CN111146679A - Laser sum frequency device - Google Patents
Laser sum frequency device Download PDFInfo
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- CN111146679A CN111146679A CN201911312379.9A CN201911312379A CN111146679A CN 111146679 A CN111146679 A CN 111146679A CN 201911312379 A CN201911312379 A CN 201911312379A CN 111146679 A CN111146679 A CN 111146679A
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- laser
- sum frequency
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- pulse laser
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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
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/109—Frequency multiplication, e.g. harmonic generation
-
- 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
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1123—Q-switching
- H01S3/115—Q-switching using intracavity electro-optic devices
-
- 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
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/0604—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium comprising a non-linear region, e.g. generating harmonics of the laser frequency
-
- 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
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/0615—Q-switching, i.e. in which the quality factor of the optical resonator is rapidly changed
Abstract
The invention discloses a laser sum frequency device, belongs to the field of lasers, and can solve the problem that the sum frequency effect is poor due to the fact that the sum frequency energy is easy to shake caused by the time shake of pulse laser in the existing laser sum frequency device. The device comprises: a first laser unit for generating a first pulse laser; a second laser unit for generating a second pulse laser; the second pulse laser and the first pulse laser have different waveforms; a sum frequency unit, configured to sum frequency of the first pulse laser and the second pulse laser; the first laser unit comprises a laser source and an electro-optical modulator; the electro-optical modulator is used for receiving a laser signal emitted by the laser source and modulating the laser signal into first pulse laser; the device also comprises a control unit which is connected with the electro-optical modulator and used for controlling the working state of the electro-optical modulator so as to enable the pulse width of the first pulse laser to be larger than or equal to the sum of the pulse width of the second pulse laser and the preset delay time. The invention is used for the sum frequency of the laser.
Description
Technical Field
The invention relates to a laser sum frequency device, and belongs to the field of lasers.
Background
At present, the nonlinear frequency conversion technique is one of effective techniques for expanding the wavelength of laser output. The nonlinear frequency conversion technology is a nonlinear frequency conversion technology for generating laser with new frequency through the nonlinear optical effect of an optical medium, such as frequency doubling, sum frequency, optical parametric oscillation and the like.
In practical application, the laser with common wavelength can generate two pulse lasers through the same laser source and then generate sum frequency, but some lasers with special wavelength need to generate two independent pulse lasers through two laser sources and then generate sum frequency. For the sum frequency of two independent pulse lasers, there may be an emission time delay, i.e. a time jitter of the pulse laser, when the two independent laser sources emit the pulse laser, which may cause a sum frequency energy jitter of the two pulse lasers at the sum frequency, so that the sum frequency effect is poor.
Disclosure of Invention
The invention provides a laser sum frequency device, which can solve the problem that the sum frequency energy is easy to shake due to the time shake of pulse laser, so that the sum frequency effect is poor in the conventional laser sum frequency device.
The invention provides a laser sum frequency device, comprising: a first laser unit for generating a first pulse laser; a second laser unit for generating a second pulse laser; the second pulse laser and the first pulse laser have different waveforms; a sum frequency unit for performing sum frequency on the first pulse laser and the second pulse laser; the first laser unit comprises a laser source and an electro-optical modulator; the electro-optical modulator is used for receiving a laser signal emitted by the laser source and modulating the laser signal into the first pulse laser; the device also comprises a control unit, wherein the control unit is connected with the electro-optic modulator and used for controlling the working state of the electro-optic modulator so as to enable the pulse width of the first pulse laser to be larger than or equal to the sum of the pulse width of the second pulse laser and the preset delay time.
Optionally, the first laser unit further includes an amplifying subunit; the amplifying subunit is arranged on an emergent light path of the electro-optical modulator and is used for amplifying a signal of the first pulse laser emitted from the electro-optical modulator; the control unit is electrically connected with the amplifying subunit and is used for controlling the working state of the amplifying subunit.
Optionally, the amplifying sub-unit is a laser amplifier.
Optionally, the control unit is further electrically connected to the second laser unit, and is configured to control a working state of the second laser unit.
Optionally, the sum frequency unit includes a sum frequency crystal group and a beam combining component, where the sum frequency crystal group is used to sum frequency the first pulse laser and the second pulse laser; the beam combination assembly is arranged on an incident light path of the sum frequency crystal group and is used for combining the first pulse laser and the second pulse laser into coaxial laser to be incident into the sum frequency crystal group.
Optionally, the beam combining component includes a dichroic mirror; the dichroic mirror is arranged on an optical path between the second laser unit and the sum frequency crystal group, and is used for transmitting the second pulse laser; the beam combining assembly further comprises a total reflection mirror, and the total reflection mirror is arranged on a light path between the first laser unit and the dichroic mirror; the full-reflecting mirror is used for reflecting the first pulse laser to the dichroic mirror, so that the first pulse laser and the second pulse laser can be combined into coaxial laser after being reflected by the dichroic mirror.
Optionally, a normal of the total reflection mirror forms an angle of 45 ° with an incident light path thereof, and a normal of the dichroic mirror forms an angle of 45 ° with an exit light path of the total reflection mirror.
Optionally, the sum frequency crystal group includes a nonlinear crystal.
Optionally, the first pulse laser is a flat-top waveform pulse laser.
Optionally, the second laser unit is a Q-switched laser.
The invention can produce the beneficial effects that:
according to the laser sum frequency device provided by the invention, the control unit controls the working state of the electro-optical modulator in the first laser unit, so that the pulse width of the first pulse laser modulated by the electro-optical modulator is larger than or equal to the sum of the pulse width of the second pulse laser and the preset delay time, and the pulse widths of the first pulse laser and the second pulse laser can be well matched and sum frequency is ensured. Compared with the prior art, the laser sum frequency device eliminates sum frequency energy jitter caused by time jitter of pulse laser, thereby improving sum frequency effect.
Drawings
Fig. 1 is a schematic structural diagram of a laser sum frequency device according to an embodiment of the present invention;
FIG. 2 is a flat-topped waveform pulsed laser according to an embodiment of the present invention;
fig. 3 is a diagram of a Q-switched pulsed laser according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.
An embodiment of the present invention provides a laser sum frequency apparatus, as shown in fig. 1, the apparatus includes: a first laser unit 1 for generating a first pulse laser; a second laser unit 2 for generating second pulse laser light; the second pulse laser and the first pulse laser have different waveforms; a sum frequency unit 3, configured to sum frequency of the first pulse laser and the second pulse laser; the first laser unit 1 includes a laser light source 11 and an electro-optical modulator 12; the electro-optical modulator 12 is configured to receive a laser signal emitted by the laser source 11, and modulate the laser signal into first pulse laser; the device also comprises a control unit 4, wherein the control unit 4 is connected with the electro-optical modulator 12 and is used for controlling the working state of the electro-optical modulator 12, so that the pulse width of the first pulse laser is larger than or equal to the sum of the pulse width of the second pulse laser and the preset delay time.
The first pulse laser may be a sine-wave pulse laser, a trapezoidal-wave pulse laser, a flat-top-wave pulse laser, or the like, which is not limited in the embodiments of the present invention.
The second pulse laser may be a pulse laser with a sinusoidal waveform, a pulse laser with a trapezoidal waveform, a pulse laser with a flat-top waveform, or the like, which is not limited in the embodiment of the present invention. In practical applications, the waveforms of the first pulse laser and the second pulse laser for sum frequency are generally different.
The first laser unit 1, the second laser unit 2, the sum frequency unit 3, and the control unit 4 have various implementation forms, which are not limited in the embodiment of the present invention. In practical applications, the control unit 4 may be a signal controller.
In practical applications, the laser source 11 may generate a pulsed laser or a continuous laser. When the laser source 11 generates the continuous laser, the laser source 11 may be a laser diode, a solid laser, a fiber laser, etc., which is not limited in the embodiment of the present invention.
The electro-optical modulator 12 is configured to receive a laser signal emitted by the laser source 11, and modulate the laser signal into first pulse laser, specifically, when a voltage is applied to the electro-optical modulator 12, there is laser output; when no voltage is applied to the electro-optical modulator 12, no laser is output; when the applied voltages are different, the shapes of the pulsed lasers are different, thereby realizing the modulation of the continuous laser light generated by the laser light source 11 by the electro-optical modulator 12.
The control unit 4 controls the operating state of the electro-optical modulator 12, and specifically, the control unit 4 controls the time when the electro-optical modulator 12 applies or does not apply voltage.
In practical applications, the preset delay duration is the maximum pulse jitter duration, and is usually measured according to actual conditions.
According to the laser sum frequency device provided by the invention, the control unit controls the working state of the electro-optical modulator in the first laser unit, so that the pulse width of the first pulse laser modulated by the electro-optical modulator is larger than or equal to the sum of the pulse width of the second pulse laser and the preset delay time, and the pulse widths of the first pulse laser and the second pulse laser can be well matched and sum frequency is ensured. Compared with the prior art, the laser sum frequency device eliminates sum frequency energy jitter caused by time jitter of pulse laser, thereby improving sum frequency effect.
Referring to fig. 1, the first laser unit 1 further includes an amplifying sub-unit 13; the amplification subunit 13 is disposed on the emission light path of the electro-optical modulator 12, and is configured to amplify the signal of the first pulse laser emitted from the electro-optical modulator 12; the control unit 4 is electrically connected to the amplification subunit 13 and is configured to control an operating state of the amplification subunit 13.
The amplifying subunit 13 has a plurality of implementation forms, which is not limited in the embodiment of the present invention.
The control unit 4 is configured to control the working state of the amplifying subunit 13, and specifically, the control unit 4 controls the amplifying subunit 13 to amplify the energy of the first pulse laser, so as to obtain the first pulse laser with sufficient energy.
Preferably, the amplifying subunit 13 is a laser amplifier. The laser amplifier may be a fiber laser amplifier, a bulk solid state laser amplifier, or the like, which is not limited in the embodiment of the present invention.
The control unit 4 is also electrically connected with the second laser unit 2, and the control unit 4 is used for controlling the working state of the second laser unit 2. Specifically, the control unit 4 may control the turning on and off of the second laser unit 2, related parameters, and the energy, intensity, etc. of the emitted second pulse laser.
The control unit 4 controls the electro-optical modulator 12 and the second laser unit 2 at the same time, so that the light emitting time of the first pulse laser and the light emitting time of the second pulse laser can be synchronized, the pulse width of the first pulse laser is more accurately controlled to be greater than or equal to the sum of the pulse width of the second pulse laser and the preset delay time, and the energy of the new pulse laser after the sum frequency is more stable.
The sum frequency unit 3 comprises a sum frequency crystal group 31 and a beam combining component, wherein the sum frequency crystal group 31 is used for performing sum frequency on the first pulse laser and the second pulse laser; the beam combining component is disposed on an incident optical path of the sum frequency crystal group 31, and is configured to combine the first pulse laser and the second pulse laser into a coaxial laser to be incident on the sum frequency crystal group 31.
Wherein the sum frequency crystal in the sum frequency crystal group 31 includes a nonlinear crystal, which can be BBO (β -B) according to the wavelength required to be generated by the new laseraB2O4Barium metaborate crystal), LBO (L)iB3O5Lithium triborate crystal), KTP (KT)iOPO4Potassium titanyl phosphate crystal), KDP (KH)2PO4Potassium dihydrogen phosphate crystal), etc., which are not limited in the embodiments of the present invention. The two pulse lasers can generate stable-energy sum frequency pulse lasers in the sum frequency crystal group 31.
And sum frequency crystal set 31 comprises a nonlinear crystal. The number and type of nonlinear crystals included in the sum frequency crystal group 31 are not limited in the embodiment of the present invention.
Due to the arrangement of the beam combination assembly, the first pulse laser and the second pulse laser can be combined into coaxial laser better.
The beam combining assembly includes dichroic mirror 32; dichroic mirror 32 is disposed on the optical path between second laser unit 2 and sum frequency crystal group 31, and dichroic mirror 32 is configured to transmit the second pulse laser light; the beam combining assembly further comprises a total reflection mirror 33, and the total reflection mirror 33 is arranged on a light path between the first laser unit 1 and the dichroic mirror 32; the total reflection mirror 33 is configured to reflect the first pulse laser light onto the dichroic mirror 32, so that the first pulse laser light and the second pulse laser light can be combined into coaxial laser light after being reflected by the dichroic mirror 32.
The dichroic mirror 32 and the total reflection mirror 33 as a beam combining component can realize that the first pulse laser and the second pulse laser are combined coaxially, and the dichroic mirror 32 and the total reflection mirror 33 are made of easily available materials, so that the cost of the device can be reduced.
The normal of the half mirror 33 forms an angle of 45 ° with the incident light path thereof, and the normal of the dichroic mirror 32 forms an angle of 45 ° with the outgoing light path of the half mirror 33. The angle of 45 ° is easy to set, so that the device debugging time can be reduced, and the first pulse laser and the second pulse laser can be quickly combined into a coaxial beam after passing through the dichroic mirror 32, thereby obtaining a high-quality coaxial beam.
Preferably, as shown in fig. 2, the first pulse laser is a flat-top waveform pulse laser, and the new pulse laser energy obtained after the sum frequency can be stabilized.
In practical applications, the second laser unit 2 is a Q-switched laser. The Q-switched laser can generate Q-switched pulse laser with nanosecond pulse width. The Q-switched laser may be one of an electro-optic Q-switched laser, an acousto-optic Q-switched laser, or a Q-switched laser pump, which is not limited in the embodiments of the present invention. Fig. 3 is a schematic diagram of a Q-switched pulsed laser.
Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.
Claims (10)
1. A laser summing apparatus, comprising:
a first laser unit for generating a first pulse laser;
a second laser unit for generating a second pulse laser; the second pulse laser and the first pulse laser have different waveforms;
a sum frequency unit for performing sum frequency on the first pulse laser and the second pulse laser;
the first laser unit comprises a laser source and an electro-optical modulator; the electro-optical modulator is used for receiving a laser signal emitted by the laser source and modulating the laser signal into the first pulse laser;
the device also comprises a control unit, wherein the control unit is connected with the electro-optic modulator and used for controlling the working state of the electro-optic modulator so as to enable the pulse width of the first pulse laser to be larger than or equal to the sum of the pulse width of the second pulse laser and the preset delay time.
2. The laser sum frequency device according to claim 1, wherein the first laser unit further comprises an amplifying sub-unit;
the amplifying subunit is arranged on an emergent light path of the electro-optical modulator and is used for amplifying a signal of the first pulse laser emitted from the electro-optical modulator;
the control unit is electrically connected with the amplifying subunit and is used for controlling the working state of the amplifying subunit.
3. The laser sum frequency device according to claim 2, characterized in that the amplifying sub-unit is a laser amplifier.
4. The laser sum frequency device according to claim 1, wherein the control unit is further electrically connected to the second laser unit for controlling the operating state of the second laser unit.
5. The laser sum frequency device according to claim 1, wherein the sum frequency unit includes a sum frequency crystal group and a beam combining group,
the sum frequency crystal group is used for carrying out sum frequency on the first pulse laser and the second pulse laser;
the beam combination assembly is arranged on an incident light path of the sum frequency crystal group and is used for combining the first pulse laser and the second pulse laser into coaxial laser to be incident into the sum frequency crystal group.
6. The laser sum frequency apparatus of claim 5, wherein the beam combining component includes a dichroic mirror;
the dichroic mirror is arranged on an optical path between the second laser unit and the sum frequency crystal group, and is used for transmitting the second pulse laser;
the beam combining assembly further comprises a total reflection mirror, and the total reflection mirror is arranged on a light path between the first laser unit and the dichroic mirror;
the full-reflecting mirror is used for reflecting the first pulse laser to the dichroic mirror, so that the first pulse laser and the second pulse laser can be combined into coaxial laser after being reflected by the dichroic mirror.
7. The laser sum frequency device according to claim 6, wherein the normal of the total reflection mirror is at an angle of 45 ° with respect to its incident optical path, and the normal of the dichroic mirror is at an angle of 45 ° with respect to its outgoing optical path.
8. The laser sum frequency device according to claim 5, wherein the sum frequency crystal group includes a nonlinear crystal.
9. The laser sum frequency device according to claim 1, characterized in that the first pulsed laser is a flat-top waveform pulsed laser.
10. The laser sum frequency device according to claim 1, characterized in that the second laser unit is a Q-switched laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312379.9A CN111146679A (en) | 2019-12-18 | 2019-12-18 | Laser sum frequency device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312379.9A CN111146679A (en) | 2019-12-18 | 2019-12-18 | Laser sum frequency device |
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| CN111146679A true CN111146679A (en) | 2020-05-12 |
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| CN201911312379.9A Pending CN111146679A (en) | 2019-12-18 | 2019-12-18 | Laser sum frequency device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000275107A (en) * | 1999-03-26 | 2000-10-06 | Kanagawa Acad Of Sci & Technol | Method for measuring laser frequency, method for controlling laser frequency and laser beam generator |
| CN101598882A (en) * | 2008-06-04 | 2009-12-09 | 中国科学院物理研究所 | Device with frequently different ultrashort laser pulses generation laser with new wavelength |
| CN103259156A (en) * | 2012-02-20 | 2013-08-21 | 中国科学院理化技术研究所 | Device for generating pulse sodium beacon lasers of high average-power and high repetition-frequency |
| CN204947312U (en) * | 2015-07-29 | 2016-01-06 | 光越科技(深圳)有限公司 | Based on the adjustable pulse width fiber laser of electrooptic modulator |
| CN208862362U (en) * | 2018-09-18 | 2019-05-14 | 深圳市杰普特光电股份有限公司 | Controllable passive Q-adjusted green (light) laser |
-
2019
- 2019-12-18 CN CN201911312379.9A patent/CN111146679A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000275107A (en) * | 1999-03-26 | 2000-10-06 | Kanagawa Acad Of Sci & Technol | Method for measuring laser frequency, method for controlling laser frequency and laser beam generator |
| CN101598882A (en) * | 2008-06-04 | 2009-12-09 | 中国科学院物理研究所 | Device with frequently different ultrashort laser pulses generation laser with new wavelength |
| CN103259156A (en) * | 2012-02-20 | 2013-08-21 | 中国科学院理化技术研究所 | Device for generating pulse sodium beacon lasers of high average-power and high repetition-frequency |
| CN204947312U (en) * | 2015-07-29 | 2016-01-06 | 光越科技(深圳)有限公司 | Based on the adjustable pulse width fiber laser of electrooptic modulator |
| CN208862362U (en) * | 2018-09-18 | 2019-05-14 | 深圳市杰普特光电股份有限公司 | Controllable passive Q-adjusted green (light) laser |
Non-Patent Citations (1)
| Title |
|---|
| 鲁燕华 等: "15.5W全固态腔外和频589nm黄光激光器", 《中国激光》 * |
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Application publication date: 20200512 |