CN108155549A - A kind of long light path alkali metal vapour pond - Google Patents
A kind of long light path alkali metal vapour pond Download PDFInfo
- Publication number
- CN108155549A CN108155549A CN201611098750.2A CN201611098750A CN108155549A CN 108155549 A CN108155549 A CN 108155549A CN 201611098750 A CN201611098750 A CN 201611098750A CN 108155549 A CN108155549 A CN 108155549A
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- CN
- China
- Prior art keywords
- speculum
- container
- alkali metal
- light path
- transparent window
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094084—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light with pump light recycling, i.e. with reinjection of the unused pump light, e.g. by reflectors or circulators
-
- 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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Lasers (AREA)
Abstract
Blue laser has huge application potential in fields such as military, storage, display, communications, and the output of 420 and 421nm blue lasers can be realized by pumping Alkali Metal Rb steam by nanosecond pulse near infrared light.The mentality of designing of the present invention is using the highly reflecting films for plating metal so that pump light is repeatedly turned back in steam pond improves blue laser delivery efficiency, the purpose of shortening steam pond length so as to considerably increase the pumping light path to rubidium steam, and then realize.The design can reduce the volume of optical pumping rubidium steam blue laser system, expand its application range.
Description
Technical field
The present invention is a kind of novel long light path alkali metal vapour pond, it is to utilize the reflecting surface for being coated with high reflectance silverskin
Realize that pump light turns back propagation so as to increase the light path that pump light is contacted with rubidium vapor atomic, and then increase and swash in steam pond
The amplified spontaneous emission of state energy level is sent out, it is final to realize the generation efficiency for improving blue laser, and effectively reduce Laser System
The purpose of volume.Invention design is a kind of efficient blue laser generating means.
Background technology
Blue laser has huge application potential in fields such as military, storage, display, communications.Due to alkali metal original
Sub unique level structure and higher quantum efficiency, vapor medium have the characteristics such as flowing heat dissipation and make it possible in blue light
In the research of laser there is important application, cause extensive concern and the exploration of researcher.
During nanosecond pulse near infrared light pumping Alkali Metal Rb steam generates blue laser, experiment finds to pass through increasing
Add pump light that can effectively improve the amplified spontaneous emission process of excitation level with the contact light path of rubidium steam and then improve blue
The generation efficiency of ray laser, and current alkali metal vapour Laser System mostly using improve heating temperature, increase vapor concentration with
And increasing the method for steam pond body product to improve the generation efficiency of blue laser, this will have increase experiment difficulty and safety is hidden
The problems such as suffering from, improving equipment cost and increase the volume of Laser System.
The thinking that the present invention designs is that the method in alkali metal vapour pond both ends plating high reflecting metal film is utilized to improve pumping
Light path of the light in steam pond promotes the progress of amplified spontaneous emission process, and then improves the generation efficiency of blue laser.
Invention content
The practicability of the present invention is that pump light can utilize the device to realize the long light path pumping to alkali metal vapour atom,
The final generation efficiency for improving blue laser.
Its process is：Pump light is by alkali metal vapour pond to be incident on outgoing transparent window into small inclination angle with pond body
High reflecting metal film on after, the high reflecting metal film of incident transparent window is incident on again by steam pond after reflection
On, so cycle for several times, finally projects outgoing from outgoing transparent window after the reflection of incident transparent window high reflecting metal film and swashs
Light.
The technical solution of the present invention is as follows：
A kind of long light path alkali metal vapour pond, the closed container including being filled with alkali metal vapour inside one；In container
Two ends of left and right are respectively equipped with transparent window, and two end of left and right inside container is respectively equipped with speculum, and pump light is transparent through right end
Window enters container, toward being exported by left end transparent window after interflection between the speculum at two ends of left and right；
Or, transparent window is equipped in the right end of container, two end of left and right inside container is respectively equipped with speculum or in appearance
Left end inside device is equipped with speculum, and pump light enters container through right end transparent window, after the speculum reflection of left end or in
Toward being exported by right end transparent window after interflection between the speculum at two ends of left and right.The speculum is transparent inside container
The region that highly reflecting films are coated on window or container inner wall face is formed.
The highly reflecting films being coated with are to reflectivity T >=95% of pump light, amplified spontaneous emission light and blue laser.Speculum
For plane mirror, speculum is arranged in parallel with transparent window.
The size of speculum can determine that pump light exists according to the light path number in required application conditions and steam pond
The light path number passed through in long light path alkali metal vapour pond is more, and the area of speculum is bigger；The speculum at two ends of left and right should be with institute
The geometric center in long light path alkali metal vapour pond is stated as symmetrical centre, center symmetric setting.
Pump light from transparent window inject and in container, between optical axis and mirror reflection surface into the angle of 90- θ, Yu Rong
Two end of left and right of device back and forth after shoot laser, general 0.1 degree≤θ≤10 degree of value.
Corresponding transparent window is respectively equipped in two end of the left and right of container, the left upper part inside container is equipped with reflection
Mirror is coated with highly reflecting films formation speculum, right end lower part is equipped with speculum or is coated with highly reflecting films formation speculum, pump light
Enter container through right end transparent window, expose on left end speculum, reflexed on right end speculum through left end speculum, light in
It is reciprocal through 0 time or 1 time or more between the reflection of left end speculum and right end speculum, most afterwards after the reflection of right end speculum by left end
Transparent window exports.
Description of the drawings
One of Fig. 1 structure diagrams, device name therein are as follows：
1 incident transparent window
1-1 incidence transparent window highly reflecting films
2 pond bodies
3 outgoing transparent windows
3-1 is emitted transparent window highly reflecting films
Fig. 2 second structural representations, device name therein are as follows：
1 incident transparent window
2 pond bodies
3 outgoing transparent windows
4 speculums
5 speculums
Specific embodiment
For detailed description of the present invention specific work process and application method, with reference to practical situations, this is illustrated
The specific embodiment of invention.
Embodiment pumps rubidium steam light path to improve nanosecond pulse near-infrared laser, high anti-using being coated in the present embodiment
The alkali metal vapour pond of silverskin is penetrated, can realize turn back pumping of the pump light in steam pond.High reflection silverskin is to 778.1nm's
The reflectivity of near-infrared pump light is more than 95%, and to 5.2 μm, the reflectivity of spontaneous amplification radiant light is right more than 97.5%
The reflectivity of 420nm blue lasers has very high reflectivity and very low absorptivity more than 95%, so using plating silverskin
It is particularly suitable for as highly reflecting films.During work, the launch wavelength for adjusting ps pulsed laser and ns pulsed laser is 778.1nm, makes it saturating from incidence
Bright window is injected, with the high reflection silverskin with pond body into small inclination angle directive outgoing transparent window, through being emitted transparent window
High reflection silverskin reflection after, the high reflection silverskin of directive incidence transparent window, then through incidence end high reflection silverskin reflection after from
Transparent window is emitted to project.
Alkali metal vapour pond includes incident window, pond body, exit window three parts.Select good stainless steel processing pond
Body, both ends select the glass of high-transmission rate to distinguish as window using the method for vacuum evaporation in former and later two window inner surfaces
Plate the semicircular silverskin of last layer.Steam pond overall length 50cm, window diameter 30mm.The rubidium of high-purity is filled in steam pond
Steam, steam temperature can be adjusted by the heating furnace of steam pond periphery, and steam pressure is rubidium under Laser System operating temperature
Saturated vapor pressure.
The follow-up light splitting of the embodiment can be used prism or be coated with 778.1nm high reflectances and 420nm high-transmission rate films
Two-phase color mirror with regard to can obtain 420nm blue laser export.
Claims (7)
1. a kind of long light path alkali metal vapour pond, it is characterised in that：Closed container including being filled with alkali metal vapour inside one；
Transparent window is respectively equipped in two end of the left and right of container, two end of left and right inside container is respectively equipped with speculum, pumping
Light enters container through right end transparent window, toward being exported by left end transparent window after interflection between the speculum at two ends of left and right；
Or, transparent window is equipped in the right end of container, two end of left and right inside container is respectively equipped with speculum or in container
The left end in portion is equipped with speculum, and pump light enters container through right end transparent window, after the speculum reflection of left end or in left and right
Toward being exported by right end transparent window after interflection between the speculum at two ends.
2. long light path alkali metal vapour pond according to claim 1, it is characterised in that：The speculum is inside container
Transparent window or container inner wall face on be coated with highly reflecting films region form.
3. long light path alkali metal vapour pond according to claim 2, it is characterised in that：
The highly reflecting films being coated with are to reflectivity T >=95% of pump light, amplified spontaneous emission light and blue laser.
4. long light path alkali metal vapour pond according to claim 1 or 2, it is characterised in that：Speculum is plane mirror,
Speculum is arranged in parallel with transparent window.
5. long light path alkali metal vapour pond according to claim 1, it is characterised in that：The size of speculum can basis
Light path number decision in required application conditions and steam pond, the light path that pump light passes through in long light path alkali metal vapour pond
Number is more, and the area of speculum is bigger；The speculum at two ends of left and right should be with the geometric center in the long light path alkali metal vapour pond
For symmetrical centre, center symmetric setting.
6. long light path alkali metal vapour pond according to claim 1 or 5, it is characterised in that：Pump light is penetrated from transparent window
Enter and in container, between optical axis and mirror reflection surface into the angle of 90- θ, in two end of the left and right of container back and forth after shoot laser,
General 0.1 degree≤θ≤10 degree of value.
7. long light path alkali metal vapour pond according to claim 1, it is characterised in that：
Be respectively equipped with corresponding transparent window in two end of the left and right of container, the left upper part inside container be equipped with speculum or
It is coated with highly reflecting films to form speculum, right end lower part equipped with speculum or be coated with highly reflecting films formation speculum, pump light is through the right side
End transparent window enters container, exposes on left end speculum, is reflexed on right end speculum through left end speculum, light is in left end
It is reciprocal through 0 time or 1 time or more between speculum reflection and right end speculum, it is most transparent by left end after the reflection of right end speculum afterwards
Window exports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611098750.2A CN108155549A (en) | 2016-12-04 | 2016-12-04 | A kind of long light path alkali metal vapour pond |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611098750.2A CN108155549A (en) | 2016-12-04 | 2016-12-04 | A kind of long light path alkali metal vapour pond |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108155549A true CN108155549A (en) | 2018-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611098750.2A Pending CN108155549A (en) | 2016-12-04 | 2016-12-04 | A kind of long light path alkali metal vapour pond |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970795A (en) * | 2018-09-28 | 2020-04-07 | 中国科学院大连化学物理研究所 | Excimer broadband pumping alkali metal laser adopting long optical path structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245171A (en) * | 1979-03-30 | 1981-01-13 | Exxon Research & Engineering Co. | Device for producing high-powered radiation employing stimulated Raman scattering in an off-axis path between a pair of spherical mirrors |
| WO2012138929A1 (en) * | 2011-04-05 | 2012-10-11 | Heller Don | Raman converting laser systems. |
| CN103928823A (en) * | 2014-03-28 | 2014-07-16 | 中国科学院长春光学精密机械与物理研究所 | Intracavity heat pipe type alkali metal steam laser |
-
2016
- 2016-12-04 CN CN201611098750.2A patent/CN108155549A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245171A (en) * | 1979-03-30 | 1981-01-13 | Exxon Research & Engineering Co. | Device for producing high-powered radiation employing stimulated Raman scattering in an off-axis path between a pair of spherical mirrors |
| WO2012138929A1 (en) * | 2011-04-05 | 2012-10-11 | Heller Don | Raman converting laser systems. |
| CN103928823A (en) * | 2014-03-28 | 2014-07-16 | 中国科学院长春光学精密机械与物理研究所 | Intracavity heat pipe type alkali metal steam laser |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970795A (en) * | 2018-09-28 | 2020-04-07 | 中国科学院大连化学物理研究所 | Excimer broadband pumping alkali metal laser adopting long optical path structure |
| CN110970795B (en) * | 2018-09-28 | 2021-06-04 | 中国科学院大连化学物理研究所 | Excimer broadband pumping alkali metal laser adopting long optical path structure |
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Application publication date: 20180612 |
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