CN103487887B - A kind of different wave length multi-pass Laser synthesizing and transmitting device and using method thereof - Google Patents
A kind of different wave length multi-pass Laser synthesizing and transmitting device and using method thereof Download PDFInfo
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Abstract
The invention discloses a kind of different wave length multi-pass Laser synthesizing and transmitting device and using method thereof, its device comprises multiple laser shaping and is coupled into fine device, each laser shaping is coupled into fine device and is communicated with fused biconical taper bundling device respectively by input optical fibre, and fused biconical taper bundling device is communicated with laser shaping fiber device by output optical fibre.Its using method comprises the following steps: (i), when first time uses, collimate and be coupled into fibre to laser output laser beam; (II) carries out shaping to the laser beam that fused biconical taper bundling device exports; When (III) reuses, the collimation of laser beam is finely tuned.The present invention forms simply, conveniently regulate, dirigibility is high, reproducible, transfer efficiency is high.
Description
Technical field
The invention belongs to a kind of Laser synthesizing transmitting device, be specifically related to a kind of different wave length multi-pass Laser synthesizing and transmitting device and using method thereof.
Background technology
At laser Applied research fields, sometimes need, by a branch of for the Laser synthesizing of multi beam different wave length, to act on research object simultaneously, as studied the excitation spectrum of certain atom, or certain atom excite ionization path etc.This just requires that a few bundle light compositing degree is high, and laser can coincide together well near field and far field.Meanwhile, because what utilize in research process is the energy of laser, thus after synthesis in transmitting procedure loss little, in order to ensure the reliability of experimental data, also require that synthesis transmission system has certain stability and repeatability.
The synthesis of different wave length laser and the development of transmission technology have very long history, but all belong to spatial beam synthetic technology, as sheet glass method, lens method, optical filter method, crystal method, coating method, low-angle synthetic method etc., all there are some shortcomings in these classic methods, be summed up as: (i) synthesis region is little, and only overlap at application point place, the zone of action is little, or synthesis region is not exclusively overlapping, synthesis degree is low; (II) composite wave long number is restricted, and some method is just not suitable for the synthesis of multi-pass principle; (III) wavelength to synthesis has certain requirement, is not suitable for the light compositing that wavelength is close; It is complicated that beam system is closed in (IV) space, poor stability, and loss is large, and cost is high, regulates difficulty etc.And spectral investigation or excite ionization research institute to relate to wavelength coverage large, also usually use the multi-pass synthesis that wavelength is close, require that the synthesis degree of light beam is high, the degree of overlapping of light beam and active region is high simultaneously, the good stability of system, to ensure experimental repeatability and the data reliability of Mass Spectra.
At present, the sharp combiner of prior art and transmitting device and using method also exist close beam system huge, complicated, regulate the series of problems such as difficult, dirigibility is low, poor repeatability, transfer efficiency are low.
Summary of the invention
The present invention solves in prior art the technical matters existed to propose, and its objective is that to provide a kind of volume little, is convenient to regulate, dirigibility and the high different wave length multi-pass Laser synthesizing of transfer efficiency and transmitting device and using method thereof.
Technical scheme of the present invention is: optical fiber synthesis and transmitting device and using method thereof, comprise multiple laser shaping and be coupled into fine device, each laser shaping is coupled into fine device and is communicated with fused biconical taper bundling device respectively by input optical fibre, fused biconical taper bundling device is communicated with laser shaping fiber device by output optical fibre, described laser shaping is coupled into fine device and is included in same base keeps at a certain distance away from left to right each other and is respectively arranged with No. I diaphragm, input shaper lens combination, input focus lens, incident optical holding frame and No. II diaphragm, described laser shaping fiber device is included in same base keeps at a certain distance away from left to right each other and is respectively arranged with output optical fibre holding frame, short focus lens, output Shaping lens combination and output condenser lens.
Described input shaper lens combination is made up of two lens, and described output Shaping lens combination is made up of two lens.
Described input optical fibre is placed on incident optical holding frame, makes the port of input optical fibre be placed in the focus place of input focus lens, and the output terminal of described output optical fibre is arranged in the front focus position of the short focus lens of laser shaping fiber device.
The described each element central be coupled in fine device or fiber device is on respective same center line respectively.
Described a kind of different wave length multi-pass Laser synthesizing and transmitting device, its using method, comprises the following steps:
(i), when first time uses, laser output laser beam is collimated
No. I diaphragm regulating the adjusting knob of laser total reflective mirror to make laser beam pass through to have collimated and the clear aperature of No. II diaphragm, make No. I diaphragm, the aperture center of No. II diaphragm is coaxial with beam center, then laser beam just becomes collimated light beam, input shaper lens combination is added in order to adjust laser beam spot size after No. I diaphragm, light beam after adjustment is through input focus lens focus, focal spot is positioned on incident optical end face, adjusting knob on careful adjustment incident optical holding frame and the adjusting knob of input focus lens, focused beam is made to be coupled into input optical fibre, laser powermeter monitoring is added after the output terminal of output optical fibre, enter in fine process to need from low-power at adjustment laser, progressively improve power, until it is maximum to reach transfer efficiency,
(II) is to synthesizing through fused biconical taper bundling device and carrying out shaping by the laser beam that output optical fibre exports
Through the synthesis of fused biconical taper bundling device and the laser exported by output optical fibre becomes the divergent light source of similar pointolite at output terminal, divergent light source shaping is needed to become parallel beam or focused beam in application, Output of laser becomes directional light after short focus lens, export condenser lens to focus on light beam, make beam focus fall within the region of light and atomic interaction;
When (III) reuses, the collimation of laser beam is finely tuned
Because closedown and the unlatching of each laser instrument all can have some small differences, therefore, when reusing fused biconical taper optical-fiber bundling system, need to finely tune the collimation of laser beam, ensure position and the collimation of light beam, now only need finely tune the adjusting knob of laser total reflective mirror, the clear aperature place making light beam get to No. I diaphragm makes beam center and clear aperature center superposition.
Beneficial effect of the present invention
(i) the present invention utilizes fused biconical taper technology to carry out the conjunction bundle of the laser of multi beam different wave length, makes to close bundle technology not by the restriction of wavelength, expands the range of application of closing bundle technology.(II) utilizes fused biconical taper technology to carry out the conjunction bundle of multiple laser, makes to close light beams no longer by the restriction in space, decreases the use of a large amount of optical device simultaneously, improves the stability of system, add the security of system simultaneously.The use of (III) diaphragm, can reduce laser beam ambient stray light to the threat of fiber end face, extended fiber serviceable life, makes light beam precise positioning simultaneously, while simplifying the operation, improves the repeatability of system.The lens that (IV) is coupled in fine device and coupling fiber device can be changed according to different beam qualities and function demand, make system more flexible, can be applicable in different laser systems.(V) structure of the present invention is simple, be easy to modularization, and Dynamic System is simple, more flexibly and easily.
Accompanying drawing explanation
Fig. 1 is single unit system of the present invention composition schematic diagram;
Fig. 2 is that laser shaping of the present invention is coupled into fine device schematic diagram;
Fig. 3 is laser shaping fiber device schematic diagram of the present invention;
Fig. 4 is application connection diagram of the present invention.
Wherein:
1 laser shaping is coupled into fine device 2 input optical fibre
3 fused biconical taper bundling device 4 output optical fibres
5 laser shaping fiber devices, 6 No. I diaphragms
7 input shaper lens combination 8 input focus lens
9 No. 10 II, incident optical holding frame diaphragms
The short focus lens of 11 output optical fibre holding frame 12
13 output Shaping lens combination 14 export condenser lens
15 laser instrument 16 laser total reflective mirrors
17 atomic vapour stove 18 light and atom active region
19 lens 20 bases
21 baffle plates.
Embodiment
Below, with reference to drawings and Examples, a kind of different wave length multi-pass Laser synthesizing of the present invention and transmitting device and using method thereof are described in detail:
As shown in Figures 1 to 3, a kind of different wave length multi-pass Laser synthesizing and transmitting device, comprise multiple laser shaping and be coupled into fine device 1, the present embodiment is four, each laser shaping is coupled into fine device 1 and is communicated with fused biconical taper bundling device 3 respectively by input optical fibre 2, and fused biconical taper bundling device 3 is communicated with laser shaping fiber device 5 by output optical fibre 4.
Wherein, laser shaping is coupled into fine device 1 and is included in same base 20 keeps at a certain distance away from left to right each other and is respectively arranged with No. I diaphragm 6, input shaper lens combination 7, input focus lens 8, incident optical holding frame 9 and No. II diaphragm 10, and input shaper lens combination 7 is made up of two lens 19.
Wherein, laser shaping fiber device 5 is included in same base 20 keeps at a certain distance away from left to right each other and is respectively arranged with output optical fibre holding frame 11, short focus lens 12, output Shaping lens combination 13 and exports condenser lens 14, and output Shaping lens combination 13 is made up of two lens 19.
Input optical fibre 2 is placed on incident optical holding frame 9, makes the port of input optical fibre 2 be placed in the focus place of input focus lens 8.The output terminal of output optical fibre 4 is arranged in the front focus position of the short focus lens 12 of laser shaping fiber device 5.
Each element that laser shaping is coupled in fine device 1 is on respective same center line respectively with each element central gone out in laser shaping fiber device 5.
As shown in Figure 4, when the present invention in use, its annexation is: be coupled at laser shaping the laser instrument 15 that fine device 1 input end accesses multiple output different wave length respectively, the present embodiment is three, the output light path being coupled into each laser instrument between fine device 1 at laser instrument 15 and laser shaping is respectively arranged with two parallel to each other and become 45 with level
οthe laser total reflective mirror 16 at angle, and be coupled between fine device 1 at laser total reflective mirror 16 and laser shaping baffle plate 21 is set.The Shu Zaijing output condenser lens 14 that intensifies after the output terminal shaping of laser shaping fiber device 5 focuses on the light and atom active region 18 that enter in atom vapor stove 17, and the focus exporting condenser lens 14 is positioned at light and atom active region 18.
Using method of the present invention, comprises the following steps:
(i), when first time uses, laser instrument 15 outgoing laser beam is collimated
The adjusting knob of laser total reflective mirror 16 is regulated to make laser beam by the clear aperature of good No. I diaphragm 6 of two collimations in a distance and No. II diaphragm 10, make the aperture center of No. I diaphragm 6, No. II diaphragm 10 coaxial with beam center, then laser beam just becomes collimated light beam.Input shaper lens combination 7 after No. I diaphragm 6 adjusts laser beam spot size, and the light beam after adjustment focuses on through input focus lens 8, and focal length is selected according to beam quality and optical fiber parameter, and the coupling incidence making the light beam after focusing meet optical fiber requires to determine.Three input optical fibres 2 are placed in respectively on respective incident optical holding frame 9, the port of input optical fibre 2 is placed in the focus place of condenser lens 8, adjusting knob on careful adjustment optical fiber clamping frame 9 (up and down, left and right, before and after three-dimensional translating regulate) and input focus lens 8 adjusting knob (up and down, the rotation of left and right regulates), focused beam is made to be coupled into input optical fibre 2, and monitor with laser powermeter after the output terminal of output optical fibre 4, enter in fine process to need from low-power at adjustment laser, progressively improve power, each power level regulates until transfer efficiency is maximum.
(II) is to synthesizing through fused biconical taper bundling device 3 and carrying out shaping by the laser beam that output optical fibre 4 exports
The laser exported through fused biconical taper bundling device 3 to become the divergent light source of similar pointolite at output terminal, for meeting the power density requirements of light and atomic interaction, needs become parallel beam or focused beam divergent light source shaping.The output terminal of output optical fibre 4 is held on output optical fibre holding frame 11, thereafter short focus lens 12 is added, the output end face of output optical fibre 4 is made to be positioned at the front focus place of short focus lens 12, then Output of laser becomes directional light after short focus lens 12, after short focus lens 12, add shaping lens group 13 carry out the bundle that expands or contract, then experimentally to the requirement of hot spot, after shaping lens group 13, add condenser lens 14 pairs of light beams focus on, beam focus is fallen within the region of light and atomic interaction.
When (III) reuses, the collimation of laser beam is finely tuned
Because closedown and the unlatching of each laser instrument all can have some small differences, therefore, when reusing fused biconical taper optical-fiber bundling system, need to finely tune the collimation of laser beam, ensure position and the collimation of light beam.Now only need finely tune the adjusting knob of laser total reflective mirror 16, the clear aperature place making light beam get to No. I diaphragm 6 makes beam center and clear aperature center superposition, without the need to regulating lens below and optical fiber again.
The course of work of the present invention:
Three export the laser of three kinds of different wave lengths by the dye laser 15 of different dyes as actuating medium, after optimizing laser power, put up outer light path, and regulate laser total reflective mirror 16, make beam collimation with laser total reflective mirror 16.After laser total reflective mirror 16, a baffle plate is put before laser shaping is coupled into fine device 1, translation baffle plate makes laser spill tens milliwatt laser from the edge of baffle plate, input shaper lens combination 7 is added to adjust laser beam spot size after No. I diaphragm 6, light beam after adjustment focuses on through input focus lens 8, with power score do not measure laser enter optical fiber before with ECDC bundle optical-fiber bundling after the power that exports, under the monitoring of power meter, adjusting knob on careful adjustment incident optical holding frame 9 (up and down, left and right, before and after three-dimensional translating regulate) and input focus lens 8 adjusting knob (up and down, the rotation of left and right regulates), focused beam is made to be coupled into input optical fibre 2 and after fused biconical taper bundling device 3 and output optical fibre 4 export, transfer efficiency reaches maximum, then slowly baffle plate is pulled open, make the light that spills stronger, continue under the monitoring of power meter, repeat to carry out optimal coupling input efficiency to the adjustment of incident optical holding frame 9 and input focus lens 8, optical-fiber bundling efficiency is made to be issued to maximum at this power, continue to pull baffle plate, repeated optimization step, until the whole energy of laser beam is coupled into fibre with maximal efficiency.Then the laser coupled completing other two dye lasers successively respectively enters optical-fiber bundling device.
After three beams of laser is all coupled into fused biconical taper bundling device 3, output terminal fused biconical taper being closed the output optical fibre 4 of beam system is fixed on output optical fibre holding frame 11, light beam is made to enter laser shaping fiber device 5, the output terminal of output optical fibre 4 is arranged in the front focus position of the short focus lens 12 of fiber device 5, the front and back of fine setting output optical fibre holding frame 11, laser is made to become directional light after short focus lens 12, enter output Shaping lens combination 13, according to application requirement, laser beam is expanded or the shaping of contracting bundle, laser beam after shaping focuses on through exporting condenser lens 14 light and atom active region 18 that enter in atomic vapour stove 17 again, the focus exporting condenser lens 14 is positioned at light and atom active region 18, the interaction completing light and atom is tested.
Structure of the present invention is simple, be easy to modularization, Dynamic System simply, more flexible, close bundle efficiency and generally can reach more than 80%.
Claims (4)
1. a different wave length multi-pass Laser synthesizing and transmitting device, it is characterized in that: comprise multiple laser shaping and be coupled into fine device (1), each laser shaping is coupled into fine device (1) and is communicated with fused biconical taper bundling device (3) respectively by input optical fibre (2), fused biconical taper bundling device (3) is communicated with laser shaping fiber device (5) by output optical fibre (4), described input optical fibre (2) incidence end is placed on incident optical holding frame (9), the port of input optical fibre (2) is made to be placed in the focus place of input focus lens (8), the output terminal of described output optical fibre (4) is arranged on the output optical fibre holding frame (11) of laser shaping fiber device (5), output optical fibre holding frame (11) is positioned at the front focus position of short focus lens (12), described laser shaping is coupled into fine device (1) and is included in base (20) keeps at a certain distance away from left to right each other and is respectively arranged with No. I diaphragm (6), input shaper lens combination (7), input focus lens (8), incident optical holding frame (9) and No. II diaphragm (10), described laser shaping fiber device (5) is included in base (20) keeps at a certain distance away from left to right each other and is respectively arranged with output optical fibre holding frame (11), short focus lens (12), output Shaping lens combination (13) and output condenser lens (14).
2. a kind of different wave length multi-pass Laser synthesizing according to claim 1 and transmitting device, it is characterized in that: described input shaper lens combination (7) is made up of two lens (19), described output Shaping lens combination (13) is made up of two lens (19).
3. a kind of different wave length multi-pass Laser synthesizing according to claim 1 and transmitting device, is characterized in that: described laser shaping is coupled into each element in fine device (1) and each element central in laser shaping fiber device (5) is on respective same center line respectively.
4., with a kind of different wave length multi-pass Laser synthesizing according to claim 1 and transmitting device, its using method, comprises the following steps:
I () first time, when using, collimates laser instrument (15) outgoing laser beam
No. I diaphragm (6) regulating the adjusting knob of laser total reflective mirror (16) to make laser beam pass through to have collimated and the clear aperature of No. II diaphragm (10), make No. I diaphragm (6), the aperture center of No. II diaphragm (10) is coaxial with beam center, then laser beam just becomes collimated light beam, input shaper lens combination (7) is added in order to adjust laser beam spot size after No. I diaphragm (6), light beam after adjustment focuses on through input focus lens (8), focal spot is positioned on input optical fibre (2) end face, adjusting knob on careful adjustment incident optical holding frame (9) and the adjusting knob of input focus lens (8), focused beam is made to be coupled into input optical fibre (2), laser powermeter monitoring is added after the output terminal of output optical fibre (4), enter in fine process to need from low-power at adjustment laser, progressively improve power, until it is maximum to reach transfer efficiency,
(II) carries out shaping to synthesizing through fused biconical taper bundling device (3) and passing through the laser beam that output optical fibre (4) exports
Synthesize through fused biconical taper bundling device (3) and pass through laser that output optical fibre (4) exports to become similar pointolite divergent light source at output terminal, divergent light source shaping is needed to become parallel beam or focused beam in application, Output of laser becomes directional light after short focus lens (12), export condenser lens (14) to focus on light beam, make beam focus fall within the region of light and atomic interaction;
When (III) reuses, the collimation of laser beam is finely tuned
Because closedown and the unlatching of each laser instrument all can have some small differences, therefore, reuse different wave length multi-pass Laser synthesizing and transmitting device, need to finely tune the collimation of laser beam, ensure position and the collimation of light beam, now only need finely tune the adjusting knob of laser total reflective mirror (16), the clear aperature place making light beam get to No. I diaphragm (6) makes beam center and clear aperature center superposition.
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