CN211700917U - 1342nm single-frequency continuous light straight cavity amplifier and amplifying system - Google Patents
1342nm single-frequency continuous light straight cavity amplifier and amplifying system Download PDFInfo
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- CN211700917U CN211700917U CN202020314395.3U CN202020314395U CN211700917U CN 211700917 U CN211700917 U CN 211700917U CN 202020314395 U CN202020314395 U CN 202020314395U CN 211700917 U CN211700917 U CN 211700917U
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Abstract
The utility model discloses a 1342nm single-frequency continuous light straight cavity amplifier, mainly include two pumping couplers, gain medium and two trans-mirrors. The pump coupler clamping base can be adjusted in four dimensions, so that the pump light shaped and converged by the pump coupler is longitudinally overlapped with the seed light reflected by the reflecting mirror in the gain medium to amplify the energy of the seed light. The seed light is injected into the gain medium through the reflecting mirror, the pump couplers on two sides shape and converge the pump light in the positive direction and the negative direction and then inject the pump light into the gain medium, the seed light and the two beams of pump light are superposed in the gain medium, the seed light energy is amplified efficiently, and the characteristics of single longitudinal mode, narrow line width, tunable frequency, high beam quality and the like of the seed light are maintained.
Description
Technical Field
The utility model relates to a laser instrument technical field especially relates to a 1342nm single-frequency continuous light straight chamber amplifier and amplification system.
Background
The 1342nm single-frequency continuous light has the advantages of continuously tunable wavelength, stable performance, good monochromaticity and the like, and is widely applied to the fields of spectroscopy, coherent measurement, holography, quantum information and the like. Meanwhile, 1342nm single-frequency continuous light is also a main technical approach for emitting 671nm continuous light by second harmonic frequency multiplication.
In the market at present, solid laser devices emitting continuous tunable 1342nm single-frequency continuous light all have the defects of low energy and incapability of meeting use requirements, and in order to obtain a high-power single-frequency continuous tunable laser device, the emitted tunable 1342nm single-frequency continuous light needs to be amplified, so that the output 1342nm single-frequency continuous light meets the characteristics of single frequency, narrow line width, high frequency stability, high energy and the like.
Currently, there are several special structures for amplification, such as TA cone amplifier or fiber raman amplifier, which are suitable for low energy seed optical amplification, i.e. milliwatt power amplification to watt level, and the amplification capability is low. And not for higher energy seed light.
SUMMERY OF THE UTILITY MODEL
The utility model aims at that 1342nm single-frequency continuous light energy to solid laser outgoing among the prior art is lower, can not satisfy user demand's technical defect, and provide a 1342nm single-frequency continuous light straight cavity amplifier, mainly include two pumping couplers, gain medium and two trans-mirrors. The seed light is injected into the gain medium through the reflecting mirror, the pump couplers on two sides shape and converge the pump light in the positive and negative directions and then inject the pump light into the gain medium, the seed light and the two beams of pump light are superposed in the gain medium, and the seed light energy is efficiently amplified.
The utility model discloses a another purpose, a 1342nm single-frequency continuous light straight chamber amplifier system, including seed laser, battery of lens, two pumping light emitters and the straight chamber amplifier of above-mentioned 1342nm single-frequency continuous light.
For realizing the utility model discloses a technical scheme that the purpose adopted is:
the utility model provides a 1342nm single-frequency continuous light straight cavity amplifier, includes gain medium, sets up with the optical axis symmetry the first mirror and the second mirror that pass through of gain medium both sides, first mirror that passes through with the outside of second mirror that passes through is equipped with first pump coupler and second pump coupler respectively, first mirror reflection seed light, transmission that passes through the pump light that first pump coupler sent and join both, the second mirror that passes through the pump light that the second pump coupler sent, the seed light of first mirror transmission and two bundles of pump light of first mirror and second mirror transmission are in longitudinal coincidence gain amplification forms the amplified light in the gain medium, the second mirror reflection the amplified light of gain medium output.
In the above technical solution, the gain amplifier further comprises a base, wherein the gain medium is arranged in the middle of the base through a gain medium clamping base; the first pump coupler and the second pump coupler are symmetrically arranged at two ends of the base through a pump coupler clamping base respectively; the pump coupler clamping base can be adjusted in four dimensions, so that two beams of pump light after being shaped and converged by the first pump coupler and the second pump coupler are longitudinally overlapped with the seed light reflected by the transreflector in the gain medium.
In the technical scheme, a pumping coupling lens group consisting of a self-focusing lens, a concave mirror and a focusing lens is arranged in the first pumping coupler and the second pumping coupler, and the multiplying power of the pumping coupling lens group is 1 (1-5).
In the above technical solution, the ratio of the spot size of the pump light shaped and converged by the first pump coupler and the second pump coupler to the spot size of the seed light is 1: (0.8-1).
In the technical scheme, the gain medium is a YVO4-Nd: YVO4 bond and crystal or a YVO4-Nd: YVO4-YVO4 bond and crystal.
In the technical scheme, the gain medium is coated with the metal heat dissipation material and the water cooling assembly.
In the technical scheme, the gain medium clamping base can be adjusted in a front-back and left-right two-dimensional mode.
In the above technical solution, the base includes an optical platform for supporting the first pump coupler, the second pump coupler, the first transflective mirror and the second transflective mirror of the gain medium, and a lower cavity for mounting an auxiliary component.
The utility model discloses a further purpose, the light amplification method of the straight chamber amplifier of above-mentioned 1342nm single-frequency continuous light, seed light through first mirror reflection back with respectively through first pump coupler with two bundles of pump light that the second pump coupler plastic was assembled is vertical coincidence gain amplification in the gain medium and is formed the light of amplification, the light process of amplification the second mirror reflection back is shone out.
Another object of the present invention is to provide a 1342nm single-frequency continuous light straight cavity amplification system, which comprises a seed laser for emitting seed light, a lens set for isolating and shaping the seed light, two pump light emitters for emitting pump light, and the 1342nm single-frequency continuous light straight cavity amplifier; the lens group is located between the seed laser and the first lens, and the two pumping light emitters are located on the outer sides of the first pumping coupler and the second pumping coupler respectively.
In the above technical solution, the lens group includes a shaping lens for shaping the seed light, an isolator for isolating the reflected seed light, and a focusing lens for focusing the seed light.
In the above technical solution, the pump light emitter is an optical fiber coupled laser diode laser, the central wavelength of the output pump light is 880nm, the diameter of the optical fiber is 400um, and the numerical aperture n.a. is 0.22.
The utility model discloses a further purpose, above-mentioned 1342nm single-frequency continuous light straight chamber amplification system's light amplification method, including the following step:
step 1: after being isolated and shaped by a lens group, seed light emitted by a seed laser is reflected by a first transflective mirror and injected into a gain medium;
step 2: the two pump light emitters respectively emit two beams of pump light, and the two beams of pump light are respectively shaped and converged by the first pump coupler and the second pump coupler and then transmitted into the gain medium through the first transflective mirror and the second transflective mirror;
and 4, step 4: the amplified light passes out of the gain medium and is reflected by the second transflective mirror.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model provides a 1342nm single-frequency continuous light straight-cavity amplifier can be applied to the higher seed light of energy, keeps higher amplification efficiency simultaneously. For example, 1 watt of seed light may be amplified to 5 watts. If a multistage continuous amplification mode is adopted, the watt-level seed light can be amplified to dozens of watts, so that the amplification efficiency of the seed light energy is greatly improved, and the high-power 1342 laser has great advantages for obtaining high-power energy.
2. The utility model provides a 1342nm single-frequency continuous light straight-cavity amplifier mainly includes two pumping couplers, gain medium and two trans-mirrors. The seed light is injected into the gain medium through the reflecting mirror, the pump couplers on two sides shape and converge the pump light in the positive direction and the negative direction and then inject the pump light into the gain medium, the seed light and the two beams of pump light are superposed in the gain medium, the seed light energy is amplified efficiently, and meanwhile, the characteristics of single longitudinal mode, narrow line width, tunable frequency, high beam quality and the like of the seed light are maintained.
3. The utility model provides a 1342nm single-frequency continuous light straight cavity amplification system is supported by flat structural framework's base, wholly divide into two cavitys from top to bottom, and optical structure's device sets up at upper portion cavity, and all optical structure's device uses the light path as the core, evenly distributed on optical platform. And the lower cavity is mainly used for installing auxiliary components such as a water cooling pipeline, a controller and the like. The whole structure has high space utilization rate and stable structure.
4. The utility model provides an among the 1342nm single-frequency continuous light straight chamber amplification system's the light amplification method, seed light is at first through keep apart the plastic after in the gain medium is injected into through the mirror reflection. The specific isolation shaping method is that the seed light emitted by the seed laser is firstly shaped by a shaping lens, so that the divergent seed light is transmitted in parallel as much as possible; then, isolating the seed light returned along the original path by an isolator, avoiding the interference of the seed light and ensuring the stability of the seed light; and finally, focusing the shaped seed light to a proper spot size through a focusing lens and injecting the spot size into a gain medium, so that the seed light meets the requirement of efficient amplification. The ratio of the spot size of the pump light after being shaped and converged by the pump coupler to the spot size of the seed light is 1 (0.8-1), and the amplification efficiency of the seed light is higher in the range of the ratio.
Drawings
FIG. 1 is a schematic diagram of a single-frequency continuous-light straight-cavity amplifier;
fig. 2 shows a schematic diagram of the principle of the light amplification method.
In the figure: 1-isolator, 2-shaping lens, 3-focusing lens, 4-first lens, 5-second lens, 6-gain medium, 7-first pump coupler, 8-second pump coupler, 9-pump coupler clamping base, 10-gain medium clamping base, 11-base, 12-seed laser and 13-pump light emitter.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The utility model provides a 1342nm single-frequency continuous light straight-cavity amplifier, as shown in fig. 1, including gain medium 6, the first lens 4 that reflects seed light and transmits pump light, the second lens 5 that reflects amplification light and transmits pump light and the first pump coupler 7 and the second pump coupler 8 that converge the entering of two bundles of pump light shaping respectively gain medium 6, first lens 4 and second lens 5 are located respectively gain medium 6's both sides, two pump couplers 7,8 are located respectively first lens 4 with the outside of second lens 5, the seed light that passes through first lens 4 reflection and the first pump coupler 7 or second pump coupler 8 that pass through successively with first lens 4 or second lens 5 are in gain medium 6 merges.
The gain medium clamp comprises a base 11, wherein the gain medium 6 is arranged in the middle of the base 11 through a gain medium clamping base 10; the first pump coupler 7 and the second pump coupler 8 are symmetrically arranged at two ends of the base 11 through a pump coupler clamping base 9 respectively;
the gain medium clamping base 10 can be adjusted in a front-back and left-right two-dimensional mode;
the pump coupler clamping base 9 can be adjusted in four dimensions of up-down, pitching, front-back, left-right so that the pump light shaped and converged by the first pump coupler 7 and the second pump coupler 8 and the seed light reflected by the first transflective mirror 4 longitudinally coincide in the gain medium 6.
The first lens 4 and the second lens 5 are transparent to the pump light at 45 degrees and return to the seed light or the amplified light. The angle of the first transflective mirror 4 and the pump coupler clamping base 9 are adjusted to enable the seed light and the pump light to be superposed on the mirror surface of the first transflective mirror 4 as much as possible, so that two beams of light are consistent in the longitudinal direction when being focused into the gain medium 6, and the amplification efficiency is improved.
In the single-frequency continuous light straight-cavity amplifier, a pumping coupling lens group consisting of a self-focusing lens, a concave mirror and a focusing lens is arranged in the first pumping coupler 7 and the second pumping coupler 8, and the multiplying power of the pumping coupling lens group is 1 (1-5). Different multiplying power can be selected according to the amplification requirement so as to obtain the pumping light spot matched with the size of the seed light spot.
The ratio of the spot size of the pump light shaped and converged by the first pump coupler 7 and the second pump coupler 8 to the spot size of the seed light is 1 (0.8-1), and the amplification efficiency of the seed light is higher in the range of the ratio.
In the 1342nm single-frequency continuous light straight-cavity amplifier, the gain medium 6 is a YVO4-Nd: YVO4 bond and crystal or a YVO4-Nd: YVO4-YVO4 bond and crystal (manufacturer: Fujianfu crystal). The bonded crystal can effectively improve the problem of heat effect caused by low heat conductivity of the Nd: YVO4 crystal, avoid the damage of the end surface film layer due to high temperature and thermal stress, and improve the light damage resistance value.
Preferably, the gain medium 6 is externally coated with a metal heat dissipation material and a water cooling component. Since the seed light and the two pumping light beams are focused in the gain medium 6, the whole heat is large, so that a metal heat dissipation material, such as red copper with good heat conduction performance, is coated outside the gain medium 6, and the heat is taken away by a water cooling assembly to accelerate the heat dissipation. The water cooling assembly comprises a TEC and a water pipe, the TEC is externally connected with a temperature control power supply, and the water pipe is externally connected with a water cooling machine.
In addition, the 1342nm single-frequency continuous light straight-cavity amplifier can be used in series to form a multi-stage continuous amplification mode, that is, several 1342nm single-frequency continuous light straight-cavity amplifiers in the same shape are sequentially connected, and the amplified light emitted by the former 1342nm single-frequency continuous light straight-cavity amplifier is used as the seed light of the next 1342nm single-frequency continuous light straight-cavity amplifier for secondary amplification. The energy-saving high-power seed light source can amplify the watt-level seed light to dozens of watts, greatly improves the amplification efficiency of the energy of the seed light, and has great advantages for obtaining high-power energy 1342 laser.
Example 2
This embodiment is described with reference to embodiment 1.
The base 11 comprises an optical platform 11-1 for supporting the first pump coupler 7, the second pump coupler 8, the gain medium cavity 12 and the two transreflectors 4,5, and a lower cavity 11-2 for mounting auxiliary components.
The whole amplifier is supported by a base 11 of a flat plate type structure frame and is integrally divided into an upper cavity and a lower cavity, devices of an optical structure, such as the two pump couplers 7 and 8, the gain medium 6 and the two transflective mirrors 4 and 5, are arranged in the upper cavity, and all the devices of the optical structure take an optical path as a core and are uniformly distributed on an optical platform 11-1. And the lower cavity 11-2 is mainly used for installing auxiliary components such as a water cooling pipeline, an electric wire, a temperature control power supply and the like. The whole structure has high space utilization rate and stable structure.
Example 3
A1342 nm single-frequency continuous light straight-cavity amplification system comprises a seed laser 12 for emitting seed light, a lens group for isolating and shaping the seed light, two laser emitters 13 for emitting pump light, and the 1342nm single-frequency continuous light straight-cavity amplifier described in embodiment 1 or embodiment 2; the lens group is located between the seed laser 12 and the first transflective mirror 4, and the two pump light emitters 13 are respectively located outside the first pump coupler 7 and the second pump coupler 8.
Specifically, the lens group includes a shaping lens 2 for shaping the seed light, an isolator 1 for isolating the seed light reflected back, and a focusing lens 3 for focusing the seed light. The shaping lens 2 shapes the seed light to ensure that the divergent seed light is transmitted in parallel as much as possible; the isolator 1 isolates the seed light returned along the original path, avoids interfering the seed light and ensures the stability of the seed light. The focusing lens 3 mainly focuses the shaped seed light to a proper spot size and injects the spot size into the gain medium, so that the seed light meets the requirement of efficient amplification. The size of the focusing spot is determined by the power of the seed light, and is generally designed to be 200um to 1000 um.
In this embodiment, the seed light is 1342nm seed light emitted by a seed laser, and has excellent characteristics of a single longitudinal mode, a narrow line width, tunable frequency, high beam quality, and the like. The laser is single-frequency continuous light with linewidth less than 500kHz, good beam quality and M2<1.2, the energy is 1 watt, the frequency can be continuously adjusted, and the frequency stability is high.
The laser transmitter 13 adopts a fiber coupled laser diode laser, the central wavelength of the output pump light is 880nm, the diameter of the fiber is 400 μm, and the numerical aperture N.A. is 0.22. After the pumping light output by the fiber coupled laser diode laser is shaped and converged by the first pumping coupler 7 and the second pumping coupler 8, the pumping light is longitudinally focused and injected into the gain medium 6 from the positive direction and the negative direction through the end faces at the two sides of the gain medium 6.
The 1342nm single-frequency continuous light straight cavity amplification system can improve the energy of 1342nm single-frequency continuous light and keep the characteristics of single longitudinal mode, narrow line width, tunable frequency, high beam quality and the like of seed light.
Before the 1342nm single-frequency continuous light straight cavity amplification system is used, instrument debugging is firstly carried out, the pump coupler clamping base 9 and the gain medium clamping base 10 are adjusted, so that the seed light and the two beams of pump light are longitudinally overlapped, and the angular positions of the pump coupler clamping base 9 and the gain medium clamping base 10 are fixed.
The light amplification method of the 1342nm single-frequency continuous light straight-cavity amplification system, as shown in fig. 2, includes the following steps:
step 1: after being isolated and shaped by a lens group, seed light emitted by a seed laser 12 is reflected by a first transflective mirror 4 and injected into a gain medium 6;
step 2: the two pump light emitters 13 respectively emit two beams of pump light, and the two beams of pump light are respectively shaped and converged by the first pump coupler 7 and the second pump coupler 8 and then transmitted into the gain medium 6 through the first transflective mirror 4 and the second transflective mirror 5;
and 4, step 4: the amplified light passes through the gain medium 6 and is reflected, collected and utilized by the second transflective mirror 5. The amplified light energy after amplification was 5 watts.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (11)
1. The 1342nm single-frequency continuous light straight-cavity amplifier is characterized by comprising a gain medium (6), a first transparent mirror (4) and a second transparent mirror (5) which are symmetrically arranged on two sides of the gain medium (6) along the same optical axis, wherein a first pump coupler (7) and a second pump coupler (8) are respectively arranged on the outer sides of the first transparent mirror (4) and the second transparent mirror (5), the first transparent mirror (4) reflects seed light, transmits the pump light emitted by the first pump coupler (7) and joins the two, the second transparent mirror (5) transmits the pump light emitted by the second pump coupler (8), the seed light emitted by the first transparent mirror (4) and the two beams of pump light transmitted by the first transparent mirror (4) and the second transparent mirror (5) are longitudinally coincided in the gain medium (6) to be amplified to form amplified light, the second transflective mirror (5) reflects the amplified light output by the gain medium (6).
2. The 1342nm single-frequency continuous optical straight cavity amplifier according to claim 1, further comprising a base (11), wherein said gain medium (6) is disposed in the middle of said base (11) by a gain medium clamping base (10); the first pump coupler (7) and the second pump coupler (8) are symmetrically arranged at two ends of the base (11) through a pump coupler clamping base (9) respectively; the pump coupler clamping base (9) can be adjusted in four dimensions, so that two beams of pump light after being shaped and converged by the first pump coupler (7) and the second pump coupler (8) are longitudinally coincided with the seed light reflected by the reflecting mirror (4) in the gain medium (6).
3. The 1342nm single-frequency continuous light straight cavity amplifier according to claim 1, wherein a pump coupling lens group consisting of a self-focusing lens, a concave mirror and a focusing lens is disposed in the first pump coupler (7) and the second pump coupler (8), and the magnification of the pump coupling lens group is 1 (1-5).
4. The 1342nm single-frequency continuous-light straight cavity amplifier according to claim 3, wherein the ratio of the spot size of the condensed pump light to the spot size of the seed light shaped by the first pump coupler (7) and the second pump coupler (8) is 1: (0.8-1).
5. The 1342nm single-frequency continuous-light straight cavity amplifier according to claim 1, wherein the gain medium (6) is a YVO4-Nd: YVO4 bond and crystal or a YVO4-Nd: YVO4-YVO4 bond and crystal.
6. The 1342nm single-frequency continuous optical straight cavity amplifier according to claim 1, wherein said gain medium (6) is externally coated with a metal heat sink material and a water cooling assembly.
7. The 1342nm single-frequency continuous light straight cavity amplifier of claim 2, wherein the gain medium clamping base (10) is adjustable in two dimensions, front-back and left-right.
8. The 1342nm single-frequency continuous-light straight cavity amplifier according to claim 2, wherein the base (11) comprises an optical platform (11-1) for supporting the first pump coupler (7), the second pump coupler (8), the gain medium (6), the first transflective mirror (4) and the second transflective mirror (5), and a lower cavity (11-2) for mounting auxiliary components.
9. A 1342nm single-frequency continuous light straight cavity amplification system, comprising a seed laser (12) for emitting seed light, a lens set for isolating and shaping the seed light, two pump light emitters (13) for emitting pump light, and the 1342nm single-frequency continuous light straight cavity amplifier of any one of claims 1-8; the lens group is located between the seed laser (12) and the first transflective mirror (4), and the two pump light emitters (13) are respectively located on the outer sides of the first pump coupler (7) and the second pump coupler (8).
10. The 1342nm single frequency continuous light straight cavity magnification system of claim 9, wherein the lens group comprises a shaping lens (2) to shape the seed light, an isolator (1) to isolate the reflected seed light, and a focusing lens (3) to focus the seed light.
11. The 1342nm single-frequency continuous light straight cavity amplification system of claim 9, wherein the pump light emitter (13) is a fiber coupled laser diode laser, the output pump light has a center wavelength of 880nm, a fiber diameter of 400 μm, and a numerical aperture n.a. of 0.22.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113394649A (en) * | 2020-03-13 | 2021-09-14 | 核工业理化工程研究院 | 1342nm single-frequency continuous light straight cavity amplifier, amplifying system and light amplifying method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113394649A (en) * | 2020-03-13 | 2021-09-14 | 核工业理化工程研究院 | 1342nm single-frequency continuous light straight cavity amplifier, amplifying system and light amplifying method thereof |
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