CN103956644A - Continuous ultraviolet laser based on periodical polarization reversal crystal straight cavity - Google Patents
Continuous ultraviolet laser based on periodical polarization reversal crystal straight cavity Download PDFInfo
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- CN103956644A CN103956644A CN201410206040.1A CN201410206040A CN103956644A CN 103956644 A CN103956644 A CN 103956644A CN 201410206040 A CN201410206040 A CN 201410206040A CN 103956644 A CN103956644 A CN 103956644A
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Abstract
The invention relates to a full-sold continuous ultraviolet laser capable of conducting efficiently output. The core content of the continuous ultraviolet laser is resonant intracavity frequency doubling, periodical polarization reversal crystal is adopted in frequency combination to achieve frequency conversion of resonance waves. The resonance cavity is a linear cavity, and ultraviolet rays are output by inserting a spectroscope into the cavity in an inclining mode. Polarization periodical design is conducted on a second harmonic crystal and a third harmonic crystal, so that the optimal temperature of the second harmonic crystal and the third harmonic crystal is matched with the working temperature of a semiconductor laser. As long as uniform temperature control is conducted on a semiconductor pump laser, a laser crystal, the second harmonic crystal and the third harmonic crystal, efficient and continuous ultraviolet laser output is achieved.
Description
Technical field
The invention belongs to laser technology field, particularly relate to based on the continuous ultraviolet laser of periodic polarized reversion crystal line chamber.
Background technology
The continuous laser of compact is attractive in industry and science application, as biomedical fluorescence analysis Raman spectrum, microlithography and optical check.In past 10 years, developing Biomedical Instruments of new generation always and finding alternative tradition to be used as the gas laser of excitaton source.But they also exist some shortcomings, comprise the limited life-span, low power efficiency and volume heaviness.Along with developing rapidly of new all-solid state laser technology, in the past ten years, traditional gas laser line be replaced by now one compacter, efficient, substitute reliably.In some cases, ultraviolet source is excited by LED light source, but under many circumstances, in the time requiring in high resolution detection, only has lasing light emitter that high brightness, spectral purity and outstanding beam quality can be provided.Complete solid too ultraviolet laser mainly utilizes nonlinear crystal to carry out outside chamber or interior frequency inverted realizes.Optical nonlinearity frequency translation mode has two kinds: birefringent phase matching technology and quasi-phase matching.Birefringent phase matching technology is to utilize the birefringent characteristic of single shaft or twin shaft nonlinear crystal, by selecting the wave vector direction of light wave and polarization direction to realize.1962, propose quasi-phase matching at Nobel's physics N.Blembergen of winner, and utilize the cycle transition of non-linear susceptibility can realize the enhancing of nonlinear frequency transformation efficiency.Birefringent phase matching technology is compared, and accurate phase matched does not have the restriction about wave vector direction and polarization direction in birefringent phase matching.Along with the development of periodic polarized reversion crystal, make quasi-phase matching become more and more effectively optical nonlinearity frequency translation mode in recent years.
Summary of the invention
For addressing the above problem, the invention provides based on the continuous ultraviolet laser in the straight chamber of periodic polarized reversion crystal, comprise with tail optical fiber output semiconductor laser, pumping coupling focusing system, the first laser resonant cavity mirror, laser crystal, second harmonic crystal, spectroscope, third overtone crystal, the second laser resonant cavity mirror and be plated in each crystal with chamber mirror on each film be.Putting in order of they is followed successively by band tail optical fiber output semiconductor laser, pumping coupling focusing system, the first laser resonant cavity mirror, laser crystal, second harmonic crystal, spectroscope, third overtone crystal, the second laser resonant cavity mirror.Wherein the first laser resonant cavity mirror and the second laser resonant cavity mirror form resonant cavity.Laser crystal absorbs semiconductor pumped laser and produces fundamental frequency light generation, fundamental frequency light produces second harmonic by second harmonic crystal, in second harmonic and chamber, the fundamental frequency light of vibration produces triple-frequency harmonics by third overtone crystal sum of fundamental frequencies, and triple-frequency harmonics is realized output by spectroscope in chamber.
Described laser diode pumping source can adopt laser diode, or laser two arrays of coupling fiber output, the pump light wavelength of described laser diode pumping source output is at room temperature 808nm or 880nm, and pump light focuses in laser crystal after collimation focusing system.In collimation focusing system, pump light antireflective film is all plated on eyeglass two sides.
The first described laser resonant cavity mirror, one side is plated pump light antireflective film, another side plating pump light antireflective film, the fundamental frequency light film that is all-trans.
The second described laser resonant cavity mirror, one side is plated fundamental frequency light, second harmonic, triple-frequency harmonics antireflective film, and another side is plated film not.
Described laser crystal can be selected from Nd:YVO
4, Nd:GdVO
4, Nd:YAP, Nd:YLF etc., realize fundamental frequency polarisation of light vibration.Laser crystal one side is plated pump light, fundamental frequency light antireflective film, the anti-reflection of another side plating fundamental frequency light, the second harmonic film that is all-trans.
The accurate phase matched mode of described second harmonic crystal by adopting, second harmonic crystal is selected from PPLN, MgO:PPLN, PPLT, MgO:PPLT, PPSLT, MgO:SPPLT, PPKTP etc.According to the different different dispersion equations of periodic polarized reversion crystal and non-linear coefficient of efficiency design different cycles, different length reaches second harmonic efficient wide temperature in chamber and transforms.Two-sided plating fundamental frequency light and second harmonic antireflective film.
Described third overtone crystal adopts accurate phase matched mode, because short period present stage polarization reversal crystal is made immature.While adopting accurate phase matched mode, also can only adopt second order or three rank matching ways.Crystal be selected from PPLT, MgO:PPLT, PPSLT, MgO:SPPLT, etc.Reach triple-frequency harmonics efficient wide temperature conversion in chamber according to different periodic polarized reversion crystalline dispersion equations and non-linear coefficient of efficiency design different cycles, different length.Two-sided plating fundamental frequency light, second harmonic, triple-frequency harmonics antireflective film.
Described spectroscope, one side is plated fundamental frequency light, second harmonic antireflective film, another side plating fundamental frequency light, second harmonic antireflective film and the triple-frequency harmonics film that is all-trans.Oblique cutting angle becomes 15 degree with vertical angle.
The object of patent of the present invention is to provide a kind of high-efficiency compact, based on the continuous ultraviolet laser of periodic polarized reversion crystal line chamber.This laser is by intracavity frequency doubling, and sum of fundamental frequencies adopts periodic polarized reversion crystal to realize the frequency translation of resonance wave, and resonant cavity adopts line chamber, and ultraviolet light enters a slice spectroscope by oblique cutting in chamber and realizes output.By the polarization cycle design to second harmonic crystal, third overtone crystal, make its work optimum temperature coupling semiconductor laser working temperature as long as semiconductor pump laser, laser crystal, second harmonic crystal, third overtone crystal are unified to temperature control, realize the output of high-efficiency and continuous Ultra-Violet Laser.
Brief description of the drawings
Fig. 1 is the structure composition schematic diagram of the embodiment of the present invention.
Embodiment
Embodiment 1
Referring to Fig. 1, patent of the present invention comprise with tail optical fiber output semiconductor laser 1, pumping coupling focusing system 2, the first laser resonant cavity mirror 3, laser crystal 6, second harmonic crystal 7, spectroscope 4, third overtone crystal 8, the second laser resonant cavity mirror 5 and be plated in each crystal with chamber mirror on each film be.Putting in order of they is followed successively by band tail optical fiber output semiconductor laser 1, pumping coupling focusing system 2, the first laser resonant cavity mirror 3, laser crystal 6, second harmonic crystal 7, spectroscope 4, third overtone crystal 8, the second laser resonant cavity mirror 5.Wherein the first laser resonant cavity mirror 3 and the second laser resonant cavity mirror 5 form resonant cavity.Laser crystal 6 absorbs semiconductor pumped laser and produces the vibration of fundamental frequency light polarization, fundamental frequency light produces second harmonic by second harmonic crystal 7, in second harmonic and chamber, the photosynthetic frequency of fundamental frequency of vibration produces triple-frequency harmonics by third overtone crystal 8, and triple-frequency harmonics is realized output by spectroscope in chamber 4.
Described band tail optical fiber output semiconductor laser 1 adopts laser diode, and the pump light wavelength of described laser diode pumping source output is at room temperature 808nm, and pump light focuses in laser crystal after collimation focusing system 2.In collimation focusing system, pump light antireflective film is all plated on eyeglass two sides.
The first described laser resonant cavity mirror 3, one side is plated pump light antireflective film, another side plating pump light antireflective film, the fundamental frequency light film that is all-trans.
The second described laser resonant cavity mirror 5, one side is plated fundamental frequency light, second harmonic and triple-frequency harmonics antireflective film, and another side is plated film not.
Described laser crystal 6 is Nd:YVO
4, realize the vibration of fundamental frequency polarisation of light.Laser crystal one side is plated pump light, fundamental frequency light antireflective film, another side plating fundamental frequency light antireflective film, the second harmonic film that is all-trans.
Described second harmonic crystal 7 adopts accurate phase matched mode, second harmonic crystal by adopting PPLN.Reach second harmonic efficient wide temperature conversion in chamber according to the different different dispersion equations of periodic polarized reversion crystal and non-linear coefficient of efficiency design different cycles, different length.Two-sided plating fundamental frequency light and second harmonic antireflective film.
Described third overtone crystal 8 adopts accurate phase matched mode, crystal by adopting PPLT.Reach triple-frequency harmonics efficient wide temperature conversion in chamber according to different periodic polarized reversion crystalline dispersion equations and non-linear coefficient of efficiency design different cycles, different length.Two-sided plating fundamental frequency light, second harmonic, triple-frequency harmonics antireflective film.
Described spectroscope 4, one side is plated fundamental frequency light, second harmonic antireflective film, another side plating fundamental frequency light, second harmonic antireflective film and the triple-frequency harmonics film that is all-trans.Oblique cutting angle becomes 15 degree with vertical angle.
Embodiment 2
Embodiment 2 difference from Example 1 are described laser two arrays that adopt coupling fiber output with tail optical fiber output semiconductor laser 1, and the pump light wavelength of its output is at room temperature 880nm; Described laser crystal 6 is Nd:GdVO
4, brilliant 7 bodies of second harmonic adopt MgO:PPLN, and third overtone crystal 8 adopts MgO:PPLT.
Claims (7)
1. based on the continuous ultraviolet laser of periodic polarized reversion crystal line chamber, it is characterized in that: described laser comprises band tail optical fiber output semiconductor laser, pumping coupling focusing system, the first laser resonant cavity mirror, laser crystal, second harmonic crystal, spectroscope, third overtone crystal, the second laser resonant cavity mirror and be plated in each crystal and chamber mirror on each film system, wherein putting in order of they is followed successively by band tail optical fiber output semiconductor laser, pumping coupling focusing system, the first laser resonant cavity mirror, laser crystal, second harmonic crystal, spectroscope, third overtone crystal, the second laser resonant cavity mirror.
2. require describedly based on the continuous ultraviolet laser of periodic polarized reversion crystal line chamber according to right 1, it is characterized in that: described band tail optical fiber output semiconductor laser adopts band tail optical fiber output 808nm or 880nm semiconductor laser
Require describedly based on the continuous ultraviolet laser of periodic polarized reversion crystal line chamber according to right 1, it is characterized in that: described laser crystal adopts Nd:YVO
4or Nd:GdVO
4or Nd:YAP or Nd:YLF.
3. require describedly based on the continuous ultraviolet laser of periodic polarized reversion crystal line chamber according to right 1, it is characterized in that: described second harmonic crystal by adopting PPLN or MgO:PPLN or PPLT or MgO:PPLT or PPSLT or MgO:SPPLT or PPKTP.
4. require describedly based on the continuous ultraviolet laser of periodic polarized reversion crystal line chamber according to right 1, it is characterized in that: described third overtone crystal adopts PPLT or MgO:PPLT or PPSLT or MgO:SPPLT or LBO.
5. require described based on the continuous ultraviolet laser of periodic polarized reversion crystal line chamber according to right 1, in chamber, oblique cutting enters a slice spectroscope and realizes triple-frequency harmonics ultraviolet light output, spectroscope one side is plated fundamental frequency light and second harmonic antireflective film, another side plating fundamental frequency light, second harmonic antireflective film and the triple-frequency harmonics film that is all-trans.
6. require describedly based on the continuous ultraviolet laser of periodic polarized reversion crystal line chamber according to right 1, it is characterized in that: described the first laser resonant cavity mirror, one side is plated pump light antireflective film, another side plating pump light antireflective film, the fundamental frequency light film that is all-trans.
7. require describedly based on the continuous ultraviolet laser of periodic polarized reversion crystal line chamber according to right 1, it is characterized in that: described the second laser resonant cavity mirror, one side is plated fundamental frequency light, second harmonic and the triple-frequency harmonics film that is all-trans, and another side is plated film not.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410206040.1A CN103956644A (en) | 2014-05-16 | 2014-05-16 | Continuous ultraviolet laser based on periodical polarization reversal crystal straight cavity |
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| CN201410206040.1A CN103956644A (en) | 2014-05-16 | 2014-05-16 | Continuous ultraviolet laser based on periodical polarization reversal crystal straight cavity |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108683071A (en) * | 2018-07-05 | 2018-10-19 | 中国科学院福建物质结构研究所 | A kind of periodic polarized crystal waveguide device and laser with closed loop waveguiding structure |
| CN110068979A (en) * | 2019-04-30 | 2019-07-30 | 山东大学 | A kind of visible ultraviolet band optical frequency converter |
| CN112260042A (en) * | 2020-09-14 | 2021-01-22 | 深圳联品激光技术有限公司 | Ultraviolet pulse laser |
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| CN1691442A (en) * | 2004-04-20 | 2005-11-02 | 中国科学院福建物质结构研究所 | Frequency multiplication ultraviolet solid laser applying non-linear laser crystal |
| CN102522691A (en) * | 2011-12-31 | 2012-06-27 | 厦门大学 | Neodymium-doped continuous ultraviolet laser adopting linear cavity |
| US20130250979A1 (en) * | 2012-03-20 | 2013-09-26 | Martin H. Muendel | Stabilizing beam pointing of a frequency-converted laser system |
| CN103545706A (en) * | 2013-09-02 | 2014-01-29 | 长春理工大学 | All-solid-state 355nm laser |
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2014
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Patent Citations (4)
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| CN1691442A (en) * | 2004-04-20 | 2005-11-02 | 中国科学院福建物质结构研究所 | Frequency multiplication ultraviolet solid laser applying non-linear laser crystal |
| CN102522691A (en) * | 2011-12-31 | 2012-06-27 | 厦门大学 | Neodymium-doped continuous ultraviolet laser adopting linear cavity |
| US20130250979A1 (en) * | 2012-03-20 | 2013-09-26 | Martin H. Muendel | Stabilizing beam pointing of a frequency-converted laser system |
| CN103545706A (en) * | 2013-09-02 | 2014-01-29 | 长春理工大学 | All-solid-state 355nm laser |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108683071A (en) * | 2018-07-05 | 2018-10-19 | 中国科学院福建物质结构研究所 | A kind of periodic polarized crystal waveguide device and laser with closed loop waveguiding structure |
| CN108683071B (en) * | 2018-07-05 | 2023-06-09 | 中国科学院福建物质结构研究所 | Periodically polarized crystal waveguide device with closed-loop waveguide structure and laser |
| CN110068979A (en) * | 2019-04-30 | 2019-07-30 | 山东大学 | A kind of visible ultraviolet band optical frequency converter |
| CN110068979B (en) * | 2019-04-30 | 2020-04-24 | 山东大学 | Visible-to-ultraviolet band optical frequency converter |
| CN112260042A (en) * | 2020-09-14 | 2021-01-22 | 深圳联品激光技术有限公司 | Ultraviolet pulse laser |
| CN112260042B (en) * | 2020-09-14 | 2022-01-25 | 深圳联品激光技术有限公司 | Ultraviolet pulse laser |
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