WO2015081758A1 - Tête de fibre optique de forte puissance, collimateur, isolateur et combineur de fréquence - Google Patents

Tête de fibre optique de forte puissance, collimateur, isolateur et combineur de fréquence Download PDF

Info

Publication number
WO2015081758A1
WO2015081758A1 PCT/CN2014/088938 CN2014088938W WO2015081758A1 WO 2015081758 A1 WO2015081758 A1 WO 2015081758A1 CN 2014088938 W CN2014088938 W CN 2014088938W WO 2015081758 A1 WO2015081758 A1 WO 2015081758A1
Authority
WO
WIPO (PCT)
Prior art keywords
fiber
power
collimator
matching liquid
light
Prior art date
Application number
PCT/CN2014/088938
Other languages
English (en)
Chinese (zh)
Inventor
方强
方笑尘
Original Assignee
方强
方笑尘
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 方强, 方笑尘 filed Critical 方强
Publication of WO2015081758A1 publication Critical patent/WO2015081758A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
    • G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4207—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback
    • G02B6/4208—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback using non-reciprocal elements or birefringent plates, i.e. quasi-isolators
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4212—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element being a coupling medium interposed therebetween, e.g. epoxy resin, refractive index matching material, index grease, matching liquid or gel
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4249—Packages, e.g. shape, construction, internal or external details comprising arrays of active devices and fibres

Definitions

  • the invention relates to a fiber optic passive device, in particular to a group of high power fiber passive components, including a high power fiber head, a high power fiber collimator, a high power fiber isolator and a high power frequency domain combiner, which can be widely applied.
  • High-power optical passive devices are functionally identical to low-power devices except for the high optical power they carry.
  • High-power optical passive components mainly include high-power fiber optic heads, high-power fiber collimators, high-power fiber optic isolators, and high-power fiber-frequency frequency domain combiners.
  • a high-power fiber-optic head is a fiber-optic output head that can withstand high power.
  • a high power fiber collimator is a device that converts light transmitted in an optical fiber into parallel light transmitted in free space.
  • High-power isolators are devices that only allow high-power light transmitted in the fiber to travel in one direction.
  • a high-power frequency domain combiner is a device that combines high-power light of different wavelengths into one fiber.
  • the threshold power intensity of the fiber is very high, the threshold power intensity at the fiber end face and the air interface is much lower, so in the high power fiber passive device, the end face of the fiber is most susceptible to damage.
  • the coating technology of fiber end faces is increasingly difficult to meet the power density requirements of devices, so In the sense, the core of high-power passive device technology is to solve the problem of fiber end face damage.
  • a fiber-free or large-core fiber is usually welded on the end face of the fiber, and the power density on the end face of the fiber is reduced by expanding the beam.
  • This coreless or large-core fiber is called For the fiber end cap.
  • the fiber end face can be subjected to large optical power after being processed by the fiber end cap, and the collimator, the isolator and the frequency domain combiner manufactured by the fiber end cap processed by the fiber end cap can work in a certain power range.
  • professional equipment is required for manufacturing, and manufacturing is difficult.
  • the optical power increases, the temperature at the end of the fiber will increase greatly, and the damage of the fiber end face cannot be fundamentally solved, which may result in damage of the corresponding fiber end face, collimator, isolator and frequency domain combiner.
  • the object of the present invention is to provide an optical fiber end face processing solution capable of solving high power damage of an optical fiber end face, and a high power optical fiber head, a high power optical fiber collimator, a high power optical fiber isolator, and a high power optical fiber frequency domain based on the solution.
  • the combiner at the same time, reduces the manufacturing cost of these devices.
  • the high-power fiber head is composed of N (N is greater than or equal to 1) fiber, glass plate, casing, matching liquid and matching liquid circulation device, wherein: N fiber ends are optically bonded in parallel and pass through the shell
  • the hole seal on the body is disposed on the casing, the N fiber end faces are ground into a plane, and the plane normal is at an angle with the fiber axis;
  • the glass plate is sealed and fixed on the casing and disposed at a region intersecting the optical axis of the fiber a matching liquid is disposed in an area between the end of the optical fiber in the casing and the glass plate;
  • the matching liquid circulation device is internally provided with matching liquid, which is located outside the casing, and passes through the hole and the shell disposed on the casing near the matching liquid setting area The matching solution inside the body is circulated.
  • the high-power fiber collimator is composed of N (N is greater than or equal to 1) fibers, a glass plate, a casing, a matching liquid, a matching liquid circulation device, and a lens, wherein: the optical ends of the N fibers are bonded in parallel, And the hole is sealed on the casing through the hole in the casing, the end faces of the N fibers are ground into a plane, and the plane normal is at an angle with the axis of the fiber; the glass plate is dense
  • the sealing member is fixed on a hole disposed at a region of the housing intersecting the optical axis of the optical fiber;
  • the matching liquid is disposed in an area between the end of the optical fiber in the housing and the glass plate;
  • the matching liquid circulating device is internally provided with matching liquid, and is located outside the housing It circulates through the hole on the casing close to the matching liquid setting area and the matching liquid inside the casing; the lens is disposed outside the casing near the glass plate, and the light emitted by each optical fiber through the matching
  • the high-power fiber collimator is composed of N (N is greater than or equal to 1) fiber, lens, housing, matching liquid and matching liquid circulation device, wherein: N fiber ends are optically bonded in parallel and pass through
  • the hole seal on the casing is disposed on the casing, the N fiber end faces are ground to a plane, and the plane normal is at an angle with the fiber axis;
  • the lens seal is fixed on the casing and is disposed at a region intersecting the optical fiber axis a matching liquid is disposed in an area between the end of the fiber in the housing and the lens;
  • the matching liquid circulation device is internally provided with a matching liquid, which is located outside the housing, and passes through the hole and the casing disposed on the housing near the matching liquid setting area
  • the internal matching solution is circulated; the light output from each of the fibers is output to the free space in the form of parallel light through the matching liquid and the lens, or the parallel light from the free space is coupled to the corresponding fiber by the lens through the matching liquid.
  • the high-power fiber isolator consists of an input high-power collimator, a separator and an output high-power collimator, wherein the isolator is located between the high-power input collimator and the high-power output collimator, and the input is large. Light from the power collimator fiber passes through the isolator and is coupled to the fiber that outputs the high power collimator.
  • a high-power fiber-frequency frequency domain combiner consisting of N (N greater than or equal to 2) input single-tailed fiber collimators, (N-1) filters, and an output single-tailed fiber collimator, wherein: N The input single-tailed high-power collimator outputs N different wavelengths of collimated light ⁇ 1 , ⁇ 2 , ..., ⁇ N , the first single-tailed fiber high-power collimator and the second single-tail fiber high power
  • the light transmission direction of the collimator is at an angle, and a first filter is arranged at the intersection of the two beams, the filter transmits the light of the wavelength ⁇ 1 , and the light of ⁇ 2 is reflected and synthesized into a light beam ( ⁇ ) 1 + ⁇ 2 ), continuing to travel in the direction of ⁇ 1 ; a second filter is placed at the intersection of the beam and the light ⁇ 3 emitted by the third single pigtail collimator, the filter making the beam ( ⁇ 1 + ⁇ 2 ) transmission, reflecting
  • the high-power fiber-frequency frequency domain combiner consists of N (N greater than or equal to 2) pigtail fiber input high-power collimator, diffraction grating and single-tail fiber output high-power collimator, wherein: N-tail fiber input high-power collimation N different wavelengths of parallel light emitted by the device are irradiated on the diffraction grating, and are diffracted by the diffraction grating to form a bundle of parallel light, which is coupled into a single pigtail output high-power collimator.
  • the high-power fiber frequency domain combiner consists of a double-tailed high-power collimator, a filter and a single-tailed high-power collimator, among which: a double-tailed high-power collimator, a filter and a single-tail fiber high-power
  • the collimator is arranged in sequence; one fiber in the double-tailed high-power collimator is the incident fiber, and the other fiber is the outgoing fiber, and the parallel light of a certain wavelength emitted by the incident fiber is irradiated onto the filter, and is reflected.
  • the high-power fiber isolator consists of an input high-power collimator, a separator and an output high-power collimator, wherein the isolator is located between the high-power input collimator and the high-power output collimator, and the input is large. Light from the power collimator fiber passes through the isolator and is coupled to the fiber that outputs the high power collimator.
  • a high-power fiber-frequency frequency domain combiner consisting of N (N greater than or equal to 2) input single-tailed fiber collimators, (N-1) filters, and an output single-tailed fiber collimator, wherein: N The input single-tailed high-power collimator outputs N different wavelengths of collimated light ⁇ 1 , ⁇ 2 , ..., ⁇ N , the first single-tailed fiber high-power collimator and the second single-tail fiber high power
  • the light transmission direction of the collimator is at an angle, and a first filter is arranged at the intersection of the two beams, the filter transmits the light of the wavelength ⁇ 1 , and the light of ⁇ 2 is reflected and synthesized into a light beam ( ⁇ ) 1 + ⁇ 2 ), continuing to travel in the direction of ⁇ 1 ; a second filter is placed at the intersection of the beam and the light ⁇ 3 from the third single-fiber collimator, the filter making the beam ( ⁇ 1 + ⁇ 2 ) transmission, reflecting ⁇ 3
  • the high-power fiber-frequency frequency domain combiner consists of N (N greater than or equal to 2) pigtail fiber input high-power collimator, diffraction grating and single-tail fiber output high-power collimator, wherein: N-tail fiber input high-power collimation N different wavelengths of parallel light emitted by the device are irradiated on the diffraction grating, and the diffraction grating is diffracted and combined into a bundle of parallel light, which is coupled to a single pigtail output high-power collimator. .
  • the high-power fiber frequency domain combiner consists of a double-tailed high-power collimator, a filter and a single-tailed high-power collimator, among which: a double-tailed high-power collimator, a filter and a single-tail fiber high-power
  • the collimator is arranged in sequence; one fiber in the double-tailed high-power collimator is the incident fiber, and the other fiber is the outgoing fiber, and the parallel light of a certain wavelength emitted by the incident fiber is irradiated onto the filter, and is reflected.
  • the effect of the invention is that it can provide high power fiber heads with high power, reliable operation and low cost, high power fiber collimators, high power fiber isolators and high power fiber frequency domain combiners.
  • FIG. 1 is a schematic structural view of a high power optical fiber head according to the present invention.
  • FIG. 2 is a schematic structural view of a first high power fiber collimator according to the present invention.
  • FIG. 3 is a schematic structural diagram of a second high power fiber collimator according to the present invention.
  • FIG. 4 is a schematic structural view of a high power fiber isolator according to the present invention.
  • FIG. 5 is a schematic structural diagram of a first high power fiber frequency domain combiner according to the present invention.
  • 6A and 6B are respectively schematic diagrams showing two structures of a second high-power optical fiber frequency domain combiner according to the present invention.
  • FIG. 7 is a schematic structural diagram of a third high power fiber frequency domain combiner according to the present invention.
  • the core of the invention is to solve the problem of the loss of the end face of the fiber by the flow matching solution, and solve the heat problem caused by the end face loss light, thereby fundamentally eliminating the physical incentive of the fiber end face damage under high power, and stabilizing the high power fiber device. Reliable work is possible.
  • the principles of various high power fiber optic devices proposed by the present invention are described in detail below with reference to the accompanying drawings and embodiments.
  • FIG. 1 is a schematic structural view of a high power optical fiber head according to the present invention. It consists of N (N is greater than or equal to 1) fiber 2, glass plate 3, housing 1, matching liquid 4 and matching liquid circulation device 5, wherein: the optical ends of N fiber ends indicated by 2 are bonded in parallel Together, and fixed to the casing 1 through the hole in the casing, the end faces of the N optical fibers 2 are ground to a plane, and the plane normal is at an angle with the axis of the optical fiber; the glass plate 3 is sealed and fixed to the casing 1 a hole provided at an intersection with the optical axis of the optical fiber; the matching liquid 4 is filled in a region between the end of the optical fiber in the casing and the glass plate; the matching liquid circulation device 5 is internally provided with a matching liquid, which is located outside the casing 1, The hole provided in the casing 1 near the matching liquid setting area is circulated with the matching liquid inside the casing 1.
  • the matching solution reduces the loss caused by the Snell's reflection, and the fiber end face angle allows the Snell's reflection to leak out of the fiber and suppress the echo.
  • the structure greatly reduces the optical power density of the exit surface of the glass sheet, and the flowing matching liquid controls the temperature of the entire device. In combination, the possibility of damage of the high power laser to the film on the exit surface of the glass sheet is greatly reduced, and the The fiber optic head operates in a high power state for a long time.
  • the fiber may be a multi-mode fiber, a single-clad large mode field fiber, a double-clad fiber, or a variety of special fibers.
  • the flow of the matching solution can be achieved by a pump, and in order to control the temperature, the temperature and flow control of the matching liquid can also be performed.
  • High-power fiber optic heads are the basic components in high-power fiber optic passive devices, and we can see concrete examples in the various devices that follow.
  • high power fiber optic heads can be used directly as output terminals for fiber amplifiers, fiber lasers, and semiconductor direct coupled lasers.
  • the multi-tailed high-power fiber head can be used directly as a composite output of multiple lasers. The quality of the combined beam output from this application is much better than that of multiple lasers that traditionally use fiber caps.
  • N is greater than or equal to 1
  • fiber 2 glass plate 3
  • matching liquid 4 matching liquid circulation device 5 and lens 6
  • the N fiber ends of the optical axis indicated by 1 are parallel Bonded together, and sealed through the hole in the casing 1 on the casing 1, the N fiber end faces are ground into a plane, and the plane normal is at an angle with the fiber axis;
  • the glass plate 3 is sealed and fixed at a hole is provided in the housing 1 at a region intersecting the optical axis of the optical fiber;
  • the matching liquid 4 fills the region between the end face of the optical fiber 2 and the glass plate 3 in the casing 1;
  • the matching liquid circulation device 5 is internally provided with matching liquid, and is located Outside the casing 1, it circulates through the hole provided on the casing 1 near the matching liquid setting area and the matching liquid inside the casing 1;
  • the lens 6 is disposed outside the casing near the glass plate, and each fiber is passed through The light that
  • the light output from the fiber is usually converted into parallel light and then processed, so the collimator is the basis of other passive components.
  • the collimator proposed by the invention is actually developed on the basis of the high power fiber head proposed in the present invention, and the conversion of light and parallel light in the optical fiber is completed by adding a lens.
  • the idea of solving the problem is the same as that of the fiber optic head, and will not be described again.
  • FIG. 3 is a schematic structural diagram of a second high power fiber collimator according to the present invention. It consists of N (N is greater than or equal to 1) fiber 2, lens 6, housing 1, matching liquid 4 and matching liquid circulation device 5, wherein: N fiber 2 end
  • N fiber 2 end The optical axes are bonded together in parallel and are sealed on the casing 1 through holes in the casing 1.
  • the N fiber ends are ground to a plane, and the plane normal is at an angle to the fiber axis; the lens 6 is sealed.
  • the matching liquid 4 is filled in the housing between the end face of the optical fiber and the lens;
  • the matching liquid circulation device 5 is internally provided with matching liquid, and is located in the housing 1 Externally, it circulates through the hole provided in the casing 1 near the matching liquid setting area and the matching liquid inside the casing 1.
  • light output from each of the two optical fibers passes through the matching liquid 4 and the lens 6 and is output as parallel light to the free space, or parallel light from the free space is passed through the matching liquid 4 by the lens 6. Coupled into the corresponding fiber in 2.
  • the high-power collimator is formed by replacing the glass plate in the high-power fiber head proposed by the present invention with a lens.
  • the structure is simpler.
  • the fiber end face and the surface of the lens that is in contact with the matching liquid do not need to be coated, and the matching liquid reduces the loss caused by the Snell reflection.
  • the fiber end angle can cause the Snell reflection to leak out of the fiber and suppress the echo.
  • the structure greatly reduces the optical power density of the exit surface of the lens, and the flowing matching liquid controls the temperature of the entire device. In combination, the probability of damage of the high power laser to the film on the exit surface of the lens can be greatly reduced, and the optical fiber can be made
  • the straightener works in a high power state for a long time.
  • FIG. 4 is a schematic structural view of a high power optical fiber isolator according to the present invention. It consists of an input high power collimator 71(1), a separator 8 and an output high power collimator 71(2), wherein the isolator 8 is located at the high power input collimator 71(1) and high power. Between the output collimators 71(2), the light from the fiber input into the high power collimator 71(1) passes through the isolator 8 and is coupled to the fiber of the output high power collimator 71(2).
  • High-power fiber collimators are mainly used in fiber lasers so that light on the entire optical transmission link cannot be fed into the cavity.
  • the high power fiber collimator can adopt either the structure shown in FIG. 2 or the structure shown in FIG. Isolators are available in a variety of forms and are well known to those skilled in the art and will not be described here.
  • FIG. 5 is a schematic structural diagram of a first high power fiber frequency domain combiner according to the present invention. It consists of N (N is greater than or equal to 2) input single pigtail collimator, (N-1) filter and 1 output single pigtail collimator, wherein: N input single pigtail high power collimation
  • the controller outputs N different wavelengths of collimated light ⁇ 1 , ⁇ 2 , ..., ⁇ N , the first single-tailed fiber high-power collimator 71 (1) and the second single-tailed fiber high-power collimator 71 (2)
  • the emitted light transmission direction is at a certain angle, and a first filter 7B(1) is disposed at the intersection of the two beams, the filter transmits the light of the wavelength ⁇ 1 , and the light of ⁇ 2 is reflected and synthesized.
  • a second filter 7B is placed at the intersection of the beam with the light ⁇ 3 emitted by the third single pigtail collimator 71 (3) (2)
  • the filter transmits the beam ( ⁇ 1 + ⁇ 2 ), reflects ⁇ 3 , and combines the two beams into a beam ( ⁇ 1 + ⁇ 2 + ⁇ 3 ), and so on, by the (N- 1)
  • the light output from the filter 7B (N-1) is ( ⁇ 1 + ⁇ 2 + ... + ⁇ N ), and its propagation direction is the same as the direction of ⁇ 1 , and the beam is outputted through a single-tailed high-power collimator.
  • 71 (N+1) is coupled into the fiber of the output collimator to achieve frequency domain combining.
  • the high power fiber frequency domain combiner is used in the frequency domain combining of the output light of the high power laser.
  • the high-power fiber collimator used therein can adopt either the structure shown in FIG. 2 or the structure shown in FIG.
  • the filter used may be a film type filter or a body grating type filter. The specific form of these filters is well known to those skilled in the art and will not be described herein.
  • FIG. 6 is a schematic structural diagram of a second high power optical fiber frequency domain combiner according to the present invention.
  • FIG. 6A shows a reflection structure
  • FIG. 6B shows a transmission structure.
  • N different wavelengths of parallel light emitted by the N-tail fiber collimator 7N are irradiated onto the reflective diffraction grating 9, and the diffraction grating 9 diffracts the N-beam light in the same direction.
  • the parallel light is merged into the same fiber through a single pigtail collimator 71.
  • N wavelengths of parallel light having a certain angle emitted by the N pigtail collimator 7N are irradiated onto the transmission diffraction grating 9, and the transmission grating 9 diffracts the N beams into the same direction.
  • the parallel light is merged into the same fiber by a single pigtail collimator 71.
  • the N fibers in the collimator with N pigtails are arranged in one dimension, and the structure shown in FIG. 2 or the structure shown in FIG. 3 can be used.
  • the diffraction gratings used may be either blazed gratings or bulk gratings, which are well known to those skilled in the art and will not be described again here.
  • FIG. 7 is a schematic structural diagram of a third high power fiber frequency domain combiner according to the present invention.
  • the utility model is composed of a double pigtail high power collimator 72, a filter 7B and a single pigtail high power collimator 71, wherein: one fiber in the double pigtail high power collimator 72 is an incident fiber, and the other fiber is another fiber.
  • the parallel light of a certain wavelength emitted by the incident fiber is irradiated onto the filter 7B, and is reflected and coupled into the output fiber of the double-tailed high-power collimator 72;
  • the parallel light of another wavelength output by the straight unit 71 is irradiated onto the filter 7B, and is transmitted and coupled to the exit fiber of the twin pigtail high power collimator 72.
  • the twin-tailed collimator and the single-tailed fiber collimator can adopt either the structure shown in FIG. 2 or the structure shown in FIG.
  • the filter used is a thin film filter, which is well known to those skilled in the art and will not be described here.
  • Example 1 We have fabricated a single-tail fiber optic head for fiber lasers and fiber amplifiers using the high power fiber tip scheme proposed by the present invention.
  • the fiber is a double-clad fiber with a core diameter of 20 ⁇ m, a numerical aperture of 0.08, an inner cladding diameter of 400 ⁇ m, a numerical aperture of 0.46, an optical fiber end face that is ground to an angle of 8 degrees, and a glass plate with a thickness of 1 mm.
  • the quartz plate has a high-strength film on the exit surface, and the distance between the glass plate and the matching liquid is about 5 mm.
  • the matching liquid can be a liquid having a refractive index close to that of quartz glass such as glycerin, turpentine, olive oil or water. This fiber tip can be used in fiber lasers larger than 1 kW.
  • Example 2 We fabricated a fiber optic head for a power combiner for fiber lasers and fiber amplifiers using the high power fiber tip scheme proposed by the present invention.
  • a simple method is to put the outputs of the fibers side by side.
  • the output fiber parameters of each laser are core diameter 20 ⁇ m, numerical aperture 0.08, inner cladding diameter 400 ⁇ m, numerical aperture 0.46, etched 4 fiber ends to 30 ⁇ m, arranged in a 60 ⁇ 60 ⁇ m square, and the end faces Grind into an 8 degree angle.
  • the glass plate is a quartz plate with a thickness of 1 mm, and the exit surface is plated with a high-strength film.
  • the distance between the glass plate and the matching liquid is about 10 mm.
  • the matching liquid can be made of glycerin, turpentine, olive oil or water with a refractive index close to that of quartz glass. liquid.
  • This fiber tip can be used in fiber lasers with a combined power of more than 5 kW.
  • Example 3 We made a collimator using the first high-power fiber collimator scheme proposed by the present invention.
  • the parameters are as follows: the fiber is a double-clad fiber with a core diameter of 20 ⁇ m, a numerical aperture of 0.08, and an inner cladding diameter. 400 micron, numerical aperture 0.46, the fiber end face is ground to 8 degrees; the glass plate is a quartz plate with a thickness of 1 mm, the exit surface is coated with a high-strength film, the distance between the glass plate and the matching liquid is about 5 mm, and the matching liquid can be used.
  • a liquid such as glycerin, turpentine, olive oil or water that has a refractive index close to that of quartz glass.
  • the focal length of the lens is 35 mm. This fiber collimator can be used in applications larger than 1 kW.
  • Example 4 We made a collimator using the second high-power fiber collimator scheme proposed by the present invention.
  • the parameters are as follows: the fiber adopts a single-clad large-mode field fiber with a core diameter of 20 ⁇ m and a numerical aperture of 0.08.
  • the cladding diameter is 125 microns, the fiber end face is ground to an angle of 8 degrees; the lens is made of quartz glass with a focal length of 10 mm, and the exit surface is coated with a high-strength film;
  • the matching solution can use refractive index and quartz such as glycerin, turpentine, olive oil or water. Glass close to the liquid.
  • This fiber collimator can be used in applications larger than 1 kW.
  • Example 5 We fabricated an isolator using the high power fiber optic isolator scheme proposed by the present invention.
  • the isolator uses the collimator given in Example 4, and the spacer uses two wedge angles plus one rotating piece. Its parameters are: insertion loss of 0.4dB, isolation of 50dB. Can be used in applications greater than 500 watts.
  • Example 6 We used the first high power fiber frequency domain combiner scheme proposed by the present invention to fabricate a combiner for combining the light output by three fiber lasers.
  • the collimator uses the collimator given in Example 3.
  • the input wavelengths of the three collimators are 1046 nm, 1056 nm, and 1066 nm, respectively;
  • the filter can be a film-type cut-off filter or a photothermal Folding body grating, the first filter allows 1046 nm to pass, making the other two wavelengths Reflected, the second filter allows 1046 and 1056 to pass, causing 1066 to reflect.
  • the combiner can achieve the combination of three kilowatt lasers.
  • Example 7 We used the second high-power fiber-frequency frequency domain combiner scheme proposed by the present invention to fabricate a beam combiner for combining the light output by three fiber lasers.
  • the collimator with three pigtails uses the collimator given in Example 3.
  • the input wavelengths of the three fibers are 1046 nm, 1056 nm and 1066 nm, respectively; the diffraction grating reflective blazed grating.
  • the combiner can achieve the combination of three hundred-watt lasers.
  • Example 8 We used a third high power fiber frequency domain combiner scheme proposed by the present invention to fabricate a combiner for combining the light output by two fiber lasers.
  • the collimator with two pigtails uses the collimator given in Example 3.
  • the input wavelengths of the two fibers are 1046 nm and 1056 nm, respectively;
  • the filter uses a film-type cut-off filter, 1046 nm passes, 1056 Nano reflection.
  • the combiner can achieve the combination of two kilowatt lasers.
  • the high-power optical fiber passive device proposed by the invention can reduce the manufacturing cost and increase the competitiveness of the high-power fiber laser relative to other kinds of lasers.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

L'invention concerne un groupe de dispositifs passifs à fibre optique de forte puissance comprenant une tête de fibre optique de forte puissance, un collimateur de fibre optique de forte puissance, un isolateur de fibre optique de forte puissance et un combineur de fréquence de forte puissance. La tête de fibre optique de forte puissance se compose de N (N étant supérieur ou égal à 1) fibres optiques (2), d'une lame de verre (3), d'un boîtier (1), d'un liquide d'adaptation (4) et d'un dispositif de mise en circulation de liquide d'adaptation (5). Les extrémités des N fibres optiques (2) sont reliées les unes aux autres parallèlement à l'axe optique et sont scellées au boîtier (1) à travers le trou ménagé sur le boîtier (1). Les faces d'extrémité des N fibres optiques (2) sont polies de manière plane et la normale aux plans et l'axe des fibres optiques (2) forment un certain angle. La lame de verre (3) est fixée de manière étanche à un trou ménagé dans la zone du boîtier (1) passant par l'axe des fibres optiques (2). Le liquide d'adaptation (4) est disposé dans la région située entre les extrémités des fibres optiques (2) et la lame de verre (3) dans le boîtier (1). Le dispositif de mise en circulation de liquide d'adaptation (5) est rempli de liquide d'adaptation (4) et est disposé à l'extérieur du boîtier (1). Le liquide d'adaptation (4) présent dans le boîtier (1) est mis en circulation à travers le trou ménagé sur le boîtier (1) à proximité de la zone de mise en place du liquide d'adaptation (4) par le dispositif de mise en circulation de liquide d'adaptation (5). Une solution pour le traitement des faces d'extrémité de la fibre optique destinée à remédier à l'endommagement de forte puissance à l'extrémité de la fibre optique est proposée. L'invention concerne également une tête de fibre optique de forte puissance, un collimateur de fibre optique de forte puissance, un isolateur de fibre optique de forte puissance et un combineur de fréquence de forte puissance basé sur cette technologie. Le coût de fabrication de ces dispositifs est en outre sensiblement réduit.
PCT/CN2014/088938 2013-12-05 2014-10-20 Tête de fibre optique de forte puissance, collimateur, isolateur et combineur de fréquence WO2015081758A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310687765.2 2013-12-05
CN201310687765.2A CN104698543A (zh) 2013-12-05 2013-12-05 大功率光纤头、准直器、隔离器及频域合束器

Publications (1)

Publication Number Publication Date
WO2015081758A1 true WO2015081758A1 (fr) 2015-06-11

Family

ID=53272851

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/088938 WO2015081758A1 (fr) 2013-12-05 2014-10-20 Tête de fibre optique de forte puissance, collimateur, isolateur et combineur de fréquence

Country Status (2)

Country Link
CN (1) CN104698543A (fr)
WO (1) WO2015081758A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114865434A (zh) * 2022-04-24 2022-08-05 复旦大学 光纤一体化端帽及其制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110673274A (zh) * 2019-10-25 2020-01-10 浙江光塔节能科技有限公司 一种光纤适配器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101043118A (zh) * 2007-03-23 2007-09-26 清华大学 一种液体导引泵浦光束的方法及装置
CN202305881U (zh) * 2011-11-09 2012-07-04 中国计量学院 一种多芯光纤与多根单芯光纤耦合器
CN102891430A (zh) * 2011-12-22 2013-01-23 清华大学 光纤高功率激光输出端面反馈抑制装置
CN203259686U (zh) * 2013-05-23 2013-10-30 深圳市天阳谷科技发展有限公司 光纤准直器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101043118A (zh) * 2007-03-23 2007-09-26 清华大学 一种液体导引泵浦光束的方法及装置
CN202305881U (zh) * 2011-11-09 2012-07-04 中国计量学院 一种多芯光纤与多根单芯光纤耦合器
CN102891430A (zh) * 2011-12-22 2013-01-23 清华大学 光纤高功率激光输出端面反馈抑制装置
CN203259686U (zh) * 2013-05-23 2013-10-30 深圳市天阳谷科技发展有限公司 光纤准直器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114865434A (zh) * 2022-04-24 2022-08-05 复旦大学 光纤一体化端帽及其制备方法

Also Published As

Publication number Publication date
CN104698543A (zh) 2015-06-10

Similar Documents

Publication Publication Date Title
JP5876612B2 (ja) 非円形状の光ビームに信号ビームを結合するための光ファイバーカプラー
JP6501869B2 (ja) 非対称冷却を有する非対称平面導波路
US6546169B1 (en) Pump couplers for double-clad fiber devices
CN104901155B (zh) 一种高功率光纤激光泵浦光耦合与信号光扩束输出装置
CN103454730A (zh) 一种光纤准直器
TWI232967B (en) Small mode-field fiber lens
CN101556352B (zh) 一种抑制传能光纤包层模式传播的方法
US7978943B2 (en) Monolithic pump coupler for high-aspect ratio solid-state gain media
CN206283096U (zh) 光路简单的百瓦级钬激光系统
WO2015081758A1 (fr) Tête de fibre optique de forte puissance, collimateur, isolateur et combineur de fréquence
CN103499856B (zh) 百瓦级准直型隔离器
WO2015081759A1 (fr) Combineur de puissance à fibres optiques de forte puissance
CN203551835U (zh) 百瓦级准直型隔离器
CN204065464U (zh) 一种液冷百瓦级多模光纤在线光隔离器
CN103487891B (zh) 百瓦级在线型隔离器
CN214954213U (zh) 一种高功率光隔离器、wdm、合束器的集成光器件
CN104142535A (zh) 一种液冷百瓦级多模光纤在线光隔离器
CN203932660U (zh) 一种高功率多芯光纤激光器
CN113820792A (zh) 一种基于热扩芯阵列尾纤的扇入扇出器及其实现方法
JP6540310B2 (ja) 光ファイバ端末
CN103368069A (zh) 一种降低高阶模的激光器结构
CN103499890B (zh) 千瓦级准直型隔离器
CN103605181B (zh) 百瓦级高隔离度在线型光隔离器
CN203551836U (zh) 百瓦级高隔离度准直型光隔离器
WO2014168040A1 (fr) Structure de couplage optique

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14867060

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14867060

Country of ref document: EP

Kind code of ref document: A1