CN203119288U - Multi-wavelength mid infrared laser generating device based on PPLN (Periodically Poled Lithium Niobate) - Google Patents
Multi-wavelength mid infrared laser generating device based on PPLN (Periodically Poled Lithium Niobate) Download PDFInfo
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- CN203119288U CN203119288U CN 201320063156 CN201320063156U CN203119288U CN 203119288 U CN203119288 U CN 203119288U CN 201320063156 CN201320063156 CN 201320063156 CN 201320063156 U CN201320063156 U CN 201320063156U CN 203119288 U CN203119288 U CN 203119288U
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Abstract
The utility model discloses a multi-wavelength mid infrared laser generating device based on PPLN, belonging the field of laser technology. The multi-wavelength mid infrared laser generating device based on PPLN comprises a pump source generator, a signal source generator, a wavelength division multiplexer, a first focusing lens, a PPLN crystal, a second focusing lens and a filter plate. Under the condition that signal light output wavelength is determined, it is only required to carry out segmental temperature control on the PPLN crystal to realize large-range tuning output of multi-wavelength laser; and thus, segmental crystal temperatures can be flexibly arranged according to practical requirements so that wavelengths of mid infrared lasers are positioned in target spectral line positions, thereby overcoming the disadvantage that in the prior art, mid infrared wavelengths cannot be tuned in large scale.
Description
Technical field
The utility model discloses multi-wavelength mid-infrared laser generating means and control method thereof based on PPLN, belong to laser technology field.
Background technology
Mid-infrared laser has in fields such as optical sensing, detection and spectrum analyses widely to be used.Studies show that many important gas molecules are (as CH
4, C
2H
4, CO, NH
3, NO
x, SO
xDeng) exist strong base band to absorb in 3-5 micron middle-infrared band, its absorption intensity ratio is at the high 2-3 of a near infrared band order of magnitude.Because this type of base band absorbs the intrinsic fluorescent property that can reflect gas, has fingerprint characteristic, therefore, can realize the high sensitivity detection of information such as gaseous species, concentration having extremely important application in the environmental monitoring field based on the absorption spectrum technology of mid-infrared laser.Based on infrared DFG(Difference Frequency Generation in the crystal second order nonlinear effect, difference frequency produces) LASER Light Source, because its simple in structure, tuning convenience, room temperature running and do not have good characteristic such as threshold value restriction have been subjected to extensive concern.Particularly, along with proposition and the utilization of crystal extra electric field polarization method, based on QPM(Quasi Phase Matching, accurate phase matched) technology in infrared DFG light source obtained develop rapidly, become current gaseous spectrum and detected the main stream light sources of using.In recent years, for satisfying the synchronous detection demand of multicomponent gas or many characteristic spectral lines of one-component, how to make the DFG light source realize in the output synchronously of infrared multiwavelength laser caused widely and paid close attention to.
According to structure and the principle of DFG light source, realize that the multi-wavelength mid-infrared laser exports synchronously, its key is the QPM tuning curve that design has multi-peaks structure.Through effort for many years, people have proposed several different methods to obtain the QPM curve of multi-peaks structure, as PRS(Phase Inversion Sequence, phasing back sequence) technology, ASO(Aperiodic Optical Superlattices, aperiodic optical superlattice) technology,
Sinusoidal phase modulation and Continuous Phase Modulation technology etc.Yet these methods mainly are devoted to the novel crystal domain structure of design and optimization, have that manufacture difficulty is big, cost is high and QPM tuning curve shape to the making error of device problem such as sensitivity comparatively.Moreover, in case after this type of device crystal domain structure was determined, the position at QPM peak (also being the mid-infrared laser wavelength) be respective fixation thereupon, is difficult to tuning on a large scale.
The utility model content
Technical problem to be solved in the utility model is the deficiency at the above-mentioned background technology, and multi-wavelength mid-infrared laser generating means and control method thereof based on PPLN are provided.
The utility model is for realizing that above-mentioned utility model purpose adopts following technical scheme:
Multi-wavelength mid-infrared laser generating means based on PPLN comprises: wave band is the pumping source generator of 1060nm, signal source generator, wavelength division multiplexer, first condenser lens, PPLN crystal, second condenser lens, the filter plate that wave band is 1550nm; Wherein:
Described wave band is that the pumping source generator output optical fibre of 1060nm, the signal source generator output optical fibre that wave band is 1550nm connect wavelength division multiplexer respectively;
Be disposed with first condenser lens, PPLN crystal, second condenser lens, filter plate on the described wavelength division multiplexer output light path.
In the described multi-wavelength mid-infrared laser generating means based on PPLN, wave band is that the pumping source generator of 1060nm comprises: 2N 1060nm band laser, first fiber amplifier, the array waveguide grating that array arranges, and N is natural number, wherein:
Described array waveguide grating is arranged on the 1060nm band laser output light path;
Described first fiber amplifier is arranged on after the array waveguide grating.
In the described multi-wavelength mid-infrared laser generating means based on PPLN, wave band is that the signal source generator of 1550nm comprises: 1550nm band laser, second fiber amplifier, wherein:
Described second fiber amplifier is arranged on after the 1550nm band laser.
In the described multi-wavelength mid-infrared laser generating means based on PPLN, the 1060nm band laser is the LD laser of 1060nm wave band, the LD laser that described 1550nm band laser is the 1550nm wave band..
The utility model adopts technique scheme, has following beneficial effect: under the situation of determining the flashlight output wavelength, only needing the PPLN crystal is implemented the control of segmentation temperature is the tuning output on a large scale that cocoa is realized multiwavelength laser.Utilize this characteristic, can the segmentation crystal temperature effect be set flexibly so that the mid-infrared laser wavelength is in the target position of spectral line according to the practical application needs, overcome can't be the on a large scale tuning inferior position of existing method middle infrared wavelength.
Description of drawings
Fig. 1 is the schematic diagram of the multi-wavelength mid-infrared laser generating means based on PPLN described in the utility model.Number in the figure explanation: 1, wave band is the pumping source generator of 1060nm, 11, the 1060nm band laser, and 12, first fiber amplifier, 13, array waveguide grating, 2, wave band is the signal source generator of 1550nm, 21, the 1550nm band laser, 22, second fiber amplifier, 3, wavelength division multiplexer, 4, first condenser lens, 5, PPLN crystal, 6, second condenser lens, 7, filter plate, 8, Po Er pastes, 9, temperature controller, 10, FTIS.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to utility model.
As shown in Figure 1, the multi-wavelength mid-infrared laser generating means based on PPLN comprises: wave band is the pumping source generator 1 of 1060nm, signal source generator 2, wavelength division multiplexer 3, first condenser lens 4, PPLN crystal 5, second condenser lens 6, the filter plate 7 that wave band is 1550nm.Wave band is that pumping source generator 1 output optical fibre of 1060nm, signal source generator 2 output optical fibres that wave band is 1550nm connect wavelength division multiplexer 3 respectively.Be disposed with first condenser lens 4, PPLN crystal 5, second condenser lens 6, filter plate 7 on wavelength division multiplexer 3 output light paths.
Wave band is that the pumping source generator 1 of 1060nm comprises: 2N 1060nm band laser 11, first fiber amplifier 12, the array waveguide grating 13 that array arranges, N is natural number.Array waveguide grating 13 is arranged on 1060nm band laser 11 output light paths, and first fiber amplifier 12 is arranged on after the array waveguide grating 13.
Wave band is that the signal source generator 2 of 1550nm comprises: 1550nm band laser 21, second fiber amplifier 22.Second fiber amplifier 22 is arranged on after the 1550nm band laser 21.
Po Er pastes 8 and is attached on the PPLN crystal 5, and temperature controller 9 is used for control PPLN crystal temperature effect, and FTIS 10 is used for analyzing the laser spectroscopy of output.
1060nm band laser 11 is the LD laser of 1060nm wave band, and 1550nm band laser 21 is the LD laser of 1550nm wave band.The 1060nm band laser also other wave band be the laser of 1060nm, as EDFL(Erbium Doped Field Laser, erbium doped fiber laser).1550nm band laser 21 also can be that other wave band is the laser of 1550nm, as YDFL(Ytterbium Doped Field Laser, ytterbium-doping optical fiber laser).
In sum, the utility model is under the situation of determining the flashlight output wavelength, and only needing the PPLN crystal is implemented the control of segmentation temperature is the tuning output on a large scale that cocoa is realized multiwavelength laser.Utilize this characteristic, can the segmentation crystal temperature effect be set flexibly so that the mid-infrared laser wavelength is in the target position of spectral line according to the practical application needs, overcome can't be the on a large scale tuning inferior position of existing method middle infrared wavelength.
Claims (4)
1. based on the multi-wavelength mid-infrared laser generating means of PPLN, it is characterized in that comprising: wave band is the pumping source generator (1) of 1060nm, signal source generator (2), wavelength division multiplexer (3), first condenser lens (4), PPLN crystal (5), second condenser lens (6), the filter plate (7) that wave band is 1550nm; Wherein:
Described wave band is that pumping source generator (1) output optical fibre of 1060nm, signal source generator (2) output optical fibre that wave band is 1550nm connect wavelength division multiplexer (3) respectively;
Be disposed with first condenser lens (4), PPLN crystal (5), second condenser lens (6), filter plate (7) on described wavelength division multiplexer (3) output light path.
2. the multi-wavelength mid-infrared laser generating means based on PPLN according to claim 1, it is characterized in that: described wave band is that the pumping source generator (1) of 1060nm comprising: 2N 1060nm band laser (11), first fiber amplifier (12), the array waveguide grating (13) that array arranges, N is natural number, wherein:
Described array waveguide grating (13) is arranged on 1060nm band laser (11) output light path;
Described first fiber amplifier (12) is arranged on array waveguide grating (13) afterwards.
3. the multi-wavelength mid-infrared laser generating means based on PPLN according to claim 2, it is characterized in that: described wave band is that the signal source generator (2) of 1550nm comprising: 1550nm band laser (21), second fiber amplifier (22), wherein:
Described second fiber amplifier (22) is arranged on 1550nm band laser (21) afterwards.
4. the multi-wavelength mid-infrared laser generating means based on PPLN according to claim 3, it is characterized in that: described 1060nm band laser (11) is the LD laser of 1060nm wave band, and described 1550nm band laser (21) is the LD laser of 1550nm wave band..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320063156 CN203119288U (en) | 2013-02-05 | 2013-02-05 | Multi-wavelength mid infrared laser generating device based on PPLN (Periodically Poled Lithium Niobate) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320063156 CN203119288U (en) | 2013-02-05 | 2013-02-05 | Multi-wavelength mid infrared laser generating device based on PPLN (Periodically Poled Lithium Niobate) |
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|---|---|
| CN203119288U true CN203119288U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320063156 Expired - Fee Related CN203119288U (en) | 2013-02-05 | 2013-02-05 | Multi-wavelength mid infrared laser generating device based on PPLN (Periodically Poled Lithium Niobate) |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151692A (en) * | 2013-02-05 | 2013-06-12 | 南京信息工程大学 | Multi-wavelength intermediate infrared laser generation device based on periodically poled lithium niobate (PPLN) and control method thereof |
-
2013
- 2013-02-05 CN CN 201320063156 patent/CN203119288U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151692A (en) * | 2013-02-05 | 2013-06-12 | 南京信息工程大学 | Multi-wavelength intermediate infrared laser generation device based on periodically poled lithium niobate (PPLN) and control method thereof |
| CN103151692B (en) * | 2013-02-05 | 2015-02-04 | 南京信息工程大学 | Multi-wavelength intermediate infrared laser generation device based on periodically poled lithium niobate (PPLN) and control method thereof |
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Granted publication date: 20130807 Termination date: 20150205 |
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