阅读说明：本技术 一种带锁紧的可多维度精密调节的光纤耦合器 (Locking optical fiber coupler capable of being precisely adjusted in multiple dimensions ) 是由 李庆鹏 翟跃阳 俞上 周明媞 钟志鹏 于 2021-11-18 设计创作，主要内容包括：本发明公开了一种带锁紧的可多维度精密调节的光纤耦合器,包括箱体,所述箱体上部固定安装有光纤接头,所述箱体内活动连接有偏移板,所述偏移板上放置有透镜单元,所述偏移板上方在所述箱体内设有偏转调节机构,所述透镜单元侧面在所述箱体内设有微调机构,本发明体积较小,不依赖于额外的移动平台辅助调节,便于集成到其他光学装置中,有益于实现光学装置的小型化,本发明可以灵活稳定地调节六个自由度,且小螺距的精密细牙调节螺钉配合法向的紧定螺钉的定位锁紧功能,提高了装置的稳定性。(The invention discloses a locking multi-dimensional precision-adjustable optical fiber coupler which comprises a box body, wherein an optical fiber connector is fixedly installed at the upper part of the box body, an offset plate is movably connected in the box body, a lens unit is placed on the offset plate, a deflection adjusting mechanism is arranged in the box body above the offset plate, and a fine adjusting mechanism is arranged on the side face of the lens unit in the box body.)

1. The utility model provides a but accurate adjustment's of multidimension degree optical fiber coupler of area locking which characterized in that: including box (1), box (1) upper portion fixed mounting has optical fiber splice (14), swing joint has skew board (9) in box (1), lens unit (A) has been placed on skew board (9), skew board (9) top is in be equipped with deflection adjustment mechanism (20) in box (1), lens unit (A) side is in be equipped with fine-tuning (21) in box (1).

2. The locked multi-dimensional fine-tunable fiber coupler according to claim 1, wherein: the deflection adjusting mechanism (20) comprises a plurality of pairs of cylindrical pins (3) which are uniformly distributed and fixed between the deflection plate (9) and the box body (1), each pair of cylindrical pins (3) are connected through an extension spring (10), a plurality of positioning screws (15) are arranged in the box body (1) through internal threads, and the positioning screws (15) penetrate through the box body (1) and are in contact with the upper surface of the deflection plate (9).

3. The locked multi-dimensional fine-tunable fiber coupler according to claim 1, wherein: fine-tuning (21) include lens unit (A) side space internal fixation's spring steel piece (11), box (1) side-mounting has locking screw (12) that the top runs through to spring steel piece (11), box (1) side is equipped with mutually perpendicular and runs through to two adjusting screw (13) of mounting box (5) side.

4. The locked multi-dimensional fine-tunable optical fiber coupler according to claim 2, wherein: the number of the positioning screws (15) is not less than three.

5. The locked multi-dimensional fine adjustable optical fiber coupler according to claim 3, wherein: the tail parts of the adjusting screw (13) and the locking screw (12) are both ball heads.

6. The locked multi-dimensional fine-tunable optical fiber coupler according to claim 2, wherein: a plurality of first fastening screws (16) are installed on the side face of the box body (1), and the first fastening screws (16) vertically prop against the side face of the positioning screw (15) respectively.

7. The locked multi-dimensional fine adjustable optical fiber coupler according to claim 3, wherein: and a second fastening screw (17) is arranged above the adjusting screw (13) in the box body (1) through internal threads, and the second fastening screw (17) vertically props against the side surface of the adjusting screw (13).

8. The locked multi-dimensional fine-tunable fiber coupler according to claim 1, wherein: the lens unit (A) comprises a mounting box (5), a magnet ring (6), a lens (7) and a lens cover (8), the magnet ring (6) is mounted in the mounting box (5), the lens cover (8) is mounted above the magnet ring (6), the mounting box (5) and the lens cover (8) are made of magnetic stainless steel materials, and the lens (7) is fixed between the magnet ring (6) and the lens cover (8).

9. The locked multi-dimensional fine-tunable optical fiber coupler according to claim 2, wherein: the offset plate (9) is made of a magnetic stainless steel material, and the lens unit (A) is magnetically adsorbed on the upper surface of the offset plate (9) through a magnet ring (6).

10. The locked multi-dimensional fine-tunable fiber coupler according to claim 1, wherein: the optical fiber connector is characterized in that the box body (1) is fixedly connected with an upper panel (2) through a plurality of fixing screws (4), and the optical fiber connector (14) is pressed and fixed on the box body (1) through the upper panel (2).

Technical Field

The invention relates to the technical field of laser, in particular to a locking optical fiber coupler capable of being precisely adjusted in multiple dimensions.

Background

At present, the application of laser technology is very wide, and in the fields of medical treatment, astronomy, scientific research, national defense and the like, laser is often required to be coupled into an optical fiber, and an optical fiber coupler is a key device for coupling the laser into the optical fiber. Single mode fibers are widely used due to their excellent properties, but the mode field diameter and numerical aperture of single mode fibers are very small, making it difficult to directly couple spatial light into single mode fibers, and therefore, fiber couplers are required to be accurately and stably adjustable.

The existing optical fiber coupler generally needs to be aligned with the lens and the optical fiber by means of a micro-nano moving platform, occupies a large space, is not beneficial to being used in an experimental environment with limited space, and most couplers are not locked by positioning and have poor stability. Therefore, the optical fiber coupler with small volume, multi-degree-of-freedom adjustment and good stability is designed, has important significance for stably improving the efficiency of coupling space light to a single-mode optical fiber, and is suitable for being integrated into other optical devices.

Disclosure of Invention

The invention aims to provide a locking optical fiber coupler capable of being precisely adjusted in multiple dimensions, so as to overcome the defects in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention discloses a locking type multi-dimensional precision-adjustable optical fiber coupler which comprises a box body, wherein an optical fiber connector is fixedly arranged at the upper part of the box body, an offset plate is movably connected in the box body, a lens unit is placed on the offset plate, a deflection adjusting mechanism is arranged in the box body above the offset plate, and a fine adjusting mechanism is arranged on the side surface of the lens unit in the box body.

Optionally, the deflection adjusting mechanism includes a plurality of pairs of cylindrical pins uniformly distributed and fixed between the deflection plate and the box body, each pair of cylindrical pins is connected through an extension spring, a plurality of positioning screws are arranged in the box body in an internal thread, the number of the positioning screws is not less than three, the positioning screws penetrate through the box body and are in contact with the upper surface of the deflection plate, the deflection plate can be adjusted through the positioning screws to realize deflection of the movable lens unit, and the box body and the deflection plate are connected through the installation of the cylindrical pins and the extension springs so as to control the moving distance of the deflection plate and improve the stability.

Optionally, the fine-tuning includes lens unit side space internal fixation's spring steel sheet, the box side-mounting has the locking screw that the top runs through to spring steel sheet, the box side is equipped with mutually perpendicular and runs through to two adjusting screw of mounting box side, adjusting screw with locking screw head portion is the bulb, adjusting screw is used for adjusting lens unit horizontal direction removal on the skew board, lens unit's position stability when adjusting screw moves can be guaranteed to the spring steel sheet.

Optionally, a plurality of first fastening screws are installed on the side face of the box body, the first fastening screws respectively and vertically prop against the side face of the positioning screw, second fastening screws are installed on the upper portion of the adjusting screw in the box body, and the second fastening screws vertically prop against the side faces of the adjusting screws.

Optionally, the lens unit comprises a mounting box, a magnet ring, a lens and a lens cover, the magnet ring is mounted in the mounting box, the lens cover is mounted above the magnet ring, the mounting box and the lens cover are made of magnetic stainless steel materials, and the lens is fixed between the magnet ring and the lens cover.

Optionally, the offset plate is made of a magnetic stainless steel material, and the lens unit is magnetically adsorbed on the upper surface of the offset plate through a magnet ring, so that the offset plate and the lens unit can be kept to move synchronously.

Optionally, the box body is fixedly connected with an upper panel through a plurality of fixing screws, and the optical fiber connector is fixedly pressed on the box body through the upper panel.

The invention has the beneficial effects that:

(1) the invention has smaller volume, does not depend on additional mobile platform for auxiliary adjustment, is convenient to be integrated into other optical devices, and is beneficial to realizing the miniaturization of the optical devices.

(2) The invention can flexibly and stably adjust six degrees of freedom, and the precise fine-tooth adjusting screw with small screw pitch is matched with the positioning and locking function of the normal set screw, thereby improving the stability of the device.

The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the internal structure of an embodiment of the present invention;

FIG. 3 is a schematic view of the embodiment of the present invention in the direction B-B of FIG. 2;

FIG. 4 is a schematic view in the direction of C-C of FIG. 3 according to an embodiment of the present invention;

in the figure: 1-box body, 2-upper panel, 3-cylindrical pin, 4-fixing screw, 5-mounting box, 6-magnet ring, 7-lens, 8-lens cover, 9-offset plate, 10-extension spring, 11-spring steel sheet, 12-locking screw, 13-adjusting screw, 14-optical fiber joint, 15-positioning screw, 16-first fastening screw, 17-second fastening screw, 20-deflection adjusting mechanism and 21-fine adjusting mechanism.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Referring to fig. 1-4, an embodiment of the present invention provides a locking type multi-dimensional precision adjustable optical fiber coupler, including a box body 1, an optical fiber connector 14 is fixedly installed on an upper portion of the box body 1, an offset plate 9 is movably connected in the box body 1, a lens unit a is placed on the offset plate 9, a deflection adjusting mechanism 20 is arranged above the offset plate 9 in the box body 1, and a fine adjusting mechanism 21 is arranged in the box body 1 on a side surface of the lens unit a.

The deflection adjusting mechanism 20 comprises a plurality of pairs of cylindrical pins 3 which are uniformly distributed and fixed between the deflection plate 9 and the box body 1, each pair of cylindrical pins 3 is connected through an extension spring 10, three positioning screws 15 which are uniformly distributed are arranged in the box body 1 through internal threads, the positioning screws 15 penetrate through the box body 1 and are in contact with the upper surface of the deflection plate 9, the deflection plate 9 can drive the lens unit A to deflect through adjustment of the positioning screws 15, and the box body and the deflection plate 9 are connected through installation of the cylindrical pins 3 and the extension springs 10, so that the moving distance of the deflection plate is controlled, and the stability is improved.

Fine-tuning 21 includes lens unit A side space internal fixation's spring steel sheet 11, 1 side-mounting of box has the top to run through to spring steel sheet 11 locking screw 12, 1 side of box is equipped with mutually perpendicular and runs through to two adjusting screw 13 of mounting box 5 sides, adjusting screw 13 with locking screw 12 afterbody is the bulb, adjusting screw 13 is used for adjusting lens unit A horizontal direction removal on skew board 9, lens unit A's stable in position when adjusting screw 13 moves can be guaranteed to spring steel sheet 11.

A plurality of first fastening screws 16 are installed on the side face of the box body 1, the first fastening screws 16 respectively and vertically prop against the side face of the positioning screw 15, second fastening screws 17 are installed on the upper portion of the adjusting screw 13 in the box body 1 through threads, the second fastening screws 17 vertically prop against the side face of the adjusting screw 13, and the first fastening screws 16, the second fastening screws 17 and the locking screws 12 are used for adjusting and locking positions after the adjustment is completed.

The lens unit A comprises a mounting box 5, a magnet ring 6, a lens 7 and a lens cover 8, wherein the magnet ring 6 is mounted in the mounting box 5, the lens cover 8 is mounted above the magnet ring 6, the mounting box 5, the lens cover 8 and the offset plate 9 are all made of magnetic stainless steel materials, the lens 7 is fixed between the magnet ring 6 and the lens cover 8, and the lens unit A is magnetically adsorbed on the upper surface of the offset plate 9 through the magnet ring 6 and can keep the offset plate 9 and the lens unit A to move synchronously.

The box body 1 is fixedly connected with an upper panel 2 through a plurality of fixing screws 4, the optical fiber connector 14 is pressed and fixed on the box body 1 through the upper panel 2, and the upper part of the optical fiber connector 14 is obliquely processed.

The working process of the invention is as follows:

in the working process of the locked optical fiber coupler capable of being precisely adjusted in multiple dimensions, an optical fiber connector 14 is connected with an optical fiber through threads, a plurality of positioning screws 15 are synchronously adjusted to enable an offset plate 9 to translate up and down, a single positioning screw 15 is finely adjusted to enable the offset plate 9 to deflect, the offset plate 9 translates or deflects through adjustment of the positioning screw 15 to drive a lens unit A to translate or deflect, the process is coupled, the lens unit A and the offset plate 9 can be propped against relative movement through adjustment of two adjusting screws 13 which are perpendicular to each other, the position of the lens unit A is further adjusted to gradually enable space light and the optical fiber to achieve the optimal coupling efficiency, after the optimal coupling efficiency is obtained, a locking screw is adjusted to enable the locking screw to prop against a spring steel sheet 11 to lock the position of the lens unit A, in addition, a first fastening screw 16 is adjusted to prop against the side surface of the positioning screw 15 to prevent the positioning screw 15 from rotating, adjusting the second fastening screw 17 and pushing against the adjusting screw 13 to prevent the adjusting screw 13 from rotating, so that the position of the lens unit A can be further locked, the lens unit A is prevented from being mistakenly touched and vibrated to move, and the stability of the device is improved.

The offset plate 9 is vertically translated or obliquely deflected by adjusting the positioning screw 15, so that the lens unit A can be adjusted in three degrees of freedom (movement in the Z-axis direction, rotation in the X-axis direction and rotation in the Y-axis direction), the lens unit A can be adjusted in two degrees of freedom (movement in the X-axis direction and movement in the Y-axis direction) by adjusting the two adjusting screws 13, the optical fiber connector 14 can be rotated by unscrewing the fixing screw 4, the optical fiber connector 14 and the lens unit A can relatively rotate in the Z-axis direction, and the adjustment of the sixth degree of freedom is realized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.