spectrum of the array detection module when the secondary focusing lens group is tilted.

[0029] Figure 9 This is a schematic diagram of another structure of a spectrometer. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to a spectrometer system employing the structure of the present invention.

[0031] like Figures 1-9 As shown, a spectrometer system includes a spectrometer and an optical fiber integrated module 2. The spectrometer includes a housing 1 with a through-hole 11. The housing 1 has an optical channel communicating with the through-hole 11. A collimation module 13, a beam splitting module 14, a focusing module 15, and an area array detection module 16 are sequentially arranged in the optical channel along a direction away from the through-hole 11.

[0032] The entrance aperture 11 has a guide insertion hole 12 extending outward in the same direction at one end. The fiber optic integrated module 2 includes a insertion post 21 that matches the guide insertion hole 12. The insertion post 21 contains multiple incident optical fibers 22 arranged in a straight line. The end of the insertion post 21 has a circular receiving cavity, and a circular light-shielding plate is provided in the receiving cavity. The light-shielding plate has slits corresponding to the multiple incident optical fibers 22. The insertion post 21 is axially movable and inserted into the guide insertion hole 12, and is fixed in the guide insertion hole 12 by an adhesive or locking mechanism. In this embodiment, the housing 1 is provided with a locking mechanism, which includes a threaded hole that penetrates the wall of the guide insertion hole 12 and a locking bolt provided in the threaded hole. The end of the locking bolt faces the guide insertion hole 12. Specifically, the guide insertion hole 12 has two coaxially arranged threaded holes on its wall, and each threaded hole is equipped with a locking bolt. In this way, after the insertion post is adjusted into place, the locking bolts can be used to firmly fix the insertion post in the guide insertion hole.

[0033] In this embodiment, the cross-sectional shape of the plug 21 is a centrally symmetrical figure, and the center of symmetry is located at the arrangement center of the plurality of incident optical fibers 22. This allows the plug to mate with the guide plug hole in both directions. Specifically, to ensure reliable insertion direction between the plug 21 and the guide plug hole 12, the following error-proof structure can be adopted: the guide plug hole 12 or the plug 21 has an error-proof groove extending along the insertion direction, and the plug 21 or the guide plug hole 12 has an error-proof ridge corresponding to the error-proof groove; the plug 21 and the guide plug hole 12 form an error-proof structure through the cooperation of the error-proof groove and the error-proof ridge.

[0034] like Figure 3 As shown, the other end of each incident fiber 22 is connected to a light source fiber 24 and an interface fiber 25 via a fiber optic coupler 23. All fiber optic couplers 23 are integrated into a fiber optic coupling module. The other end of all interface fibers 25 is connected to the same fiber optic connector 26. The other end of all light source fibers 24 is connected to the same light source fiber optic connector. By connecting each incident fiber to the light source fiber and the interface fiber via fiber optic couplers, and connecting all interface fibers to the same fiber optic connector, when the number of fiber optic sensors does not exceed the number of incident fibers, it is only necessary to connect all the fibers of the fiber optic sensors to the matching fiber optic connector. By plugging in the fiber optic connector, multiple fiber optic sensors can be quickly connected, making the operation highly efficient.

[0035] The focusing module 15 includes a primary focusing lens group 151 for imaging the spectrum after spectral splitting and a secondary focusing lens group 152 for focusing the imaging spectrum along the length of the slit. The area array detector module 16 is spaced behind the secondary focusing lens group 152, so that there is a gap between the spectra of two adjacent optical fibers imaged on the area array detector module 16. Multiple optical fibers are arranged side by side along the length of the slit, so that the signal light of the optical fibers is spatially separated from each other. After the signal light passes through the slit, it is converted into a parallel beam by the collimation module and enters the spectral splitting module at a uniform incident angle. The spectral splitting module spreads the light into spatially distributed monochromatic light according to wavelength. The split light is then subjected to two-stage focusing processing by the focusing module. The primary focusing lens group initially images the spectrum as continuous spectral lines, and the secondary focusing lens group compresses it longitudinally along the length of the slit, so that the spectra of each optical fiber form parallel spectral lines with gaps on the area array detector module. Finally, the intensity-wavelength two-dimensional distribution of the multi-channel light is synchronously captured by the detector pixel matrix, realizing efficient and low crosstalk spectral analysis.

[0036] In this embodiment, the secondary focusing lens group 152 is a cylindrical lens. The geometric axis of the cylindrical lens is aligned with the wavelength extension direction of any spectrum on the area array detection module 16, creating a gap between the imaging spectra of two adjacent optical fibers on the area array detection module 16. For any spectrum imaged by the primary focusing module, the cylindrical lens ensures that the overall length of the spectral wavelength extension direction remains unchanged while narrowing the spectral width. This allows for the creation of gaps between adjacent spectra while maintaining spectral recognition accuracy, thereby avoiding interference between spectra. Figure 6 and Figure 7 As shown.

[0037] Simultaneously, one end of the cylindrical lens is deflected towards the area array detection module 16, ensuring that the width of the imaging spectrum of any optical fiber on the area array detection module 16 is uniform throughout. In this way, by deflecting the cylindrical lens, light of different wavelengths can form a clear and uniformly wide spectrum after refraction through the lens, which helps to ensure accuracy. Figure 8 As shown.

[0038] In this embodiment, as Figure 2As shown, a reflector is positioned directly opposite the fiber optic module. The optical signal is reflected by the reflector and reaches the collimation module 13. After collimation by the collimation module 13, it is reflected to the beam splitter module 14. The beam splitter module 14 splits the light and reflects it to the primary focusing lens group 151. The primary focusing lens group 151 focuses and reflects the light of each wavelength, and then the light is refocused by the secondary focusing lens group 152, forming a spectrum on the area array detector module 16. In this embodiment, the collimation module 13, beam splitter module 14, primary focusing lens group 151, and area array detector module 16 are all mature existing products. Under different optical path arrangements, the collimation module 13 can be a spherical lens, an aspherical lens, an off-axis parabolic mirror, or a graded refractive index lens; the beam splitter module 14 can be a planar diffraction grating, a prism, an acousto-optic tunable filter, or a liquid crystal tunable filter; and the primary focusing lens group 151 can be a spherical lens, an aspherical lens, or an off-axis parabolic mirror.

[0039] 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 and improvements 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. An optical fiber integrated module, characterized in that, The device includes a plug (21), which contains multiple incident optical fibers (22) arranged in a straight line. The other end of each incident optical fiber (22) is connected to a light source optical fiber (24) and an interface optical fiber (25) via an optical fiber coupler (23). All the optical fiber couplers (23) are integrated into an optical fiber coupling module. The other end of all the interface optical fibers (25) is connected to the same optical fiber connector (26). The other end of the light source optical fiber (24) is connected to a light source optical fiber connector.

2. The fiber optic integrated module as described in claim 1, characterized in that, The other segment of all said light source optical fibers (24) is connected to the same light source optical fiber connector.

3. The fiber optic integrated module as described in claim 1, characterized in that, The cross-sectional shape of the plug (21) is a centrally symmetrical figure, and the center of symmetry is located at the center of the arrangement of the plurality of incident optical fibers (22).

4. The fiber optic integrated module as described in claim 1, characterized in that, The end of the plug (21) has a circular receiving cavity, and a circular light-shielding plate is provided in the receiving cavity. The light-shielding plate has slits that correspond to the plurality of incident optical fibers (22).

5. A spectrometer system, characterized in that, The spectrometer includes a housing (1) with a through-hole (11) on the housing (1) and a guide insertion hole (12) extending outward in the same direction at one end of the through-hole (11); the guide insertion hole (12) is detachably connected to an optical fiber integrated module as described in any one of claims 1 to 4.

6. The spectrometer system as described in claim 5, characterized in that, The housing (1) is provided with a collimation module (13), a beam splitting module (14), a focusing module (15), and an area array detection module (16) in sequence. The focusing module (15) includes a primary focusing lens group (151) for imaging the spectrum after beam splitting and a secondary focusing lens group (152) for focusing the imaging spectrum along the length direction of the slit. The area array detection modules (16) are arranged at intervals behind the secondary focusing lens group (152) so that there is a gap between the spectra of two adjacent optical fibers imaged on the area array detection module (16).

7. The spectrometer system as described in claim 6, characterized in that, The secondary focusing lens group (152) is a cylindrical lens, and the geometric axis of the cylindrical lens is consistent with the wavelength extension direction of any spectrum on the array detection module (16), so that there is a gap between the imaging spectrum of two adjacent optical fibers on the array detection module (16).

8. The spectrometer system as described in claim 7, characterized in that, One end of the cylindrical lens is deflected toward the area array detection module (16), so that the width of the imaging spectrum of any optical fiber on the area array detection module (16) is uniform throughout.

9. The spectrometer system as described in claim 5, characterized in that, The guide insertion hole (12) or the insertion post (21) has an anti-misalignment groove extending along the insertion direction, and the insertion post (21) or the guide insertion hole (12) has an anti-misalignment ridge corresponding to the anti-misalignment groove; the insertion post (21) and the guide insertion hole (12) form an anti-misalignment structure through the cooperation of the anti-misalignment groove and the anti-misalignment ridge.

10. The spectrometer system as described in claim 9, characterized in that, The housing (1) is provided with a locking mechanism, which includes a threaded hole through the guide insertion hole (12) and a locking bolt provided in the threaded hole, with the end of the locking bolt facing the guide insertion hole (12).

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