CN2271222Y - Double-way pumping nanosecond pulse optical parameter oscillating amplifier - Google Patents
Double-way pumping nanosecond pulse optical parameter oscillating amplifier Download PDFInfo
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- CN2271222Y CN2271222Y CN 96241177 CN96241177U CN2271222Y CN 2271222 Y CN2271222 Y CN 2271222Y CN 96241177 CN96241177 CN 96241177 CN 96241177 U CN96241177 U CN 96241177U CN 2271222 Y CN2271222 Y CN 2271222Y
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Abstract
The utility model relates to a double-way pumping source pulse optical parameter oscillating amplifying device. The utility model aims at overcoming the defect that only the nonlinear optical crystal is pumped in one way in the prior art and improving the efficiency of the parametric conversion; thus, a nonlinear optical crystal which is arranged between two double-color mirrors is provided. The front of one double-color mirror is provided with an output coupling mirror; a broadband fully reflecting mirror is fixed behind the other two-color mirror, and a piece of double-way pumping source pulse optical parameter oscillating amplifying device which is composed of a pump light fully reflecting mirror is arranged in the direction which is vertical to the optical path of the double-color mirror. The utility model has the advantages that the parameter light which is reversely transmitted also benefits; the threshold can be reduced by 40%; the efficiency of the parametric conversion can be enhanced by 30%; the utility model is also good for the realization of the continuous broad tuning.
Description
The utility model relates to a kind of Optical devices, particularly a kind of two directional pump pulsed light parametric oscillation amplifying device.
Utilize the optical parametric effect in the nonlinear optical crystal, develop efficient broad tuning Laser Devices is that one of approach of application prospect is enlivened, has most in the tunable laser field the most always.For realizing broad tuning, must use wideband resonance chamber mirror.In order to press narrow output linewidth, must in resonant cavity, add various dispersing optics elements.The method for pumping of tradition optical parametric oscillation and amplification is that chamber, pump light transmission broadband mirror removes the pumping nonlinear optical crystal.Because pump light power density height, only special dura mater chamber mirror just can bear, and is not destroyed.But special dura mater chamber mirror limited bandwidth can not be realized all band (for example visible waveband) continuous tuning.Thereby in use must change chamber mirror (promptly broad tuning) continuously, very inconvenient.In addition, high-intensity pump light also often destroys the dispersing optics element.For this reason, the someone designed two separate pump light light paths as: document 1, B.C.Johnson et.al.J.Opt.Soc.Am.B/Vol.12 (1995) 2122.Their index path is shown in Fig. 2, pump light is all-trans for the dichroic mirror at 45 to optical axis (4) and (5), see through parameteric light, make pump light only shine nonlinear optical crystal (2), and can not exposure cavity mirror (1), (13) and tuned cell grating (11) and chamber, broadband mirror (12), avoid high-strength light to destroy tuned cell like this and can use general chamber, broadband mirror.But this design brings a critical defect, promptly only there is gain in the parameteric light of propagating on the direction, and dichroic mirror (4) and (5) are big to the loss of parameteric light, cause the threshold value of parametric oscillator to raise, efficient reduces (parametric amplifier has also obviously been reduced amplification coefficient), and has to a certain degree influenced the width of continuous tuning.
The purpose of this utility model is to overcome the shortcoming and defect of above-mentioned prior art, overcome original technology and only nonlinear crystal is carried out unidirectional pumping, just there is gain in the parameteric light to single-phase propagation, parameteric light to reverse propagation (vibration is for propagating back and forth in the chamber) is the present situation of loss on the contrary, thereby provide a kind of two directional pump light path, so that reverse propagation parameteric light also obtains gain, thereby reduce the parameter threshold value and improve the parameter conversion efficiency.The purpose of this utility model is achieved in that
Core of the present utility model with regard to be based on nanosecond pulse pump light (for example the general service pump optical wavelength is about 5-10 nanosecond) and continuously the light path of pump light in the space be hundreds of cm or infinity, and the long space persistence length for the such pump light of cm magnitude (for example 3-20cm) in the chamber of optical parametric oscillation amplifier is long greater than the chamber widely, this just allows to utilize pump light to return design, in the pump light light field of the built-in anti-both direction of attentioning in parametric reasonance chamber, realize the parameteric light that parametric oscillation (amplification) is propagated is back and forth all provided the purpose of gain.In addition, when pump light single passed through nonlinear crystal, because conversion efficiency is not high, residual pump light was still very strong, so the pump light light intensity of returning also is enough to parameteric light in the chamber of reverse propagation is produced big gain.The principle light path is shown in Fig. 1.The utility model is made up of output coupling mirror, broadband total reflective mirror, nonlinear optical crystal, two dichroic mirrors (the pump light that is all-trans, see through parameteric light), pump light total reflective mirror and pump light.Its light channel structure is: settle a pump light total reflective mirror (6) on dichroic mirror (5) next door, light returns from the former road of residual pump light that dichroic mirror (5) reflects, and the light path between dichroic mirror (5), (6) equals the light path between dichroic mirror (5) and the broadband total reflective mirror (10).Dichroic mirror (4) comprises 45 ° or Brewster's angle with (5) installation position on light path for the incidence angle to optical parameter pump light optical axis.The incidence angle of the relative optical parameter pump of two dichroic mirrors installation position on light path light optical axis comprises 45 and Brewster's angle.Used nonlinear crystal can be one, also can be two.Output coupling mirror, nonlinear optical crystal, total reflection chamber, broadband mirror constitute conventional optical parametric oscillator.The broadband chamber mirror (3) that is all-trans can replace with dispersion element and broadband total reflective mirror (10), and its installation position is perpendicular to optical parameter pump light.The broadband chamber mirror (3) that is all-trans can be used grating (11) instead, and settles a broadband total reflective mirror (12) on grating first-order diffraction light direction, settles 0 ° of angle, perhaps settles a broadband total reflective mirror (3) on grating (11) Zero-order diffractive direction.Used nonlinear optical crystal comprises: potassium dihydrogen phosphate KTP, lithium niobate LiNbO3, barium metaborate BBO, three lithium borate LBO, doped with magnesia lithium niobate MgO2:LiNbO3, lithium iodate LiIO3.Pump light comprises: the synchronous pump mode of continuous laser and pulse laser and pulse laser.In the utility model, can also be settling a beam splitter behind the light path lastblock dichroic mirror of this device, make light path divide two-way, dispersion element of one tunnel center fixed and the broadband chamber mirror (being used to press narrow linewidth) that is all-trans settles the broadband chamber mirror that is all-trans to make Compound Cavity in addition on the way.Superiority of the present utility model:
Owing to adopted such scheme, realized two-phase pumping nonlinear optical crystal, make reverse propagation parameteric light also obtain gain, thereby reduced the parameter threshold value and improved the parameter conversion efficiency.And the utility model only increases by a face-pumping light total reflective mirror on the basis of original technology, the angle of setting precision is identical with resonant cavity, and installation position only requires cardinal principle and resonant cavity equivalent optical path, equipment is simple, make very easily, and raising parametric oscillation or amplification effect is obvious, both kept the two isolation technologies of original pump light can not change the advantage that the chamber mirror is realized continuous broad tuning, remedied again and inserted loss in the chamber that original technology causes and increase, threshold value has been raise, the shortcoming that conversion efficiency reduces.Combine with the two isolation technologies of original pump light, can realize practicability efficient (raising the efficiency 30%), continuous broad tuning optical parametric oscillator and amplifier, to reducing narrow linewidth optical parametric oscillator threshold value (40%) obvious effects is arranged especially. is elaborated to the utility model below in conjunction with accompanying drawing and example: Fig. 1. two separate pump light index path Fig. 3 of Double-way pumping nanosecond pulse optical parameter oscillating amplifier principle index path Fig. 2 .B.C.Johnson et al. design. and two directional pump nanosecond pulse principle of device index path Fig. 4. a kind of enforcement illustration Fig. 5 of Double-way pumping nanosecond pulse optical parameter oscillating amplifier. a kind of enforcement illustration Fig. 6 of Double-way pumping nanosecond pulse optical parameter oscillating amplifier. a kind of enforcement illustration Fig. 7 of Double-way pumping nanosecond pulse optical parameter oscillating amplifier. a kind of enforcement illustration Fig. 8 of Double-way pumping nanosecond pulse optical parameter oscillating amplifier. a kind of enforcement illustration drawing of Double-way pumping nanosecond pulse optical parameter oscillating amplifier is described as follows: (1) output coupling mirror (wideband resonance chamber mirror), flashlight or idle light are all-trans; (2) nonlinear optical crystal; (3) the bandwidth chamber mirror that is all-trans is with (1); (4) dichroic mirror, the pump light that is all-trans sees through parameteric light; (5) dichroic mirror is with (4); (6) the pump optical plane mirror that is all-trans; (7) pump light; (8) output parameter light; (9) beam splitter (Compound Cavity is used); (10) dispersion element (or its combination) and the broadband chamber mirror that is all-trans presses narrow parameteric light live width to use; (11) grating; (12) broadband total reflective mirror is with (1); (13) broadband partially reflecting mirror, the output coupling is used; (14) broadband partially reflecting mirror, the input coupling is used;
Embodiment 1: manufacture a two directional pump nanosecond pulse optical parametric oscillation amplifying device by Fig. 3.Output coupling mirror (1), dispersion element and the broadband chamber mirror (10) that is all-trans is formed the vibration chamber, pump light (7) passes through nonlinear optical crystal (2) by the dichroic mirror reflection, be mapped on the pump light total reflective mirror (6) by dichroic mirror (5) reflection then, pump light total reflective mirror (6) is realized reverse pumping with the former road of residual pump light reflected back nonlinear optical crystal (2).Tuned cell in the dispersion element (10) can be prism, grating, etalon, birefringent filter and their combination.Fig. 4 is an example wherein.Tuning manner can use grazing-incidence grating (11), output coupling mirror (1) and broadband total reflective mirror (12) to form vibration.With the Zero-order diffractive of grating as output light.Nonlinear optical crystal comprises: potassium dihydrogen phosphate KTP, lithium niobate, LiNdO3, barium metaborate BBO, three lithium borate LBO, doped with magnesia lithium niobate MgO2:LiNbO3, lithium iodate LilO3.This narrow band light parametric oscillator is when using two directional pump, and the unidirectional pumping of its threshold ratio is hanged down nearly one times, and efficient can improve 30-50%.
Nonlinear optical crystal is in this example: potassium dihydrogen phosphate KTP, lithium niobate, LiNdO3, barium metaborate BBO, three lithium borate LBO, doped with magnesia lithium niobate MgO2:LiNbO3, lithium iodate LilO3.The effect of present embodiment is with embodiment 1.
Embodiment 4, build high-gain two directional pump optical parameter by Fig. 8 and inject amplifier.Be exaggerated seed light and be coupled in the nonlinear optical crystal (2), under the effect of the pump light (7) of coming in, be exaggerated by dichroic mirror (4) coupling by broadband partially reflecting mirror (14).The seed light that is exaggerated is by broadband partially reflecting mirror (3) output.Pump light total reflection mirror (6) is realized two directional pump with the former road of residual pump light reflected back nonlinear optical crystal (2).Its effect is better than unidirectional pumping significantly, and conversion efficiency can improve 30%.
Nonlinear optical crystal is in the present embodiment: potassium dihydrogen phosphate KTP, lithium niobate LiNdO3, barium metaborate BBO, three lithium borate LBO, doped with magnesia lithium niobate MgO2:LiNbO3, lithium iodate LilO3.
Claims (5)
1. two directional pump nanosecond pulse optical parametric oscillation amplifying device that comprises that output coupling mirror (1), nonlinear optical crystal (2), dichroic mirror (4) and (5), broadband completely reflecting mirror (3), pump light (7) are formed, it is characterized in that: settle a pump light total reflective mirror (6) on dichroic mirror (5) next door, light returns from the former road of residual pump light that dichroic mirror (5) reflects, and the light path between dichroic mirror (5), (6) equals the light path between dichroic mirror (5) and the broadband total reflective mirror (10).Dichroic mirror (4) comprises 45 ° or Brewster's angle with (5) installation position on light path for the incidence angle to optical parameter pump light optical axis.
2. by the two directional pump nanosecond pulse optical parametric oscillation amplifying device of the described light path of claim 1, it is characterized in that: the broadband chamber mirror (3) that is all-trans can replace with dispersion element and broadband total reflective mirror (10), and its installation position is perpendicular to optical parameter pump light.
3. by the described two directional pump nanosecond pulse of claim 1 optical parametric oscillation amplifying device, it is characterized in that: the broadband chamber mirror (3) that is all-trans can be used grating (11) instead, and on grating first-order diffraction light direction, settle a broadband total reflective mirror (12), settle 0 ° of angle, perhaps on grating (11) Zero-order diffractive direction, settle a broadband total reflective mirror (3).
4. by the described two directional pump nanosecond pulse of claim 1 optical parametric oscillation amplifying device, it is characterized in that: the broadband chamber mirror (3) that is all-trans can be used beam splitter (9) instead, divide through beam splitter (9) on two optical axis directions of bright dipping, settle a dispersion element (10) on one beam optical path, settle a broadband total reflective mirror (3) on another beam optical path.
5. by the described two directional pump nanosecond pulse of claim 1 optical parametric oscillation amplifying device, it is characterized in that: described nonlinear optical crystal can be one, also can be two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96241177 CN2271222Y (en) | 1996-10-22 | 1996-10-22 | Double-way pumping nanosecond pulse optical parameter oscillating amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96241177 CN2271222Y (en) | 1996-10-22 | 1996-10-22 | Double-way pumping nanosecond pulse optical parameter oscillating amplifier |
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| Publication Number | Publication Date |
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| CN2271222Y true CN2271222Y (en) | 1997-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 96241177 Expired - Fee Related CN2271222Y (en) | 1996-10-22 | 1996-10-22 | Double-way pumping nanosecond pulse optical parameter oscillating amplifier |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1101069C (en) * | 1998-10-19 | 2003-02-05 | 中国科学院西安光学精密机械研究所 | Laser output method without spectrum limitation |
| CN105337146A (en) * | 2015-11-06 | 2016-02-17 | 深圳大学 | High-peak power pulse thulium-doped laser |
| CN106159675A (en) * | 2016-09-18 | 2016-11-23 | 苏州长光华芯光电技术有限公司 | A kind of semiconductor laser external cavity feedback spectrum beam combination device and spectrum beam combination method thereof |
| CN110289541A (en) * | 2019-05-14 | 2019-09-27 | 中国电子科技集团公司第十一研究所 | Slab laser |
-
1996
- 1996-10-22 CN CN 96241177 patent/CN2271222Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1101069C (en) * | 1998-10-19 | 2003-02-05 | 中国科学院西安光学精密机械研究所 | Laser output method without spectrum limitation |
| CN105337146A (en) * | 2015-11-06 | 2016-02-17 | 深圳大学 | High-peak power pulse thulium-doped laser |
| CN105337146B (en) * | 2015-11-06 | 2019-03-15 | 深圳大学 | A kind of high peak power pulse mixes thulium laser |
| CN106159675A (en) * | 2016-09-18 | 2016-11-23 | 苏州长光华芯光电技术有限公司 | A kind of semiconductor laser external cavity feedback spectrum beam combination device and spectrum beam combination method thereof |
| CN110289541A (en) * | 2019-05-14 | 2019-09-27 | 中国电子科技集团公司第十一研究所 | Slab laser |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |