CN201251548Y - Laser femtosecond probe device - Google Patents
Laser femtosecond probe device Download PDFInfo
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- CN201251548Y CN201251548Y CNU2008201512346U CN200820151234U CN201251548Y CN 201251548 Y CN201251548 Y CN 201251548Y CN U2008201512346 U CNU2008201512346 U CN U2008201512346U CN 200820151234 U CN200820151234 U CN 200820151234U CN 201251548 Y CN201251548 Y CN 201251548Y
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Abstract
A laser femtosecond probe device comprises: a beam-splitting sheet is arranged in a main optical path, the beam-splitting sheet can divide incident laser beam into a transmission probe beam and a reflex main beam, and a first convex lens, an aperture, a second convex lens, a frequency doubling crystal, a corner cube mirror and a reflector, which are confocal, are arranged along the probe beam, wherein the first convex lens and the second convex lens are confocal, and the focus length ratio is 5:1, and the aperture is located on the common focus of the first convex lens and the second convex lens, the corner cube mirror is formed by two reflectors which are in 90 degrees, and is fixed on a one-dimensional translation platform whose one movable shaft is parallel to the incident beam, and the reflector is provided with a film which has high transmission for baseband laser and high reflection for frequency doubling probe lights. The laser femtosecond probe device has the characteristics of simple regulation and high output light quality, and can avoid the mutual interference with the main laser.
Description
Technical field
The utility model relates to the detection of ultrafast process, particularly a kind of laser femtosecond probe electro-optical device.
Background technology
Along with the development of the chirped pulse amplification of laser, the output peak power of mesa surface laser obtains greatly to improve, and reaches to clap watts (10
15W) magnitude focuses on power density and can reach 10
22W/cm
2, laser and matter interaction have produced many new phenomenons, understand its mechanism in depth and play crucial effects to understanding these new phenomenons.
Summary of the invention
For the ultrafast process of laser and matter interaction is surveyed, provide a kind of laser femtosecond probe electro-optical device.Probe light and main laser that this device produces are synchronous, and pulsewidth can reach the femtosecond magnitude, has simple in structure and convenience operation.
Technical solution of the present utility model is as follows:
A kind of laser femtosecond probe device, characteristics are that its formation comprises: at main optical path one beam splitting chip is set, this beam splitting chip is divided into the probe beam of transmission and the main beam of reflection with the laser beam of incident, along probe beam the first confocal convex lens are set, aperture, second convex lens, frequency-doubling crystal, corner cube mirror and catoptron, described first convex lens and second convex lens are confocal, its focal distance ratio is 5:1, described aperture is positioned on the public focus of described first convex lens and second convex lens, described right angle reflector is made of two catoptrons that are mutually 90 °, and be fixed on a shifting axle and be parallel on the one dimension translation stage of incident beam, described catoptron has basic frequency laser high thoroughly to the high anti-rete of frequency multiplication probe light.
Described beam splitting chip is a two sides plating deielectric-coating, and the front surface deielectric-coating is 90% to the reflectivity of laser, and the rear surface is 99.7% to the transmitance of laser.
The confocal point of described first convex lens and second convex lens, focus can dwindle and the light beam of outgoing still is directional light beam diameter between two mirrors, and two lens all are the high transmission film of two-sided plating to main laser.
Described frequency-doubling crystal is a lbo crystal, and crystal cuts according to matching angle.
Described right angle reflector is made of two catoptrons that are mutually 90 °, and it is 99% rete that two mirrors all are coated with the frequency doubled light reflectivity.
Described catoptron is coated with the frequency doubled light reflectivity greater than 95%, and to the fundamental frequency light transmission rate greater than 99% rete.
Characteristics of the present utility model are:
1, be used for superpower ultrafast laser field, this method can obtain the probe light of femtosecond magnitude, and the energy detecting material is by the evolutionary process of laser ionization.
2, the radio-frequency component of usage space wave filter energy elimination light beam spatial frequency improves the probe light quality.
3, use double-frequency laser as probe light, can avoid probe light in use to be subjected to the interference (produce and interfere) of main optical path laser.
4, use the method for fundamental frequency probe light to compare with other, because the plasma that frequency multiplication probe light is produced by laser ionization material has bigger penetration depth, this method may detect the more inner structure of multiple plasma.
Description of drawings
The index path of Fig. 1 the utility model laser femtosecond probe electro-optical device.
Fig. 2 is the example application of the utility model laser femtosecond probe electro-optical device in practical laser is practiced shooting.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described further, but should limit protection domain of the present utility model with this.
See also Fig. 1 earlier, the index path of Fig. 1 the utility model laser femtosecond probe electro-optical device.As seen from the figure, the formation of the utility model laser femtosecond probe device comprises: at main optical path beam splitting chip 1 is set, this beam splitting chip 1 is divided into the probe beam of transmission and the main beam of reflection with laser beam, along probe beam the first confocal convex lens 2 are set, aperture 3, second convex lens 4, frequency-doubling crystal 5, corner cube mirror 6 and catoptron 7, described first convex lens 2 and second convex lens 4 are confocal, described aperture 3 is positioned at the public focus of described first convex lens 2 and second convex lens 4, described right angle reflector 6 is made of two catoptrons that are mutually 90 °, and be fixed on a shifting axle and be parallel on the one dimension translation stage of incident beam, described catoptron 7 has basic frequency laser high thoroughly to the high anti-rete of frequency multiplication probe light.Described beam splitting chip 1 is two sides plating deielectric-coating, and the front surface deielectric-coating is 90% to the reflectivity of laser, and the rear surface is 99.7% to the transmitance of laser.Described first convex lens 2 and second convex lens, 4 confocal points, focus is between two mirrors, and its focal distance ratio is 5:1, can dwindle and the light beam of outgoing still is directional light beam diameter, and two lens all are the high transmission film of two-sided plating to main laser.Described frequency-doubling crystal 5 is a lbo crystal, and crystal cuts according to matching angle.Described right angle reflector 6 is made of two catoptrons that are mutually 90 °, and it is 99% rete that two mirrors all are coated with the frequency doubled light reflectivity.Described catoptron 7 is coated with the frequency doubled light reflectivity greater than 95%, and to the fundamental frequency light transmission rate greater than 99% rete.
Referring to Fig. 2, Fig. 2 is the example application of the utility model laser femtosecond probe electro-optical device in practical laser is practiced shooting again.Light beam A is the output beam of fs-laser system, beam splitting chip 1 is divided into main beam C and probe beam B with laser A, light beam B is by the first confocal convex lens 2 and second convex lens 4 bundle that contracts, be placed with aperture 3 on the focus of two lens, carry out frequency multiplication by 5 pairs of light of frequency-doubling crystal then, frequency doubled light is used catoptron 7 elimination basic frequency laser compositions at last through corner cube mirror 6, obtains frequency multiplication probe beam D.
Main beam C interacts with solid target 12 through being focused on by convex lens 11 after three catoptrons 8,9,10.Solid target 12 is rectangular-shaped glass blocks, target surface and four side polishings.Probe light D sees through from the target side, makes target practice main optical path and probe light path synchronous by regulating right angle reflector 6.Target is ionized the plasma of generation and knows from experience absorbing detection laser, forms shade on the probe hot spot, and shade finally is imaged on the CCD15 by convex lens 13, and the 14th, catoptron.
Claims (6)
1, a kind of laser femtosecond probe device, be characterised in that its formation comprises: beam splitting chip (1) is set at main optical path, this beam splitting chip (1) is divided into the probe beam of transmission and the main beam of reflection with laser beam A, along probe beam confocal first convex lens (2) are set, aperture (3), second convex lens (4), frequency-doubling crystal (5), corner cube mirror (6) and catoptron (7), described first convex lens (2) and second convex lens (4) are confocal, its focal distance ratio is 5: 1, described aperture (3) is positioned at the public focus of described first convex lens (2) and second convex lens (4), described right angle reflector (6) is made of two catoptrons that are mutually 90 °, and be fixed on a shifting axle and be parallel on the one dimension translation stage of incident beam, described catoptron (7) has basic frequency laser high thoroughly to the high anti-rete of frequency multiplication probe light.
2, the device of generation high-quality femtosecond probe light according to claim 1 is characterized in that described beam splitting chip (1) is two sides plating deielectric-coating, and the front surface deielectric-coating is 90% to the reflectivity of laser, and the rear surface is 99.7% to the transmitance of laser.
3, laser femtosecond probe device according to claim 1, it is characterized in that described first convex lens (2) and the confocal point of second convex lens (4), focus is between two mirrors, can dwindle and the light beam of outgoing still is directional light beam diameter, two lens all are the high transmission film of two-sided plating to main laser.
4, laser femtosecond probe device according to claim 1 is characterized in that described frequency-doubling crystal (5) is a lbo crystal, and crystal cuts according to matching angle.
5, laser femtosecond probe device according to claim 1 is characterized in that described right angle reflector (6) is made of two catoptrons that are mutually 90 °, and it is 99% rete that two mirrors all are coated with the frequency doubled light reflectivity.
6, laser femtosecond probe device according to claim 1 is characterized in that described catoptron (7) is coated with the frequency doubled light reflectivity greater than 95%, and to the fundamental frequency light transmission rate greater than 99% rete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201512346U CN201251548Y (en) | 2008-07-25 | 2008-07-25 | Laser femtosecond probe device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201512346U CN201251548Y (en) | 2008-07-25 | 2008-07-25 | Laser femtosecond probe device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201251548Y true CN201251548Y (en) | 2009-06-03 |
Family
ID=40747220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201512346U Expired - Fee Related CN201251548Y (en) | 2008-07-25 | 2008-07-25 | Laser femtosecond probe device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201251548Y (en) |
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2008
- 2008-07-25 CN CNU2008201512346U patent/CN201251548Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090603 |