1. A polarization maintaining optical fiber assembly apparatus, comprising:

the turnover clamp comprises a clamp base, an optical fiber clamp holder, a gland and a lifting mechanism; the optical fiber holder is fixed on the clamp base and used for holding a polarization maintaining optical fiber, the gland is mounted on the clamp base in an up-and-down moving mode, the gland and the clamp base are used for holding the ferrule base in an up-and-down moving mode, and the lifting mechanism drives the gland to move up and down;

the transverse clamping mechanism is provided with a clamping part, and the clamping part is used for transversely clamping the ferrule base so that the ferrule base is opposite to the polarization maintaining optical fiber in the longitudinal direction;

and the observation equipment is arranged on the adjusting frame, and the adjusting frame can respectively adjust the position of the observation equipment on XYZ axes so that the observation equipment is opposite to the end face of the ferrule.

2. The polarization maintaining optical fiber assembling apparatus of claim 1, wherein said turnover jig further comprises a lifting rod, said lifting rod is disposed in a U-shape, and is mounted on said jig base in a vertical direction to be located at the periphery of the polarization maintaining optical fiber, said pressing cover is connected to the top of said lifting rod, and said lifting mechanism drives said lifting rod to move up and down.

3. The polarization maintaining optical fiber assembling apparatus of claim 2, wherein the turnover fixture further comprises a baffle, the fixture base is provided with a mounting groove with an upward notch, the baffle is mounted on the notch of the mounting groove, the lifting rod can be mounted in the mounting groove along the upward and downward movement, two ends of the lifting rod are respectively located at two sides of the baffle, the bottom of the baffle and the bottom of the lifting rod are connected with a return spring, and the baffle abuts against the ferrule base.

4. The polarization maintaining optical fiber assembling device according to claim 3, further comprising an assembling base, wherein the transverse clamping mechanism is fixed on the assembling base, the assembling base is provided with a mounting hole extending along the vertical direction, the mounting hole penetrates through the upper surface of the assembling base, a through hole is formed in the bottom of the assembling base, the through hole penetrates through the side wall of the assembling base and is communicated with the lower end of the mounting hole, the clamp base is detachably mounted on the assembling base, a through hole is formed in the bottom of the mounting hole, and the through hole is opposite to the mounting hole;

the lifting mechanism comprises a second driving mechanism, a jacking rod and a balance plate, the balance plate can be vertically rotated and installed in the through hole, the jacking rod is located in the installation hole, the lower surface of the jacking rod is abutted to one end of the balance plate, the other end of the balance plate is located outside the assembling base, the second driving mechanism drives the other end of the balance plate to rotate downwards, so that the balance plate pushes the jacking rod to move upwards, and the lifting rod is pushed to move upwards to the position above the baffle.

5. The polarization maintaining optical fiber assembling apparatus of claim 4, wherein said second driving mechanism is a micrometer.

6. The polarization maintaining optical fiber assembling apparatus of claim 1, wherein a holding groove extending in a longitudinal direction and used for holding the polarization maintaining optical fiber is formed at a top of the optical fiber holder, a flip cover is hinged on the optical fiber holder and can be turned over to be opposite to the holding groove, a first magnetic attraction portion is formed on the optical fiber holder, and a second magnetic attraction portion magnetically engaged with the first magnetic attraction portion is formed on the flip cover.

7. The polarization maintaining fiber assembling apparatus of claim 6, wherein said flip cover has a silicone rubber facing said holding groove, and said fiber holder has a holding groove facing said silicone rubber at a top portion thereof.

8. The polarization maintaining optical fiber assembling device according to claim 1, further comprising an assembling base, wherein the clamping portion comprises two clamping pieces which are oppositely arranged in the transverse direction, the clamping pieces are movably mounted on the assembling base, and the transverse clamping mechanism further comprises a first driving mechanism which drives the two clamping pieces to move oppositely or back to back.

9. The polarization maintaining optical fiber assembling apparatus of claim 8, wherein said first driving mechanism is a finger cylinder, and two of said jaws are fixedly connected to two chucks of the finger cylinder, respectively.

10. A method of using a polarization maintaining optical fiber installation apparatus, based on the polarization maintaining optical fiber installation apparatus of any one of claims 1 to 9, comprising the steps of:

s1, stripping a coating on the polarization maintaining optical fiber, placing the polarization maintaining optical fiber on an optical fiber holder, inserting the ferrule into the ferrule base, placing the ferrule base on the clamp base, and clamping the ferrule base by using a transverse clamping mechanism so that the ferrule base and the polarization maintaining optical fiber are opposite in the longitudinal direction and the polarization maintaining optical fiber is inserted into the ferrule;

s2, driving the gland to move downwards by using the first driving mechanism, and enabling the gland and the clamp base to clamp the ferrule base in the vertical direction, so that the ferrule base is fixed;

s3, the end face of the ferrule can be clearly seen by the observation equipment through adjusting the adjusting frame;

s4, detecting the panda eye of the polarization maintaining optical fiber on the observation equipment, and rotating the inserting core to enable the panda eye of the polarization maintaining optical fiber to be at a proper position so as to carry out dispensing curing operation.

Background

Polarization maintaining fiber is an important basic equipment for constituting coherent optical communication and coherent optical fiber sensing system. By artificially manufacturing double refraction in the optical fiber, the propagation constants of two linear polarization fundamental modes in the polarization-maintaining optical fiber are greatly different, so that the random unstable mode-to-mode coupling in the propagation process is effectively inhibited, and the transmission requirements of the polarization-maintaining performance and high-precision signals are met. Theoretically, the sensitivity of the coherent detection method can be improved by about 20dB compared with the sensitivity of direct amplitude detection, so that the coherent optical fiber sensor mainly using the polarization maintaining optical fiber becomes a hot spot of the current optical fiber sensor research.

The detection and alignment of the polarization axis orientation is a key technology for the application of the polarization-maintaining optical fiber coherence field and the manufacture of related devices. The crosstalk can be effectively controlled to be 30dB by the axis-to-axis error smaller than 2 degrees, and the precision requirement of most application occasions can be met. Aiming at the problems of polarization axis detection and positioning, various methods are provided by many scholars and mechanisms according to the physical characteristics and stress structure characteristics of polarization-maintaining optical fibers, the traditional extinction ratio method detection technology, the central image local monitoring technology provided by the rattan storehouse company, the side axis detection technology and the like can well solve the problems, but the technologies have certain limitations, and mainly have the problems of narrow application range, poor optical fiber identification capability or complex device and the like, and the practical cost is higher.

The current microscopic visual inspection method is only suitable for common polarization-maintaining optical fibers with larger difference between the refractive index of the stress region and the refractive index of the cladding, so that the polarization axis can be observed more easily. For some special devices, such as polarization maintaining couplers, in order to improve the performance of the devices, matching type polarization maintaining fibers with small difference between the refractive index of the stress region and the refractive index of the cladding, and photonic crystal polarization maintaining fibers with side surface light irradiation and difficult imaging are needed. For such polarization-maintaining optical fibers, imaging characteristics are not obvious, polarization axis detection is difficult to perform directly through side-polished imaging observation, and the working efficiency and the application range are limited because matching fluid is sometimes used in the axis aligning process.

Disclosure of Invention

In view of the above, embodiments of the present invention provide a polarization maintaining fiber assembling apparatus and a method for using the same.

An embodiment of the present invention provides a polarization maintaining optical fiber assembly apparatus, including:

the turnover clamp comprises a clamp base, an optical fiber clamp holder, a gland and a lifting mechanism; the optical fiber holder is fixed on the clamp base and used for holding a polarization maintaining optical fiber, the gland is mounted on the clamp base in an up-and-down moving mode, the gland and the clamp base are used for holding the ferrule base in an up-and-down moving mode, and the lifting mechanism drives the gland to move up and down;

the transverse clamping mechanism is provided with a clamping part, and the clamping part is used for transversely clamping the ferrule base so that the ferrule base is opposite to the polarization maintaining optical fiber in the longitudinal direction;

and the observation equipment is arranged on the adjusting frame, and the adjusting frame can respectively adjust the position of the observation equipment on XYZ axes so that the observation equipment is opposite to the end face of the ferrule.

Further, the turnover fixture further comprises a lifting rod, the lifting rod is arranged in a U shape, is movably installed on the fixture base in the vertical direction and is located on the periphery of the polarization maintaining optical fiber, the gland is connected with the top of the lifting rod, and the lifting mechanism drives the lifting rod to move up and down.

Further, the turnover fixture further comprises a baffle, an installation groove with an upward notch is formed in the fixture base, the baffle is installed in the notch of the installation groove, the lifting rod can be installed in the installation groove in an up-and-down moving mode, two ends of the lifting rod are located on two sides of the baffle respectively, the bottom of the baffle is connected with a reset spring, and the baffle abuts against the insertion core base.

The fixture comprises a fixture base, a transverse clamping mechanism and a clamp base, wherein the transverse clamping mechanism is fixed on the fixture base, the fixture base is provided with a mounting hole extending in the vertical direction, the mounting hole penetrates through the upper surface of the fixture base, the bottom of the fixture base is provided with a through hole, the through hole penetrates through the side wall of the fixture base and is communicated with the lower end of the mounting hole, the clamp base is detachably mounted on the fixture base, the bottom of the mounting hole is provided with a through hole in a penetrating manner, and the through hole and the mounting hole are oppositely arranged;

the lifting mechanism comprises a second driving mechanism, a jacking rod and a balance plate, the balance plate can be vertically rotated and installed in the through hole, the jacking rod is located in the installation hole, the lower surface of the jacking rod is abutted to one end of the balance plate, the other end of the balance plate is located outside the assembling base, the second driving mechanism drives the other end of the balance plate to rotate downwards, so that the balance plate pushes the jacking rod to move upwards, and the lifting rod is pushed to move upwards to the position above the baffle.

Further, the second driving mechanism is a micrometer.

Furthermore, the top of the optical fiber holder is provided with a clamping groove which extends along the longitudinal direction and is used for clamping the polarization maintaining optical fiber, the optical fiber holder is hinged with a flip cover, the flip cover can be turned to be opposite to the clamping groove, the optical fiber holder is provided with a first magnetic suction part, and the flip cover is provided with a second magnetic suction part matched with the first magnetic suction part in a magnetic suction manner.

Furthermore, flip towards one side of centre gripping groove is equipped with the silica gel relative with the polarization maintaining optical fiber, the fiber holder top is equipped with the holding tank relative with silica gel.

Further, still including the assembly base, the clamping part includes two clamping pieces that set up relatively on horizontal, clamping piece movable mounting in on the assembly base, horizontal fixture still includes a actuating mechanism, a actuating mechanism drives two the clamping piece is relative or move dorsad.

Furthermore, the first driving mechanism is a finger cylinder, and the two clamping pieces are fixedly connected with the two clamping heads of the finger cylinder respectively.

The embodiment of the invention also provides a use method of the polarization maintaining optical fiber assembling device, which comprises the following steps:

s1, stripping a coating on the polarization maintaining optical fiber, placing the polarization maintaining optical fiber on an optical fiber holder, inserting the ferrule into the ferrule base, placing the ferrule base on the clamp base, and clamping the ferrule base by using a transverse clamping mechanism so that the ferrule base and the polarization maintaining optical fiber are opposite in the longitudinal direction and the polarization maintaining optical fiber is inserted into the ferrule;

s2, driving the gland to move downwards by using the first driving mechanism, and enabling the gland and the clamp base to clamp the ferrule base in the vertical direction, so that the ferrule base is fixed;

s3, the end face of the ferrule can be clearly seen by the observation equipment through adjusting the adjusting frame;

s4, detecting the panda eye of the polarization maintaining optical fiber on the observation equipment, and rotating the inserting core to enable the panda eye of the polarization maintaining optical fiber to be at a proper position so as to carry out dispensing curing operation.

The technical scheme provided by the embodiment of the invention has the following beneficial effects: the polarization maintaining optical fiber is placed on the optical fiber holder, the insertion core is inserted into the insertion core base, the insertion core base is placed on the fixture base, the horizontal clamping mechanism is utilized to clamp the insertion core base, the insertion core base is opposite to the polarization maintaining optical fiber in the longitudinal direction, the first driving mechanism is utilized to drive the pressing cover to move up and down, the pressing cover and the fixture base are enabled to vertically clamp the insertion core base, and therefore the insertion core base is fixed, the end stress areas of the polarization maintaining optical fibers of different types can be precisely aligned, and later-stage butt joint or fusion joint is facilitated. The polarization maintaining optical fiber assembling device is utilized, the assembling efficiency of the polarization maintaining optical fiber can be improved, the assembling process is simple and easy to control, the time cost of optical fiber assembling is reduced, the device is simple in structure, low in cost and easy to realize, and the device is good in operability and convenient for batch production.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of a polarization maintaining optical fiber assembling apparatus provided by the present invention;

FIG. 2 is a schematic diagram of the configuration of the stabilization platform, the scope and the assembly fixture of FIG. 1;

FIG. 3 is a schematic view of the assembly jig and epicyclic jig of FIG. 1;

FIG. 4 is an exploded view of the turnaround fixture of FIG. 1;

fig. 5 is an exploded view of the assembly fixture of fig. 1.

In the figure: the device comprises a polarization maintaining optical fiber 100, a ferrule base 200, a ferrule 300, a stable platform 1, an observation device 2, an adjusting frame 3, an assembling base 4, a mounting hole 4a, a through hole 4b, a through hole, a transverse clamping mechanism 5, a clamping piece 5a, a first driving mechanism 5b, a clamp base 6, a mounting groove 6a, an optical fiber clamp 7, a clamping groove 7a, a holding groove 7b, a gland 8, a lifting mechanism 9, a second driving mechanism 9a, a jacking rod 9b, a balance plate 9c, a flip cover 10, silica gel 10a, a lifting rod 11, a limiting groove 11a, a baffle plate 12, a reset spring 13 and a support 14.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 to 5, an embodiment of the present invention provides a polarization maintaining optical fiber assembling apparatus, which includes a stable platform 1, an assembling jig, a turnover jig, and an observation device 2. The assembly fixture is arranged on the stable platform 1, the observation device 2 is arranged on the adjusting frame 3, and the adjusting frame 3 can respectively adjust the position of the observation device 2 on XYZ axes so that the observation device 2 is opposite to the end face of the ferrule 300. The observation device 2 includes a high power CCD, which may be a one thousand power magnifying microscope, etc., and the adjusting frame 3 is a prior art and will not be described in detail herein.

Referring to fig. 3 and 4, the epicyclic clamp comprises a clamp base 6, a fiber holder 7, a gland 8 and a lifting mechanism 9. The clamp base 6 is detachably mounted on the assembly base 4, the optical fiber holder 7 is fixed on the clamp base 6 and used for holding the polarization maintaining optical fiber 100, specifically, a clamping groove 7a which extends along the longitudinal direction and is used for holding the polarization maintaining optical fiber 100 is formed in the top of the optical fiber holder 7, a flip cover 10 is hinged on the optical fiber holder 7 and can be turned over to be opposite to the clamping groove 7a (see fig. 1), a first magnetic suction part is arranged on the optical fiber holder 7, a second magnetic suction part matched with the first magnetic suction part is arranged on the flip cover 10 and can fix the polarization maintaining optical fiber 100 in the clamping groove 7a, the clamping groove 7a is located in the center of the optical fiber holder 7, and the ferrule base 200 is fixed by a finger cylinder to be opposite to the center of the optical fiber holder 7. Flip 10 towards one side of centre gripping groove 7a is equipped with the silica gel 10a relative with polarization maintaining optical fiber 100, optical fiber holder 7 top is equipped with the holding tank 7b relative with silica gel 10a, and flip 10 overturns to spacing groove 11a on the back, and silica gel 10a is located holding tank 7b, presses on polarization maintaining optical fiber 100, can avoid polarization maintaining optical fiber 100 to rotate, avoids simultaneously pressing polarization maintaining optical fiber 100 bad. The gland 8 moves up and down and is installed on the clamp base 6, the gland 8 and the clamp base 6 are used for clamping the ferrule base 200 up and down, and the lifting mechanism 9 drives the gland 8 to move up and down.

Referring to fig. 2 and 5, the assembling jig includes an assembling base 4 and a transverse clamping mechanism 5, the transverse clamping mechanism 5 is fixed on the assembling base 4, and the transverse clamping mechanism 5 has a clamping portion for clamping the ferrule base 200 transversely so that the ferrule base 200 is opposite to the polarization maintaining fiber 100 in the longitudinal direction. In this embodiment, the clamping part includes two clamping pieces 5a that set up relatively in horizontal, clamping piece 5a movable mounting in on the assembly base 4, horizontal fixture 5 still includes a drive mechanism 5b, a drive mechanism 5b drives two clamping pieces 5a move relatively or dorsad. The first driving mechanism 5b can be two one-way cylinders, and the like, and is a finger cylinder in the embodiment, the two clamping pieces 5a are respectively fixedly connected with two clamping heads of the finger cylinder, and the finger cylinder can ensure that the two clamping pieces 5a keep the same speed to move in opposite directions or in back direction, so that the insertion core base 200 is ensured to be fixed at the center of the finger cylinder. In this embodiment, the position of the polarization maintaining fiber 100 is located above the first driving mechanism 5b, and the clamping pieces 5a are arranged in a step shape.

The coating on the polarization maintaining optical fiber 100 is stripped, the polarization maintaining optical fiber 100 is placed on the optical fiber holder 7, the insertion core 300 is inserted into the insertion core base 200, the insertion core base 200 is placed on the clamp base 6, the insertion core base 200 is held by the transverse clamping mechanism 5, the insertion core base 200 is opposite to the polarization maintaining optical fiber 100 in the longitudinal direction, the first driving mechanism 5b is used for driving the pressing cover 8 to move up and down, the pressing cover 8 and the clamp base 6 are used for clamping the insertion core base 200 in the vertical direction, therefore, the insertion core base 200 is fixed, the end stress regions of the polarization maintaining optical fibers 100 of different types can be precisely aligned, and later-stage butt joint or fusion joint is facilitated. By utilizing the polarization maintaining optical fiber 100 assembling device, the assembling efficiency of the polarization maintaining optical fiber 100 can be improved, the assembling process is simple and easy to control, the time cost of optical fiber assembling is reduced, the device has a simple structure, low cost and easy realization, and the device has good operability and is convenient for batch production.

Further, turnover anchor clamps still include lifter 11 and baffle 12, lifter 11 is the U-shaped setting, along from top to bottom to remove install in on the anchor clamps base 6, be located polarization maintaining optical fiber 100 periphery, gland 8 with the 11 top of lifter is connected, the drive of elevating system 9 the lifter 11 reciprocates, can ensure gland 8 and exert perpendicular decurrent pressure to polarization maintaining optical fiber 100, avoids causing the damage to polarization maintaining optical fiber 100.

Specifically, an installation groove 6a with an upward notch is formed in the fixture base 6, the baffle 12 is installed in the notch of the installation groove 6a, the lifting rod 11 can be installed in the installation groove 6a in an up-and-down moving manner, two ends of the lifting rod 11 are respectively located on two sides of the baffle 12, the bottom of the baffle 12 and the bottom of the lifting rod 11 are connected with a return spring 13, and the baffle 12 abuts against the ferrule base 200. The installation of polarization maintaining optical fiber 100 is convenient for, gland 8 with the detachable connection in lifter 11 top specifically is the buckle connection. In this embodiment, the inner side walls of the two ends of the lifting rod 11 are respectively provided with a limiting groove 11a extending along the longitudinal direction, and the two ends of the gland 8 are buckled in the limiting grooves 11 a. A return spring 13 is connected between the baffle 12 and the lifting rod 11, and when an upward pushing force is not applied to the lifting rod 11, the lifting rod 11 can move downward under the pushing force of the return spring 13, so that the gland 8 applies a downward pressure to the polarization maintaining optical fiber 100.

The assembly base 4 is equipped with along the mounting hole 4a of upper and lower directional extension, mounting hole 4a runs through assembly base 4 upper surface, assembly base 4 bottom has been seted up and has been perforated 4b, it runs through to perforate 4b assembly base 4 lateral wall, and with mounting hole 4a lower extreme intercommunication, the mounting groove 6a bottom is run through and is equipped with the through-hole, the through-hole with mounting hole 4a sets up relatively.

Elevating system 9 includes second actuating mechanism 9a, lifting rod 9b and balance plate 9c, but balance plate 9c tilting mount in perforation 4b (rotate through the round pin axle and connect), balance plate 9c is located the one end of perforation 4b and extends to mounting hole 4a, lifting rod 9b is located in mounting hole 4a, the lower surface with balance plate 9c one end offsets, the balance plate 9c other end is located the assembly base 4 outside, the drive of second actuating mechanism 9a balance plate 9c other end is rotated downwards, so that balance plate 9c promotes lifting rod 9b rebound to pass the through-hole promotion lifting rod 11 rebound extremely baffle 12 top. Specifically, the second driving mechanism 9a is a micrometer, which can improve the precision of the up-and-down movement distance of the gland 8, and the micrometer is fixedly installed on the assembly base 4 through the bracket 14.

Based on the polarization maintaining optical fiber assembling device, the embodiment of the invention also provides a using method of the polarization maintaining optical fiber assembling device, which comprises the following steps:

s1, stripping off a coating on the polarization maintaining optical fiber 100, placing the polarization maintaining optical fiber 100 on the optical fiber holder 7, inserting the ferrule 300 into the ferrule base 200, placing the ferrule base 200 on the clamp base 6, and clamping the ferrule base 200 by using the transverse clamping mechanism 5 so that the ferrule base 200 is opposite to the polarization maintaining optical fiber 100 in the longitudinal direction and the polarization maintaining optical fiber 100 is inserted into the ferrule 300;

specifically, the turnover fixture is placed in the assembly base 4, the polarization maintaining fiber 100 is placed in the clamping groove 7a of the fiber holder 7, and the finger cylinder is slid, so that the two chucks of the finger cylinder drive the two clamping pieces 5a to move towards the center at the same time, and the ferrule 300 is ensured to be at the center of the fiber holder 7.

S2, the first driving mechanism 5b drives the gland 8 to move downwards, so that the gland 8 and the clamp base 6 clamp the ferrule base 200 in the vertical direction, thereby fixing the ferrule base 200;

specifically, the micrometer on the assembly base 4 is screwed, according to the lever principle, the micrometer pushes the balance plate 9c downwards to descend at the end outside the assembly base 4, the balance plate 9c is positioned at the end inside the through hole 4b to ascend, so as to push the jacking rod 9b to ascend, and the jacking rod 9b penetrates through the through hole to push the lifting rod 11 to move upwards when ascending, so that the reset spring 13 between the lifting rod 11 and the baffle 12 is compressed. After the lifting rod 11 rises to a certain position, the gland 8 is arranged on the lifting rod 11, so that the ferrule base 200 is positioned below the gland 8, a micrometer on the assembly base 4 is adjusted, the lifting rod 9b is lowered to rebound the spring force, the gland 8 moves downwards to abut against the ferrule base 200, and the ferrule base 200 is fixed;

s3, the end face of the ferrule 300 can be clearly seen by the observation equipment 2 through adjusting the adjusting frame 3;

s4, detecting the panda eye of the polarization maintaining fiber 100 on the observation device 2, and rotating the ferrule 300 to make the panda eye of the polarization maintaining fiber 100 in a proper position for performing the dispensing and curing operation.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

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, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.