CN105552702A - Laser amplification device with real-time light beam monitoring function - Google Patents
Laser amplification device with real-time light beam monitoring function Download PDFInfo
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- CN105552702A CN105552702A CN201610094750.9A CN201610094750A CN105552702A CN 105552702 A CN105552702 A CN 105552702A CN 201610094750 A CN201610094750 A CN 201610094750A CN 105552702 A CN105552702 A CN 105552702A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/10015—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by monitoring or controlling, e.g. attenuating, the input signal
Abstract
The embodiment of the invention provides a round-trip laser amplification device and a system thereof. The device comprises a first polarization splitting prism, a first half-wave plate, a polarizing film, a Faraday optical rotator, a second half-wave plate, a laser amplifier, a second polarization splitting prism and a reflector, wherein the first polarization splitting prism is used for reflecting the perpendicular line polarized light in the laser, and allowing the horizontal line polarized light in the laser to be transmitted so as to be received by a light beam monitor; the first half-wave plate is used for changing the perpendicular line polarized light into the horizontal line polarized light; the polarizing film is used for allowing the horizontal line polarized light from the first half-wave plate to be transmitted; the Faraday optical rotator is used for rotating the polarization state of the horizontal line polarized light for 45 degrees in a first direction; the second half-wave plate is used for rotating the polarization state of the line polarized light for a predetermined included angle in the first direction; the laser amplifier is used for amplifying the energy of the line polarized light; the second polarization splitting prism is used for reflecting the perpendicular line polarized light, and allowing the horizontal line polarized light to be transmitted so as to be received by a light beam monitor; and the first reflector is used for reflecting the perpendicular line polarized light along the original path. The round-trip laser amplification device has the light beam real-time monitoring function.
Description
Technical field
The present invention relates to field of laser device technology, particularly relate to a kind of round trip laser amplification device and system thereof.
Background technology
In large complicated laser, need to carry out MOPA system to laser, to extract more energy, obtain higher Energy transmission, this is round trip laser amplification device.
Traditional round trip laser amplification device as shown in Figure 1, the laser injected is horizontal linear polarization light, transmissive polarizer 1 to laser amplifier 2, after laser is amplified by laser amplifier 2, export Faraday polarization apparatus 3 to, after Faraday polarization apparatus 3 clockwise (counterclockwise) rotation 45 degree, export the first speculum 4 to, Faraday polarization apparatus 3 is reflected back by the first speculum 4, it is perpendicular linear polarization light that laser is rotated 45 degree by Faraday polarization apparatus 3 clockwise (counterclockwise) again, and export laser amplifier 2 to and again amplified, then export polarizer 1 to, and be polarized device 1 reflection output.
In traditional round trip laser amplification device, lack real-time light beam monitoring function, be difficult to the beam quality ensureing output beam.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of round trip laser amplification device and the system thereof with real-time light beam monitoring function.
The embodiment of the present invention provides a kind of round trip laser amplification device, and this device comprises:
First polarization splitting prism, for receiving the laser of injection, and reflect the perpendicular linear polarization light in this laser, the horizontal linear polarization light in this laser of transmission is to be received by Beam Monitoring device;
/ 1st wave plate, for changing into horizontal linear polarization light by the perpendicular linear polarization light from the first polarization splitting prism;
Polarizer, for the horizontal linear polarization light of transmission from the 1/1st wave plate;
Faraday polarization apparatus, for rotating 45 degree by the horizontal linear polarization polarisation of light state of polarizer outgoing with first direction;
/ 2nd wave plate, the polarization state for the linearly polarized light exported by Faraday polarization apparatus rotates a predetermined angle with first direction;
Laser amplifier, amplifies for the linearly polarized light exported by the 1/2nd wave plate;
Second polarization splitting prism, for the perpendicular linear polarization light in the light that reflects laser amplifier exports, the horizontal linear polarization light in the light that transmission laser amplifier exports is to be received by Beam Monitoring device;
First speculum, for the perpendicular linear polarization Guang Yuan road of the second polarization splitting prism outgoing is reflected back the second polarization splitting prism, to make this linearly polarized light return laser light amplifier and again to be amplified.
The embodiment of the present invention also provides a kind of round trip laser amplifier system, and this system comprises round trip laser amplification device, the first Beam Monitoring device and the second beam detector; Round trip laser amplification device comprises:
First polarization splitting prism, for receiving the laser of injection, and reflects the perpendicular linear polarization light in this laser, horizontal linear polarization light to the first Beam Monitoring device in this laser of transmission;
/ 1st wave plate, for changing into horizontal linear polarization light by the perpendicular linear polarization light from the first polarization splitting prism;
Polarizer, for the horizontal linear polarization light of transmission from the 1/1st wave plate;
Faraday polarization apparatus, for rotating 45 degree by the horizontal linear polarization polarisation of light state of polarizer outgoing with first direction;
/ 2nd wave plate, the polarization state for the linearly polarized light exported by Faraday polarization apparatus rotates a predetermined angle with first direction;
Laser amplifier, amplifies for the linearly polarized light exported by the 1/2nd wave plate;
Second polarization splitting prism, for the perpendicular linear polarization light in the light that reflects laser amplifier exports, horizontal linear polarization light to the second Beam Monitoring device in the light that transmission laser amplifier exports;
First speculum, for the perpendicular linear polarization Guang Yuan road of the second polarization splitting prism outgoing is reflected back the second polarization splitting prism, to make this linearly polarized light return laser light amplifier and again to be amplified.
Wherein, the laser of injection is linearly polarized light, and the angle of the polarization state of this linearly polarized light and perpendicular polarisation state is more than or equal to-1 spends and be less than or equal to 1 degree.
Wherein, this device also comprises: the 1/3rd wave plate, and for receiving the laser of injection, the laser of this injection is linearly polarized light, and the polarization state of this linearly polarized light is changed into and be more than or equal to 0.5 degree with the angle absolute value of perpendicular polarisation state and be less than or equal to 1 degree; First polarization splitting prism receives the laser injected from the 1/3rd wave plate.
Wherein, between the first polarization splitting prism and the 1/1st wave plate, be also provided with the second speculum, the perpendicular linear polarization light that this second speculum is used for the first polarization splitting prism to reflect reflexes to the 1/1st wave plate.
Wherein, polarization state is more than or equal to 44 degree with the predetermined angle that first direction rotates and is less than or equal to 46 degree by the 1/2nd wave plate.
Wherein, the scope of above-mentioned predetermined angle for being more than or equal to 44 degree and being less than or equal to 44.5 degree, and is more than or equal to 45.5 degree and is less than or equal to 46 degree.
Compared with prior art, the embodiment of the present invention comprises following beneficial effect:
In the embodiment of the present invention, laser, before being amplified by laser amplifier, is divided into two parts by the first polarization splitting prism, and a part enters subsequent optical path and amplified by laser amplifier, another part can be received by beam detector, with see incident beam quality OK; Laser is after by laser amplifier one Cheng Fang great, two parts are divided into by the second polarization splitting prism, a part enters subsequent optical path and is again amplified by laser amplifier, and another part can be received by beam detector, to see that whether beam quality is deteriorated after a Cheng Fang great.Therefore, in the round trip laser amplification device of the present embodiment, there is light beam real time monitoring function, the beam quality of output beam can be ensured.
Accompanying drawing explanation
Fig. 1 is the structural representation of round trip laser amplification device in prior art;
Fig. 2 is the structural representation of an embodiment of round trip laser amplification device in the embodiment of the present invention;
Fig. 3 is that incident ray and reflection ray change schematic diagram through the polarization state of polarizer, clockwise Faraday polarization apparatus, the 1/2nd wave plate;
Fig. 4 is that incident ray and reflection ray change schematic diagram through the polarization state of polarizer, counterclockwise Faraday polarization apparatus, the 1/2nd wave plate;
Fig. 5 is the structural representation of another embodiment of round trip laser amplification device in the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and embodiments, the embodiment of the present invention is described in detail.
Embodiment one
Refer to Fig. 2, Fig. 2 is the structural representation of an embodiment of round trip laser amplification device in the embodiment of the present invention.As shown in Figure 2, round trip laser amplification device 100 comprises the first polarization splitting prism (PBS, PolarizationBeamSplitter) 110, second speculum 120, / 1st wave plate 130, polarizer 140, Faraday polarization apparatus the 150, the 1/2nd wave plate 160, laser amplifier 170, second polarization splitting prism 180, first speculum 190.
The laser that first polarization splitting prism 110 injects for receiving external equipment, and the perpendicular linear polarization light reflected in this laser, horizontal linear polarization light in this laser of transmission to be received by Beam Monitoring device, such as, is received by imageing sensor (CCD, Charge-coupledDevice).Particularly, in the present embodiment, perpendicular linear polarization light is through the first polarization splitting prism 110 with 45 degree of angle of reflection to the second speculums 120, and horizontal linear polarization light is transmitted through CCD1 through the first polarization splitting prism 110.
Beam detector is used for monitoring the near field distribution of hot spot, with this beam quality OK, whether beam distribution even.Beam energy needed for beam detector detects only needs on a small quantity, so the laser major part injected should be allowed as far as possible to be reflected to the second speculum 120 by a PBS, most of energy of the laser that therefore should external equipment be allowed as far as possible to inject is perpendicular linear polarization light.Preferably, the laser of injection is linearly polarized light, and the angle of the polarization state of this linearly polarized light and perpendicular polarisation state is more than or equal to-1 spends and be less than or equal to 1 degree.Certainly, when not considering energy loss, the laser no requirement (NR) can injected external equipment, this laser can be the linearly polarized light larger with the angle of perpendicular polarisation state, also can be circularly polarized light or natural daylight etc.
Second speculum 120 reflexes to the 1/1st wave plate 130 for the perpendicular linear polarization light reflected by the first polarization splitting prism 110./ 1st wave plate 130 changes into horizontal linear polarization light for the second speculum 120 being reflected the perpendicular linear polarization light come.
In the present embodiment, the second speculum 120 is provided with between the first polarization splitting prism 110 and the 1/1st wave plate 130, and the perpendicular linear polarization light that the first polarization splitting prism 110 reflects is with 45 degree of incident angles second speculums, that direction in order to make this perpendicular linear polarization light be incident in the 1/1st wave plate 130 is identical with the direction injecting light, to make the fairly simple gracefulness of assembling of whole round trip laser amplification device.In other embodiments, also can require to arrange the incidence angle of perpendicular linear polarization light on the second speculum according to other assembling.Certainly, the second speculum 120 is also omissible, and now, the 1/1st wave plate 130 directly receives the perpendicular linear polarization light from the first polarization splitting prism, and this light is changed into horizontal linear polarization light.
Polarizer 140 for transmission from the horizontal linear polarization light of the 1/1st wave plate 130 to Faraday polarization apparatus 150.Faraday polarization apparatus 150 is for rotating 45 degree by the horizontal linear polarization polarisation of light state of polarizer 140 outgoing with first direction./ 2nd wave plate 160 rotates a predetermined angle for the polarization state of the linearly polarized light exported by Faraday polarization apparatus 150 with first direction, and outgoing is to laser amplifier 170, and first direction is clockwise or counterclockwise.Laser amplifier 170 amplifies for the linearly polarized light exported by the 1/2nd wave plate 160, and outgoing to the second polarization splitting prism 180.
Perpendicular linear polarization light to the first speculum 190 in the light that second polarization splitting prism 180 exports for reflects laser amplifier 170, the horizontal linear polarization light in the light that transmission laser amplifier 170 exports is to be received by Beam Monitoring device.Particularly, in the present embodiment, horizontal linear polarization light is transmitted through CCD2 through the second polarization splitting prism 180.
Beam energy needed for beam detector detects only needs on a small quantity, so the wide part that laser amplifier 170 should be allowed as far as possible to export is reflected to the first speculum 190 by the 2nd PBS, most of energy of the 1/2nd wave plate 160 emergent light therefore should be allowed as far as possible to be perpendicular linear polarization light.So preferably, polarization state is more than or equal to 44 degree with the predetermined angle that first direction rotates and is less than or equal to 46 degree by the 1/2nd wave plate 160, now, the 1/2nd wave plate 160 outgoing is more than or equal to-1 to the polarisation of light state of laser amplifier 170 and the angle of perpendicular polarisation state and spends and be less than or equal to 1 degree.Certainly, when not considering energy loss, the light no requirement (NR) of the 2nd PBS can be exported to laser amplifier 170, can be the linearly polarized light larger with the angle of perpendicular polarisation state, also can be circularly polarized light or natural daylight etc.
Because PBS has certain extinction ratio, even if so polarization state is 45 degree with the predetermined angle that first direction rotates by the 1/2nd wave plate 160, now laser amplifier outgoing is perpendicular linear polarization light to the light of the 2nd PBS, the 2nd PBS also can transmissive portions light splitting to CCD2.
First speculum 190 is 0 degree of speculum, for the perpendicular linear polarization Guang Yuan road of the 2nd PBS outgoing is reflected back the 2nd PBS.The perpendicular linear polarization light being reflected back the 2nd PBS is reflected back laser amplifier 170 through the 2nd PBS, and is again amplified by laser amplifier 170; Again through the 1/2nd wave plate 160, and its polarization state is rotated predetermined angle by the 1/2nd wave plate 160 with second direction, and second direction is contrary with first direction; Then through Faraday polarization apparatus 150, and its polarization state is rotated 45 degree by Faraday polarization apparatus 150 with first direction, and so far, the polarization state of linearly polarized light is perpendicular polarisation state; Finally this linearly polarized light reflects through polarizer 140 and exports.
Above, the light being transmitted through Faraday polarization apparatus 150 from polarizer 140 is horizontal linear polarization light, this linearly polarized light before this as incident ray through Faraday polarization apparatus the 150, the 1/2nd wave plate 160 until the first speculum 190, then this linearly polarized light through first speculum 190 reflect after again as reflection ray through the 1/2nd wave plate 160, Faraday polarization apparatus 150, become perpendicular linear polarization light.In this process, why can there is change like this in polarization state, be due to: Faraday polarization apparatus 150 has a character, (Faraday polarization apparatus has dextrorotation and left-handed the polarization state of incident ray to be turned clockwise 45 °, one be turn clockwise 45 °, another turns 45 ° counterclockwise, herein with citing clockwise); From the reflection ray of the first speculum 190 through Faraday polarization apparatus, Faraday polarization apparatus polarisation of light state will turn 45 ° clockwise.And the polarization state of incident ray is turned predetermined angular (as 45 degree) by the 1/2nd wave plate 160 clockwise; From the reflection ray of the first speculum 190 through the 1/2nd wave plate, polarisation of light state is turned predetermined angular by the 1/2nd wave plate counterclockwise.
For ease of understanding, herein for the 1/2nd wave plate 160, polarization state being rotated 45 degree, providing incident ray and the reflection ray polarization state change schematic diagram through polarizer 140, Faraday polarization apparatus the 150, the 1/2nd wave plate 160.
Refer to Fig. 3, Fig. 3 is that incident ray and reflection ray change schematic diagram through the polarization state of polarizer, clockwise Faraday polarization apparatus, the 1/2nd wave plate.As shown in Figure 3, when Faraday polarization apparatus is clockwise, the polarization state of incident ray is horizontal state of polarization when polarizer, turns clockwise 45 degree, then turns clockwise 45 degree through the 1/2nd wave plate, become perpendicular polarisation state through Faraday polarization apparatus.The polarization state of reflection ray is rotated counterclockwise 45 degree through the 1/2nd wave plate, then turns clockwise 45 degree through Faraday polarization apparatus, becomes perpendicular polarisation state, and is incident on polarizer.
Refer to Fig. 4, Fig. 4 is that incident ray and reflection ray change schematic diagram through the polarization state of polarizer, counterclockwise Faraday polarization apparatus, the 1/2nd wave plate.As shown in Figure 4, when Faraday polarization apparatus is counterclockwise, the polarization state of incident ray is horizontal state of polarization when polarizer, is rotated counterclockwise 45 degree, then is rotated counterclockwise 45 degree through the 1/2nd wave plate, become perpendicular polarisation state through Faraday polarization apparatus.The polarization state of reflection ray turns clockwise 45 degree through the 1/2nd wave plate, then is rotated counterclockwise 45 degree through Faraday polarization apparatus, becomes perpendicular polarisation state, and is incident on polarizer.
In the present embodiment, laser, before being amplified by laser amplifier, is divided into two parts by the first polarization splitting prism, and a part enters subsequent optical path and amplified by laser amplifier, and another part can be received by beam detector, with see incident beam quality OK; Laser is after by laser amplifier one Cheng Fang great, two parts are divided into by the second polarization splitting prism, a part enters subsequent optical path and is again amplified by laser amplifier, and another part can be received by beam detector, to see that whether beam quality is deteriorated after a Cheng Fang great.Therefore, in the round trip laser amplification device of the present embodiment, there is light beam real time monitoring function, the beam quality of output beam can be ensured.
Embodiment two
When the laser that external equipment injects is perpendicular linear polarization state, if the extinction ratio of a PBS is very high, a PBS so may be caused to reflex to the energy of CCD1 very little, and CCD1 cannot clearly monitor.For solving this problem, the embodiment of the present invention also provides following embodiment.
Refer to Fig. 5, Fig. 5 is the structural representation of another embodiment of round trip laser amplification device in the embodiment of the present invention.As shown in Figure 5, round trip laser amplification device 200 comprises the first polarization splitting prism 210, second speculum 220, / 1st wave plate 230, polarizer 240, Faraday polarization apparatus the 250, the 1/2nd wave plate 260, laser amplifier 270, second polarization splitting prism 280, first speculum 290.
The difference part of the present embodiment and embodiment one is, the round trip laser amplification device 200 of the present embodiment also comprises:
/ 3rd wave plate 291, for receiving the laser that external equipment injects, the laser of this injection is linearly polarized light, and the polarization state of this linearly polarized light is changed into and be more than or equal to 0.5 degree with the angle absolute value of perpendicular polarisation state and be less than or equal to 1 degree; First polarization splitting prism 210 receives the laser injected from the 1/3rd wave plate 291.
In the present embodiment, the 1/3rd wave plate is provided with in the light path front end of a PBS, 1 degree is less than or equal to the angle absolute value of perpendicular polarisation state because the polarization state of this linearly polarized light changes into by the 1/3rd wave plate 291, therefore most light of this linearly polarized light can be reflexed to the second speculum by a PBS, the polarization state of this linearly polarized light changes into and is more than or equal to 0.5 degree with the angle absolute value of perpendicular polarisation state by the 1/3rd wave plate 291 simultaneously, even if therefore the extinction ratio of a PBS is very high, also have enough light energies and arrive CCD1, CCD1 can clearly be monitored.
In like manner, preferably, the scope of the predetermined angle that polarization state rotates with first direction by the 1/2nd wave plate 260, for being more than or equal to 44 degree and being less than or equal to 44.5 degree, and is more than or equal to 45.5 degree and is less than or equal to 46 degree.The 2nd PBS280 can be made so the most light from the 1/2nd wave plate to be reflexed to the first speculum 290, even if ensure that the extinction ratio of the 2nd PBS is very high simultaneously, also have enough light energies and arrive CCD2, CCD2 can clearly be monitored.
The present invention also provides a kind of round trip laser amplifier system, and this system comprises round trip laser amplification device, the first Beam Monitoring device and the second beam detector, and this light path debugging apparatus comprises:
First polarization splitting prism, for receiving the laser of injection, and reflects the perpendicular linear polarization light in this laser, horizontal linear polarization light to the first Beam Monitoring device in this laser of transmission;
/ 1st wave plate, for changing into horizontal linear polarization light by the perpendicular linear polarization light from the first polarization splitting prism;
Polarizer, for the horizontal linear polarization light of transmission from the 1/1st wave plate;
Faraday polarization apparatus, for rotating 45 degree by the horizontal linear polarization polarisation of light state of polarizer outgoing with first direction;
/ 2nd wave plate, the polarization state for the linearly polarized light exported by Faraday polarization apparatus rotates a predetermined angle with first direction;
Laser amplifier, amplifies for the linearly polarized light exported by the 1/2nd wave plate;
Second polarization splitting prism, for the perpendicular linear polarization light in the light that reflects laser amplifier exports, horizontal linear polarization light to the second Beam Monitoring device in the light that transmission laser amplifier exports;
First speculum, for the perpendicular linear polarization Guang Yuan road of the second polarization splitting prism outgoing is reflected back the second polarization splitting prism, to make this linearly polarized light return laser light amplifier and again to be amplified.
Round trip laser amplification device in round trip laser amplifier system can have the above-mentioned various setting enumerated or function, does not remake herein and repeats.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (12)
1. a round trip laser amplification device, is characterized in that, comprising:
First polarization splitting prism, for receiving the laser of injection, and reflect the perpendicular linear polarization light in this laser, the horizontal linear polarization light in this laser of transmission is to be received by Beam Monitoring device;
/ 1st wave plate, for changing into horizontal linear polarization light by the perpendicular linear polarization light from the first polarization splitting prism;
Polarizer, for the horizontal linear polarization light of transmission from the 1/1st wave plate;
Faraday polarization apparatus, for rotating 45 degree by the horizontal linear polarization polarisation of light state of described polarizer outgoing with first direction;
/ 2nd wave plate, the polarization state for the linearly polarized light exported by described Faraday polarization apparatus rotates a predetermined angle with first direction;
Laser amplifier, amplifies for the linearly polarized light exported by the 1/2nd wave plate;
Second polarization splitting prism, for reflecting the perpendicular linear polarization light in the light of described laser amplifier output, the horizontal linear polarization light in the light that this laser amplifier of transmission exports is to be received by Beam Monitoring device;
First speculum, for the perpendicular linear polarization Guang Yuan road of the second polarization splitting prism outgoing is reflected back the second polarization splitting prism, returns described laser amplifier to make this linearly polarized light and is again amplified.
2. round trip laser amplification device according to claim 1, is characterized in that, the laser of described injection is linearly polarized light, and the angle of the polarization state of this linearly polarized light and perpendicular polarisation state is more than or equal to-1 spends and be less than or equal to 1 degree.
3. round trip laser amplification device according to claim 1, it is characterized in that, this device also comprises: the 1/3rd wave plate, for receiving the laser of described injection, the laser of this injection is linearly polarized light, and the polarization state of this linearly polarized light is changed into and be more than or equal to 0.5 degree with the angle absolute value of perpendicular polarisation state and be less than or equal to 1 degree;
Described first polarization splitting prism receives the laser of described injection from the 1/3rd wave plate.
4. round trip laser amplification device according to claim 1, it is characterized in that, between described first polarization splitting prism and described 1/1st wave plate, be also provided with the second speculum, this second speculum is used for the perpendicular linear polarization light that described first polarization splitting prism reflects to reflex to the 1/1st wave plate.
5. round trip laser amplification device according to claim 1, is characterized in that, polarization state is more than or equal to 44 degree with the predetermined angle that first direction rotates and is less than or equal to 46 degree by described 1/2nd wave plate.
6. round trip laser amplification device according to claim 5, is characterized in that, the scope of described predetermined angle for being more than or equal to 44 degree and being less than or equal to 44.5 degree, and is more than or equal to 45.5 degree and is less than or equal to 46 degree.
7. a round trip laser amplifier system, is characterized in that, comprising:
Round trip laser amplification device, the first Beam Monitoring device and the second beam detector;
Described round trip laser amplification device comprises:
First polarization splitting prism, for receiving the laser of injection, and reflects the perpendicular linear polarization light in this laser, horizontal linear polarization light to the first Beam Monitoring device in this laser of transmission;
/ 1st wave plate, for changing into horizontal linear polarization light by the perpendicular linear polarization light from the first polarization splitting prism;
Polarizer, for the horizontal linear polarization light of transmission from the 1/1st wave plate;
Faraday polarization apparatus, for rotating 45 degree by the horizontal linear polarization polarisation of light state of described polarizer outgoing with first direction;
/ 2nd wave plate, the polarization state for the linearly polarized light exported by described Faraday polarization apparatus rotates a predetermined angle with first direction;
Laser amplifier, amplifies for the linearly polarized light exported by the 1/2nd wave plate;
Second polarization splitting prism, for reflecting the perpendicular linear polarization light in the light of described laser amplifier output, horizontal linear polarization light to the second Beam Monitoring device in the light that this laser amplifier of transmission exports;
First speculum, for the perpendicular linear polarization Guang Yuan road of the second polarization splitting prism outgoing is reflected back the second polarization splitting prism, returns described laser amplifier to make this linearly polarized light and is again amplified.
8. round trip laser amplifier system according to claim 7, is characterized in that, the laser of described injection is linearly polarized light, and the angle of the polarization state of this linearly polarized light and perpendicular polarisation state is more than or equal to-1 spends and be less than or equal to 1 degree.
9. round trip laser amplifier system according to claim 7, it is characterized in that, described device also comprises: the 1/3rd wave plate, for receiving the laser of described injection, the laser of this injection is linearly polarized light, and the polarization state of this linearly polarized light is changed into and be more than or equal to 0.5 degree with the angle absolute value of perpendicular polarisation state and be less than or equal to 1 degree;
Described first polarization splitting prism receives the laser of described injection from the 1/3rd wave plate.
10. round trip laser amplifier system according to claim 7, it is characterized in that, between described first polarization splitting prism and described 1/1st wave plate, be also provided with the second speculum, this second speculum is used for the perpendicular linear polarization light that described first polarization splitting prism reflects to reflex to the 1/1st wave plate.
11. round trip laser amplifier systems according to claim 7, is characterized in that, polarization state is more than or equal to 44 degree with the predetermined angle that first direction rotates and is less than or equal to 46 degree by described 1/2nd wave plate.
12. round trip laser amplifier systems according to claim 11, is characterized in that, the scope of described predetermined angle for being more than or equal to 44 degree and being less than or equal to 44.5 degree, and is more than or equal to 45.5 degree and is less than or equal to 46 degree.
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| CN111355116A (en) * | 2020-03-18 | 2020-06-30 | 中国工程物理研究院激光聚变研究中心 | System and method for laser energy control |
| CN115051233A (en) * | 2022-08-17 | 2022-09-13 | 中国科学院长春光学精密机械与物理研究所 | Optical path multiplexing laser amplifier |
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