CN201490564U - Passively Q-switched laser capable of selecting repeat frequency - Google Patents
Passively Q-switched laser capable of selecting repeat frequency Download PDFInfo
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- CN201490564U CN201490564U CN2009201936615U CN200920193661U CN201490564U CN 201490564 U CN201490564 U CN 201490564U CN 2009201936615 U CN2009201936615 U CN 2009201936615U CN 200920193661 U CN200920193661 U CN 200920193661U CN 201490564 U CN201490564 U CN 201490564U
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Abstract
The utility model relates to the field of laser, in particular to a passively Q-switched laser. The passively Q-switched laser capable of selecting repeat frequency comprises a passively Q-switched laser whose outgoing light passes through a beam divider, an impulse current controller is placed in a branch light path of the beam divider, and a polarizer, a Faraday rotating piece and a polarization analyzer are arranged in another optical path in turn, the Faraday rotating piece is arranged in a magnetic coil which is coated outside, the impulse current controller and the magnetic coil are connected and combed to be an impulse magnetic filed, and the polarizer, the magnetic coil, the polarization analyzer and the Faraday rotating piece form a magneto-optic switch, and the impulse magnetic field and the magneto-optic switch form an impulse selection optical switch. The passively Q-switched laser adopts the technical scheme to solve the problems that the frequency of a passively Q-switched laser is not easy to modulate, low-frequency passively Q-switched impulse is not easy to obtain, the structure is complex, and electromagnetic interference which is generated is big. The passively Q-switched laser can select repeat frequency through the mode of simple and reasonable structure.
Description
Technical field
The utility model relates to laser field, relates in particular to passive Q-regulaitng laser.
Background technology
General passive Q-adjusted micro-slice laser, between 300ps-900ps, peak power is 100-300KW to its pulsewidth usually, repetition rate at several KHz to tens KHZ.Its shortcoming is not easy-regulating of frequency, and is difficult for obtaining the low frequency Q impulse.
On the other hand, Q-switched laser commonly used adopts the electro-optical Q-switch structure more, and its pulsewidth is many at 5-10ns, complex structure, and it is big to produce electromagnetic interference; If adopt passive Q-adjusted switch, then can obtain more short-pulse laser output.
The utility model content
Therefore, at the problems referred to above, the utility model proposes a solution, the technical solution of the utility model is:
A kind of passive Q-regulaitng laser of selecting repetition rate of the present utility model, comprise: passive Q-adjusted laser seed source, its emergent light is through a beam splitter, in a branch light path of this beam splitter, place the pulse current controller, in another light path, place the polarizer successively, the faraday's revolving fragment and the analyzer of magneto-optical crystal, described faraday's revolving fragment is arranged in its outer field coil of parcel, described pulse current controller links to each other with described field coil and is combined into pulsed magnetic field, the described polarizer, field coil, analyzer and faraday's revolving fragment constitute magneto-optic shutter, and described pulsed magnetic field and described magneto-optic shutter constitute the pulse choice optical switch.
Described passive Q-regulaitng laser, pulse choice optical switch and laser amplifier are set in turn on the light path, described passive Q-regulaitng laser is as seed source, described pulse choice optical switch is as the repetition rate selector, and described laser amplifier is used to amplify pulse laser output.
Described pulse current controller is controlled the anglec of rotation of described faraday's revolving fragment by the pulsed magnetic field size of controlling magnetic field coil.
Described pulse choice optical switch is as obtaining the amplifying laser pulse in the seed source injected pulse laser amplifier.
The described polarizer, field coil, analyzer and faraday's revolving fragment constitute the repetition rate of the switching frequency of magneto-optic shutter greater than passive Q-adjusted laser seed source.
The utility model adopts as above technical scheme, and the frequency that has solved Q-switched laser is easy-regulating not, and is difficult for obtaining low frequency Q impulse and complex structure, produces the big problem of electromagnetic interference.Realize to select the passive Q-regulaitng laser of repetition rate by a kind of simple and reasonable mode.
Description of drawings
Fig. 1 is a concrete structure schematic diagram of the present utility model;
Fig. 2 (a) is the passive Q-regulaitng laser spectrogram;
Fig. 2 (b) is the spectrogram that magneto-optic shutter is selected;
Fig. 3 is the schematic diagram of component structure of the present utility model.
Embodiment
Now with embodiment the utility model is further specified in conjunction with the accompanying drawings.
Consult shown in Figure 1, a kind of passive Q-regulaitng laser of selecting repetition rate of the present utility model, comprise: passive Q-regulaitng laser 101, its emergent light is through a beam splitter 102, in a branch light path of this beam splitter 102, place pulse current controller 103, in another light path, place the polarizer 104 successively, faraday's revolving fragment 107 of magneto-optical crystal and analyzer 106, described faraday's revolving fragment 107 is arranged in its outer field coil 105 of parcel, described pulse current controller 103 links to each other with described field coil 105 and is combined into pulsed magnetic field, the described polarizer 104, field coil 105, analyzer 106 and faraday's revolving fragment 107 constitute magneto-optic shutter, and described pulsed magnetic field and described magneto-optic shutter constitute pulse choice optical switch 10.Described pulse current controller 103 is controlled the anglec of rotation of described faraday's revolving fragment 107 by the pulsed magnetic field size of controlling magnetic field coil 105.
Principle of the present utility model is: the pulse tuning Q laser output that it is f1 that passive Q-regulaitng laser 101 produces a repetition pulse frequency, beam splitter 102 are told a small amount of laser to pulse current controller 103 and measured the repetition rate of this passive Q regulation pulse by pulse current controller 103; According to required repetition rate f2 (being lower than the existing frequency of passive Q-adjusted laser),, realize adjusting to repetition rate by add magnetic field or demagnetizing field pulse at field coil 105.The described polarizer 104, field coil 105, analyzer 106 and faraday's revolving fragment 107 constitute magneto-optic shutter, obtain required repetition rate.
Fig. 2 (a) is the passive Q-regulaitng laser frequency spectrum, the frequency spectrum that Fig. 2 (b) selects for magneto-optic shutter.Faraday's revolving fragment 107 saturable magnetic fields that the high-performance magnetism luminescent crystal is made are very low, generally in 100 Gausses-1000 Gauss, and can produce the switching speed of microsecond magnitude, and passive Q-adjusted micro-slice laser repetition rate are generally several KHz～tens KHz.Obviously the switching frequency of the magneto-optic shutter of the polarizer 104, field coil 105, analyzer 106 and faraday's revolving fragment 107 formations is greater than the repetition rate of passive Q-regulaitng laser 101, so adopt magneto-optic shutter can select to be lower than passive Q-adjusted microplate frequency arbitrarily.
Consult shown in Figure 3ly, described passive Q-regulaitng laser 101, pulse choice optical switch 10 and laser amplifier 20 are set in turn on the light path.The utility model adopts the selector of pulse choice optical switch 10 as passive Q-regulaitng laser 101 repetition rates, and seed source laser injects laser amplifier 20 and obtains the amplifying laser pulse, directly obtains the picosecond high energy pulse, saves Q switching commonly used simultaneously.Passive Q-regulaitng laser 101 can be the passive Q-regulaitng laser of microplate, is generally single longitudinal mode output, and the pulse broadband is the hundreds of psec, peak power can reach hundreds of kilowatt, be comparatively desirable seed source, thereby can obtain the high quality pulses laser, the Nd:YAG laser of special pulse output.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection range of the present utility model.
Claims (2)
1. the passive Q-regulaitng laser that can select repetition rate, it is characterized in that: comprise passive Q-regulaitng laser (101), its emergent light is through a beam splitter (102), in a branch light path of this beam splitter (102), place pulse current controller (103), in another light path, place the polarizer (104) successively, faraday's revolving fragment (107) of magneto-optical crystal and analyzer (106), described faraday's revolving fragment (107) is arranged in its outer field coil (105) of parcel, described pulse current controller (103) links to each other with described field coil (105) and is combined into pulsed magnetic field, the described polarizer (104), field coil (105), analyzer (106) and faraday's revolving fragment (107) constitute magneto-optic shutter, and described pulsed magnetic field and described magneto-optic shutter constitute pulse choice optical switch (10).
2. a kind of passive Q-regulaitng laser according to claim 1, it is characterized in that: described passive Q-regulaitng laser (101), pulse choice optical switch (10) and laser amplifier (20) are set in turn on the light path, described passive Q-regulaitng laser (101) is as seed source, described pulse choice optical switch (10) is as the repetition rate selector, and described laser amplifier (20) is used to amplify pulse laser output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201936615U CN201490564U (en) | 2009-08-26 | 2009-08-26 | Passively Q-switched laser capable of selecting repeat frequency |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201936615U CN201490564U (en) | 2009-08-26 | 2009-08-26 | Passively Q-switched laser capable of selecting repeat frequency |
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| Publication Number | Publication Date |
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| CN201490564U true CN201490564U (en) | 2010-05-26 |
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| CN2009201936615U Expired - Fee Related CN201490564U (en) | 2009-08-26 | 2009-08-26 | Passively Q-switched laser capable of selecting repeat frequency |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013143308A1 (en) * | 2012-03-31 | 2013-10-03 | 京东方科技集团股份有限公司 | Active shutter type 3d eyeglasses and working method thereof |
| CN107482474A (en) * | 2017-09-01 | 2017-12-15 | 中恩光电科技（苏州）有限公司 | A kind of Laser pulse modulator device |
-
2009
- 2009-08-26 CN CN2009201936615U patent/CN201490564U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013143308A1 (en) * | 2012-03-31 | 2013-10-03 | 京东方科技集团股份有限公司 | Active shutter type 3d eyeglasses and working method thereof |
| US9494804B2 (en) | 2012-03-31 | 2016-11-15 | Boe Technology Group Co., Ltd. | Active-shutter 3D glasses and operating method thereof |
| CN107482474A (en) * | 2017-09-01 | 2017-12-15 | 中恩光电科技（苏州）有限公司 | A kind of Laser pulse modulator device |
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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: 20100526 Termination date: 20120826 |