CN106410591A - Self-stabilization passively Q-switched laser - Google Patents
Self-stabilization passively Q-switched laser Download PDFInfo
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- CN106410591A CN106410591A CN201610839265.XA CN201610839265A CN106410591A CN 106410591 A CN106410591 A CN 106410591A CN 201610839265 A CN201610839265 A CN 201610839265A CN 106410591 A CN106410591 A CN 106410591A
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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
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
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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
- H01S3/02—Constructional details
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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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
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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
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention discloses a self-stabilization passively Q-switched laser. The self-stabilization passively Q-switched laser comprises a resonant cavity and a laser pulse feedback device; the resonant cavity is composed of a gain medium, a saturable absorber and an output cavity mirror; the resonant cavity absorbs energy provided by a laser pumping source, and is used for generating and outputting passively Q-switched pulse laser; the laser pulse feedback device is composed of an attenuator, an optical fibre delayer and a total-reflection mirror; and the laser pulse feedback device is used for feeding back the resonant cavity output laser pulse intercepted by a spectroscope to the resonant cavity after delaying the resonant cavity output laser pulse for a certain time and attenuating a certain energy. The self-stabilization passively Q-switched laser disclosed by the invention has the advantages that: the passively Q-switched pulse output by the laser is difficultly influenced by spontaneous radiation noise of the gain medium and pump light intensity fluctuation; and the pulse time interval and the energy stability can be effectively improved.
Description
Technical field
The present invention relates to Q-switched laser technical field, particularly to a kind of self-stabilization passive Q-regulaitng laser.
Background technology
In order to meet the fields such as commercial production, laser medicine, Military Application and basic scientific research to narrow spaces, peak value
The demand of power pulsed laser, Q-regulating technique arises at the historic moment.It passes through to control the fissipation factor (or Q-value) of resonator cavity according to certain
Rule changes, and in the incipient stage of pumping excitation, makes resonator cavity have high loss (low reactance-resistance ratio), make laser instrument have a high threshold and
Laser generation cannot be produced, the energy of injection gradually builds up to higher level.Then when appropriate, make the fissipation factor in chamber
Suddenly reduce (high q-factor), threshold value decreases to reduced levels, and the energy now accumulating will be changed into laser in very short time
Energy, forms narrow spaces, a high-peak power pulsed laser output.
Q-regulating method is generally divided into actively Q-switched and passive Q-adjusted, and passive Q-adjusted is to arrange saturable absorber in intracavity, utilizes
Its saturated absorption periodically controls the loss of resonator to obtain pulse output.When pumping process starts, saturable absorption
Body absorptance is big, and the loss of resonator is larger, and laser instrument cannot set up vibration.With the accumulation of energy in gain media, spontaneous
Radiation gradually strengthens, and when to a certain extent, the absorptance of saturable absorber will be remarkably decreased, and so that gain in laser instrument is more than
Loss, starts to set up laser generation by spontaneous radiation.Increase with the light intensity that vibration brings, the absorption of saturable absorber
Coefficient is decreased obviously further, promotes the increase that laser intensity is swifter and more violent in turn, then creates what laser was constantly strengthened
Avalanche process, forms pulsed laser output.This kind of mode has the characteristics that structure is simple, small volume, pulsewidth are narrower, and it is not
Need high drive source, low cost, reliability and system compatibility higher, can be widely applied to high-precision three-dimensional imaging, ring
The fields such as border detection, microfabrication.
However, for common passive Q-regulaitng laser, because its pulse relies on the change of saturable absorber loss
Produce, be associated with self-strength, and set up from spontaneous radiation, therefore gain media spontaneous emission noise and pump light intensities ripple
Move and easily this process is impacted, and then so that the interval time of laser instrument output pulse and pulse energy is easily shaken, limit
The raising of laser performance, is unfavorable for practical application.
Content of the invention
Present invention solves the technical problem that being：Overcome the deficiencies in the prior art, a kind of pulse regulation and control relying on itself are provided
To improve the passive Q-regulaitng laser of output stability, to solve traditional passive Q-regulaitng laser stability and be easily subject to gain media spontaneous
Radiated noise and the problem of pump light intensities influence of fluctuations.
Technical scheme：A kind of self-stabilization passive Q-regulaitng laser, including laser pumping source, gain media, can satisfy
With absorber, output hysteroscope, spectroscope, attenuator, fiber delay line and completely reflecting mirror；
Gain media, saturable absorber and output hysteroscope from left to right successively common optical axis place constitute resonator cavity, absorb
The energy of laser pumping source output, produces and exports passive Q regulation pulse laser；
Spectroscope surface is coated with the transmittance film layer of corresponding resonator cavity Output of laser wavelength, and spectroscope is defeated by resonator cavity
Go out a part of transmission of laser, and the outfan output as Q-switched laser, another part is intercepted and is reflected towards laser pulse
Ultramagnifier, described laser pulse ultramagnifier is by attenuator, fiber delay line and completely reflecting mirror from left to right common optical axis successively
Place and constitute；A part for the laser of output after pulse ultramagnifier feedback processing can be intercepted and be reflected back resonator cavity simultaneously；
The laser pulse that spectroscope was intercepted and reflected the resonator cavity output coming by laser pulse ultramagnifier postpones a period of time
And after carrying out energy attenuation, then feeding back to resonator cavity via spectroscope, next in resonator cavity exports pulse by spontaneous radiation
Reenter resonator cavity before formation, to replace spontaneous radiation, set up new laser generation on the basis of itself, under formation is new
Outside one passive Q regulation pulse output cavity.
Described laser pumping source is semiconductor laser diode.
Described gain media is solid state gain medium, by energy storage in wherein, swashs for producing and amplifying intracavity vibration
Light；Gain media is coated with the high antireflection film layer for pump light and the high reflection for oscillating laser near the side of pumping source
Film layer, forms cavity mirror.
Described saturable absorber is solid dielectric or liquid medium, for producing passively Q switched laser arteries and veins in resonance intracavity
Punching output.
Output hysteroscope is concave mirror or plane mirror, and the one side towards gain media is coated with the part transmission for oscillating laser
Film layer and the highly transmissive film layer for pump light, for coupling output endovenous laser, and filter and are not absorbed by gain media
Pump light.
Attenuator is made up of one group of neutral-density filter.
Completely reflecting mirror is plane mirror, and the side surface towards fiber delay line is coated with for resonator cavity Output of laser wavelength
High reflection film layer.
Present invention advantage compared with prior art is：This self-stabilization passive Q-regulaitng laser that the present invention provides, humorous
Shake chamber with passive Q-adjusted mode output laser pulse, the mirror that is split intercepts a part and as signal injected pulse ultramagnifier, ECDC
After suitable time delay and energy attenuation, before the next pulse of resonator cavity is formed by spontaneous radiation, reenter resonator cavity,
Replace spontaneous radiation.Resonator cavity will set up new laser generation on the basis of this signal, forms the new next one passive Q-adjusted
Outside pulse output cavity.So move in circles, the pulse train output under a series of laser instrument itself control will be formed.Due to each
Pulse is all to set up on the basis of a upper pulse, forms vibration by a part for a upper pulse as " seed ",
Rather than formed by spontaneous radiation, therefore pulse is difficult to be fluctuated with pump light intensities by gain media spontaneous emission noise and is affected,
Pulse interval and energy stability can be effectively improved.And it is laser instrument itself behavior that this stability improves process,
It is not required to the control device of additional complexity, significantly expanded the range of application of laser instrument.
Brief description
For further illustrating the particular technique content of the present invention, with reference to embodiments and accompanying drawing describe in detail as follows, its
In：
Fig. 1 is a kind of structural representation of present invention self-stabilization passive Q-regulaitng laser.
Specific embodiment
For making the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in further detail.
Fig. 1 shows the structure of self-stabilization passive Q-regulaitng laser proposed by the present invention.As shown in figure 1, this laser instrument bag
Include：Laser pumping source 1, gain media 2, saturable absorber 3, output hysteroscope 4, spectroscope 5, attenuator 6, fiber delay line 7
And completely reflecting mirror 8.
Wherein laser pumping source 1 is located at the side of gain media 2, will meet certain space distribution, specific wavelength pump
Pu light injects gain media, for providing excitation energy to gain media, maintains laser operation, the spectrum of pump light need to be with increasing
The absorption spectrum of beneficial medium matches, to realize preferable absorbance.
Wherein gain media 2, saturable absorber 3 and output hysteroscope 4 are sequentially coaxially positioned in light path, and it is passive to constitute
Q-switched laser resonator cavity.Gain media 2 near the surface of laser pumping source 1 be coated with total reflection film layer for oscillating laser with
And the high antireflection film layer for pump light, using as the completely reflecting mirror of resonator cavity and the input mirror of pump light；Gain media 2 can be inhaled
Receive pump light, and by energy storage in wherein, for producing and amplifying intracavity oscillating laser.Saturable absorber 3 is by have can
The crystal of saturated absorption or liquid are constituted, and its absorptance reduces with the increase of light intensity incident thereon, for
Resonance intracavity produces passively Q switched laser pulse output.Output hysteroscope 4 is concave mirror or plane mirror, towards the one side of gain media
It is coated with the part for oscillating laser and passes through film layer and the highly transmissive film layer for pump light, swash for coupling output intracavity
Light, and filter the pump light not absorbed by gain media.
Wherein attenuator 6, fiber delay line 7 and completely reflecting mirror 8 are sequentially placed in light path, constitute laser pulse feedback
Device.Attenuator 6 is made up of one group of neutral-density filter, by increasing and decreasing optical filter therein, can in proportion transmission be swashed
Light carries out calibration decay, to obtain the laser pulse of energy requirement needed for satisfaction；Fiber delay line is by the light of a Gent measured length
Fine composition, can make output laser pulse obtain specific time delay wherein, time delay is by fiber lengths and light in this light
The light velocity in minute matter determines.Completely reflecting mirror 8 is plane mirror, and the side surface towards fiber delay line 7 is coated with for resonator cavity
The high reflection film layer of Output of laser wavelength, so that laser can reversely export this pulse feedback device.
Described spectroscope 5 surface is coated with the transmittance film layer of corresponding resonator cavity Output of laser wavelength, for by resonance
Chamber exports a part of output laser of laser, another part is intercepted and is reflected towards pulse feedback device；Simultaneously can be anti-by pulse
The part that feedback device exports laser intercepts and is reflected back laserresonator.
In laser operation, with passive Q-adjusted mode output laser pulse, the mirror 5 that is split has intercepted a part to resonator cavity
And as signal injected pulse ultramagnifier, after suitable time delay and energy attenuation, in the next output arteries and veins of resonator cavity
Punching reenters resonator cavity before being formed by spontaneous radiation, replaces spontaneous radiation.Resonator cavity will be set up on the basis of this signal
New laser generation, forms outside new next passive Q regulation pulse output cavity.So move in circles, a series of laser will be formed
Pulse train under device itself controls exports.Because each pulse is to set up on the basis of a upper pulse, by upper
A part for one pulse forms vibration as " seed ", rather than is formed by spontaneous radiation independently of each other, therefore pulse is difficult
Being fluctuated with pump light intensities by gain media spontaneous emission noise is affected, and pulse interval and energy stability can be had
Effect improves.
Above-described specific embodiment, has been carried out to the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be should be understood that the specific embodiment that the foregoing is only the present invention, be not limited to the present invention,
All any modification, equivalent substitution and improvement within the spirit and principles in the present invention, done etc., should be included in the present invention's
Within protection domain.
Claims (7)
1. a kind of self-stabilization passive Q-regulaitng laser it is characterised in that：Including laser pumping source (1), gain media (2), saturable
Absorber (3), output hysteroscope (4), spectroscope (5), attenuator (6), fiber delay line (7) and completely reflecting mirror (8)；
Gain media (2), saturable absorber (3) and output hysteroscope (4) from left to right successively common optical axis place constitute resonator cavity,
Absorb the energy that laser pumping source (1) exports, produce and export passive Q regulation pulse laser；
Spectroscope (5) surface is coated with the transmittance film layer of corresponding resonator cavity Output of laser wavelength, and spectroscope (5) is by resonator cavity
A part of transmission of output laser, and the outfan output as Q-switched laser, another part are intercepted and are reflected towards laser arteries and veins
Rush ultramagnifier, described laser pulse ultramagnifier is by attenuator (6), fiber delay line (7) and completely reflecting mirror (8) from left to right
Common optical axis is placed and is constituted successively；A part for the laser of output after pulse ultramagnifier feedback processing can be intercepted and reflect simultaneously
Return resonator cavity；
The laser pulse that spectroscope (5) was intercepted and reflected the resonator cavity output coming by laser pulse ultramagnifier postpones a period of time simultaneously
After carrying out energy attenuation, then feed back to resonator cavity via spectroscope (5), next in resonator cavity exports pulse by spontaneous radiation
Reenter resonator cavity before formation, to replace spontaneous radiation, set up new laser generation on the basis of itself, under formation is new
Outside one passive Q regulation pulse output cavity.
2. as claimed in claim 1 a kind of self-stabilization passive Q-regulaitng laser it is characterised in that described laser pumping source (1) is
Semiconductor laser diode.
3. as claimed in claim 1 a kind of self-stabilization passive Q-regulaitng laser it is characterised in that described gain media (2) is solid
Body gain media, by energy storage in wherein, for producing and amplifying intracavity oscillating laser；Gain media (2) is near pumping source
Side be coated with for pump light high antireflection film layer and for oscillating laser high reflection film layer, formed resonance cavity reflection
Mirror.
4. as claimed in claim 1 a kind of self-stabilization passive Q-regulaitng laser it is characterised in that described saturable absorber (3)
For solid dielectric or liquid medium, export for producing passively Q switched laser pulse in resonance intracavity.
5. as claimed in claim 1 a kind of self-stabilization passive Q-regulaitng laser it is characterised in that output hysteroscope (4) be concave mirror
Or plane mirror, towards gain media the part that is coated with for oscillating laser of one side pass through film layer and for pump light high thoroughly
Penetrate film layer, for coupling output endovenous laser, and filter the pump light not absorbed by gain media.
6. as claimed in claim 1 a kind of self-stabilization passive Q-regulaitng laser it is characterised in that attenuator (6) is neutral by one group
Density filters form.
7. as claimed in claim 1 a kind of self-stabilization passive Q-regulaitng laser it is characterised in that completely reflecting mirror (8) be plane
Mirror, the side surface towards fiber delay line (7) is coated with the high reflection film layer for resonator cavity Output of laser wavelength.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610839265.XA CN106410591B (en) | 2016-09-21 | 2016-09-21 | Self-stabilizing passive Q-switched laser |
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| CN201610839265.XA CN106410591B (en) | 2016-09-21 | 2016-09-21 | Self-stabilizing passive Q-switched laser |
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| CN106410591A true CN106410591A (en) | 2017-02-15 |
| CN106410591B CN106410591B (en) | 2019-12-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110444999A (en) * | 2019-07-12 | 2019-11-12 | 中国科学院西安光学精密机械研究所 | Laser cooling fluids, laser and Q-regulating method based on stimulated Brillouin scattering |
| CN112247346A (en) * | 2020-10-16 | 2021-01-22 | 北京卓镭激光技术有限公司 | Laser light path alignment device and laser light path alignment method |
| CN112924980A (en) * | 2021-01-23 | 2021-06-08 | 行云智能(深圳)技术有限公司 | Binocular depth-of-field camera ranging method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904154A (en) * | 2012-10-14 | 2013-01-30 | 北京工业大学 | Pulsed laser for improving output polarization property |
| US20130177032A1 (en) * | 2012-01-11 | 2013-07-11 | Martin Berendt | Real time equivalent model, device and apparatus for control of master oscillator power amplifier laser |
| CN204333593U (en) * | 2014-10-13 | 2015-05-13 | 北京光电技术研究所 | Passive Q regulation pulse laser |
-
2016
- 2016-09-21 CN CN201610839265.XA patent/CN106410591B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130177032A1 (en) * | 2012-01-11 | 2013-07-11 | Martin Berendt | Real time equivalent model, device and apparatus for control of master oscillator power amplifier laser |
| CN102904154A (en) * | 2012-10-14 | 2013-01-30 | 北京工业大学 | Pulsed laser for improving output polarization property |
| CN204333593U (en) * | 2014-10-13 | 2015-05-13 | 北京光电技术研究所 | Passive Q regulation pulse laser |
Non-Patent Citations (1)
| Title |
|---|
| 李梦龙等: "《高重频被动调Q固体激光器研究进展》", 《激光与光电子学进展》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110444999A (en) * | 2019-07-12 | 2019-11-12 | 中国科学院西安光学精密机械研究所 | Laser cooling fluids, laser and Q-regulating method based on stimulated Brillouin scattering |
| CN112247346A (en) * | 2020-10-16 | 2021-01-22 | 北京卓镭激光技术有限公司 | Laser light path alignment device and laser light path alignment method |
| CN112924980A (en) * | 2021-01-23 | 2021-06-08 | 行云智能(深圳)技术有限公司 | Binocular depth-of-field camera ranging method |
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| CN106410591B (en) | 2019-12-20 |
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