CN110768094A - Mode locking fiber laser based on tapered multimode fiber saturable absorber - Google Patents
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- 239000000835 fiber Substances 0.000 title claims abstract description 130
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 59
- 230000010287 polarization Effects 0.000 claims abstract description 19
- 238000005253 cladding Methods 0.000 claims abstract description 7
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 239000013307 optical fiber Substances 0.000 claims description 45
- 230000003287 optical effect Effects 0.000 claims description 10
- 230000004927 fusion Effects 0.000 claims description 2
- 238000007526 fusion splicing Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 230000002238 attenuated effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 230000009022 nonlinear effect Effects 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 229910021389 graphene Inorganic materials 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1106—Mode locking
- H01S3/1112—Passive mode locking
- H01S3/1115—Passive mode locking using intracavity saturable absorbers
- H01S3/1118—Semiconductor saturable absorbers, e.g. semiconductor saturable absorber mirrors [SESAMs]; Solid-state saturable absorbers, e.g. carbon nanotube [CNT] based
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
Abstract
The invention discloses a mode-locking fiber laser based on a tapered multimode fiber saturable absorber, which adopts an all-fiber structure and consists of a pumping source, a wavelength division multiplexer, a gain fiber, a non-polarization-maintaining isolator, a light polarization controller, a fiber coupler and a tapered multimode fiber saturable absorber. The characteristic of the saturable absorber is determined by the tapered multimode graded index fiber, due to the existence of nonlinear multimode interference effect, light of a part with strong light intensity is kept in a basic mode and is transmitted through a fiber core, while light of a part with weak light intensity deviates from the fiber core with light of a high-order mode and enters a cladding to be attenuated, so that the tapered multimode fiber has a characteristic loss relation related to the light intensity, two wings of a pulse are lost, and the peak value can pass through, thereby obtaining the ultrashort mode-locked pulse. The mode-locked pulse laser with the all-fiber structure is obtained by adopting the tapered multimode fiber saturable absorber, has the advantages of low cost, simple structure, high damage threshold value and the like, and is worthy of popularization and application.
Description
Technical Field
The invention belongs to the field of laser technology and nonlinear optics, and particularly relates to a mode-locked fiber laser based on a conical multimode fiber saturable absorber.
Background
Saturable absorbers are the most critical optical devices in passively mode-locked ultrashort pulse fiber lasers. Such a device is capable of satisfying a specific loss relationship that its optical loss becomes smaller and transmittance increases as the pulse energy passing through the device increases. At present, there are many types of saturable absorbers that have been used, such as semiconductor saturable absorbers (SESAMs), carbon nanotubes, novel two-dimensional materials represented by graphene, and equivalent saturable absorbers based on the Nonlinear Polarization Rotation (NPR) effect. However, the response time of the SESAM is relatively short, only in the order of picoseconds, and it is difficult to achieve an output in the order of femtoseconds. The output power of the laser is limited by the poor stability of saturable absorber materials such as carbon nanotubes and graphene and the low damage threshold of the materials. The saturable absorber based on NPR also has the defect of poor stability, and is suitable for being used in a laboratory environment.
Various fiber optic devices based on multi-mode interference effects have been reported in recent years, including beam shapers, sensors, filters, and the like. Since the GI multimode fiber can reduce modal dispersion and has the mode propagation constants that are equidistant, the self-focusing length of the optical signal can be very short, even less than 1mm, and therefore, the GI multimode fiber has very rich nonlinear effects (such as four-wave mixing, self-phase modulation, cross-phase modulation, and the like). At present, in the aspect of nonlinear effect, Bessel beams, supercontinuum and other applications are realized on the basis of the graded-index multimode fiber, and the applications provide theoretical support for manufacturing a saturable absorber by using the graded-index multimode fiber. Moreover, the saturable absorber made of the multimode graded index fiber, such as two-dimensional materials such as graphene and the like and the semiconductor saturable absorber mirror, is simpler in structure and high in damage threshold, and is a very reliable material for making the saturable absorber because the material of the fiber mainly comprises quartz and is not easy to age compared with other saturable absorbers.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention designs the saturable absorber with lower cost, simple structure and good stability, and provides a manufacturing method of the saturable absorber based on the tapered multimode fiber and a mode-locked fiber laser obtained by using the saturable absorber. The invention aims to solve the technical problems of the existing saturable absorber, provides a saturable absorber device with high damage threshold and low loss, and realizes a passive mode-locked fiber laser by using the saturable absorber, wherein the laser has the characteristics of low threshold power, simple structure, good stability and the like.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a mode-locked fiber laser based on a tapered multimode fiber saturable absorber is characterized by comprising a pump laser source (1), a first non-polarization-maintaining isolator (2), a fiber wavelength division multiplexer (3), a second non-polarization-maintaining isolator (4), a thulium-doped fiber (5), a light polarization controller (6), a tapered multimode fiber saturable absorber (7) and a fiber coupler (8); the pump laser source (1) is connected with a first port (201) of a first non-polarization-maintaining isolator (2), a second port (202) of the first non-polarization-maintaining isolator (2) is connected with a first port (301) of an optical fiber wavelength division multiplexer (3), a third port (303) of the optical fiber wavelength division multiplexer (3) is connected with a second non-polarization-maintaining isolator (4), the other end of the second non-polarization-maintaining isolator (4) is connected with a first port (501) of a thulium-doped optical fiber (5), a second port (502) of the thulium-doped optical fiber (5) is connected with a first port (601) of a light polarization controller (6), a second port (602) of the light polarization controller (6) is connected with a first port (701) of a saturable absorber (7) based on a tapered multimode optical fiber, a second port (702) of the saturable absorber (7) based on the tapered multimode optical fiber is connected with a first port (801) of an optical fiber coupler (8), and a second port (802) of the optical fiber coupler is connected with a second port (302) of the optical fiber wavelength division multiplexer (3), the laser light is output from the three ports (803) of the fiber coupler (8).
The saturable absorber (7) based on the tapered multimode fiber is formed by welding a single-mode fiber and a graded-index multimode fiber according to the structural modes of the single-mode fiber 1 (703), the graded-index multimode fiber (705) and the single-mode fiber 2 (704), wherein the tapered multimode fiber (705) and the single-mode fiber 2 (704) form a tapered structure (706) after being welded.
Preferably, the single mode fiber 1 (703) and the single mode fiber 2 (704) are the same single mode fiber.
Preferably, the multimode fiber (705) in the saturable absorber (7) based on the tapered multimode fiber adopts a multimode fiber with a core-to-cladding diameter ratio of 62.5 mu m/125 mu m.
Preferably, the smallest core diameter of the cone region of the cone-shaped structure (706) is less than 7 μm, and the length of the cone region is greater than 20 μm.
Preferably, the length of the graded-index multimode fiber (705) in the saturable absorber (7) based on the tapered multimode fiber is more than 15 cm.
The invention has the beneficial effects that:
1. the cone area diameter and the cone area length of the conical multimode optical fiber-based saturable absorber can be accurately controlled by adjusting specific parameters of an optical fiber fusion splicer, so that the characteristic of the saturable absorber is improved, and the saturable absorber with excellent performance is easy to manufacture;
2. the saturable absorber is simple to manufacture, has the advantages of low cost, simple structure, high efficiency, stable performance and the like, and is beneficial to popularization and application;
3. the design of the invention adopts an all-fiber structure, has the characteristics of simple manufacture, high damage threshold, good stability and the like, and is easy to obtain the ultrashort pulse mode-locked fiber laser with simple structure, lower cost, high damage threshold and good stability;
4. by reasonably designing the length of the multimode fiber, the diameter of the cone region and the length of the cone region, the saturable absorber device can realize high transmission in a wide spectral range, thereby realizing lower insertion loss.
Drawings
The invention will be further described with reference to the accompanying drawings and examples thereof:
FIG. 1 is a schematic diagram of the structure of a mode-locked fiber laser based on a tapered multimode fiber saturable absorber according to the present invention,
1 is a pump laser source; 2 is a first non-polarization-maintaining isolator; 3 is a fiber wavelength division multiplexer; 4 is a second non-polarization-maintaining isolator; 5 is thulium doped optical fiber; 6 is a light polarization controller; 7 is a saturable absorber based on a tapered multimode fiber; 8 is a fiber coupler; 201 is a first non-polarization maintaining isolator port; 202 is a second port of the first non-polarization-maintaining isolator; 301 is a port of the optical fiber wavelength division multiplexer; 302 is a second port of the optical fiber wavelength division multiplexer; 303 is a three-port of the optical fiber wavelength division multiplexer; 501 is a port of a second non-polarization-maintaining isolator; 502 is a second non-polarization maintaining isolator two-port; 601 is a port of the optical polarization controller; 602 is a second port of the optical polarization controller; 701 is a port of a saturable absorber based on nonlinear multimode interference effect; 702 is a saturable absorber two-port based on nonlinear multimode interference effect; 703 is a single mode optical fiber 1; 704 is single mode fiber 2; 705 graded index multimode fiber; 706 is a conical structure; 801 is a port of the optical fiber coupler; 802 is a fiber coupler two port; 803 is a fiber coupler three port.
FIG. 2 is a schematic diagram of a saturable absorber of a single mode fiber-tapered GI multimode fiber-single mode fiber structure.
Fig. 3 is a microscope cone image.
Fig. 4 is a saturable absorption curve.
FIG. 5 is a spectral plot of the mode-locked operational output of a laser in an embodiment of the present invention.
FIG. 6 is a pulse train diagram of the mode-locked operational output of a laser in an embodiment of the present invention.
FIG. 7 is a graph of an autocorrelation fit of the mode-locked operational output of a laser in an embodiment of the present invention.
Detailed Description
The main idea of the invention is as follows: in the adopted saturable absorber based on the tapered multimode fiber, the refractive index is changed due to nonlinear effects such as self-phase modulation and cross-phase modulation of the graded-index multimode fiber, so that the mode distribution of light with different intensities is different when the light is transmitted in the graded-index multimode fiber. Strong light will remain in the fundamental mode and propagate in the multimode fiber due to nonlinear effects, while weak light will excite higher order modes to propagate in the multimode fiber. Because the mode field distribution in the GI multimode fibers is different, the intensity of the nonlinear effect can be influenced, so that the mode field distribution of light entering the GI multimode fibers can be obviously influenced by one end of the tapered GI multimode fibers, the influence of the nonlinear effect is enhanced, the high-peak-power optical signals of laser from the GI multimode fibers to the single-mode fibers can be coupled to the fiber core of the single-mode fibers in a loss-free mode in a fundamental mode, and the low-peak-power optical signals can excite a high-order mode to enter the cladding of the single-mode fibers for attenuation. This property corresponds to a saturable absorber. As shown in fig. 1, a mode-locked fiber laser based on a tapered multimode fiber saturable absorber is characterized by comprising a pump laser source (1), a first non-polarization-maintaining isolator (2), a fiber wavelength division multiplexer (3), a second non-polarization-maintaining isolator (4), a thulium-doped fiber (5), a light polarization controller (6), a tapered multimode fiber saturable absorber (7) and a fiber coupler (8); the pump laser source (1) is connected with a first port (201) of a first non-polarization-maintaining isolator (2), a second port (202) of the first non-polarization-maintaining isolator (2) is connected with a first port (301) of an optical fiber wavelength division multiplexer (3), a second port (302) of the optical fiber wavelength division multiplexer (3) is connected with a second non-polarization-maintaining isolator (4), the other end of the second non-polarization-maintaining isolator (4) is connected with a first port (501) of a thulium-doped optical fiber (5), a second port (502) of the thulium-doped optical fiber (5) is connected with a first port (601) of a light polarization controller (6), a second port (602) of the light polarization controller (6) is connected with a first port (701) of a saturated absorber (7) based on a nonlinear multimode interference effect, a second port (702) of the saturated absorber (7) based on the nonlinear multimode interference effect is connected with a first port (801) of an optical fiber coupler (8), and a second port (802) of the optical coupler is connected with a third port (303) of the optical fiber wavelength division isolator (3), the laser light is output from the three ports (803) of the fiber coupler (8).
Example 1:
the example shows a saturable absorber based on a tapered multimode fiber, which is formed by welding a single-mode fiber and a graded-index multimode fiber according to the structural mode of the single-mode fiber 1 (703) -the graded-index multimode fiber (705) -the single-mode fiber 2 (704), wherein the tapered structure (706) is formed after the graded-index multimode fiber (705) and the single-mode fiber 2 (704) are welded, as shown in fig. 2. The cone under the microscope is shown in figure 3.
The modulation depth curve measured by a 2 mu m waveband experiment is shown in fig. 4, and characteristic parameters of the few-mode optical fiber saturable absorber can be obtained by fitting according to the formula T1-delta T x exp (-I/Isat) - α ns, wherein the modulation depth delta T is 21.15%, the saturation flux Isat is 89.04 mu J/cm2, and the unsaturated absorption loss α ns is 19.68%.
Example 2:
in the structure of the mode-locked fiber laser based on the conical multimode fiber saturable absorber, a pump laser source (1) adopts a 1570nm pump laser source, a first non-polarization-preserving isolator (2) adopts a 1570nm non-polarization-preserving isolator, and an optical fiber wavelength division multiplexer (3) adopts a 1570nm/2000nm optical fiber wavelength division multiplexer; the second non-polarization-maintaining isolator (4) adopts a 2000nm non-polarization-maintaining isolator; the thulium-doped optical fiber (5) adopts a single-cladding thulium-doped optical fiber which is manufactured by a Coractive company, has the length of 2m and the ratio of a fiber core to a cladding of 8 mu m/125 mu m; the light polarization controller (6) adopts an optical fiber ring type polarization controller; FIG. 2 is a schematic structural diagram of a saturable absorber based on a tapered multimode fiber, wherein a graded-index multimode fiber (705) manufactured by Corning corporation is used, the length of the graded-index multimode fiber is about 25cm, and the ratio of a fiber core to a cladding is 62.5 mu m/125 mu m; the core minimum diameter of the tapered structure (706) draw cone is 5.35um, and the length of the cone is about 28.2 um; the single mode optical fiber 1 and the single mode optical fiber 2 adopt single mode optical fibers with the same specification of 9 mu m/125 mu m; the fiber coupler (8) uses a 2000nm fiber coupler with a split ratio of 10:90, where 10% of the light is used as output and 90% of the light continues to oscillate in the cavity. When the pumping power reaches 117mW, 1935nm mode-locked laser is obtained by adjusting the optical polarization controller.
As shown in fig. 5 to 7, which are output results of the passive mode-locked fiber laser shown in fig. 1 when the passive mode-locked fiber laser operates stably, as shown in fig. 5, when the pumping power is 117mW, a mode-locked pulse output spectrogram of the passive mode-locked fiber laser obtained based on a tapered multimode fiber saturable absorber has an obvious Kelly sideband, which proves that the laser is output in a passive mode-locked mode, the center wavelength of the output is 1935nm, and the 3dB bandwidth is 2.1 nm; FIG. 6 is a pulse sequence chart of mode-locked output, further demonstrating the stability of the mode-locked output; fig. 7 is an autocorrelation curve of the pulse waveform tested, with a pulse width of 1.5 ps. In summary, the mode-locked fiber laser based on the tapered multimode fiber saturable absorber can realize stable ultrashort pulse output.
The above embodiment is only one of the preferable embodiments in all aspects of the present invention, and other simple changes to the structure of a 2 μm waveband multi-wavelength passive mode-locked fiber laser based on the nonlinear multimode interference effect are within the protection scope of the present invention.
Claims (6)
1. A mode-locked fiber laser based on a tapered multimode fiber saturable absorber is characterized by comprising a pumping source (1), a first non-polarization-maintaining isolator (2), a fiber wavelength division multiplexer (3), a second non-polarization-maintaining isolator (4), a gain fiber (5), a light polarization controller (6), a tapered multimode fiber saturable absorber (7) and a fiber coupler (8); the pump laser source (1) is connected with a first port (201) of a first non-polarization-maintaining isolator (2), a second port (202) of the first non-polarization-maintaining isolator (2) is connected with a first port (301) of an optical fiber wavelength division multiplexer (3), a second port (303) of the optical fiber wavelength division multiplexer (3) is connected with a second non-polarization-maintaining isolator (4), the other end of the second non-polarization-maintaining isolator (4) is connected with a first port (501) of a thulium-doped optical fiber (5), a second port (502) of the thulium-doped optical fiber (5) is connected with a first port (601) of a light polarization controller (6), a second port (602) of the light polarization controller (6) is connected with a first port (701) of a saturable absorber (7) based on a tapered multimode optical fiber, a second port (702) of the saturable absorber (7) based on the tapered multimode optical fiber is connected with a first port (801) of an optical fiber coupler (8), and a second port (802) of the optical coupler is connected with a third port (303) of the optical fiber wavelength division multiplexer (3), the laser light is output from the three ports (803) of the fiber coupler (8).
2. The tapered multimode fiber-based saturable absorber (7) of claim 1, wherein the tapered multimode fiber-based saturable absorber (7) is formed by fusion splicing single mode fiber and graded index multimode fiber according to the structure of single mode fiber 1 (703) -graded index multimode fiber (705) -single mode fiber 2 (704), wherein the tapered multimode fiber (705) is fused to the single mode fiber 2 (704) and then tapered at the fusion splice point to form the tapered structure (706).
3. The tapered structure (706) of claim 2, wherein the tapered region of the tapered structure (706) has a smallest core diameter of less than 7 μm and a length of greater than 20 μm.
4. The single mode optical fiber 1 (703) and the single mode optical fiber 2 (704) of claim 2, wherein the single mode optical fiber 1 (703) and the single mode optical fiber 2 (704) are the same single mode optical fiber.
5. The GI multimode fiber (705) according to claim 2, wherein the GI multimode fiber is a multimode fiber having a core to cladding diameter ratio of 62.5 μm/125 μm.
6. The GI multimode fiber (705) of claim 5, wherein the GI multimode fiber (705) has a length greater than 15 cm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563873A (en) * | 2020-11-24 | 2021-03-26 | 华南师范大学 | Solution of high-energy Q-switched mode-locked multimode fiber laser |
| CN112615240A (en) * | 2020-12-03 | 2021-04-06 | 重庆邮电大学 | Device and method for generating multi-pulse fiber laser |
| CN113113833A (en) * | 2021-03-02 | 2021-07-13 | 长春理工大学 | Mode-locked fiber laser based on conical SMS structure, preparation method and mode-locking method |
| CN113488834A (en) * | 2021-07-14 | 2021-10-08 | 厦门大学 | Conical gain optical fiber high repetition frequency femtosecond laser resonant cavity and laser |
| CN114188808A (en) * | 2021-11-02 | 2022-03-15 | 长春理工大学 | Harmonic mode-locked fiber laser with conical SMS structure and control method thereof |
| CN114498267A (en) * | 2022-01-27 | 2022-05-13 | 厦门大学 | Multi-wavelength high-repetition-frequency output tapered optical fiber, manufacturing method thereof and mode-locked laser |
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| US6324326B1 (en) * | 1999-08-20 | 2001-11-27 | Corning Incorporated | Tapered fiber laser |
| CN107230927A (en) * | 2017-06-29 | 2017-10-03 | 中国计量大学 | 2 μm of mode locked fiber lasers based on SMF SIMF GIMF SMF optical fiber structures |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563873A (en) * | 2020-11-24 | 2021-03-26 | 华南师范大学 | Solution of high-energy Q-switched mode-locked multimode fiber laser |
| CN112563873B (en) * | 2020-11-24 | 2022-04-26 | 华南师范大学 | Preparation method of saturable absorber and multimode fiber laser |
| CN112615240A (en) * | 2020-12-03 | 2021-04-06 | 重庆邮电大学 | Device and method for generating multi-pulse fiber laser |
| CN112615240B (en) * | 2020-12-03 | 2023-04-07 | 重庆邮电大学 | Device and method for generating multi-pulse fiber laser |
| CN113113833A (en) * | 2021-03-02 | 2021-07-13 | 长春理工大学 | Mode-locked fiber laser based on conical SMS structure, preparation method and mode-locking method |
| CN113488834A (en) * | 2021-07-14 | 2021-10-08 | 厦门大学 | Conical gain optical fiber high repetition frequency femtosecond laser resonant cavity and laser |
| CN114188808A (en) * | 2021-11-02 | 2022-03-15 | 长春理工大学 | Harmonic mode-locked fiber laser with conical SMS structure and control method thereof |
| CN114498267A (en) * | 2022-01-27 | 2022-05-13 | 厦门大学 | Multi-wavelength high-repetition-frequency output tapered optical fiber, manufacturing method thereof and mode-locked laser |
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