CN102162966B - Spectrum spreading device for femtosecond laser frequency comb - Google Patents
Spectrum spreading device for femtosecond laser frequency comb Download PDFInfo
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- CN102162966B CN102162966B CN 201110085865 CN201110085865A CN102162966B CN 102162966 B CN102162966 B CN 102162966B CN 201110085865 CN201110085865 CN 201110085865 CN 201110085865 A CN201110085865 A CN 201110085865A CN 102162966 B CN102162966 B CN 102162966B
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Abstract
The invention relates to a spectrum spreading device for a femtosecond laser frequency comb, which belongs to the technical field of photophysics. The spectrum spreading device comprises a first planar mirror, a second planar mirror, a third planar mirror, a fourth planar mirror, a fifth planar mirror, a dispersion compensation prism pair, a first dispersion compensation chirp mirror pair, a second dispersion compensation chirp mirror pair and a photonic crystal fiber. By a method for outer cavity dispersion compensation and compression pulse, a femtosecond laser pulse generated by the femtosecond laser frequency comb of a difference frequency cavity is recompressed to have the width of dozens of femtosecond magnitudes and is injected into the photonic crystal fiber, and the spectrum is widened to the range of between 600mn and 1,000nm by using the effects such as high nonlinearity of the photonic crystal fiber and the like. The spectrum spreading device has a simple structure and low cost and is easy to realize, a widened optical frequency comb can be used for directly measuring frequency-stabilized laser frequency of 633nm, and a characteristic of long-time stable operation can still be kept.
Description
Technical field
Patent of the present invention relates to a kind of spread spectrum device that is used for the femtosecond laser frequency comb, and particularly a kind of spread spectrum device that is used for based on the femtosecond laser frequency comb of difference frequency chamber principle belongs to the optical physics technical field.
Background technology
With the titanium-doped sapphire is the femtosecond laser frequency comb of laser material; Can realize laser frequency measurement; But, it has used frequency multiplication beat frequency method (being called the f-2f method again) because combing in the process that locks onto the atomic clock frequency frequently; Need use photonic crystal fiber, cause the steady operation time can only reach about 40 minutes usually.The locking of the femtosecond laser frequency comb deviation frequency of the difference frequency chamber principle after improving need not to constitute phaselocked loop through photonic crystal fiber; Thereby compare with the f-2f method and to have long advantage of steady operation time; Can continous-stable work more than 9 hours; But because the radiation spectrum scope of titanium-doped sapphire is 660nm～1050nm, absorption spectrum ranges is 400nm～600nm, and the spectrum that gives off in the laser cavity of this laser material structure is about 660nm～950nm usually; Be difficult to comprise the wavelength below the 660nm, therefore can't directly measure with the femtosecond laser frequency comb of difference frequency chamber principle as the 633nm wavelength laser frequency of China's length amount mete-wand.
Summary of the invention
The objective of the invention is in order to overcome the defective of prior art; In order to realize that frequency comb can be used for directly measuring 633nm Frequency Stabilized Lasers frequency; And still keep the characteristic of steady operation for a long time, a kind of femtosecond laser frequency comb spread spectrum device based on difference frequency chamber principle is proposed.
The present invention realizes through following technical scheme.
A kind of spread spectrum device that is used for the femtosecond laser frequency comb of the present invention; Comprise first plane mirror, second plane mirror, the 3rd plane mirror, Siping City's face catoptron, the 5th plane mirror, dispersion compensation prism to, the first dispersion compensation chirped mirror to, the second dispersion compensation chirped mirror to and photonic crystal fiber, its peripherals is the femtosecond laser frequency comb based on difference frequency chamber principle;
The spectral range that is produced by the femtosecond laser frequency comb is that 650nm～950nm, pulsewidth are the femto-second laser pulse of picosecond magnitude; After first plane mirror and the second plane reflection mirror reflection; Inject of 2 order dispersion compensations and the pulsewidth compression of dispersion compensation prism to carrying out femtosecond laser; Afterwards through after the 3rd plane reflection mirror reflection; Inject the first dispersion compensation chirped mirror to proceeding dispersion compensation and pulse compression; The second dispersion compensation chirped mirror reinject afterwards to proceeding 3 order dispersion compensations and pulse compression; Behind the said process pulsewidth of femto-second laser pulse is compressed to the magnitude of tens femtoseconds by the magnitude of psec, injects photonic crystal fiber through Siping City's face catoptron and the 5th plane reflection mirror reflection again and carry out spectrum widening, reach 600nm～1000nm from the spectral range of the femto-second laser pulse of photonic crystal fiber outgoing.
Beneficial effect
The present invention is simple in structure, cost is low, be prone to realization; Use outside the chamber chromatic dispersion compensating prism to chirped mirror to the mode of combining; Carry out chromatic dispersion compensation and compression pulse outside the chamber, with difference frequency chamber femtosecond laser frequency comb produce owing in air, propagate the light comb that causes pulsewidth to increase to picosecond magnitude, be compressed to the width of tens femtosecond magnitudes again after; Inject photonic crystal fiber; The effect stretched-out spectrum scopes such as strong nonlinearity of utilizing photonic crystal fiber are to 600nm～1000nm, and the frequency comb behind the broadening can be used for directly measuring 633nm Frequency Stabilized Lasers frequency, and still keep the characteristic of steady operation for a long time.
Description of drawings
Fig. 1 is the structural representation of device of the present invention;
Wherein, 1 is the femtosecond laser frequency comb based on difference frequency chamber principle; 2,3,6,11 and 12 be respectively first plane mirror, second plane mirror, the 3rd plane mirror, Siping City's face catoptron and the 5th plane mirror, 4 and 5 formation dispersion compensation prisms are right, and 7 and 8 formations, the first dispersion compensation chirped mirror is right; 9 and 10 formations, the second dispersion compensation chirped mirror is right, and 13 is photonic crystal fiber.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Embodiment
A kind of spread spectrum device that is used for the femtosecond laser frequency comb; As shown in Figure 1; Comprise first plane mirror, second plane mirror, the 3rd plane mirror, Siping City's face catoptron, the 5th plane mirror, dispersion compensation prism to, the first dispersion compensation chirped mirror to, the second dispersion compensation chirped mirror to and photonic crystal fiber, its peripherals is the femtosecond laser frequency comb based on difference frequency chamber principle;
The spectral range that is produced by the femtosecond laser frequency comb is that 650nm～950nm, pulsewidth are the femto-second laser pulse of picosecond magnitude; After first plane mirror and the second plane reflection mirror reflection; Inject of 2 order dispersion compensations and the pulsewidth compression of dispersion compensation prism to carrying out femtosecond laser; Afterwards through after the 3rd plane reflection mirror reflection; Inject the first dispersion compensation chirped mirror to proceeding dispersion compensation and pulse compression; The second dispersion compensation chirped mirror reinject afterwards to proceeding 3 order dispersion compensations and pulse compression; Behind the said process pulsewidth of femto-second laser pulse is compressed to the magnitude of tens femtoseconds by the magnitude of psec, injects photonic crystal fiber through Siping City's face catoptron and the 5th plane reflection mirror reflection again and carry out spectrum widening, reach 600nm～1000nm from the spectral range of the femto-second laser pulse of photonic crystal fiber outgoing;
The repetition frequency of above-mentioned femtosecond laser frequency comb pulse is 350MHz, the about 350mW of the average power of the femtosecond laser that it sends, and the light path of two prisms of dispersion compensation prism centering is 70cm, all the other paths are that principle designs to try one's best briefly.
The above is preferred embodiment of the present invention, and the present invention should not be confined to the disclosed content of this embodiment and accompanying drawing.Everyly do not break away from the equivalence of accomplishing under the disclosed spirit of the present invention or revise, all fall into the scope of the present invention's protection.
Claims (4)
1. one kind is used for the spread spectrum device that femtosecond laser frequency is combed, and its peripherals is the femtosecond laser frequency comb based on difference frequency chamber principle, it is characterized in that:
Comprise first plane mirror, second plane mirror, the 3rd plane mirror, Siping City's face catoptron, the 5th plane mirror, dispersion compensation prism to, the first dispersion compensation chirped mirror to, the second dispersion compensation chirped mirror to and photonic crystal fiber;
Femtosecond laser by the generation of femtosecond laser frequency comb; After first plane mirror and the second plane reflection mirror reflection; Inject of 2 order dispersion compensations and the pulsewidth compression of dispersion compensation prism to carrying out femtosecond laser; Afterwards through after the 3rd plane reflection mirror reflection; Inject the first dispersion compensation chirped mirror to proceeding dispersion compensation and pulse compression, the second dispersion compensation chirped mirror that reinjects afterwards carries out spectrum widening through Siping City's face catoptron and the 5th plane reflection mirror reflection injection photonic crystal fiber again to proceeding 3 order dispersion compensations and pulse compression.
2. a kind of spread spectrum device that is used for the femtosecond laser frequency comb according to claim 1; It is characterized in that: the spectral range of the femto-second laser pulse that said femtosecond laser frequency comb produces is that 650nm～950nm, pulsewidth are picosecond magnitude; Is tens femtoseconds from the second dispersion compensation chirped mirror to the magnitude of the pulsewidth of the femto-second laser pulse that sends, is 600nm～1000nm from the spectral range of the femto-second laser pulse of photonic crystal fiber outgoing.
3. a kind of spread spectrum device that is used for the femtosecond laser frequency comb according to claim 1, it is characterized in that: the light path of two prisms of said dispersion compensation prism centering is 70cm.
4. a kind of spread spectrum device that is used for femtosecond laser frequency comb according to claim 1 is characterized in that: remove outside the light path of two prisms of dispersion compensation prism centering, all the other light paths design for principle according to the path of satisfying field condition is the shortest.
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| CN 201110085865 CN102162966B (en) | 2011-04-06 | 2011-04-06 | Spectrum spreading device for femtosecond laser frequency comb |
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| CN 201110085865 CN102162966B (en) | 2011-04-06 | 2011-04-06 | Spectrum spreading device for femtosecond laser frequency comb |
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| CN102162966A CN102162966A (en) | 2011-08-24 |
| CN102162966B true CN102162966B (en) | 2012-09-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103399447A (en) * | 2013-08-13 | 2013-11-20 | 中国航空工业集团公司北京长城计量测试技术研究所 | Generation method and device for dual-spectrum femtosecond laser frequency comb |
| CN103901699B (en) * | 2014-02-20 | 2016-05-11 | 中国科学院上海光学精密机械研究所 | The femtosecond laser pulse width compression device of cutting apart based on pulse |
| CN111600190B (en) * | 2020-06-12 | 2023-01-20 | 中国科学院上海光学精密机械研究所 | Super-strong chirp laser pulse step-by-step compression device |
| CN111965916B (en) * | 2020-08-05 | 2022-06-24 | 中国科学院理化技术研究所 | Deep ultraviolet optical frequency comb generating device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1431740A (en) * | 2003-02-14 | 2003-07-23 | 中国科学院上海光学精密机械研究所 | Optical parameter chatter pulses amplification laser system |
| CN1145243C (en) * | 2000-12-15 | 2004-04-07 | 中国科学院西安光学精密机械研究所 | Four-color femto second laser spectrum-extending beam-splitting orientation device |
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| US7414780B2 (en) * | 2003-06-30 | 2008-08-19 | Imra America, Inc. | All-fiber chirped pulse amplification systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1145243C (en) * | 2000-12-15 | 2004-04-07 | 中国科学院西安光学精密机械研究所 | Four-color femto second laser spectrum-extending beam-splitting orientation device |
| CN1431740A (en) * | 2003-02-14 | 2003-07-23 | 中国科学院上海光学精密机械研究所 | Optical parameter chatter pulses amplification laser system |
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