CN101986483A - Passive mode-locked pulsed laser - Google Patents
Passive mode-locked pulsed laser Download PDFInfo
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- CN101986483A CN101986483A CN2010102990760A CN201010299076A CN101986483A CN 101986483 A CN101986483 A CN 101986483A CN 2010102990760 A CN2010102990760 A CN 2010102990760A CN 201010299076 A CN201010299076 A CN 201010299076A CN 101986483 A CN101986483 A CN 101986483A
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Abstract
The invention provides a passive mode-locked pulsed laser which simultaneously outputs two or more optical pulses with different wavelength. Under the condition that an optical resonant cavity does not contain an optical filter with two or more transmittance peaks in the gain spectrum of a gain medium, the laser ensures two or more gain peaks of the gain medium to simultaneously have maximum and equal gains by reasonably controlling the loss in the optical resonant cavity and further simultaneously outputs two or more optical pulses with different center wavelength.
Description
Technical field
The present invention relates to laser passive mode locking technical field, be specifically related to export simultaneously the passive mode locking pulse laser of the light pulse of two or more different wave lengths.
Background technology
The multi-wavelength pulse laser can be exported the light pulse of two wavelength simultaneously, therefore can be used for Fibre Optical Sensor, wavelength-division multiplex system, optical device measurement and light signal processing etc.Up to the present, no matter the multi-wavelength mode-locked laser of being reported in the world is active mode locking or passive mode locking, all is to have a plurality of filter function devices that see through the peak by adding in optical cavity to realize multiple-pulse output.
Yao of Nanyang Technolohy University builds the equality people has realized active mode locking by the method that adds the sampling Fiber Bragg Grating FBG in optical cavity multi-wavelength optical fiber laser.
The Lou Caiyun of Tsing-Hua University etc. utilizes the nonlinear birefringence effect in the distributed dispersive optical fiber chamber, produces the method for comb filter, has realized active mode locking simultaneously at four equally spaced wavelength places.
People such as the Xu Zhengde of Hong Kong Chinese University adopt the method for two Fiber Bragg Grating FBG cascades to realize the active mode locking laser of dual wavelength.
People such as Pan's rhinoceros spirit of Taiwan National Chiao Tung University have realized the active mode locking laser of two wavelength by adding grating and be used for the method for v shape two waveband speculum of filtering in the chamber.
People such as the Luo Aiping of South China Normal University utilize the nonlinear polarization rotation effect in the chamber to realize laser with active-passive lock mould, utilize the formed comb filter of birefringence in the chamber simultaneously, have realized multi-wavelength pulse locked mode simultaneously.
People such as the Tang Dingyuan of Nanyang Technolohy University are in the laser with active-passive lock mould of semiconductor saturated absorption mirror as the locked mode device, utilize the birefringence and the polarization dependent behavior of device in the chamber, produce the comb filtering effect, realized the soliton pulse output of dual wavelength and three-wavelength.
Multi-wavelength active-passive locking mode laser listed above is all to be a plurality of pass filters that utilize in the optical cavity, or a plurality of pass filters that utilize birefringence effect to form, realization multi-wavelength locked mode.Up to now, the tuning method of multi-wavelength passive mode locking pulse laser that realizes of optical cavity internal loss of utilizing proposed by the invention yet there are no report.
Summary of the invention
The invention provides a kind of passive mode locking pulse laser of exporting two or more different wave length light pulses simultaneously.Laser of the present invention is not included in optical cavity under the situation that has two or more optical filters that see through the peak or optical filter group in the gain spectral scope of gain media, make two or more gain peak of gain media have maximum gain and equal simultaneously by the loss in the reasonable control chamber, and then the light pulse of exporting two or more different wave lengths simultaneously.Optical filter or optical filter group can be common filters such as one or more Fiber Bragg Grating FBGs, perhaps have the optical device or the set of devices of similar filter effect, as since optical cavity in the formed comb filter of birefringence effect.
Laser of the present invention is made up of pumping source, optical cavity and the gain media, passive mode locking device, coupling output device and the variable optical attenuator spare that are positioned at optical cavity.
Pumping source of the present invention is made of pump light source and pump light coupled apparatus, and its effect is for optical cavity provides pump light, and is coupled in the optical cavity.Pump light source can be semiconductor light sources, dyestuff light source, solid light source and gas lamp etc.The pump light coupled apparatus mainly comprises two-phase look mirror, or has the film of two-phase look mirror characteristic, and the wavelength division multiplex device in the optical fiber etc.
Gain media of the present invention also claims working-laser material, comprise semiconductor, crystal, rare earth material doped-glass and rare earth material doped fiber with the level structure that is complementary with the pump light source emission spectra, these materials can be excited the generation stimulated radiation by pump light source.Relatively Chang Yong gain media has ruby crystal, neodymium glass, Er-doped fiber, Yb dosed optical fiber and erbium-ytterbium co-doped fiber etc.
The characteristics of gain media of the present invention are to have two or more gain peak.
Passive mode locking device of the present invention is the main devices in the optical cavity, and its effect is not need the optical cavity external modulation, utilizes the nonlinear characteristic of passive mode locking device itself to realize each longitudinal mode phase locking in the optical cavity.
Passive mode locking device of the present invention comprises device, carbon nano-tube material and the nonlinear fiber loop mirror that semiconductor device, the photon crystal device with saturated absorption characteristic, the optical fiber with nonlinear polarization rotation effect and polarization related elements constitute.Wherein the polarization related elements comprises polarization beam splitting device or the relevant isolating device of polarization etc.Carbon nano-tube material can be the pure nano-carbon tube material, it also can be the composite material that carbon nano-tube and high molecular polymer form, carbon nano-tube can be dispersed in the described macromolecular material, more common macromolecular material has Merlon, polyimides, polyethylene, polyvinyl alcohol, polymethyl methacrylate and dimethyl silicone polymer etc.
The effect of coupling output device of the present invention is that a part of light of optical cavity internal fixation ratio is exported outside the optical cavity, in the remainder beam split back light resonant cavity.The coupling output device can be outgoing mirror, beam splitter and the fiber coupler etc. with certain transmitance.The coupling output device need be selected suitable transmitance or splitting ratio according to conditions such as gain in the optical cavity and losses.
Variable optical attenuator spare of the present invention, its effect provide the humorous light decay depreciation of adjustable size, change cavity loss, and then change the relative size of each wavelength gain.
The one-way optical fiber chamber that optical cavity of the present invention can be made up of optical fiber and isolator or by each
The passive mode locking pulse laser that the present invention proposes can be realized two and two above different wave length pulse outputs at the same time or separately, and this laser has the following advantages:
1. laser provided by the present invention does not have in the chamber under the situation that has two or more optical filters that see through the peak in the gain spectral scope of gain media, can realize the pulse of two and two above different wave length outputs simultaneously by the loss in the control optical cavity; Can realize also that by the size that changes optical cavity internal loss amount each wavelength pulse exports separately, and the switching of finishing different wave length pulse output.
2. laser proposed by the invention simple in structure, compare single wavelength laser with active-passive lock mould structure, the present invention has only added the adjustable damping device in optical cavity, one side has been avoided involving great expense, baroque filtering device, makes whole with low cost; The adding of attenuator does not change conditions such as polarization in the laserresonator and chromatic dispersion substantially on the other hand, helps keeping the stability of optical cavity.
3. laser operation proposed by the invention is simple, realizes easily, and stability is high, favorable repeatability.Finish locked mode at optical cavity, after the output stable pulse, need only change cavity loss just can finish output pulse by single wavelength to a plurality of wavelength, a plurality of wavelength are to single wavelength, and the mutual switching between each single wavelength, in good reproducibility, avoided in the complicated adjustment process destruction again to mode-lock status in the chamber.
Description of drawings
Fig. 1 is a passive mode locking pulse laser structural representation.Wherein 1 is pumping source, 2 is gain media, 3 is the passive mode locking device, 4 is tunable attenuation device, and 5 are the coupling output device, and 6 is optical cavity, each device position in optical cavity can be changed, but pumping source is adjacent with gain media, guarantees that its pump light that produces without other device, directly is coupled into gain media.
Fig. 2 is the structure chart of dual wavelength passive mode locking pulse laser.Wherein 1 is the 980nm semiconductor laser, and 2 is the 980nm/1550nm wavelength division multiplexer, and 3 is Er-doped fiber, 4 is optical isolator, and 5 is Polarization Controller, and 6 is general single mode fiber, 7 is carbon nano tube/polyamide 6 imines composite material film, and 8 is fiber coupler, and 9 is variable optical attenuator.
Fig. 3 is the output spectrum figure of the centre wavelength of mode-locked laser locked mode when being 1558nm.
Fig. 4 is the output spectrum figure of the centre wavelength of mode-locked laser locked mode when being 1532nm.
The output spectrum figure that Fig. 5 is a mode-locked laser when centre wavelength 1532nm and 1557nm realize locked mode simultaneously.
When Fig. 6 is dual wavelength locked mode output simultaneously, time domain waveform figure and the autocorrelator trace of output light filtered 1532nm of process outside optical fiber cavity.Wherein a represents time domain waveform figure, and b represents autocorrelator trace.
When Fig. 7 is dual wavelength locked mode output simultaneously, time domain waveform figure and the autocorrelator trace of output light filtered 1557nm of process outside optical fiber cavity.Wherein a represents time domain waveform figure, and b represents autocorrelator trace.
Embodiment
In the present embodiment, pumping source comprises as the 980nm semiconductor laser of pump light source with as the 980nm/1550nm wavelength division multiplexer of pump light coupled apparatus, optical cavity is the unidirectional loop chamber that is made of optical fiber and fibre optic isolater, device in the optical cavity comprises the Er-doped fiber as gain media, carbon nano tube/polyamide 6 imines composite material film as the passive mode locking device, fiber coupler, variable optical attenuator and Polarization Controller as the coupling output device.
The absorption coefficient of Er-doped fiber at the 1530nm place is 6.1dB/m, and the GVD (Group Velocity Dispersion) at the 1550nm place is-6.5ps/km/nm that length is 4.5m.
Single Walled Carbon Nanotube/composite polyimide material film has the saturated absorption characteristic, and wherein the mixed proportion of carbon nano-tube and polyimide material is 1: 100, and the polymer thin film thickness is 0.045mm, the about 2.3dB of its loss at the 1550nm place.
The splitting ratio of fiber coupler is 1: 9, promptly has 10% light to output to outside the optical cavity, and 90% optical coupling enters in the optical cavity.
Single-mode optical fiber length in the optical cavity is 18.3m.
The effect of Polarization Controller is the polarization state of control chamber inner laser, by the adjusting of polarization in the chamber being realized the locked mode of pulsed light.
When the loss value of variable optical attenuator is 0dB, by regulating Polarization Controller, can realize single wavelength locked mode, centre wavelength is 1558.5nm, measures the spectrum of exporting light this moment, as shown in Figure 3, spectrum width is 3nm.
When the loss value of variable optical attenuator is 3dB, by regulating Polarization Controller, can realize single wavelength locked mode, centre wavelength is 1532.2nm, measures the spectrum of exporting light this moment, as shown in Figure 4, spectrum width is 2.7nm.
When the loss value of variable optical attenuator was 2.2dB, laser can be realized the dual wavelength locked mode of 1532nm and 1557nm simultaneously, and measured spectrum as shown in Figure 5.Wherein, the spectrum width of 1532nm wave band pulsed light is 3.3nm, and the spectrum width of 1557nm wave band pulsed light is 3.8nm.
With this output light is 1532.5nm and 1558.2nm through centre wavelength respectively, and bandwidth is the filter of 8nm, and with oscilloscope measurement time domain waveform figure, autocorrelation function analyzer is measured the autocorrelator trace of pulse.Accompanying drawing 6 is the measurement result that obtains behind the filter of 1532.5nm through centre wavelength for double-wavelength pulse.Accompanying drawing 7 is the measurement result that obtains behind the filter of 1558.2nm through centre wavelength for double-wavelength pulse.The repetition rate of two wavelength light pulses is all near 9.09MHz; The pulse duration of 1532nm is 0.99ps, and the pulse duration of 1557nm is 0.946ps.
It should be noted that embodiment in above each accompanying drawing at last only in order to the passive mode locking pulse laser of exporting the light pulse of two or more different wave lengths simultaneously of the present invention to be described, but unrestricted.Although the present invention is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1. passive mode locking pulse laser, form by pumping source, optical cavity and the gain media, passive mode locking device, coupling output device and the variable optical attenuator spare that are positioned at optical cavity, be not included in the optical cavity and have optical filter or the optical filter group that two or more see through the peak in the gain spectral scope of gain media, gain media has two or more gain peak, by regulating the attenuation of variable optical attenuator spare, make the amplitude of above-mentioned each gain peak all equate the light pulse of exporting two or more different wave lengths simultaneously.
2. laser according to claim 1 is characterized in that, pumping source is made of pump light source and pump light coupled apparatus, and effect is for optical cavity provides pump light, and pump light is coupled in the optical cavity.
3. pumping source according to claim 2 is characterized in that, pump light source comprises semiconductor light sources, dyestuff light source, solid light source and gas lamp.
4. laser according to claim 1 is characterized in that, gain media comprises semiconductor, crystal, rare earth material doped-glass and the rare earth material doped fiber with the level structure that is complementary with the pump light source emission spectra.
5. laser according to claim 1, it is characterized in that the passive mode locking device comprises device, carbon nano-tube material and the nonlinear fiber loop mirror that semiconductor device, the photon crystal device with saturated absorption characteristic, the optical fiber with nonlinear polarization rotation effect and polarization related elements constitute.
6. laser according to claim 1, it is characterized in that, the effect of coupling output device is that a part of light with chamber internal fixation ratio outputs to outside the optical cavity, and in the remainder beam split back light resonant cavity, the coupling output device comprises fiber coupler and beam splitter.
7. laser according to claim 1 is characterized in that, the effect of variable optical attenuator spare provides the humorous light decay depreciation of adjustable size, changes cavity loss, and then changes the relative size of each wavelength gain.
8. laser according to claim 1 is characterized in that, optical cavity comprises line style chamber, refrative cavity, annular chamber and figure of eight chamber.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790349A (en) * | 2012-07-30 | 2012-11-21 | 北京航空航天大学 | Multi-wavelength passively Q-switched laser |
| CN103326222A (en) * | 2013-06-28 | 2013-09-25 | 中国科学院西安光学精密机械研究所 | Controllable dual-wavelength mode locking pulse fiber laser device |
| CN104064942A (en) * | 2014-06-05 | 2014-09-24 | 北京航空航天大学 | Dual-repetition-frequency short-pulse laser system |
| CN104836104A (en) * | 2015-05-26 | 2015-08-12 | 扬州大学 | Compression fiber laser self-locking mode pulse composition |
| CN105514773A (en) * | 2015-12-10 | 2016-04-20 | 深圳市无牙太赫兹科技有限公司 | Dual-wavelength fiber laser and working method thereof |
| CN106058638A (en) * | 2016-06-01 | 2016-10-26 | 中国科学院半导体研究所 | Mode-locked laser for outputting femtosecond pulse |
| CN107800035A (en) * | 2017-11-14 | 2018-03-13 | 北京信息科技大学 | A kind of changeable mode-locked fiber lasers device of wavelength |
| CN110165537A (en) * | 2019-05-22 | 2019-08-23 | 中国计量大学 | A kind of tunable wave length passive mode-locking fiber laser based on loss control |
| CN111595365A (en) * | 2020-07-06 | 2020-08-28 | 山东省科学院激光研究所 | Multi-wavelength laser for synchronously monitoring ocean temperature and pressure |
| CN111711057A (en) * | 2019-11-28 | 2020-09-25 | 北京交通大学 | Synchronous spectrum-overlapped multi-wavelength pulse laser |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595736A (en) * | 2004-06-25 | 2005-03-16 | 南开大学 | Convertible dual-wavelength doping optical fiber laser |
| US20050078716A1 (en) * | 2003-10-14 | 2005-04-14 | Jian Liu | Fast continuously wavelength tuning single frequency fiber laser using tunable polymer optical filters |
| WO2010024264A1 (en) * | 2008-09-01 | 2010-03-04 | セントラル硝子株式会社 | Fiber ring laser and fiber ring laser gyro using the same |
-
2010
- 2010-10-08 CN CN2010102990760A patent/CN101986483A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050078716A1 (en) * | 2003-10-14 | 2005-04-14 | Jian Liu | Fast continuously wavelength tuning single frequency fiber laser using tunable polymer optical filters |
| CN1595736A (en) * | 2004-06-25 | 2005-03-16 | 南开大学 | Convertible dual-wavelength doping optical fiber laser |
| WO2010024264A1 (en) * | 2008-09-01 | 2010-03-04 | セントラル硝子株式会社 | Fiber ring laser and fiber ring laser gyro using the same |
Non-Patent Citations (1)
| Title |
|---|
| 刘东峰 等: "掺Er3+光纤环腔激光器的初步研究", 《光子学报》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790349A (en) * | 2012-07-30 | 2012-11-21 | 北京航空航天大学 | Multi-wavelength passively Q-switched laser |
| CN103326222A (en) * | 2013-06-28 | 2013-09-25 | 中国科学院西安光学精密机械研究所 | Controllable dual-wavelength mode locking pulse fiber laser device |
| CN104064942A (en) * | 2014-06-05 | 2014-09-24 | 北京航空航天大学 | Dual-repetition-frequency short-pulse laser system |
| CN104064942B (en) * | 2014-06-05 | 2018-03-16 | 北京航空航天大学 | A kind of dual complex frequency short pulse laser system |
| CN104836104B (en) * | 2015-05-26 | 2017-10-10 | 扬州大学 | Compress the structure of optical fiber laser self-locking mode pulse |
| CN104836104A (en) * | 2015-05-26 | 2015-08-12 | 扬州大学 | Compression fiber laser self-locking mode pulse composition |
| CN105514773A (en) * | 2015-12-10 | 2016-04-20 | 深圳市无牙太赫兹科技有限公司 | Dual-wavelength fiber laser and working method thereof |
| CN105514773B (en) * | 2015-12-10 | 2018-12-21 | 华讯方舟科技有限公司 | A kind of dual wavelength fibre laser and its working method |
| CN106058638A (en) * | 2016-06-01 | 2016-10-26 | 中国科学院半导体研究所 | Mode-locked laser for outputting femtosecond pulse |
| CN107800035A (en) * | 2017-11-14 | 2018-03-13 | 北京信息科技大学 | A kind of changeable mode-locked fiber lasers device of wavelength |
| CN110165537A (en) * | 2019-05-22 | 2019-08-23 | 中国计量大学 | A kind of tunable wave length passive mode-locking fiber laser based on loss control |
| CN111711057A (en) * | 2019-11-28 | 2020-09-25 | 北京交通大学 | Synchronous spectrum-overlapped multi-wavelength pulse laser |
| CN111711057B (en) * | 2019-11-28 | 2021-08-24 | 北京交通大学 | Synchronous spectrum-overlapped multi-wavelength pulse laser |
| CN111595365A (en) * | 2020-07-06 | 2020-08-28 | 山东省科学院激光研究所 | Multi-wavelength laser for synchronously monitoring ocean temperature and pressure |
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