CN204103240U - A kind of miniaturized continuous wave mid-infrared light parametric oscillator - Google Patents
A kind of miniaturized continuous wave mid-infrared light parametric oscillator Download PDFInfo
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- CN204103240U CN204103240U CN201420413605.9U CN201420413605U CN204103240U CN 204103240 U CN204103240 U CN 204103240U CN 201420413605 U CN201420413605 U CN 201420413605U CN 204103240 U CN204103240 U CN 204103240U
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- yvo
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Abstract
The utility model discloses a kind of miniaturized continuous wave mid-infrared light parametric oscillator, this oscillator comprises laser diode, Nd:YVO
4crystal, MgO:PPLN crystal, a TEC refrigeration platform and the 2nd TEC refrigeration platform, laser diode, Nd:YVO
4crystal, MgO:PPLN crystal are from left to right arranged in order, Nd:YVO
4crystal, MgO:PPLN crystal are non-conterminous in same level, and the described TEC platform that freezes is placed in Nd:YVO
4below crystal, the 2nd described TEC refrigeration platform is placed in below MgO:PPLN crystal; The utility model, by regulating the temperature of MgO:PPLN crystal, realizes the wavelength tuning of mid-infrared laser; And pass through at Nd:YVO
4crystal and the anti-reflection or reflectance coating of MgO:PPLN crystal end-face plating, reduce the required component number of laser, greatly reduce size and the cost of OPO laser system, improve the integrated level of OPO laser system.
Description
Technical field
The utility model belongs to parametric oscillator field, relates to a kind of miniaturized continuous wave mid-infrared light parametric oscillator based on MgO:PPLN crystal.
Background technology
3-5 μm of mid-infrared laser is the window wave band of air, and cover shaking of a large amount of gas molecule and turn spectral line, therefore, the mid-infrared laser of this wave band has important using value and prospect at numerous areas such as space exploration, laser spectroscopy, detection of gas and defence and militaries.Optical parametric oscillator (OPO), as a kind of tunable, high-coherence light source, is a kind of important means obtaining mid-infrared laser output.
For based on OPO laser infrared in quasi-phase matched (QPM) technology, nonlinear crystal conventional at present mainly comprises: ZnGeP
2(ZGP), MgO:PPLN, AgGaSe
2, CdGeAs
2, OP-GaAs etc., wherein MgO:PPLN crystal is because utilizing LiNbO on the one hand
3the maximum second order nonlinear coefficient d of crystal
33, greatly can improve the gain of optical parametric oscillation and reduce its laser pumping threshold value; Pass through at LiNbO on the other hand
3mix certain density MgO in crystal, the threshold value of crystal resisting laser damage can be significantly improved, make this crystal can be applicable to the mid-infrared laser frequency conversion field of high power running.
In infrared OPO laser can be divided into external cavity type and intracavity two kinds from the composition structural point of laser cavity.Compared to external cavity type structure, the feature of intracavity OPO is placed in laserresonator by OPO resonant cavity, its outstanding advantage is to utilize high power density in fundamental frequency light (pump light also known as optical parametric oscillator) chamber to improve the conversion efficiency of optical parametric oscillation, and this structure to the stability in OPO chamber and the power requirement of pump light lower.In recent years, domestic and international multiple seminar constructs infrared OPO in multiple intracavity based on different pumping source or organization plan, and the wide-band tuning obtaining middle infrared laser exports.As, 2013, the people such as Lin Hongyi adopted continuous Nd: YVO
4laser, as pumping source, at room temperature achieves MgO:PPLN crystal quasi-phase matched, obtains continuous inner chamber optical parametric oscillator.By changing the crystal cycle, the wideband adjustable achieving 2.95 ~ 4.16 μm of ideler frequency light and 1.43 ~ 1.66 μm of flashlights exports; In the same year, the people such as Su Hui report and adopt 808nm diode-end-pumped Nd:YVO
4crystal, intracavity pumping cycle polarization MgO:PPLN crystal realizes optical parametric oscillator, obtains continuous broadband tuning laser infrared in 2.249 ~ 3.706 μm export by the temperature changing MgO:PPLN crystal.Although infrared OPO laser all have employed intracavity structure in above-mentioned, the structure of whole parametric oscillation system needs multiple lens and speculum, in infrared parametric oscillation system configuration complicated, cost is high.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, and provide a kind of miniaturized continuous wave mid-infrared light parametric oscillator, this optical parametric oscillator is simple and compact for structure, and without the need to adopting lens and speculum, cost is low.
The utility model adopts following technical scheme:
A kind of miniaturized continuous wave mid-infrared light parametric oscillator, comprising: laser diode, Nd:YVO
4crystal, MgO:PPLN crystal, a TEC refrigeration platform and the 2nd TEC refrigeration platform, laser diode, Nd:YVO
4crystal, MgO:PPLN crystal are from left to right arranged in order, Nd:YVO
4crystal, MgO:PPLN crystal are non-conterminous in same level, and the described TEC platform that freezes is placed in Nd:YVO
4control its temperature below crystal, the 2nd described TEC platform that freezes to be placed in below MgO:PPLN crystal and to control its temperature;
Described laser diode peak power output is 3W, and centre wavelength is 808nm;
Described Nd:YVO
4the left side of crystal is coated with the anti-reflection film of 808nm and high anti-to 1064nm laser, Nd:YVO
4the right side of crystal is coated with the anti-reflection film of 1064nm;
The left side of described MgO:PPLN crystal is coated with the anti-reflection film of 1064nm and high anti-to the laser of 1450nm-1650nm and 3000nm-4000nm, and the right side of MgO:PPLN crystal is coated with the anti-reflection film of laser high-reflecting film to 1064nm, 1450nm-1650nm and 3000nm-4000nm.
The utility model belongs to intracavity single-resonant optical parametric oscillator, by crystal Nd:YVO
4with the anti-reflection or reflectance coating of MgO:PPLN crystal end-face plating, be placed in 1064nm laserresonator, high laser power density in chamber is utilized to reduce the threshold value of OPO, select suitable anti-reflection or reflectance coating, thus improve the conversion efficiency of mid-infrared laser, and reduce the required component number of laser, greatly reduce size and the cost of OPO laser system, improve the integrated level of OPO laser system.
In order to the center line allowing LD be positioned at crystal, laser diode and Nd:YVO
4between crystal, red copper block is preferably set, to regulate height.
As preferably, a described TEC freezes platform courses Nd:YVO
4the temperature of crystal at 27 DEG C, described 2nd TEC freeze platform to be placed in below MgO:PPLN crystal and the temperature of control MgO:PPLN crystal at 20 ~ 180 DEG C.One TEC freezes the temperature of the accurate control Nd:YVO4 crystal of platform, by regulating the temperature of MgO:PPLN crystal to remain in the scope of 20 ~ 180 DEG C, thus can obtain infrared ideler frequency optical wavelength in 3.4246-3.1308 μm.
As preferably, the described long 30mm of MgO:PPLN crystal, wide 10mm, thick 1mm.Preferably, wherein the concentration of MgO is 5%, and the cycle is 30.5 μm.
The utility model adopts above technical scheme, has the following advantages:
1, this device has structure simply, and all solidstate is easy to operation, is convenient to the feature promoted the use of.
2, this device is owing to adopting MgO:PPLN crystal, and utilize the non linear coefficient that it is higher, make optical parameter gain amplifier high, loss is low.
3, oscillate in pumping optical cavity can be realized by this device, and ideler frequency light round trip in resonant cavity can obtain double-pass gain, thus can oscillation threshold be reduced, improve conversion efficiency.
Accompanying drawing explanation
Fig. 1 is a kind of installation drawing of miniaturized continuous wave mid-infrared light parametric oscillator.
Wherein, each digitized representation: 1, a TEC refrigeration platform; 2, the 2nd TEC refrigeration platform; 3, MgO:PPLN crystal; 4, Nd:YVO
4crystal; 5, laser diode; 6, red copper block.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, a kind of miniaturized continuous wave mid-infrared light parametric oscillator, comprising: the laser diode 5 (LD) of red copper block 6,808nm, Nd:YVO
4crystal 4, MgO:PPLN crystal 3, a TEC refrigeration platform 1 and the 2nd TEC refrigeration platform 2, its position relationship is as follows:
A described TEC refrigeration platform 1 is placed in Nd:YVO
4below crystal 4 and control Nd:YVO
4the temperature of crystal 4 is at 27 DEG C.
The described 2nd TEC platform 2 that freezes to be placed in below MgO:PPLN crystal 3 and the temperature (control precision ± 0.1 DEG C) of control MgO:PPLN crystal 3, obtains the tuning operation of multi-wavelength mid-infrared laser.
The top of the one TEC refrigeration platform 1 is provided with red copper block 6, is provided with laser diode 5, laser diode 5, Nd:YVO above red copper block 6
4crystal 4, MgO:PPLN crystal 3 array from left to right.
Described LD peak power output is 3W, and centre wavelength is 808nm.
Described Nd:YVO
4the left side S1 of crystal 4 plates the anti-reflection film of 808nm and to 1064nm laser height instead, its right side S2 then plates the anti-reflection film of 1064nm.
The described long 30mm of MgO:PPLN crystal 3, wide 10mm, thick 1mm, wherein the concentration of MgO is 5%, and the cycle is 30.5 μm.Its left side S3 plates the anti-reflection film of 1064nm in addition, high anti-to the laser of 1450nm-1650nm and 3000nm-4000nm.Right side S4 plates the laser high-reflecting film of 1064nm, 1450nm-1650nm and the anti-reflection film of 3000nm-4000nm.
By the 2nd TEC freeze platform courses MgO:PPLN crystal temperature effect be 20 DEG C time, in the output spectrum figure of infrared ideler frequency light, its crest is positioned at 3.4246 μm of places.When MgO:PPLN crystal temperature effect is 180 DEG C, in the crest of output spectrum figure of infrared ideler frequency light be positioned at 3.1308 μm of places.In infrared ideler frequency light wave peak position move to short wavelength direction along with the rising of MgO:PPLN crystal temperature effect, therefore, we can obtain the tuning operation of infrared ideler frequency light in multi-wavelength by changing MgO:PPLN crystal temperature effect., when crystal temperature effect is increased to 180 DEG C by 20 DEG C, in the tuning range of infrared ideler frequency optical wavelength be 3.4246-3.1308 μm.
The operation principle of miniaturized single resonance intracavity mid-infrared light parametric oscillator described in the utility model is: utilize the LD of 808nm to pass through Nd:YVO
4crystal produces the pump light of laser as OPO of 1064nm, then produces mid-infrared laser output through described MgO:PPLN crystal.By the reflectance coating at the two ends of MgO:PPLN crystal plating flashlight, form infrared OPO laser in the single resonance of flashlight.This device be by the 2nd TEC freeze platform accurately control MgO:PPLN crystal temperature thus to output idle light wave carry out tuning.Need in whole experiment the temperature strictly controlling crystal make tuning not by temperature impact and produce error.
The utility model is by being placed in 1064nm laserresonator by MgO:PPLN crystal, utilize high laser power density in chamber significantly can reduce the threshold value of OPO, and improve the conversion efficiency of mid-infrared laser, can produce tuning range is infrared ideler frequency optical wavelength in 3.4246-3.1308 μm.
Claims (3)
1. a miniaturized continuous wave mid-infrared light parametric oscillator, is characterized in that, comprising: laser diode, Nd:YVO
4crystal, MgO:PPLN crystal, a TEC refrigeration platform and the 2nd TEC refrigeration platform, laser diode, Nd:YVO
4crystal, MgO:PPLN crystal are from left to right arranged in order, Nd:YVO
4crystal, MgO:PPLN crystal are non-conterminous in same level, and the described TEC platform that freezes is placed in Nd:YVO
4below crystal, the 2nd described TEC refrigeration platform is placed in below MgO:PPLN crystal;
Described laser diode peak power output is 3W, and centre wavelength is 808nm;
Described Nd:YVO
4the left side of crystal is coated with the anti-reflection film of 808nm and high anti-to 1064nm laser, Nd:YVO
4the right side of crystal is coated with the anti-reflection film of 1064nm;
The left side of described MgO:PPLN crystal is coated with the anti-reflection film of 1064nm and high anti-to the laser of 1450nm-1650nm and 3000nm-4000nm, and the right side of MgO:PPLN crystal is coated with the anti-reflection film of laser high-reflecting film to 1064nm, 1450nm-1650nm and 3000nm-4000nm.
2. miniaturized continuous wave mid-infrared light parametric oscillator according to claim 1, is characterized in that, the described long 30mm of MgO:PPLN crystal, wide 10mm, thick 1mm.
3. miniaturized continuous wave mid-infrared light parametric oscillator according to claim 1, is characterized in that, laser diode and Nd:YVO
4red copper block is provided with between crystal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420413605.9U CN204103240U (en) | 2014-07-24 | 2014-07-24 | A kind of miniaturized continuous wave mid-infrared light parametric oscillator |
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|---|---|---|---|
| CN201420413605.9U CN204103240U (en) | 2014-07-24 | 2014-07-24 | A kind of miniaturized continuous wave mid-infrared light parametric oscillator |
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| CN204103240U true CN204103240U (en) | 2015-01-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779516A (en) * | 2015-04-20 | 2015-07-15 | 中国科学院上海光学精密机械研究所 | Intermediate infrared single-frequency optical parametric oscillator |
-
2014
- 2014-07-24 CN CN201420413605.9U patent/CN204103240U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779516A (en) * | 2015-04-20 | 2015-07-15 | 中国科学院上海光学精密机械研究所 | Intermediate infrared single-frequency optical parametric oscillator |
| CN104779516B (en) * | 2015-04-20 | 2017-09-12 | 中国科学院上海光学精密机械研究所 | In infrared single-frequency optical parametric oscillator |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20160724 |
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| CF01 | Termination of patent right due to non-payment of annual fee |