TWM610642U - Optical communication module - Google Patents

Abstract

This creation relates to an optical communication module, including: a light guide, including at least one first light window, a first reflection surface corresponding to the at least one first light window, and at least one pair of vortices corresponding to the first reflection surface A lens, the first reflecting surface and the at least one vortex lens are integrally formed on the light guide; and an optical fiber connector, which is detachably connected to the light guide, includes a lens disposed opposite to the at least one vortex lens The optical fiber guiding part is used for connecting at least one optical fiber.

Description

Optical communication module

This creative department is about an optical communication module.

Optical fiber communication has the advantages of good transmission efficiency, resistance to electromagnetic interference and high stability. Optical fiber can be divided into single-mode fiber and multi-mode fiber according to the transmission method. The diameter of the multi-mode fiber is much larger than the wavelength of the light beam, thus allowing light beams of different wavelengths and phases to be reflected and transmitted along the peripheral wall of the fiber. After long-distance transmission There will be a difference in propagation speed between different modes, resulting in modal dispersion and excessively high luminous flux in the center of the fiber, thereby limiting the transmission distance.

In order to solve the aforementioned problems, a vortex phase plate is generally used to convert the passing beam into a vortex beam to prevent the light intensity from being concentrated in the central part of the optical fiber. However, the vortex phase plate is not easy to manufacture, and the conventional optical communication module needs to assemble multiple optical elements to complete the arrangement of the optical path. The slight deviation of the installation position of each optical element greatly affects the transmission path of the optical path, and it is difficult to accurately The location, processing is not easy, and the quality is not uniform, which in turn leads to poor transmission effects.

Therefore, it is necessary to provide a novel and progressive optical communication module to solve the above-mentioned problems.

The main purpose of this creation is to provide an optical communication module with a simple structure and good transmission effect.

To achieve the above objective, this creation provides an optical communication module, including: a light guide, including at least one first light window, a first reflecting surface corresponding to the at least one first light window, and at least one corresponding first light window. The vortex lens of the reflecting surface, the first reflecting surface and the at least one vortex lens are integrally formed on the light guide member; and an optical fiber connector, which is detachably connected to the light guide member, includes a vortex and the at least one vortex lens. The optical fiber guiding part is arranged opposite to the rotating lens, and the optical fiber guiding part is used for connecting at least one optical fiber.

The following examples are only used to illustrate the possible implementation of this creation, but they are not intended to limit the scope of the creation to be protected, and we will explain it first.

Please refer to FIGS. 1 to 9, which show a preferred embodiment of this invention. The optical communication module 1 of this invention includes a light guide 10 and an optical fiber connector 20.

The light guide 10 includes at least one first light window 11, a first reflecting surface 12 corresponding to the at least one first light window 11, and at least one vortex lens 13 corresponding to the first reflecting surface 12. The surface 12 and the at least one vortex lens 13 are integrally formed on the light guide 10; the optical fiber connector 20 is detachably connected to the light guide 10 and includes an optical fiber guide disposed opposite to the at least one vortex lens 13 The position part 21 is for connecting at least one optical fiber 2 to the optical fiber guide part 21. Thereby, the structure of the optical communication module 1 is simple and the transmission effect is good.

The first reflection surface 12 is a total reflection surface, and the first reflection surface 12 can produce a total reflection effect by, for example, adjusting the angle, coating, or installing a mirror surface. The light-transmitting area of each of the vortex lenses 13 is not greater than the light-transmitting area of each of the first light windows 11, so that a light beam entering from the at least one first light window 11 can be completely projected to the at least one vortex lens The range of 13 reduces the loss of light signal. In this embodiment, the number of the at least one first light window 11 is the same as the number of the at least one vortex lens 13; the light guide 10 includes a plurality of the vortex lenses 13 arranged in a straight line; the light guide 10 One side facing the optical fiber connector 20 is provided with a circumferentially closed concave portion 14. The plurality of vortex lenses 13 are accommodated in the concave portion 14 without being relatively protruding, so as to avoid interference from external light and prevent the plurality of vortex lenses 13 from being affected by Damaged by collision.

With reference to FIG. 4, the light beam can enter the light guide 10 through the at least one first light window 11, and then be reflected by the first reflecting surface 12 to the at least one vortex lens 13, and the at least one vortex lens 13 The light beam is converted into a vortex light beam and then enters the at least one optical fiber 2 for transmission, which can greatly reduce the luminous flux of the central portion of each optical fiber 2 and improve the problem of modal dispersion.

Preferably, a gap between any two adjacent vortex lenses 13 is less than or equal to 0.01 mm, so that the vortex beams of the vortex lenses 13 do not interfere. Each vortex lens 13 includes a spiral surface 132 spiraling around its axial direction 131 and a concave hole 133 (blind hole or perforation) spiraled by the spiral surface 132. The spiral surface 132 circulates to form a step 134. As a result, the light beam is not concentrated and the vortex is effectively and evenly dispersed in the ring portion of the vortex lens 13 surrounding the concave hole 133. The diameter of the bottom edge of the recessed hole 133 is greater than or equal to 0.001mm and less than or equal to 0.02mm; there is an arc guide surface 135 between the recessed hole 133 and the spiral surface 132, and the arc radius of the arc guide surface 135 is greater than or equal to 0.001mm and less than or equal to 0.02mm; the step difference 134 is greater than or equal to 5 micrometers (μm) and less than or equal to 20μm; the concave hole 133 includes a hole wall 136 which is opposite to the axial direction 131 of the scroll lens 13 A tilt angle θ1, the tilt angle θ1 is greater than or equal to 1 degree and less than or equal to 20 degrees; defines a reference plane P1 perpendicular to the axial direction 131 of the vortex lens 13, the tangent direction of an outer edge of the arc guide surface 135 T1 and the reference plane P1 define a first included angle θ2, the tangential direction T2 of an outer edge of the spiral surface 132 and the reference plane P1 define a second included angle θ3, the first included angle θ2 is greater than the second included angle θ3; The first included angle θ2 is not less than 17.0 degrees, and the second included angle θ3 is not less than 0.70 degrees. Preferably, the first included angle θ2 is about 17.2 degrees, and the second included angle θ3 is about 0.72 degrees; the above-mentioned scale conditions are favorable Because the beam uniformly disperses the vortex, it also allows processing under the best precision conditions (for example, using a diamond tool) for forming the mold of the vortex lens 13, so that the mold is easy to be processed and manufactured, and the draft is smooth (due to the tilt angle). In an embodiment of processing the mold for forming the scroll lens 13 with a diamond tool, considering that there is a processing limit when processing close to the center of the mold, the side of the diamond tool near the center of the mold is constructed to have a relatively high The small arc angle radius of the cutting edge on the opposite side can reduce the natural arc angle radius produced by machining to less than 1μm, which is beneficial to machining precision and product miniaturization. In addition, the center of the mold can also have a concave hole, and the center of the formed vortex lens forms a relative protrusion. The concave hole of the mold is formed by laser processing, for example, but it can also be made by other processing methods.

With reference to FIG. 5, the light guide 10 further includes a second reflective surface 15 at least partially corresponding to the at least one first light window 11, a third reflective surface 16, and at least one corresponding to the third reflective surface 16. The light exit window 17, the second reflective surface 15 is used to partially reflect a light beam from the first light window 11 to the third reflective surface 16 and from the third reflective surface 16 to the at least one light exit window 17. Thereby, the light beam can enter the light guide 10 through the at least one first light window 11, and then is partially reflected to the at least one light exit window 17 by the second reflective surface 15 and the third reflective surface 16 to be projected to a The detection element 3 monitors the light energy, intensity, or optical properties of the beam. In this embodiment, the second reflective surface 15 corresponds to a portion of the at least one first light window 11 in a width direction W of the light guide 10, so that the amount of light reflected to the at least one light exit window 17 can be reduced. Reduce the loss of optical signal. Of course, the second reflective surface can also correspond to all of the at least one first light window in the width direction.

The optical fiber connector 20 further includes at least one second optical window 22 facing the at least one vortex lens 13 and a groove 23 provided between the optical fiber guide portion 21 and the at least one second optical window 22, the The optical fiber guiding portion 21 extends toward the groove 23 and communicates with the groove 23, and the at least one optical fiber 2 can be extended into the groove 23 by the optical fiber guiding portion 21 and is connected to the at least one second optical window 22 Corresponding to transmit light signals. Preferably, a glue 24 is connected between at least one end surface of the optical fiber 2 and a side wall of the groove 23 facing the end surface, as shown in FIG. 5, to reduce the refraction loss of the light beam entering the air.

The at least one first light window 11 and the at least one light exit window 17 are provided at a bottom of the light guide 10, and the light guide 10 further includes a cavity 19 recessed inward from the bottom, which is mounted on A circuit device 4 can accommodate protruding passive components. The circuit device 4 can be provided with the detection element 3, a light receiver, and a light emitter 5 capable of emitting the light beam, etc., and the light guide 10 The position can be aligned and then joined to the circuit device 4 and can be used directly. A flange 18 is provided on the outer periphery of the light guide 10, and a glue can be filled between the flange 18 and the circuit device 4 for mutual attachment, and the excess glue can overflow outward along the circumference of the flange 18; The flange 18 is provided with a plurality of notches 181 gradually expanding along a thickness direction at intervals, which is convenient for secondary dispensing and has good connection strength. Preferably, the light guide 10 further includes a convex portion 191 protrudingly provided on the outer periphery of the cavity 19 along the thickness direction, which can effectively prevent the glue from overflowing into the cavity 19. At least one notch 182 is recessed on two opposite side walls of the light guide 10, which can be used for holding and applying force during installation or disassembly. One of the light guide 10 and the optical fiber connector 20 is provided with at least one guide protrusion 30a, and the other is provided with at least one guide recess 30b that can be detachably connected to the at least one guide protrusion 30a, facilitating alignment connection. Each of the first light windows 11 and each of the second light windows 22 can be configured as a focusing lens or a collimating lens according to the transmission direction of the light beam, thereby achieving the purpose of two-way transmission and reception. The light guide 10 and the optical fiber connector 20 are respectively an integral single component, which is easy to manufacture and can reduce the configuration deviation of each optical element.

Please refer to Figure 10, which shows the evenly dispersed vortex effect of the light beam produced by the vortex lens of the communication module of this creation. Figure 10 clearly shows that due to the spiral surface of the vortex lens, the light is uniformly dispersed spirally, and due to the intermediate structure of the vortex lens (such as concave holes or convex columns), the light is evenly dispersed around The periphery of the intermediate structure can prevent the beam from being excessively concentrated in the central part, and effectively solve the problem of modal dispersion and excessive luminous flux in the center of the fiber, which limits the transmission distance. Among them, through various numerical combinations of the diameter of the vortex lens, the angle of the spiral surface, the size of the intermediate structure, and the size of the step difference, different optical effects can be obtained.

1: Optical communication module 2: optical fiber 3: Detection element 4: Circuit device 5: Optical transmitter 10: Light guide 11: The first light window 12: The first reflecting surface 13: Vortex lens 131: Axial 132: Spiral 133: concave hole 134: step difference 135: Arc guide surface 136: Hole Wall 14: recess 15: second reflecting surface 16: third reflecting surface 17: light window 18: flange 181: Notch 182: missing slot 19: Cavity 191: Convex 20: Optical fiber connector 21: Optical fiber guide 22: second light window 23: Groove 24: glue 30a: guide convex 30b: guide recess P1: Reference plane T1, T2: Tangent direction W: width direction θ1: Tilt angle θ2: The first included angle θ3: The second included angle

Figure 1 is a perspective view of a preferred embodiment of the creation. Figure 2 is another perspective view of a preferred embodiment of the creation. Figure 3 is an exploded view of a preferred embodiment of the creation. Fig. 4 is a cross-sectional view taken along the line A-A of Fig. 1; Fig. 5 is a cross-sectional view taken along the line B-B of Fig. 1; Fig. 6 is a partial enlarged view of Fig. 5. Figure 7 is a perspective view of a light guide of a preferred embodiment created. Fig. 8 is a partial enlarged view of Fig. 7. Fig. 9 is a partial enlarged view of Fig. 8. FIG. 10 is a schematic diagram showing the effect of uniformly dispersing the vortex of the light beam generated by the vortex lens of the communication module of the present creation.

1: Optical communication module

10: Light guide

18: flange

181: Notch

20: Optical fiber connector

Claims (18)

An optical communication module, including: A light guide includes at least one first light window, a pair of first reflective surfaces corresponding to the at least one first light window, and at least one pair of vortex lenses corresponding to the first reflective surface, the first reflective surface and the at least one The vortex lens is integrally formed on the light guide; and An optical fiber connector, which is detachably connected to the light guide, includes an optical fiber guiding part arranged opposite to the at least one vortex lens, and the optical fiber guiding part is used for connecting at least one optical fiber. The optical communication module according to claim 1, wherein the light-transmitting area of each of the vortex lenses is not greater than the light-transmitting area of each of the first light windows. The optical communication module according to claim 1, wherein the first reflection surface is a total reflection surface. The optical communication module according to claim 1, wherein the optical fiber connector further includes at least one second optical window facing the at least one vortex lens and a second optical window disposed on the optical fiber guide portion and the at least one second optical window Between the groove, the optical fiber guide portion extends toward the groove and communicates with the groove. The optical communication module according to claim 4, wherein a glue material is connected between at least one end surface of the optical fiber and a side wall of the groove facing the end surface. The optical communication module according to claim 1, wherein the light guide member is provided with a circumferentially closed recessed portion facing one side of the optical fiber connector, and the at least one vortex lens is accommodated in the recessed portion. The optical communication module according to claim 1, wherein a flange is provided on the outer periphery of the light guide member, and a plurality of notches that gradually expand in a thickness direction are provided on the interval between the flanges. The optical communication module according to claim 1, wherein the light guide includes a plurality of the vortex lenses arranged in a straight line. The optical communication module according to any one of claims 1 to 8, wherein the light guide further includes a second reflective surface at least partially corresponding to the at least one first light window, a third reflective surface, and at least A light exit window corresponding to the third reflective surface, the second reflective surface for partially reflecting a light beam from the first light window to the third reflective surface and from the third reflective surface to the at least one light exit window. The optical communication module according to claim 5, wherein the light-passing area of each of the vortex lenses is not greater than the light-passing area of each of the first light windows; the number of the at least one light window is greater than the number of the at least one vortex lens The number is the same; the first reflection surface is a total reflection surface; the light guide member is provided with a circumferentially closed recessed portion facing one side of the optical fiber connector, and the at least one vortex lens is accommodated in the recessed portion without relatively protruding; The light guide is provided with a flange on the outer periphery, and the flange interval is provided with a plurality of notches that gradually expand in a thickness direction; the light guide includes a plurality of the vortex lenses arranged in a straight line; the light guide further includes A second reflective surface at least partially corresponding to the at least one first light window, a third reflective surface, and at least one light exit window corresponding to the third reflective surface, and the second reflective surface is provided for receiving a light from the first light The light beam from the window is partially reflected to the third reflective surface and from the third reflective surface to the at least one light exit window; the second reflective surface corresponds to a portion of the at least one light guide in a width direction of the light guide A light window; the at least one first light window and the at least one light exit window are provided at a bottom of the light guide; the light guide further includes a cavity recessed inward from the bottom; the light guide is further It comprises a convex part protrudingly arranged on the outer periphery of the cavity along the thickness direction; at least one notch is recessed on the opposite two side walls of the light guide part; the light guide part and the optical fiber connector are respectively integrally formed as a single member One of the light guide and the optical fiber connector is provided with a guide protrusion, and the other is provided with at least one guide recess that can be detachably connected to the at least one guide protrusion. The optical communication module according to any one of claims 1 to 8, wherein each of the vortex lenses includes a spiral surface spiraling around its axial direction and a concave hole spiraled by the spiral surface, and the spiral surface revolves And form a first-order difference. The optical communication module according to claim 11, wherein the diameter of the bottom edge of the hole is greater than or equal to 0.001 mm and less than or equal to 0.02 mm. The optical communication module according to claim 11, wherein an arc guide surface is formed between the concave hole and the spiral surface, and the arc radius of the arc guide surface is greater than or equal to 0.001 mm and less than or equal to 0.02 mm. The optical communication module according to claim 11, wherein the step difference is greater than or equal to 5 micrometers (μm) and less than or equal to 20 μm. The optical communication module according to claim 11, wherein the concave hole includes a hole wall, the hole wall forms an inclination angle with respect to the axial direction of the scroll lens, and the inclination angle is greater than or equal to 1 degree and less than or equal to 20 degrees . The optical communication module according to claim 11, wherein the light guide includes a plurality of the vortex lenses, and a gap between any two adjacent vortex lenses is less than or equal to 0.01 mm. The optical communication module according to claim 13, wherein a reference plane perpendicular to the axial direction of the vortex lens is defined, a tangent direction of an outer edge of the arc guide surface and the reference plane define a first angle, the The tangent direction of an outer edge of the spiral surface and the reference plane define a second included angle, and the first included angle is greater than the second included angle. The optical communication module according to claim 17, wherein the first included angle is not less than 17.0 degrees, and the second included angle is not less than 0.70 degrees.

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