CN202268597U - All-normal-dispersion dissipative-type nanosecond-level passive mode-locking optical fiber laser capable of reforming - Google Patents
All-normal-dispersion dissipative-type nanosecond-level passive mode-locking optical fiber laser capable of reforming Download PDFInfo
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- CN202268597U CN202268597U CN2011203775776U CN201120377577U CN202268597U CN 202268597 U CN202268597 U CN 202268597U CN 2011203775776 U CN2011203775776 U CN 2011203775776U CN 201120377577 U CN201120377577 U CN 201120377577U CN 202268597 U CN202268597 U CN 202268597U
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Abstract
The utility model relates to an all-normal-dispersion dissipative-type nanosecond-level passive mode-locking optical fiber laser capable of reforming. The all-normal-dispersion dissipative-type nanosecond-level passive mode-locking optical fiber laser capable of reforming includes an all-normal-dispersion dissipative-type picosecond pulse generating subsystem, a pulse widening subsystem and a three-level amplifying subsystem having a filtering function. The all-normal-dispersion dissipative-type picosecond pulse generating subsystem is connected to the three-level amplifying subsystem having the filtering function through the pulse widening subsystem. The all-normal-dispersion dissipative-type nanosecond-level passive mode-locking optical fiber laser capable of reforming provided in the utility model has characteristics of high pulse energy, good heat dissipating effect, easy modulation, and simple and convenient operation. And the all-normal-dispersion dissipative-type nanosecond-level passive mode-locking optical fiber laser capable of reforming can function as a front end system for chirped pulse amplification.
Description
Technical field
The utility model belongs to optical field, relates to a kind of fiber ring laser system, but relates in particular to a kind of Totally positive dispersion dissipative type nanosecond mode locking pulse fiber laser of shaping.
Background technology
The mode locked fiber laser of nanosecond order have compact conformation, with low cost, stable performance, adjusting easy, be convenient to advantages such as coupling, in national defence, military affairs, and all there is important purposes the scientific research aspect.
Compare with traditional solid mode-locked laser, characteristic such as the chromatic dispersion of fiber laser self, non-linear and polarization state makes it have special advantages in the mode locking pulse field of lasers.Based on the dissipative type pulse of Totally positive dispersion, it forms mechanism and is different from group velocity dispersion under the conservative attitude and the soliton pulse that forms from the phase modulated balance.The soliton pulse energy receives the theoretical restriction of orphan's area, and pulse energy is limited in below the 0.1nJ.And the dissipative type pulse is based on Totally positive dispersion; Spectral filtering; And nonlinear fiber and laser interacvity gain and the coefficient result of loss; Thereby having pulse energy height, the relative broad of pulsewidth (picosecond magnitude), peak power is little, is easy to carry out broadening and receives nonlinear fiber to influence relative features of smaller.Traditional Q-switch and mode-locking pulse is based on Q switching and regulates gain and loss formation low reactance-resistance ratio stored energy in the chamber; The mode of operation that high Q value releases energy; But though the pulse of its generation does not have the coherence between nanosecond order pulse and pulse; Thereby can not carry out pulse stretching or compression, so its application is limited to.And can produce the chirped pulse of picosecond magnitude based on the mode-locked laser of Totally positive dispersion itself, through a certain amount of dispersive optical fiber broadening, just can produce the mode locking pulse of nanosecond.Through designing suitable negative dispersion device (like grating pair), just can make pulse push back very femtosecond magnitude of psec once more.In addition, through regulating the polarization state in the laser cavity, can obtain difform spectrum, because the spectrum of mode locking pulse and pulse are proper Fourier transform relations, thereby spectrum is different, and pulse shape is also just different.Based on this thought, mode-lock status that can be through regulating mode locked fiber laser and the shape that adds means control spectrum such as filter are come the characteristic of control impuls.Also there is the long cavity optical fibre laser of bibliographical information utilization to produce nanosecond pulse in recent years; But, explain that the nanosecond pulse phase place complicacy of long chamber generation can not be carried out broadening or compression with common linear dispersion device through verifying that the nanosecond pulse that this fiber laser produces is difficult to change through its characteristic of long Distance Transmission.Thereby its application also is restricted.And based on the chirped pulse that fiber laser produced of the picosecond magnitude of Totally positive dispersion through the dispersive optical fiber broadening after, its pulse characteristic and spectral characteristic strictness are satisfied Fourier transform and are concerned.Big warble that to guarantee that mode locking pulse is influenced by nonlinear fiber little, high output energy guarantees that pulse also has enough dump energies through long dispersive optical fiber.
The utility model content
In order to solve the above-mentioned technical problem that exists in the background technology, but the utility model provides a kind of pulse energy height, good heat dissipation effect, is easy to regulate, the easy and simple to handle and passive mode-locking fiber laser that can be used as the Totally positive dispersion dissipative type nanosecond pulse shaping of the front end system that chirped pulse amplifies.
The technical solution of the utility model is: but the utility model provides the passive mode-locking fiber laser of a kind of Totally positive dispersion dissipative type nanosecond pulse shaping, and its special character is: but the passive mode-locking fiber laser of said Totally positive dispersion dissipative type nanosecond pulse shaping comprises three grades of amplification subsystems that Totally positive dispersion dissipative type picopulse produces subsystem, pulse stretching subsystem and has filter function; Said Totally positive dispersion dissipative type picopulse produces subsystem and inserts three grades of amplification subsystems that have filter function through the pulse stretching subsystem.
Above-mentioned Totally positive dispersion dissipative type picopulse produces the relevant isolator of semiconductor pumped light source, wavelength division multiplexer, Yb dosed optical fiber, polarization, output coupler, Polarization Controller and the optical filter that subsystem comprises the optical fiber coupling; The semiconductor pumped light source of said optical fiber coupling produces pump light; The pump light that semiconductor pumped light source produced of said optical fiber coupling injects Yb dosed optical fiber through wavelength division multiplexer; Be correlated with isolator, output coupler, Polarization Controller and optical filter of said polarization connects successively; Said optical filter inserts wavelength division multiplexer.
Above-mentioned Yb dosed optical fiber is the optical fiber of Yb164; The frequency division scope of said wavelength division multiplexer is 980nm/1053nm; The output ratio of said output coupler is 30%; The operation wavelength of said semiconductor pumped light source is the single mode semiconductor laser of 976nm, and its power output is 0-250mW; Said filter is 1064 ± 5nm filter; Adopt HI 1060 optical fiber to connect between said semiconductor pumped light source, wavelength division multiplexer, Yb dosed optical fiber, the relevant isolator of polarization, output coupler, Polarization Controller and the optical filter.
Above-mentioned pulse stretching subsystem is G 652 standard single-mode fibers; Said output coupler inserts G 652 standard single-mode fibers.
Above-mentioned three grades of having filter function amplify subsystem and comprise pump laser, first beam splitter, second beam splitter, first wavelength division multiplexer, first gain fibre, second wavelength division multiplexer, second gain fibre, the 3rd wavelength division multiplexer, the 3rd gain fibre, polarization irrelevant isolator and filter; Said G 652 standard single-mode fibers insert first beam splitter; Said pump laser inserts first wavelength division multiplexer and second beam splitter respectively through first beam splitter; Said first wavelength division multiplexer inserts second wavelength division multiplexer through first gain fibre; Said pump laser inserts second wavelength division multiplexer and the 3rd wavelength division multiplexer respectively after inserting second beam splitter through first beam splitter; Said second wavelength division multiplexer inserts the 3rd wavelength division multiplexer through second gain fibre; Said the 3rd wavelength division multiplexer links to each other with the polarization irrelevant isolator through the 3rd gain fibre; Said polarization irrelevant isolator inserts filter.
The beam splitting ratio of above-mentioned first beam splitter is 70: 30; The beam splitting ratio of said second beam splitter is 60: 40; Said pump laser is the 980nm pump laser; Said filter is 1064 ± 4nm filter; The absorption coefficient of said gain fibre is 20dB/m.
The utility model has the advantages that:
But the utility model provides the passive mode-locking fiber laser of a kind of Totally positive dispersion dissipative type nanosecond pulse shaping, and this system comprises that Totally positive dispersion dissipative type mode locking pulse produces subsystem A, broadening subsystem B, tertiary vein with filtering characteristic dashes and amplifies subsystem C; Totally positive dispersion dissipative type mode locking pulse produces subsystem A and connects broadening subsystem B, gets into the tertiary vein with filtering characteristic afterwards and dashes amplification subsystem C.The dissipative type pulse of the used seed light source of this fiber ring laser system for being produced based on the Totally positive dispersion passive mode-locking fiber laser of spectral filtering effect has linear chrip, and pulsewidth is at picosecond magnitude, pulse energy high (greater than 1nJ); Simultaneously, this Optical Maser System adopts all optical fibre structure, and conversion efficiency is high, good beam quality, and good heat dissipation effect is easy to and other device couplings; The 3rd, this Optical Maser System is easy to regulate, and is easy and simple to handle; The 4th, this Optical Maser System utilizes G 652 monomode fibers of standard communication band to carry out broadening, low price, and effect is obvious, and is higher than HI-1060 optical fiber cost performance; The 5th; Three grades of this laser are amplified subsystem and can original weak signal (microwatt magnitude) be amplified 1000 times (milliwatt magnitude); It is high to amplify efficient, and has filter function, not only can be good at suppressing the spontaneous radiation background noise; Can also effectively carry out the second pulse shaping, make that the pulse of being exported more can be near user's needs.The 6th, this Optical Maser System can be used as the front end system that chirped pulse amplifies.
Description of drawings
Fig. 1 is the structural representation of the fiber laser that provides of the utility model;
Fig. 2 is the detailed structure sketch map of included three sub-systems of the utility model.
Wherein:
The semiconductor pumped light source of 1-; The 2-wavelength division multiplexer; The 3-Yb dosed optical fiber; The 4-polarization isolator of being correlated with; The 5-output coupler; The 6-Polarization Controller; The 7-optical filter; Optical fiber is used in the communication of 8-standard; 9-first beam splitter; 10-second beam splitter; The 11-pump laser; 12-first wavelength division multiplexer; 13-first gain fibre; 14-second wavelength division multiplexer; 15-second gain fibre; 16-the 3rd wavelength division multiplexer; 17-the 3rd gain fibre; 18-polarization irrelevant isolator; The 19-filter.
Embodiment
Referring to Fig. 1, the generation nanosecond Totally positive dispersion dissipative type mode locking pulse novel optical fiber laser that the utility model provides comprises: Totally positive dispersion dissipative type mode locking pulse generation subsystem A, the pulse stretching subsystem B that connects through light path successively, the tertiary vein with filtering characteristic dash and amplify subsystem C.
Totally positive dispersion dissipative type picopulse produces the pulse that subsystem A excitation pulse broadening subsystem B produces nanosecond order; Having three grades of filter function amplifies subsystem C the pulse of the nanosecond order that is produced is amplified to power demand and pulse energy.
Referring to Fig. 2, wherein Totally positive dispersion dissipative type mode locking pulse generation subsystem A comprises the relevant isolator 4 of semiconductor pumped light source 1, wavelength division multiplexer 2, Yb dosed optical fiber 3, polarization of optical fiber coupling, 70: 30 output couplers 5, Polarization Controller 6, optical filters 7 and HI 1060 optical fiber that are used to connect.The pump light of pump light source 1 injects Yb dosed optical fiber 3 through wavelength division multiplexer 2; Spontaneous emission light that is inspired (ASE) and remnant pump light get into the relevant isolator 4 of polarization to produce linearly polarized light; Get into output coupler 5; 70% port gets into Polarization Controller 6, to change polarization state of light, passes through optical filter 7 again, circulates once more through wavelength division multiplexer 2 at last.Wherein the Yb dosed optical fiber model is the optical fiber of Yb164 for the model that CorActive company produces, and length is 0.8m, only uses a Polarization Controller in the resonant cavity; After output coupler, link to each other with 1064 ± 5nm filter; The frequency division scope of wavelength division multiplexer is 980nm/1053nm; The output ratio of output coupler is 30%; The pump light source operation wavelength is the single mode semiconductor laser of 976nm, and power output is 0-250mW; The HI-1060 optical fiber length overall 13.21m that constitutes laser resonant cavity comprises device tail optical fiber and used optical fiber.
Light produces repetition rate and the long relevant chirped pulse in chamber through the nonlinear polarization rotation effect.Can obtain the output characteristic of seed light source through spectrometer and autocorrelation function analyzer.Under mode-lock status, can change the spectral characteristic of locked mode, also just corresponding the pulse characteristic that has changed locked mode through careful adjusting Polarization Controller 4.
The Polarization Controller that Totally positive dispersion dissipative type mode locking pulse produces in the subsystem can change spectral characteristic and corresponding output pulse waveform.
Mode locking pulse is injected among the broadening subsystem B, comprise that 25km G 652 standard communications are with optical fiber 8.The pulse of being exported is at nanosecond order.Can be clear that through high-speed oscilloscope the pulse wave of nanosecond order and the spectrum behind the broadening are the Fourier transform relation.
The tertiary vein that has filter function dashes amplification subsystem C and comprises that splitting ratio is respectively first beam splitter 9 and second beam splitter 10,980nm pump laser 300mW 11, the first wavelength division multiplexers 12; First gain fibre, 13, the second wavelength division multiplexers, 14, the second gain fibres 15; The 3rd wavelength division multiplexer 16; The 3rd gain fibre 17, polarization irrelevant isolator 18,1064 ± 4nm filter 19.The nanosecond mode locking pulse of output inserts the tertiary vein with filtering characteristic through first wavelength division multiplexer 12 and dashes amplification subsystem C.980nm pump laser 300mW 11 is divided into three pumping different capacities through two beam splitters, is connected through 30% port, 70%-40% port, 70%-60% port and first wavelength division multiplexer 12, second wavelength division multiplexer 14, the 3rd wavelength division multiplexer 16 wavelength division multiplexers respectively.Pump light and flashlight get into first gain fibre 13 through first wavelength division multiplexer 12; Amplifying signal gets into second gain fibre 15 with second pump light through second wavelength division multiplexer 14 afterwards; Amplifying signal and the 3rd pump light get into the 3rd gain fibre 17 through the 3rd wavelength division multiplexer 16 once more; The amplifying signal of being exported gets into filter 19 through polarization irrelevant isolator 18, at last output.The gain fibre absorption coefficient is 20dB/m, and the tertiary vein with filtering characteristic dashes and amplifies the used pump light source of subsystem through 70: 30, and two beam splitters of 60: 40 are divided into the pumping end of three grades of amplifications.
Totally positive dispersion dissipative type picopulse produces subsystem, increases spectrum width with pump power and increases the also linear increase of pulse duration.Under the 200mW pump power, directly export 15mW.Can adjust different locked mode spectrum through polarization state in the change chamber.Behind the broadening subsystem, be output as the nanosecond mode locking pulse, power output 150 μ W.Tertiary vein through having filtering characteristic dashes and amplifies after the subsystem, and pulse is further by shaping, power output 18mW.Also can further amplify as required.
Claims (6)
1. but the passive mode-locking fiber laser of Totally positive dispersion dissipative type nanosecond pulse shaping is characterized in that: amplify subsystems but the passive mode-locking fiber laser of said Totally positive dispersion dissipative type nanosecond pulse shaping comprises that Totally positive dispersion dissipative type picopulse produces subsystem, pulse stretching subsystem and has three grades of filter function; Said Totally positive dispersion dissipative type picopulse produces subsystem and inserts three grades of amplification subsystems that have filter function through the pulse stretching subsystem.
2. but the passive mode-locking fiber laser of Totally positive dispersion dissipative type nanosecond pulse according to claim 1 shaping is characterized in that: said Totally positive dispersion dissipative type picopulse produces the relevant isolator of semiconductor pumped light source, wavelength division multiplexer, Yb dosed optical fiber, polarization, output coupler, Polarization Controller and the optical filter that subsystem comprises the optical fiber coupling; The semiconductor pumped light source of said optical fiber coupling produces pump light; The pump light that semiconductor pumped light source produced of said optical fiber coupling injects Yb dosed optical fiber through wavelength division multiplexer; Be correlated with isolator, output coupler, Polarization Controller and optical filter of said polarization connects successively; Said optical filter inserts wavelength division multiplexer.
3. but the passive mode-locking fiber laser of Totally positive dispersion dissipative type nanosecond pulse according to claim 2 shaping is characterized in that: said Yb dosed optical fiber is the optical fiber of Yb164; The frequency division scope of said wavelength division multiplexer is 980nm/1053nm; The output ratio of said output coupler is 30%; The operation wavelength of said semiconductor pumped light source is the single mode semiconductor laser of 976nm, and its power output is 0-250mW; Said filter is 1064 ± 5nm filter; Adopt HI 1060 optical fiber to connect between said semiconductor pumped light source, wavelength division multiplexer, Yb dosed optical fiber, the relevant isolator of polarization, output coupler, Polarization Controller and the optical filter.
4. but according to the passive mode-locking fiber laser of claim 2 or 3 described Totally positive dispersion dissipative type nanosecond pulse shapings, it is characterized in that: said pulse stretching subsystem is G 652 standard single-mode fibers; Said output coupler inserts G 652 standard single-mode fibers.
5. but the passive mode-locking fiber laser of Totally positive dispersion dissipative type nanosecond pulse according to claim 4 shaping is characterized in that: said three grades of having filter function amplify subsystem and comprise pump laser, first beam splitter, second beam splitter, first wavelength division multiplexer, first gain fibre, second wavelength division multiplexer, second gain fibre, the 3rd wavelength division multiplexer, the 3rd gain fibre, polarization irrelevant isolator and filter; Said G 652 standard single-mode fibers insert first beam splitter; Said pump laser inserts first wavelength division multiplexer and second beam splitter respectively through first beam splitter; Said first wavelength division multiplexer inserts second wavelength division multiplexer through first gain fibre; Said pump laser inserts second wavelength division multiplexer and the 3rd wavelength division multiplexer respectively after inserting second beam splitter through first beam splitter; Said second wavelength division multiplexer inserts the 3rd wavelength division multiplexer through second gain fibre; Said the 3rd wavelength division multiplexer links to each other with the polarization irrelevant isolator through the 3rd gain fibre; Said polarization irrelevant isolator inserts filter.
6. but the passive mode-locking fiber laser of Totally positive dispersion dissipative type nanosecond pulse according to claim 5 shaping is characterized in that: the beam splitting ratio of said first beam splitter is 70: 30; The beam splitting ratio of said second beam splitter is 60: 40; Said pump laser is the 980nm pump laser; Said filter is 1064 ± 4nm filter; The absorption coefficient of said gain fibre is 20dB/m.
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| CN2011203775776U CN202268597U (en) | 2011-09-28 | 2011-09-28 | All-normal-dispersion dissipative-type nanosecond-level passive mode-locking optical fiber laser capable of reforming |
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| CN2011203775776U CN202268597U (en) | 2011-09-28 | 2011-09-28 | All-normal-dispersion dissipative-type nanosecond-level passive mode-locking optical fiber laser capable of reforming |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022861A (en) * | 2011-09-28 | 2013-04-03 | 中国科学院西安光学精密机械研究所 | Shaped full positive dispersion dissipative nanosecond pulse passive mode-locking fiber laser system |
| CN111082295A (en) * | 2019-12-31 | 2020-04-28 | 陕西师范大学 | Mode-locked pulse light source based on hydrazone organic matter and preparation method |
-
2011
- 2011-09-28 CN CN2011203775776U patent/CN202268597U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022861A (en) * | 2011-09-28 | 2013-04-03 | 中国科学院西安光学精密机械研究所 | Shaped full positive dispersion dissipative nanosecond pulse passive mode-locking fiber laser system |
| CN103022861B (en) * | 2011-09-28 | 2015-10-21 | 中国科学院西安光学精密机械研究所 | Totally positive dispersion dissipative type nanosecond pulse can the passive mode-locking fiber laser system of shaping |
| CN111082295A (en) * | 2019-12-31 | 2020-04-28 | 陕西师范大学 | Mode-locked pulse light source based on hydrazone organic matter and preparation method |
| CN111082295B (en) * | 2019-12-31 | 2021-08-06 | 陕西师范大学 | Mode-locked pulse light source based on hydrazone organic matter and preparation method |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120606 Effective date of abandoning: 20151021 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120606 Effective date of abandoning: 20151021 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |