CN104701713A - Photonic crystal fiber THz laser device - Google Patents
Photonic crystal fiber THz laser device Download PDFInfo
- Publication number
- CN104701713A CN104701713A CN201510132115.0A CN201510132115A CN104701713A CN 104701713 A CN104701713 A CN 104701713A CN 201510132115 A CN201510132115 A CN 201510132115A CN 104701713 A CN104701713 A CN 104701713A
- Authority
- CN
- China
- Prior art keywords
- photonic crystal
- crystal fiber
- core diameter
- laser
- sealing cap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Lasers (AREA)
Abstract
The invention relates to the technical field of a terahertz laser device. In order to lessen the volume of the THz laser device and enhance the conversion efficiency of the THz laser device, the invention discloses a novel THz laser device with high optical quality, low transmission loss, reliability, steadiness and small volume. For the purpose, the technical scheme of the photonic crystal fiber THz laser device is that infrared waves outputted by the laser device are converged to the fiber core of the big-core photonic crystal fiber II through a zinc selenide converging lens, a barium fluoride sealing cap, and a big-core bare fiber adapter I; the output end of the big-core photonic crystal fiber II sequentially passes through a big-core bare fiber adapter II and a bare fiber adapter bushing, and then connects with the big-core bare fiber adapter II and the big-core photonic crystal fiber I; except for the laser device and the zinc selenide converging lens, said components are arranged in an air chamber. The laser device is mainly applied to design and manufacturing of the THz laser device.
Description
Technical field
The present invention relates to a kind of thz laser device technical field, specifically relate to a kind of New-type photon crystal optical fiber THz laser.
Background technology
The electromagnetic wave of THz laser radiation wavelength between 30 μm of-3mm is the electromagnetic radiation region between millimeter wave and infrared waves.THz ripple has lower photon energy, can not can to damage as X ray penetrate tissue organ to tissue.Because hydrone has stronger absorption to THz, therefore may be used for organic organization and the water constituent region constantly changed to separate, thus be widely used in medical diagnosis.In addition, many large biological molecules, such as amino acid, explosive and drugs can produce strong absorption and resonance to corresponding THz ripple, and THz spectral technique is had broad application prospects in the physicochemical properties, safety supervision, drug law enforcement anti-terrorism, environment measuring etc. of analysis and research large biological molecule.
In recent years due to the develop rapidly of ultrafast laser technique and free electron laser, for THz source provides reliable and stable excitation source.Current most THz laser mainly adopts thick quartz ampoule as generator tube, makes the bulky of equipment, and generator tube can not bend, be inconvenient to move, and seriously governs application and the commercialization of THz laser.And large a kind of novel optical fiber of core diameter photonic crystal fiber, by light being all limited in air-core district substantially to the design optimization of photonic crystal fiber internal mechanism, utilize photonic crystal fiber core region can as the absorption cell of light signal, for the interaction of light and material provides good environment, and photonic crystal fiber comparatively rubble English pipe there is better pliability, thus greatly can reduce the volume of THz generator tube.But rare mature technology report.
Summary of the invention
For overcoming the deficiencies in the prior art, reducing the volume of THz laser, improving the conversion efficiency of THz laser, provide a kind of and there is high light beam quality, low transmission loss, the reliable and stable and novel THz laser that volume is little.For this reason, the technical scheme that the present invention takes is photonic crystal fiber THz laser, and structure is: the infrared waves that laser exports converges to the fibre core of large core diameter photonic crystal fiber II through zinc selenide convergent lens, barium fluoride sealing cap, the greatly naked fine adapter I of core diameter; The output of large core diameter photonic crystal fiber II is connected with described large core diameter photonic crystal fiber I with the large naked fine adapter III of core diameter by the naked fine adapter II of large core diameter, naked fine adapter sleeves successively; The output of described large core diameter photonic crystal fiber I is exported by naked another polyethylene sealing cap of fine adapter IV of large core diameter; Except laser, zinc selenide convergent lens, aforementioned each part is all arranged in air chamber, and described barium fluoride sealing cap, the large naked fine adapter I of core diameter are fixed on air chamber one end, and the naked fine adapter IV of large core diameter and another polyethylene sealing cap are fixed on the air chamber other end; CH3OH steam filled by air chamber.
Laser is carbon dioxide laser, its infrared waves exported enters the fibre core of described large core diameter photonic crystal fiber I through described barium fluoride sealing cap, make the CH3OH steam generation population inversion of fibre core, along with the increase of the pump power of carbon dioxide laser, upper energy level population increases sharply, after the pump power of described carbon dioxide laser exceedes threshold value, THz laser exports through described large core diameter photonic crystal fiber I and another polyethylene sealing cap.
The structure of large core diameter photonic crystal fiber is: fiber cladding outer diameter A 1=350um, fiber cladding internal diameter A2=290um, airport internal diameter B1=64.5um, airport external diameter B2=80um, fibre core internal diameter C1=100um, fibre core external diameter C2=130um.
The method of pressure difference is adopted to inflate air chamber: when air pressure needed for air chamber is higher than ambient pressure, first open polyethylene sealing cap, then gas compartment is inflated, when the pressure values change of gas compartment is tending towards constant, with polyethylene sealing cap, air chamber is sealed, and terminate inflation; When needing to improve chamber vacuum degree, first open polyethylene sealing cap, then gas compartment is inflated, when the pressure values change of gas compartment is tending towards constant, with polyethylene sealing cap, air chamber is sealed, then vacuum pumping is being carried out until required vacuum degree to air chamber.
Compared with the prior art, technical characterstic of the present invention and effect:
The New-type photon crystal optical fiber THz laser that the present invention proposes reduces the volume in THz source greatly, make CO2 laser and CH3OH gas Interaction enhanced simultaneously, the loss of CO2 laser reduces, thus improve conversion efficiency, for realizing having high light beam quality, low transmission loss, reliable and stable and the THz laser that volume is little provides new approach.Market prospects of the present invention are good, and each functional realiey mode is simple, have good technical transform basis.Because the present invention is our independent intellectual property right, and there is multi-functional characteristic, therefore can realize social benefit widely.
Accompanying drawing explanation
Accompanying drawing 1 is New-type photon crystal optical fiber THz laser structure schematic diagram.
Accompanying drawing 2 is large core diameter photonic crystal fiber cross section.
Accompanying drawing 3 is that CO2 laser is at large core diameter photonic crystal fiber internal mold field pattern.
Accompanying drawing 4 is that THz is at large core diameter photonic crystal fiber internal mold field pattern.
In figure, 1-CO2 laser, 2-ZnSe convergent lens, the 3-large naked fine adapter I of core diameter
The naked fine adapter III 6-large core diameter photonic crystal fiber I of the naked fine adapter II 5-large core diameter of 4-large core diameter
7-large naked fine adapter the IV of core diameter 8-polyethylene sealing cap 9-gas compartment
10-naked fine adapter sleeves 11-fusion point 12-large core diameter photonic crystal fiber II
13-barium fluoride sealing cap, 21-fiber cladding outer diameter A, 1 22-fiber cladding internal diameter A2
23-airport internal diameter B1,24-airport external diameter B2,25-fibre core internal diameter C1
26-fibre core external diameter C2.
Embodiment
The present invention adopts large core diameter photonic crystal fiber as carbon dioxide (CO2) laser and the interactional gas cell of methyl alcohol (CH3OH) steam, greatly reduce the volume in THz source, add CO2 laser and the interactional intensity of CH3OH gas, the large core diameter photonic crystal fiber simultaneously designed can reduce the loss of CO2 laser, improve the conversion efficiency of laser, for realizing having high light beam quality, low transmission loss, reliable and stable and the THz laser that volume is little provides new approach.
The New-type photon crystal optical fiber THz laser that the present invention proposes mainly adopts large core diameter hollow-core photonic crystal fiber as the generator tube of THz ripple, reduce the loss of CO2 laser, strengthen CO2 laser and the interactional intensity of CH3OH gas, improve the conversion efficiency of THz, realize the reliable and stable and THz laser that volume is little.
The present invention utilizes following technical proposals to realize: the infrared waves (wavelength is 10.6 μm) that described CO2 laser exports converges to the fibre core of described large core diameter photonic crystal fiber II through described zinc selenide (ZnSe) convergent lens.For ensureing the pressure of described air chamber, the incidence end of described large core diameter photonic crystal fiber is connected with described barium fluoride sealing cap by the described naked fine adapter I of large core diameter.The output of described large core diameter photonic crystal fiber II is connected with described large core diameter photonic crystal fiber I through described naked fine adapter sleeves with the naked fine adapter III of described large core diameter by the naked fine adapter II of described large core diameter.The output of described large core diameter photonic crystal fiber I is fixed on described air chamber by the naked fine adapter IV of described large core diameter.For ensureing the pressure of described air chamber, the naked fine adapter IV of described large core diameter is sealed by described polyethylene sealing cap.The infrared waves exported when described CO2 laser to enter the fibre core of described large core diameter photonic crystal fiber I through described barium fluoride sealing cap, make the CH3OH steam generation population inversion of fibre core, along with the increase of the pump power of described CO2 laser, upper energy level population increases sharply, when after threshold value more than THz laser of the pump power of described CO2 laser, THz exports through described large core diameter photonic crystal fiber I and described polyethylene sealing cap.
Below in conjunction with embodiment, the present invention is described in further detail.As shown in Figure 1, the New-type photon crystal optical fiber THz laser that the present invention proposes mainly contains CO2 laser pump source and THz air chamber two large divisions is formed.
Described CO2 laser (1) converges to the fibre core of described large core diameter photonic crystal fiber II (12) through described ZnSe convergent lens (2).THz air chamber is by described barium fluoride sealing cap (13), described large core diameter photonic crystal fiber II (12), the naked fine adapter I (3) of described large core diameter, the naked fine adapter II (4) of described large core diameter, the naked fine adapter III (5) of described large core diameter, described large core diameter photonic crystal fiber I (6), the naked fine adapter IV (7) of described large core diameter, described naked fine adapter sleeves (10), described polyethylene sealing cap (8) and described gas compartment (9) composition.
Described large core diameter photonic crystal fiber I (6) is connected through described naked fine adapter sleeves (10) with described large core diameter photonic crystal fiber II (12), described naked fine adapter sleeves (10) is not exclusively closed sleeve pipe, to ensure that CH3OH steam enters described large core diameter photonic crystal fiber I (6) and CO2 laser interaction.The naked fine adapter I (3) of described large core diameter and the naked fine adapter IV (7) of described large core diameter are separately fixed on two end faces of described gas compartment (9), and respectively it is sealed with described barium fluoride sealing cap (13) and described polyethylene sealing cap (8), then be filled with CH3OH steam after described air chamber (9) being vacuumized, make the pressure of CH3OH steam in THz air chamber be 0.2-0.4 millibar.CO2 laser through described barium fluoride sealing cap (13) successively by described large core diameter photonic crystal fiber II (12), the naked fine adapter I (3) of described large core diameter, the naked fine adapter II (4) of described large core diameter and the CH3OH vapor phase mutual effect that to enter through described naked fine adapter sleeves (10) in described large core diameter photonic crystal fiber I (6).
The infrared waves exported when described CO2 laser (1) enters fibre core and the mutual effect of CH3OH vapor phase of described large core diameter photonic crystal fiber I (6) through described barium fluoride sealing cap (13), make the CH3OH steam generation population inversion in fibre core, when the power output of described CO2 laser (1) reaches 30W, export THz through described large core diameter photonic crystal fiber I (6) and described polyethylene sealing cap (8).
The performance of the New-type photon crystal optical fiber THz laser proposed for making the present invention reaches optimum, needs to ensure in implementation process:
1., for ensureing that THz laser has high conversion efficiency, barium fluoride sealing cap and polyethylene sealing cap need have high transmitance.
2. adopt the method for pressure difference to inflate THz air chamber: when air pressure needed for air chamber is higher than ambient pressure, first open polyethylene sealing cap, then gas compartment is inflated, when the pressure values change of gas compartment is tending towards constant, with polyethylene sealing cap, air chamber is sealed, and terminate inflation; When needing to improve chamber vacuum degree, first open polyethylene sealing cap, then gas compartment is inflated, when the pressure values change of gas compartment is tending towards constant, with polyethylene sealing cap, air chamber is sealed, then vacuum pumping is being carried out until required vacuum degree to air chamber.
3. need to carry out appropriate design to the size of large core diameter photonic crystal fiber, as shown in Figure 2, described fiber cladding outer diameter A 1=350um, described fiber cladding internal diameter A2=290um, described airport external diameter B2=80um, described airport internal diameter B1=64.5um, described fibre core external diameter C2=130um, described fibre core internal diameter C1=100um, to ensure that CO2 laser (accompanying drawing 3) and THz ripple (accompanying drawing 4) have good mode distributions, ensure high beam quality.
Although invention has been described for composition graphs above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; when not departing from present inventive concept, can also make a lot of distortion, these all belong within protection of the present invention.
Claims (4)
1. a photonic crystal fiber THz laser, is characterized in that, structure is: the infrared waves that laser exports converges to the fibre core of large core diameter photonic crystal fiber II through zinc selenide convergent lens, barium fluoride sealing cap, the greatly naked fine adapter I of core diameter; The output of large core diameter photonic crystal fiber II is connected with described large core diameter photonic crystal fiber I with the large naked fine adapter III of core diameter by the naked fine adapter II of large core diameter, naked fine adapter sleeves successively; The output of described large core diameter photonic crystal fiber I is exported by naked another polyethylene sealing cap of fine adapter IV of large core diameter; Except laser, zinc selenide convergent lens, aforementioned each part is all arranged in air chamber, and described barium fluoride sealing cap, the large naked fine adapter I of core diameter are fixed on air chamber one end, and the naked fine adapter IV of large core diameter and another polyethylene sealing cap are fixed on the air chamber other end; CH3OH steam filled by air chamber.
2. photonic crystal fiber THz laser as claimed in claim 1, it is characterized in that, laser is carbon dioxide laser, its infrared waves exported enters the fibre core of described large core diameter photonic crystal fiber I through described barium fluoride sealing cap, make the CH3OH steam generation population inversion of fibre core, along with the increase of the pump power of carbon dioxide laser, upper energy level population increases sharply, after the pump power of described carbon dioxide laser exceedes threshold value, THz laser exports through described large core diameter photonic crystal fiber I and another polyethylene sealing cap.
3. photonic crystal fiber THz laser as claimed in claim 1, it is characterized in that, the structure of large core diameter photonic crystal fiber is: fiber cladding outer diameter A 1=350um, fiber cladding internal diameter A2=290um, airport external diameter B2=80um, airport internal diameter B1=64.5um, fibre core external diameter C2=130um, fibre core internal diameter C1=100um.
4. photonic crystal fiber THz laser as claimed in claim 1, it is characterized in that, the method of pressure difference is adopted to inflate air chamber: when air pressure needed for air chamber is higher than ambient pressure, first open polyethylene sealing cap, then gas compartment is inflated, when the pressure values change of gas compartment is tending towards constant, with polyethylene sealing cap, air chamber is sealed, and terminate inflation; When needing to improve chamber vacuum degree, first open polyethylene sealing cap, then gas compartment is inflated, when the pressure values change of gas compartment is tending towards constant, with polyethylene sealing cap, air chamber is sealed, then vacuum pumping is being carried out until required vacuum degree to air chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510132115.0A CN104701713B (en) | 2015-03-25 | 2015-03-25 | Photonic crystal fiber THz lasers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510132115.0A CN104701713B (en) | 2015-03-25 | 2015-03-25 | Photonic crystal fiber THz lasers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104701713A true CN104701713A (en) | 2015-06-10 |
| CN104701713B CN104701713B (en) | 2018-10-23 |
Family
ID=53348588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510132115.0A Active CN104701713B (en) | 2015-03-25 | 2015-03-25 | Photonic crystal fiber THz lasers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104701713B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289540A (en) * | 2019-07-18 | 2019-09-27 | 天津大学 | A kind of cladding pumping mono-mode terahertz light fibre laser |
| WO2022228153A1 (en) * | 2021-04-26 | 2022-11-03 | 武汉大学 | Terahertz gas laser |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008015438A1 (en) * | 2006-08-04 | 2008-02-07 | University Of Bath | Optical wave generator |
| CN101499606A (en) * | 2009-02-27 | 2009-08-05 | 山东科技大学 | THz optical fiber laser |
| WO2011001521A1 (en) * | 2009-07-01 | 2011-01-06 | パイオニア株式会社 | Terahertz light generating device and method |
| CN102279154A (en) * | 2011-06-23 | 2011-12-14 | 天津大学 | Hollow photon crystal optical fiber-based optical fiber-connected low-pressure gas chamber device |
| CN204517126U (en) * | 2015-03-25 | 2015-07-29 | 天津大学 | Photonic crystal fiber THz laser |
-
2015
- 2015-03-25 CN CN201510132115.0A patent/CN104701713B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008015438A1 (en) * | 2006-08-04 | 2008-02-07 | University Of Bath | Optical wave generator |
| CN101499606A (en) * | 2009-02-27 | 2009-08-05 | 山东科技大学 | THz optical fiber laser |
| WO2011001521A1 (en) * | 2009-07-01 | 2011-01-06 | パイオニア株式会社 | Terahertz light generating device and method |
| CN102279154A (en) * | 2011-06-23 | 2011-12-14 | 天津大学 | Hollow photon crystal optical fiber-based optical fiber-connected low-pressure gas chamber device |
| CN204517126U (en) * | 2015-03-25 | 2015-07-29 | 天津大学 | Photonic crystal fiber THz laser |
Non-Patent Citations (1)
| Title |
|---|
| 何雅兰: "《低损耗太赫兹金属空心波导的研究》", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289540A (en) * | 2019-07-18 | 2019-09-27 | 天津大学 | A kind of cladding pumping mono-mode terahertz light fibre laser |
| WO2022228153A1 (en) * | 2021-04-26 | 2022-11-03 | 武汉大学 | Terahertz gas laser |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104701713B (en) | 2018-10-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204517126U (en) | Photonic crystal fiber THz laser | |
| CN105355528B (en) | A kind of bielectron note terahertz radiation source for crossing mould cascade high-frequency structure | |
| CN105207042A (en) | THz wave radiation source with oval groove grating structure | |
| CN103411903B (en) | THz radiation reinforcing method through light line array | |
| CN102147495B (en) | Nonlinear fiber and ultrashort pulse generating device applying same | |
| CN104701713A (en) | Photonic crystal fiber THz laser device | |
| CN107046220A (en) | A kind of all-fiber high power mid and far infrared super continuum source | |
| CN109839785A (en) | A kind of frequency upconversion device of hollow antiresonance optical fiber | |
| CN101499606B (en) | THz optical fiber laser | |
| CN102540328A (en) | Photonic crystal fiber, THz wave parametric oscillation generating system and method | |
| CN101494353B (en) | THz Laman fibre-optical laser | |
| CN110289540A (en) | A kind of cladding pumping mono-mode terahertz light fibre laser | |
| CN105470807A (en) | Carbon dioxide infrared hollow-core fiber laser and manufacturing method thereof | |
| CN202957445U (en) | Cooling device for reflective lens of carbon dioxide laser | |
| CN103644534A (en) | Red and blue laser plant lamp | |
| CN111478667A (en) | Solar simulator for testing space multi-junction solar cell | |
| CN108628058B (en) | On-chip integrated mid-infrared super-continuum spectrum light source | |
| CN105490139A (en) | High-power all-fiber near and middle infrared super-continuum spectrum laser light source | |
| CN111864516B (en) | Narrow-linewidth all-fiber cascade 4.66 mu m optical fiber gas laser with oscillator structure | |
| CN201360098Y (en) | Compact-type THz Raman optical fiber laser | |
| CN106785834A (en) | Super continuum source based on noise like mode locking pulse pumping | |
| CN201576108U (en) | Equipment manufacturing T-Hz fiber gratings | |
| CN201444531U (en) | Compact type THz fiber laser and evacuating and inflating device thereof | |
| CN106094262A (en) | A kind of automatically controlled Terahertz amplitude modulator and manufacture method thereof | |
| CN201570774U (en) | Pumping cavity of laser diode side pumping solid laser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |