WO2021092953A1 - Tête de sortie de fibre optique - Google Patents

Tête de sortie de fibre optique Download PDF

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Publication number
WO2021092953A1
WO2021092953A1 PCT/CN2019/118988 CN2019118988W WO2021092953A1 WO 2021092953 A1 WO2021092953 A1 WO 2021092953A1 CN 2019118988 W CN2019118988 W CN 2019118988W WO 2021092953 A1 WO2021092953 A1 WO 2021092953A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical fiber
sleeve
lens barrel
liquid
lens
Prior art date
Application number
PCT/CN2019/118988
Other languages
English (en)
Chinese (zh)
Inventor
马修泉
张振海
Original Assignee
广东省智能机器人研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 广东省智能机器人研究院 filed Critical 广东省智能机器人研究院
Priority to PCT/CN2019/118988 priority Critical patent/WO2021092953A1/fr
Publication of WO2021092953A1 publication Critical patent/WO2021092953A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/02—Constructional details
    • H01S3/04—Arrangements for thermal management
    • H01S3/042—Arrangements for thermal management for solid state lasers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers

Definitions

  • the invention relates to optical fiber laser output technology, in particular to an optical fiber output head.
  • the fiber output head of the existing fiber laser mainly has QBH, QD and other standards. After the output fiber is fixed to the output heads such as QBH, QD, etc., when the laser is emitted from QBH or QD, it has a divergence angle. It is necessary to install a collimating unit at the rear end of the output head before it can be used for laser cutting or laser welding; The straight unit and the output head are disconnected and connected. Therefore, dust can easily enter the space between the fiber output head and the collimating unit, which may cause laser reflection, damage the output head or laser generating device, or cause the effective output laser power to drop .
  • an optical fiber output head is provided.
  • An optical fiber output head comprising: a lens barrel, an optical fiber sleeve housed in the lens barrel, an optical fiber cooling assembly connected to the lens barrel, and a collimating assembly installed in the lens barrel;
  • the optical fiber cooling assembly includes A liquid-cooled sleeve sleeved on the outside of the optical fiber sleeve; the liquid-cooled sleeve confines the optical fiber sleeve in the lens barrel;
  • the collimating assembly includes a collimating lens arranged in the lens barrel ; The collimating lens is arranged corresponding to the light exit of the optical fiber sleeve.
  • the beneficial effects of the optical fiber output head of the present invention after the output fiber is inserted into the fiber sleeve, the liquid-cooled sleeve and the fiber sleeve confine the output fiber in the lens barrel, and the output end of the output fiber is aligned with the collimator. Corresponding to the lens. After the laser beam with divergence angle output by the output fiber is collimated by the collimating lens, the parallel laser beam is emitted from the light exit side of the lens barrel, so as to avoid external collimation devices and avoid connecting external collimation devices. Laser reflection or output power drop due to dust.
  • Fig. 1 is a three-dimensional schematic diagram of an optical fiber output head according to an embodiment
  • Figure 2 is a front view of the optical fiber output head shown in Figure 1;
  • Fig. 3 is a side view of the optical fiber output head shown in Fig. 2 in the AA direction;
  • Fig. 4A is an enlarged view of the optical fiber output head shown in Fig. 3 at the circle B;
  • Fig. 4B is an enlarged view of the optical fiber output head shown in Fig. 3 at the circle C;
  • Fig. 5 is an enlarged view of the optical fiber output head shown in Fig. 3 at the circle D;
  • Fig. 6 is an exploded schematic diagram of the optical fiber output head shown in Fig. 1;
  • Fig. 7 is a three-dimensional schematic diagram of the optical fiber ferrule in Fig. 6 after being separated from the liquid cooling sleeve, in which the lens barrel and the collimating cooling component are hidden;
  • Figure 8 is a three-dimensional schematic diagram of the collimating component and the protective component in Figure 6 after being separated from the lens barrel, in which the fiber tube and the fiber cooling component are hidden;
  • FIG. 9 is a three-dimensional schematic diagram of the lens barrel in FIG. 8.
  • Optical fiber output head 100
  • the lens barrel 20 the outer liquid inlet 201, the first outer liquid outlet 202, the first positioning step 211, the collimated cooling channel 212, the direct flow section 213, the circulation section 214, the threaded area 221, the installation part 222, the first installation Hole 223, first screw hole 231, first annular groove 241, second annular groove 242, third annular groove 251, second screw hole 271, tapered inner cavity 281, second positioning step 291, seventh annular groove 292 ;
  • Optical fiber cooling assembly 40 liquid cooling sleeve 41, inner liquid inlet 411, inner liquid outlet 412, fourth annular groove 413, flange portion 414, third mounting hole 415, cylindrical groove 416, fifth annular groove 417 , The sixth annular groove 418, the fiber cooling channel 410, the third sealing ring 42, the fourth sealing ring 43, the fifth sealing ring 44, the sixth sealing ring 45, the sleeve locking ring 46, and the seventh sealing ring 47;
  • Protective component 70 protective lens 71, protective lens locking ring 72, and eighth sealing ring 73;
  • an optical fiber output head 100 is used for fixing optical fibers.
  • the optical fiber output head 100 includes a lens barrel 20, an optical fiber sleeve 30 accommodated in the lens barrel 20, an optical fiber cooling assembly 40 connected to the lens barrel 20, and a collimating assembly 50 installed in the lens barrel 20;
  • the optical fiber cooling assembly 40 includes A liquid-cooled sleeve 41 sleeved on the outside of the optical fiber sleeve 30; the liquid-cooled sleeve 41 confines the optical fiber sleeve 30 in the lens barrel 20;
  • the collimating assembly 50 includes a collimating lens 51 arranged in the lens barrel 20;
  • the straight lens 51 is arranged corresponding to the light exit of the optical fiber sleeve 30.
  • the liquid-cooled sleeve 41 and the optical fiber sleeve 30 confine the output optical fiber 801 in the lens barrel 20, and the light output end of the output optical fiber 801 corresponds to the collimating lens 51, After the laser beam with a divergence angle output by the output fiber 801 is collimated by the collimating lens 51, the parallel laser beam is emitted from the light exit side of the lens barrel 20, thereby avoiding external collimation devices and avoiding access to external collimation devices. Laser reflection or output power drop due to dust.
  • the side of the lens barrel 20 is provided with an outer liquid inlet 201 that penetrates to the inner cavity; the side of the lens barrel 20 is also provided with a first outer liquid outlet 202 that penetrates to the inner cavity; the lens barrel 20
  • the inner side is provided with a first positioning step 211 corresponding to the collimating lens 51; the outer side of the lens barrel 20 is provided with a threaded area 221; the outer side of the lens barrel 20 is also extended with a mounting portion 222.
  • the mounting portion 222 of the lens barrel 20 is provided with a plurality of first mounting holes 223. This facilitates the installation and fixation of the optical fiber output head 100.
  • the lens barrel 20 defines a first screw hole 231 between the threaded area 221 and the mounting portion 222.
  • the outer side of the lens barrel 20 is provided with a first annular groove 241 and a second annular groove 242; the light entrance side of the lens barrel 20 is provided with a third annular groove 251.
  • the fiber optic ferrule 30 includes a fiber-containing portion 31 inserted in the liquid-cooled sleeve 41, and a pole portion 32 connected to the fiber-containing portion 31; the fiber optic ferrule 30 also includes a fiber-receiving portion The connecting barrel 33 between the portion 31 and the receiving column portion 32; the outer side of the connecting barrel 33 is provided with an external thread.
  • the lens barrel 20 is provided with a tapered inner cavity 281 between the accommodating column portion 32 and the collimating lens 51.
  • the outer side of the liquid-cooled sleeve 41 is provided with an inner liquid inlet 411 that penetrates to its inner cavity, and the outer side of the liquid-cooled sleeve 41 is also provided with an inner liquid outlet 412 that penetrates to its inner cavity.
  • the outer liquid inlet 201 and the inner liquid inlet 411 are correspondingly communicated, and the first outer liquid outlet 202 and the inner liquid outlet 412 are correspondingly communicated.
  • a gap is left between the inner wall of the liquid cooling sleeve 41 and the surface of the fiber containing portion 31, and the gap between the inner wall of the liquid cooling sleeve 41 and the surface of the fiber containing portion 31 forms an optical fiber cooling channel 410; specifically ,
  • the output optical fiber 801 is accommodated in the tubular fiber-containing portion 31, the quartz column 802 fused to the output optical fiber 801 is accommodated in the accommodating column portion 32, and the accommodating column portion 32 abuts against the outlet end of the liquid-cooled sleeve 41;
  • the cooling liquid enters the fiber cooling channel 410 through the outer liquid inlet 201 and the inner liquid inlet 411 in sequence, and then flows out of the fiber cooling channel 410 from the inner liquid outlet 412 and the first outer liquid outlet 202; preferably, the cooling liquid In full contact with the surface of the fiber containing portion 31, the inner liquid inlet 411 and the inner liquid outlet 412 are arranged on the opposite sides of the liquid cooling sleeve 41, and the inner liquid inlet
  • the outer side of the liquid cooling sleeve 41 is provided with a fourth annular groove 413; the fourth annular groove 413 is located between the inner liquid inlet 411 and the inner liquid outlet 412; the liquid cooling sleeve 41 extends There is a flange portion 414 corresponding to the light entrance side of the lens barrel 20; the third annular groove 251 corresponds to the flange portion 414; the optical fiber cooling assembly 40 also includes a third sealing ring 42 received in the third annular groove 251, And the fourth sealing ring 43 housed in the fourth annular groove 413; because the third sealing ring 42 and the fourth sealing ring 43 respectively abut between the liquid cooling sleeve 41 and the lens barrel 20, thereby avoiding the cooling liquid along The gap between the liquid cooling sleeve 41 and the lens barrel 20 leaks.
  • the flange portion 414 of the liquid-cooling sleeve 41 is provided with a number of third mounting holes 415; the lens barrel 20 is provided with a second screw hole 271 corresponding to the third mounting hole 415; the screws are sequentially inserted through the third mounting holes Between 415 and the second screw hole 271, when the third mounting hole 415 and the second screw hole 271 overlap, the outer liquid inlet 201 corresponds to the inner liquid inlet 411; thus, the liquid cooling sleeve 41 can be opposed to the lens barrel 20 Fixed.
  • the side of the liquid cooling sleeve 41 corresponding to the column portion 32 is provided with internal threads; the connecting barrel 33 is threadedly connected with the liquid cooling sleeve 41.
  • the optical fiber cooling assembly 40 also includes a fifth sealing ring 44 sleeved on the connecting barrel 33; the fifth sealing ring 44 is located between the liquid cooling sleeve 41 and the receiving column portion 32; thereby preventing the cooling liquid from flowing along the liquid cooling sleeve 41 and The gap between the container column portions 32 causes leakage.
  • the liquid cooling sleeve 41 is provided with a cylindrical groove 416 at one end where the laser enters; the liquid cooling sleeve 41 is provided with a fifth annular groove 417 on the inner side of the cylindrical groove 416; An internal thread is provided on the inner wall corresponding to the cylindrical groove 416; the liquid cooling sleeve 41 also includes a sixth sealing ring 45 housed in the fifth annular groove 417, and a sleeve lock housed in the cylindrical groove 416 The tight ring 46; the optical fiber ferrule 30 passes through the sleeve locking ring 46; the sixth sealing ring 45 abuts between the sleeve locking ring 46 and the liquid-cooled sleeve 41.
  • the fifth annular groove 417 is located close to the edge of the inner cavity of the liquid cooling sleeve 41.
  • the sixth sealing ring 45 blocks the space between the fiber containing portion 31 and the liquid cooling sleeve 41. So as to avoid the leakage of the coolant along the gap between the optical fiber ferrule 30 and the liquid-cooled ferrule 41.
  • the outer side of the liquid cooling sleeve 41 is provided with a sixth annular groove 418; the sixth annular groove 418 is located between the end of the liquid cooling sleeve 41 facing the column portion 32 and the inner liquid outlet 412; the optical fiber cooling assembly 40 also includes a seventh sealing ring 47 accommodated in the sixth annular groove 418.
  • the collimating lens 51 is disposed close to the first positioning step 211; the collimating assembly 50 also includes a collimating locking ring 52 threadedly connected to the inner side of the lens barrel 20; the collimating lens 51 is disposed in the first Position between the step portion 211 and the collimation locking ring 52.
  • the collimating assembly 50 further includes a first spacer 53 disposed between the collimating lens 51 and the first positioning step 211, and a second spacer 54 disposed between the collimating lens 51 and the collimation locking ring 52 .
  • first spacer 53 disposed between the collimating lens 51 and the first positioning step 211
  • second spacer 54 disposed between the collimating lens 51 and the collimation locking ring 52 .
  • the optical fiber output head 100 further includes a collimation cooling assembly 60 connected to the lens barrel 20;
  • the collimation cooling assembly 60 includes an outer sleeve 61 sleeved on the outside of the lens barrel 20;
  • the outer sleeve 61 is provided with a first Two outer liquid outlets 611;
  • a collimating cooling channel 212 is provided between the outer tube 61 and the lens barrel 20, and the collimating cooling channel 212 is located between the threaded area 221 and the mounting portion 222;
  • the collimating cooling channel 212 includes a direct flow section 213, and the circulation section 214;
  • the direct flow section 213 connects the first outer liquid outlet 202 and the beginning end of the circulation section 214;
  • the second outer liquid outlet 611 communicates with the end of the circulation section 214 correspondingly;
  • the cooling liquid flowing out from the inner liquid outlet 412 and the first outer liquid outlet 202 is connected to the circulation section
  • the collimation cooling assembly 60 also includes a liquid-cooled locking ring 62 sleeved on the threaded area 221; the outer tube 61 is provided between the mounting portion 222 and the liquid-cooled locking ring 62; specifically, the liquid-cooled locking ring 62 is connected to the The lens barrel 20 is threadedly connected, thereby confining the outer tube 61 to a position corresponding to the collimating cooling channel 212.
  • An anti-slip pattern 621 is provided on the outer side of the liquid-cooled locking ring 62.
  • the outer sleeve 61 is provided with a second installation hole 612 corresponding to the first screw hole 231; specifically, when the second installation hole 612 overlaps the first screw hole 231, the second outer liquid outlet 611 on the outer sleeve 61 and The ends of the circulation section 214 are correspondingly overlapped, and the fixing members are sequentially inserted into the second mounting hole 612 and the first screw hole 231 to lock the angle and position of the outer tube 61 relative to the lens barrel 20.
  • the collimating cooling channel 212 is located between the first annular groove 241 and the second annular groove 242; the collimating cooling assembly 60 further includes a first sealing ring 63 accommodated in the first annular groove 241, and The second sealing ring 64 in the second annular groove 242 is accommodated; since the first sealing ring 63 and the second sealing ring 64 respectively abut between the lens barrel 20 and the outer tube 61, thereby avoiding the cooling liquid along the outer tube 61 and The gap between the lens barrels 20 leaks out of the outer sleeve 61.
  • the optical fiber output head 100 further includes a protective assembly 70 connected to the lens barrel 20; the protective assembly 70 includes a protective lens 71 installed in the lens barrel 20; in the axial direction of the collimating lens 51, the protective lens 71 is located outside of the collimating lens 51.
  • the inner side of the lens barrel 20 is provided with a second positioning step 291 corresponding to the protective lens 71; the protective assembly 70 further includes a protective lens locking ring 72 threadedly connected to the inner side of the lens barrel 20; the protective lens 71 is at the second positioning step 291 and The protective lens is locked between the locking rings 72; thus, the protective lens 71 is limited in the lens barrel 20.
  • the lens barrel 20 is provided with a seventh annular groove 292 on the second positioning step 291; the seventh annular groove 292 faces the protective lens 71; the protective assembly 70 further includes an eighth sealing ring 73 accommodated in the seventh annular groove 292; The eighth sealing ring 73 fills the gap between the second positioning step 291 and the protective lens 71. This prevents external dust or liquid from entering the lens barrel 20 along the gap between the second positioning step 291 and the protective lens 71.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

Tête de sortie de fibre optique, comprenant : un barillet de lentille (20), un manchon de fibre optique (30) logé dans le barillet de lentille (20), un ensemble de refroidissement de fibre optique (40) relié au barillet de lentille (20), et un ensemble de collimation (50) monté dans le barillet de lentille (20) ; l'ensemble de refroidissement de fibre optique (40) comprenant un manchon de refroidissement de liquide (41) ajusté sur un côté extérieur du manchon de fibre optique (30) ; le manchon de fibre optique (30) est limité dans le barillet de lentille (20) au moyen du manchon de refroidissement de liquide (41) ; l'ensemble de collimation (50) comprend une lentille de collimation (51) disposée dans le barillet de lentille (20) ; la lentille de collimation (51) est disposée de façon à correspondre à un orifice de sortie de lumière du manchon de fibre optique (30). Lorsqu'une fibre optique de sortie (801) pénètre à travers le manchon de fibre optique (30), le manchon de refroidissement de liquide (41) et le manchon de fibre optique (30) limitent la fibre optique de sortie (801) dans le barillet de lentille (20), et une extrémité de sortie de lumière de la fibre optique de sortie (801) correspond à la lentille de collimation (51) ; lorsqu'un faisceau laser a un angle de divergence qui est émis par la fibre optique de sortie (801) est collimaté par la lentille de collimation (51), un faisceau laser parallèle est émis à partir d'un côté de sortie de lumière du barillet de lentille (20), de telle sorte qu'un dispositif de collimation externe peut être omis, et la réflexion laser ou la réduction de puissance de sortie provoquée par la poussière après la connexion du dispositif de collimation externe est évitée.
PCT/CN2019/118988 2019-11-15 2019-11-15 Tête de sortie de fibre optique WO2021092953A1 (fr)

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PCT/CN2019/118988 WO2021092953A1 (fr) 2019-11-15 2019-11-15 Tête de sortie de fibre optique

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Application Number Priority Date Filing Date Title
PCT/CN2019/118988 WO2021092953A1 (fr) 2019-11-15 2019-11-15 Tête de sortie de fibre optique

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204302535U (zh) * 2014-06-04 2015-04-29 上海飞博激光科技有限公司 主动冷却式光纤准直激光输出头
CN105527679A (zh) * 2015-12-29 2016-04-27 孟祥宇 一种光纤激光输出头及其制造方法
US20170071695A1 (en) * 2014-01-10 2017-03-16 Riken Medical laser light source system
CN107332100A (zh) * 2017-08-09 2017-11-07 光惠（上海）激光科技有限公司 一种具有输出光路和出光功率检测功能的水冷式易拆洗激光输出头
CN109994918A (zh) * 2018-01-02 2019-07-09 深圳市创鑫激光股份有限公司 激光输出头及具有该激光输出头的激光器
CN110323658A (zh) * 2018-03-31 2019-10-11 深圳市创鑫激光股份有限公司 激光输出头和激光器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170071695A1 (en) * 2014-01-10 2017-03-16 Riken Medical laser light source system
CN204302535U (zh) * 2014-06-04 2015-04-29 上海飞博激光科技有限公司 主动冷却式光纤准直激光输出头
CN105527679A (zh) * 2015-12-29 2016-04-27 孟祥宇 一种光纤激光输出头及其制造方法
CN107332100A (zh) * 2017-08-09 2017-11-07 光惠（上海）激光科技有限公司 一种具有输出光路和出光功率检测功能的水冷式易拆洗激光输出头
CN109994918A (zh) * 2018-01-02 2019-07-09 深圳市创鑫激光股份有限公司 激光输出头及具有该激光输出头的激光器
CN110323658A (zh) * 2018-03-31 2019-10-11 深圳市创鑫激光股份有限公司 激光输出头和激光器

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