CN203012313U - Device of optical frequency comb for acquiring high-frequency wideband green light - Google Patents
Device of optical frequency comb for acquiring high-frequency wideband green light Download PDFInfo
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- CN203012313U CN203012313U CN 201220652707 CN201220652707U CN203012313U CN 203012313 U CN203012313 U CN 203012313U CN 201220652707 CN201220652707 CN 201220652707 CN 201220652707 U CN201220652707 U CN 201220652707U CN 203012313 U CN203012313 U CN 203012313U
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Abstract
The utility model relates to a device of an optical frequency comb for acquiring high-frequency wideband green light. The device is characterized by comprising a plurality of lasers (1), a plurality of phase lock circuit controllers (2), a frequency standard (3), a time-delay controller (4), a plurality of non-linear crystal (5) and a beam combiner which are connected in sequence. According to the device, the problems of narrow light spectrum, low pulse power, difficult control on time-frequency characteristic and the like of the traditional green light generating technology are solved, the average frequency of green light is improved, the green light brightness is enhanced, and the frequency of the frequency-multiple light and the average frequency of green light pulse are improved.
Description
[technical field]
The utility model relates to a kind of device that obtains high power broadband green glow optical frequency com.
[background technology]
The accurate broadband green optical pulse light source of controlling of time-frequency domain at present comprise that material processed, medical diagnosis, instrument manufacturing, fundamental research, optical storage, amusement, recording image, Detection ﹠ Controling, panchromatic demonstration, direction finding and indication, national defense and military etc. are civilian, the application of industry and military field becomes increasingly conspicuous.Particularly in recent years, development along with the high precision int of the densification of optical disc storage and laser printer, the focus that the accurate green-light source of controlling has become people to pay close attention to, on the other hand, green pulse laser also provides a kind of desirable light source for the laser radar method, and can combine with the visible light wave range Detection Techniques of maturation, come position (distance and the angle) information of accurate measurement target object by the time of return of Measurement and analysis laser pulse, or even the motion state of object (speed, vibration and attitude) and shape.Development along with laser technology, green glow light comb laser instrument has improved the detection accuracy of laser radar method to a great extent, the frequency that himself is stable and phase propetry, make to combine the phase difference measurement technology on the basis of pulse time-of-flight measuring technique, and the detection accuracy of whole method has been brought up to the wavelength period magnitude.In addition, high-power broadband green glow light comb method can expand blue light and ultraviolet comb pulse on the basis of nonlinear optics frequency multiplication, further accelerates the development of the technology such as accurate Ultra-Violet Laser processing, ultraviolet photolithographic and precise light comb spectrum.
The present method that produces green laser has a variety of, mainly can divide three kinds:
(1) material directly excites the generation green glow to utilize broad-band gap partly to lead not, and by modulating the green light pulse output of material two ends electric current realization modulation.The advantage of this method is simple in structure, but its shortcoming is that output power is lower, and is subject to the restriction of circuit methods bandwidth, the green light pulse wider width, and do not possess the coherence of time-frequency domain.
(2) mix people's rare earth ion in solid material, under the condition of semiconductor laser or other light sources pumping, directly utilize the energy level transition of rare earth ion and produce green laser.But the shortcoming of this method is the wavelength of pulse and is subject to the restriction of ion of adulterating, and is difficult to obtain high-power pulsed light output.
(3) utilize the nonlinear optical effect of optical crystal, produce second harmonic or frequency doubled light.For example utilize the laser instrument of mixing Nd3+ or Yb3+ to produce wavelength at the near-infrared laser of 1.06um, then utilize frequency-doubling crystal, as KTP, BBO, LiNbO3, LiTaO3 or KNbO3, produce near the frequency doubled light of 530nm.The advantage of this method is to realize the ultrashort pulse of locked mode, and utilizes the advantages for development of laser crystal or the double clad gain fibre of mixing at present Nd3+ or Yb3+, can realize high-power green glow output.
There are some shortcomings that are difficult to overcome equally in the nonlinear optics frequency inverted, for example:
A) the nonlinear optics shg efficiency is lower, and is subject to the restriction of frequency-doubling crystal damage threshold, the power limited of frequency doubling green light;
B) nonlinear optics frequency multiplication process has the restriction of strict phase-matching condition, is difficult to realize the output of broadband SHG light;
C) because frequency multiplication is second order nonlinear optical effect, so shg efficiency seriously is subject to the restriction of incident light peak power, the spectrum of green glow is narrowed in the frequency multiplication process simultaneously, can't realize the green glow output in broadband.
D) in the process that obtains high power near infrared pump light, need to adopt image intensifer paired pulses power to amplify, and the gain spectrum width of amplifier has limited the spectral width of frequency doubling green light equally.
E) high power amplifies and can improve the energy of pulse, and then improve the efficient of non-linear frequency multiplication, but the high power amplification process can destroy the time domain of pulse to distribute, cause pulse deformation and division, also can affect simultaneously the space optical quality of pulse, to such an extent as to focusing and the transmitting procedure of confine optical beam in crystal, and the generation efficiency of reduction frequency doubled light.
F) the high power amplification process can be introduced multiple additional Nonlinear phase noise and spontaneous emission noise by paired pulses, affects the time meta-frequency spectrum stability of pulse, causes difficulty for further realizing the pulse of light comb.
In sum, although have at present the multiple technology and method of realizing the high power green light pulse, all exist various shortcomings and deficiencies.
[utility model content]
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of device that obtains high power broadband green glow optical frequency com is provided, this device has overcome that spectrum in traditional green glow generating technique is narrow, pulse power is low, time-frequency characteristic is difficult to the problems such as control, this device has improved the green glow average power, strengthen green glow brightness, improved the efficient of frequency doubled light and the average power of green light pulse.
For achieving the above object, the utility model has adopted following technical proposals:
A kind of device that obtains high power broadband green glow optical frequency com comprises a plurality of laser instruments, a plurality of phase lock circuitry controller, frequency standard device, delay controller, a plurality of nonlinear crystal, the bundling device that connect in turn.
Laser instrument is the mode-locked laser that repetition frequency and pulse carrier envelope phase zero-frequency are locked by precision simultaneously as mentioned above.
As mentioned above the frequency standard device be a frequency stabilization the narrow linewidth continuous wave laser.
The frequency standard device is a radio frequency atomic clock as mentioned above.
Nonlinear crystal is BBO Crystal as mentioned above.
Nonlinear crystal is periodic polarized lithium columbate crystal as mentioned above.
The beneficial effects of the utility model are:
1, the time-frequency domain control accuracy of green glow is high; Adopt feedback control technology and the phase noise real-Time Compensation technology of carrier envelope phase in device, solved the fast problem that becomes and become slowly of phase place zero-frequency, effectively suppressed the additive phase noise in power amplification and Pulse Compression process.
2, adopt the stable light comb light source frequency multiplication of time scale window to produce green glow, and carry out on this basis the relevant synthetic of green glow, strengthened green glow brightness when having improved the green glow average power.
3, the utility model has adopted the relevant synthetic mode of multi beam green glow, has realized the Spectral beam combining of multi-wavelength green light pulse, and finally obtains the green glow output of a branch of broadband, has solved the narrower problem of single beam laser frequency multiplication spectrum.
4, comb pulse for every road high power light in the utility model and carry out independently frequency multiplication process, can select suitable frequency-doubling crystal for the specific wavelength of every road light, thereby realize high efficiency laser freuqency doubling.
5, can combine with present full-fledged fiber amplifier technology preferably, utilize the advantage of Double-clad fiber amplifier method, effectively improve the efficient of frequency doubled light and the average power of green light pulse.
6, overcome the effect of narrowing of non-linear frequency multiplication and Optical pulse amplification process paired pulses spectrum, realized the broadband green radiant by the relevant synthesis mode of a kind of new spectrum.
7, stable green glow light comb pulse output can be used as arbitrary source and further a plurality of green-light source is synthesized more high-power green glow output by the synthetic mode of a kind of coherent network.
8, new spectral range be can expand, high-power broadband blue light and ultraviolet comb light source further realized.
[description of drawings]
Fig. 1 is the synthetic structural representation that produces broadband green glow light comb of pulse coherence;
[embodiment]
Below in conjunction with accompanying drawing, the utility model is done further detailed description:
as shown in Figure 1, a kind of device that obtains high power broadband green glow optical frequency com, comprise a plurality of laser instruments 1 that connect in turn, a plurality of phase lock circuitry controllers 2, frequency standard device 3, delay controller 4, a plurality of nonlinear crystals 5, bundling device 6, it is seed light source that this device adopts near the mode-locked laser of a plurality of centre wavelengths 1064nm, accurately lock by feedback control loop and phase noise compensation technology repetition frequency and the carrier envelope phase zero-frequency to the multichannel seed pulse, make them have identical time scale window, synthetic for use in pulse coherence, and adopt low noise cascade amplifying technique and pulse compression technique to realize multiplex high power ultrashort laser comb pulse output, simultaneously, the relative time that adopts balanced type optics cross-correlation method accurately to measure between multiplex pulse is shaken, and realize the exact time synchronization of multiplex pulse by the reaction type delay control system, at last, optical frequency-doubling generation green glow is carried out in pulse to multichannel near infrared light comb, and utilize the polarization coupling technology to realize the relevant synthetic of multichannel green light pulse, and then the green glow light that obtains the broadband is combed.
As shown in Figure 1, in the present embodiment, described laser instrument 1 is the mode-locked laser that repetition frequency and pulse carrier envelope phase zero-frequency are locked by precision simultaneously, and this laser instrument is that a kind of mode-locking technique of utilizing makes pulse width reach the even laser instrument of femtosecond magnitude output of psec.
As shown in Figure 1, in the present embodiment, described frequency standard device 3 be a frequency stabilization the narrow linewidth continuous wave laser.
As shown in Figure 1, in the present embodiment, as another kind of embodiment of the present utility model, described frequency standard device 3 is a radio frequency atomic clock.
As shown in Figure 1, in the present embodiment, described nonlinear crystal 5 is BBO Crystal.
As shown in Figure 1, in the present embodiment, as another kind of embodiment of the present utility model, described nonlinear crystal 5 is periodic polarized lithium columbate crystal.
Claims (6)
1. a device that obtains high power broadband green glow optical frequency com, is characterized in that: comprise a plurality of laser instruments (1), a plurality of phase lock circuitry controller (2), frequency standard device (3), delay controller (4), a plurality of nonlinear crystal (5), the bundling device (6) that connect in turn.
2. a kind of device that obtains high power broadband green glow optical frequency com according to claim 1 is characterized in that: described laser instrument (1) for repetition frequency and pulse carrier envelope phase zero-frequency simultaneously by the mode-locked laser of accurate locking.
3. a kind of device that obtains high power broadband green glow optical frequency com according to claim 1, it is characterized in that: described frequency standard device (3) is the narrow linewidth continuous wave laser of a frequency stabilization.
4. a kind of device that obtains high power broadband green glow optical frequency com according to claim 1, it is characterized in that: described frequency standard device (3) is a radio frequency atomic clock.
5. a kind of device that obtains high power broadband green glow optical frequency com according to claim 1, it is characterized in that: described nonlinear crystal (5) is BBO Crystal.
6. a kind of device that obtains high power broadband green glow optical frequency com according to claim 5, it is characterized in that: described nonlinear crystal (5) is periodic polarized lithium columbate crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220652707 CN203012313U (en) | 2012-11-30 | 2012-11-30 | Device of optical frequency comb for acquiring high-frequency wideband green light |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220652707 CN203012313U (en) | 2012-11-30 | 2012-11-30 | Device of optical frequency comb for acquiring high-frequency wideband green light |
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| CN203012313U true CN203012313U (en) | 2013-06-19 |
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| CN 201220652707 Expired - Lifetime CN203012313U (en) | 2012-11-30 | 2012-11-30 | Device of optical frequency comb for acquiring high-frequency wideband green light |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326221A (en) * | 2013-06-25 | 2013-09-25 | 上海朗研光电科技有限公司 | Method for reinforcing frequency doubling luminous efficacy by utilizing annular optical fiber active cavity resonance |
| CN108680913A (en) * | 2018-05-17 | 2018-10-19 | 北京航天计量测试技术研究所 | Frequency modulation type signal processing method of laser radar based on femtosecond laser frequency comb calibration |
-
2012
- 2012-11-30 CN CN 201220652707 patent/CN203012313U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326221A (en) * | 2013-06-25 | 2013-09-25 | 上海朗研光电科技有限公司 | Method for reinforcing frequency doubling luminous efficacy by utilizing annular optical fiber active cavity resonance |
| CN103326221B (en) * | 2013-06-25 | 2015-07-01 | 上海朗研光电科技有限公司 | Method for reinforcing frequency doubling luminous efficacy by utilizing annular optical fiber active cavity resonance |
| CN108680913A (en) * | 2018-05-17 | 2018-10-19 | 北京航天计量测试技术研究所 | Frequency modulation type signal processing method of laser radar based on femtosecond laser frequency comb calibration |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 528400 torch 28 Yuquanlu Road, Zhongshan, Guangdong Patentee after: GUANGDONG HUAKUAI PHOTON TECHNOLOGY CO.,LTD. Address before: 528400 No. 6 Xiang Xing Road, Torch Development Zone, Guangdong, Zhongshan Patentee before: Guangdong Hantang Quantum Optoelectronics Technology Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220411 Address after: 528400 zone a, third floor, No. 28, Yuquan Road, Torch Development Zone, Zhongshan City, Guangdong Province Patentee after: GUANGDONG HUAKUAI PHOTON TECHNOLOGY CO.,LTD. Patentee after: GUANGDONG HUAYI LASER TECHNOLOGY Co.,Ltd. Address before: No. 28, Yuquan Road, Torch Development Zone, Zhongshan City, Guangdong Province, 528400 Patentee before: GUANGDONG HUAKUAI PHOTON TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |
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| CX01 | Expiry of patent term |