CN114361926B - Pulse generation time adjustable passive Q-switched laser - Google Patents
Pulse generation time adjustable passive Q-switched laser Download PDFInfo
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- CN114361926B CN114361926B CN202210007799.1A CN202210007799A CN114361926B CN 114361926 B CN114361926 B CN 114361926B CN 202210007799 A CN202210007799 A CN 202210007799A CN 114361926 B CN114361926 B CN 114361926B
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- 239000013078 crystal Substances 0.000 claims abstract description 29
- 238000005086 pumping Methods 0.000 claims abstract description 25
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 230000008878 coupling Effects 0.000 claims abstract description 21
- 238000010168 coupling process Methods 0.000 claims abstract description 21
- 238000005859 coupling reaction Methods 0.000 claims abstract description 21
- 238000007493 shaping process Methods 0.000 claims abstract description 13
- 238000004061 bleaching Methods 0.000 claims description 9
- 238000004020 luminiscence type Methods 0.000 claims description 8
- 239000010408 film Substances 0.000 claims description 6
- 239000012788 optical film Substances 0.000 claims description 6
- 230000003667 anti-reflective effect Effects 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 1
- 230000010355 oscillation Effects 0.000 description 4
- 239000008710 crystal-8 Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The invention discloses a passive Q-switched laser with adjustable pulse generation time, which comprises a pumping source (1), wherein the pumping source (1) is connected with a pumping source shaping system (2), a first light beam (3) and a second light beam (4) are arranged at the transmitting end of the pumping source shaping system (2), and the first light beam (3) sequentially passes through a first coupling optical system (5), a first laser gain medium (6), a spectroscope (7), a passive Q-switched crystal (8) and a first semi-transparent semi-reflecting mirror (9); the second light beam (4) sequentially passes through the up-down translation type reflecting mirror (10), the first reflecting mirror (11), the second coupling optical system (12), the second laser gain medium (13), the second semi-transparent semi-reflecting mirror (14) and the second reflecting mirror (15), and the emitting end of the second reflecting mirror (15) is matched with the incident end of the spectroscope (7). The invention has the characteristic of being capable of adjusting the pulse generation time.
Description
Technical Field
The invention relates to a passive Q-switched laser, in particular to a passive Q-switched laser with adjustable pulse generation time.
Background
The passive Q-switched laser is a pulse laser which utilizes the nonlinear effect of crystals to switch Q of the laser, and because the Q-switched mechanism adopts the saturation effect of the crystals and does not need a complex external excitation structure, the structure of the passive Q-switched laser is very simple and compact. However, once the production of the existing passive Q-switched laser is completed, the pulse generation time of the existing passive Q-switched laser is not adjustable in a use stage, so that the application of the existing passive Q-switched laser in some fields is limited, and the application range is limited. Therefore, the prior art has the problem that the pulse generation time is not adjustable.
Disclosure of Invention
The invention aims to provide a passive Q-switched laser with adjustable pulse generation time. The invention has the characteristic of being capable of adjusting the pulse generation time.
The technical scheme of the invention is as follows: the passive Q-switched laser with the adjustable pulse generation time comprises a pumping source, wherein the pumping source is connected with a pumping source shaping system, a first light beam and a second light beam are arranged at the transmitting end of the pumping source shaping system, and the first light beam sequentially passes through a first coupling optical system, a first laser gain medium, a spectroscope, a passive Q-switched crystal and a first half-transmitting half-reflecting mirror; the second light beam sequentially passes through the up-down translation type reflecting mirror, the first reflecting mirror, the second coupling optical system, the second laser gain medium, the second semi-transparent semi-reflecting mirror and the second reflecting mirror, and the emitting end of the second reflecting mirror is matched with the incident end of the spectroscope.
In the aforementioned passive Q-switched laser with adjustable pulse generation time, the first light beam is incident to the first laser gain medium via the first coupling optical system to perform pumping luminescence, and the light emitted by the first laser gain medium is incident to the first half mirror via the spectroscope and the passive Q-switched crystal and reflected.
In the aforementioned passive Q-switched laser with adjustable pulse generation time, the second light beam is deflected by the vertical translational mirror and the first mirror, and then is incident to the second laser gain medium through the second coupling optical system to perform pumping luminescence, the light emitted by the second laser gain medium is emitted after passing through the second half mirror, and the emitted laser is incident to the passive Q-switched crystal to perform bleaching after passing through the second mirror and the spectroscope.
In the passive Q-switched laser with adjustable pulse generation time, the intensities of the first light beam and the second light beam are adjusted by adjusting the upper and lower positions of the upper and lower translation type reflecting mirrors, so that the bleaching degree of the second light beam on the passive Q-switched crystal is changed, and the pulse generation time of laser is adjusted.
In the foregoing passive Q-switched laser with adjustable pulse generation time, the incident ends of the first and second laser gain media are coated with films that are anti-reflective to the pump light and totally reflective to the oscillation light, and the exit ends of the first and second laser gain media are coated with optical films that are transmissive to the oscillation light and reflective to the pump light.
In the passive Q-switched laser with adjustable pulse generation time, the spectroscope is a cubic prism with a middle plated with a spectroscope film.
In the aforementioned passive Q-switched laser with adjustable pulse generation time, optical films for anti-reflection of oscillating light are plated at both ends of the passive Q-switched crystal.
In the aforementioned passive Q-switched laser with adjustable pulse generation time, the first half mirror and the second half mirror are output mirrors for oscillating laser.
In the foregoing passive Q-switched laser with adjustable pulse generation time, the first mirror is a planar mirror.
Compared with the prior art, the invention emits the first light beam and the second light beam from the pump source and the pump source shaping system, the first light beam is incident to the first laser gain medium through the first coupling optical system to carry out pumping luminescence, and the light emitted by the first laser gain medium is incident to the first half-mirror after passing through the spectroscope and the passive Q-switched crystal and is reflected; the second light beam is deflected by the up-down translation type reflecting mirror and the first reflecting mirror, then enters the second laser gain medium through the second coupling optical system to carry out pumping luminescence, the light emitted by the second laser gain medium is emitted after passing through the second half-transmission half-reflection mirror, and the emitted laser enters the passive Q-switched crystal to carry out bleaching after passing through the second reflecting mirror and the spectroscope; the passive Q-switched crystal is bleached by the second light beam to a certain extent, so that when the first light beam passes through the passive Q-switched crystal, the passive Q-switched crystal is saturated easily, the output pulse generation time is compressed, and the adjustment of the pulse generation time is realized; and the up-down translation type reflecting mirror can translate up and down, and the intensity between the first light beam and the second light beam is adjusted by translating the up-down translation type reflecting mirror, so that the adjusting proportion is the intensity of the first light beam: the intensity of the second light beam is from 1 to infinity, so that the bleaching degree of the second light beam on the passive Q-switched crystal can be finally changed, and the pulse generation time of the laser can be continuously changed to a certain extent. The invention realizes the variable pulse generation time output of the pulse laser on the premise of ensuring the compact structure of the laser. In summary, the invention has the characteristic of being capable of adjusting the pulse generation time.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The marks in the drawings are: the laser beam splitter comprises a 1-pumping source, a 2-pumping source shaping system, a 3-first light beam, a 4-second light beam, a 5-first coupling optical system, a 6-first laser gain medium, a 7-spectroscope, an 8-passive Q-switched crystal, a 9-first half mirror, a 10-vertical translation type reflecting mirror, an 11-first reflecting mirror, a 12-second coupling optical system, a 13-second laser gain medium, a 14-second half mirror and a 15-second reflecting mirror.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not intended to be limiting.
Examples. The passive Q-switched laser with adjustable pulse generation time is shown in fig. 1, and comprises a pump source 1, wherein the pump source 1 is connected with a pump source shaping system 2, a first light beam 3 and a second light beam 4 are arranged at the transmitting end of the pump source shaping system 2, and the first light beam 3 sequentially passes through a first coupling optical system 5, a first laser gain medium 6, a spectroscope 7, a passive Q-switched crystal 8 and a first half-reflecting mirror 9; the second light beam 4 sequentially passes through the up-down translation type reflecting mirror 10, the first reflecting mirror 11, the second coupling optical system 12, the second laser gain medium 13, the second half-mirror 14 and the second reflecting mirror 15, and the emitting end of the second reflecting mirror 15 is matched with the incident end of the spectroscope 7.
The first light beam is incident to a first laser gain medium through a first coupling optical system to carry out pumping luminescence, and the light emitted by the first laser gain medium is incident to a first half-mirror through a spectroscope and a passive Q-switched crystal and is reflected.
The second light beam is deflected by the up-down translation type reflecting mirror and the first reflecting mirror, then enters the second laser gain medium through the second coupling optical system to carry out pumping luminescence, the light emitted by the second laser gain medium is emitted after passing through the second half-transmission half-reflection mirror, and the emitted laser enters the passive Q-switched crystal to carry out bleaching after passing through the second reflecting mirror and the spectroscope.
The intensity of the first light beam and the second light beam is adjusted by adjusting the upper and lower positions of the upper and lower translation type reflecting mirrors, so that the bleaching degree of the second light beam on the passive Q-switched crystal is changed, and the pulse generation time of laser is adjusted.
The incident ends of the first laser gain medium 6 and the second laser gain medium 13 are plated with films for anti-reflection of pumping light and total reflection of oscillation light, and the emergent ends of the first laser gain medium 6 and the second laser gain medium 13 are plated with optical films for transmission of the oscillation light and reflection of the pumping light.
The beam splitter 7 is a cubic prism with a beam splitting film in the middle, and functions to transmit the first light beam and reflect the second light beam.
Both ends of the passive Q-switched crystal 8 are plated with optical films for anti-reflection of the oscillating light.
The first half-reflecting mirror 9 and the second half-reflecting mirror 14 are output mirrors for oscillating laser.
The first mirror 11 is a planar mirror in order to deflect the second light beam.
Working principle: the light emitted by the pumping source is divided into two beams by the pumping source shaping system and is divided into a first beam and a second beam, the first beam is incident to the first laser gain medium by the coupling optical system and is pumped to emit light, and the emitted light is incident to the first half-mirror after passing through the spectroscope and the passive Q-switched crystal and is reflected.
The second light beam is deflected by the vertical translation type reflecting mirror and the first reflecting mirror, then enters the second laser gain medium through the second coupling optical system, pumps and emits light, emitted light is emitted after passing through the second semi-transparent semi-reflecting mirror, and emitted laser enters the passive Q-switched crystal to bleach after passing through the second reflecting mirror and the spectroscope.
Because the passive Q-switched crystal is bleached by the second light beam to a certain extent, when the first light beam passes through the passive Q-switched crystal, the passive Q-switched crystal is easily saturated, so that the output pulse generation time is compressed, the up-and-down translation type reflecting mirror can translate up and down, and the intensity of the first light beam and the intensity of the second light beam are adjusted by moving the up-and-down translation type reflecting mirror, wherein the adjustment proportion is that the intensity of the first light beam: the intensity of the second light beam is from 1 to infinity, so that the bleaching degree of the second light beam on the passive Q-switched crystal can be finally changed, and the pulse generation time of the laser can be continuously changed to a certain extent.
The pump light source may be a semiconductor laser or other light source;
the shaping optical system can collimate the light beam of the pumping light source, and can shape the divergence angles of different directions to be consistent.
The up-down translation type reflecting mirror is arranged on a track and can be driven by a stepping motor to move up and down, so that the light intensity ratio between the first light beam and the second light beam is continuously changed.
The coupling optical system can converge the light beam to the incident end surface of the laser gain medium.
Claims (8)
1. A passive Q-switched laser with adjustable pulse generation time, characterized in that: the laser beam shaping device comprises a pump source (1), wherein the pump source (1) is connected with a pump source shaping system (2), a first light beam (3) and a second light beam (4) are arranged at the transmitting end of the pump source shaping system (2), and the first light beam (3) sequentially passes through a first coupling optical system (5), a first laser gain medium (6), a spectroscope (7), a passive Q-switched crystal (8) and a first half-transmitting half-reflecting mirror (9); the second light beam (4) sequentially passes through an up-down translation type reflecting mirror (10), a first reflecting mirror (11), a second coupling optical system (12), a second laser gain medium (13), a second semi-transparent semi-reflecting mirror (14) and a second reflecting mirror (15), and the emitting end of the second reflecting mirror (15) is matched with the incident end of the spectroscope (7);
the second light beam is deflected by the up-down translation type reflecting mirror and the first reflecting mirror, then enters the second laser gain medium through the second coupling optical system to carry out pumping luminescence, the light emitted by the second laser gain medium is emitted after passing through the second half-transmission half-reflection mirror, and the emitted laser enters the passive Q-switched crystal to carry out bleaching after passing through the second reflecting mirror and the spectroscope.
2. A pulse generation time tunable passive Q-switched laser as defined in claim 1, wherein: the first light beam is incident to a first laser gain medium through a first coupling optical system to carry out pumping luminescence, and the light emitted by the first laser gain medium is incident to a first half-mirror through a spectroscope and a passive Q-switched crystal and is reflected.
3. A pulse generation time tunable passive Q-switched laser as defined in claim 1, wherein: the intensity of the first light beam and the second light beam is adjusted by adjusting the upper and lower positions of the upper and lower translation type reflecting mirrors, so that the bleaching degree of the second light beam on the passive Q-switched crystal is changed, and the pulse generation time of laser is adjusted.
4. A pulse generation time tunable passive Q-switched laser as defined in claim 1, wherein: the incident ends of the first laser gain medium (6) and the second laser gain medium (13) are plated with films which are anti-reflective to pumping light and totally reflective to oscillating light, and the emergent ends of the first laser gain medium (6) and the second laser gain medium (13) are plated with optical films which are transmissive to the oscillating light and reflective to the pumping light.
5. A pulse generation time tunable passive Q-switched laser as defined in claim 1, wherein: the spectroscope (7) is a cubic prism with a beam splitting film plated in the middle.
6. A pulse generation time tunable passive Q-switched laser as defined in claim 1, wherein: both ends of the passive Q-switched crystal (8) are plated with optical films for enhancing the reflection of the oscillating light.
7. A pulse generation time tunable passive Q-switched laser as defined in claim 1, wherein: the first half-mirror (9) and the second half-mirror (14) are output mirrors for oscillating laser.
8. A pulse generation time tunable passive Q-switched laser as defined in claim 1, wherein: the first mirror (11) is a planar mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210007799.1A CN114361926B (en) | 2022-01-06 | 2022-01-06 | Pulse generation time adjustable passive Q-switched laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210007799.1A CN114361926B (en) | 2022-01-06 | 2022-01-06 | Pulse generation time adjustable passive Q-switched laser |
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| Publication Number | Publication Date |
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| CN114361926A CN114361926A (en) | 2022-04-15 |
| CN114361926B true CN114361926B (en) | 2024-03-19 |
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| CN202210007799.1A Active CN114361926B (en) | 2022-01-06 | 2022-01-06 | Pulse generation time adjustable passive Q-switched laser |
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Citations (4)
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| CN2454952Y (en) * | 2000-12-08 | 2001-10-17 | 中国科学院上海光学精密机械研究所 | Composite laser apparatus capable of different pulse-width pulse |
| CN106058625A (en) * | 2016-05-26 | 2016-10-26 | 四川大学 | Picosecond laser system with self-injection frequency stabilization and pulse amplification functions |
| CN108963741A (en) * | 2018-09-21 | 2018-12-07 | 深圳市杰普特光电股份有限公司 | Bicrystal green (light) laser |
| CN110932075A (en) * | 2019-05-09 | 2020-03-27 | 长春理工大学 | Dual-wavelength pulse pair laser output method and laser |
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| TW528636B (en) * | 2001-05-09 | 2003-04-21 | Electro Scient Ind Inc | Micromachining with high-energy, intra-cavity Q-switched CO2 laser pulses |
| GB2429833A (en) * | 2005-09-02 | 2007-03-07 | Laser Quantum Ltd | Laser cavity |
| US20070268950A1 (en) * | 2006-05-16 | 2007-11-22 | Spinelli Luis A | Low power Q-switched solid-state lasers |
| FR2966292B1 (en) * | 2010-10-18 | 2013-01-18 | Centre Nat Rech Scient | METHOD AND DEVICE FOR LASER EMISSION FOR SPECTROSCOPIC ANALYSIS OF A SAMPLE |
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2022
- 2022-01-06 CN CN202210007799.1A patent/CN114361926B/en active Active
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|---|---|---|---|---|
| CN2454952Y (en) * | 2000-12-08 | 2001-10-17 | 中国科学院上海光学精密机械研究所 | Composite laser apparatus capable of different pulse-width pulse |
| CN106058625A (en) * | 2016-05-26 | 2016-10-26 | 四川大学 | Picosecond laser system with self-injection frequency stabilization and pulse amplification functions |
| CN108963741A (en) * | 2018-09-21 | 2018-12-07 | 深圳市杰普特光电股份有限公司 | Bicrystal green (light) laser |
| CN110932075A (en) * | 2019-05-09 | 2020-03-27 | 长春理工大学 | Dual-wavelength pulse pair laser output method and laser |
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| Title |
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| CN114361926A (en) | 2022-04-15 |
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