CN112886373A - Dual-waveband high-energy rectangular laser pulse generation system with all-fiber structure - Google Patents

Dual-waveband high-energy rectangular laser pulse generation system with all-fiber structure Download PDF

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CN112886373A
CN112886373A CN202110040106.4A CN202110040106A CN112886373A CN 112886373 A CN112886373 A CN 112886373A CN 202110040106 A CN202110040106 A CN 202110040106A CN 112886373 A CN112886373 A CN 112886373A
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fiber
division multiplexer
wavelength division
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band high
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李和平
王壮
杜文雄
李俊文
张旨遥
刘永
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University of Electronic Science and Technology of China
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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
    • H01S3/05—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
    • H01S3/06716—Fibre compositions or doping with active elements
    • 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
    • H01S3/06725—Fibre characterized by a specific dispersion, e.g. for pulse shaping in soliton lasers or for dispersion compensating [DCF]
    • 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
    • H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] 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
    • H01S3/10—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

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  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
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  • Optics & Photonics (AREA)
  • Lasers (AREA)

Abstract

The invention discloses a dual-band high-energy rectangular laser pulse generating system with an all-fiber structure, and aims to solve the technical problem that the conventional fiber laser is difficult to output dual-band high-energy laser pulses simultaneously. The system comprises a first fiber Bragg grating, a common single-mode fiber, a first 2 multiplied by 2 coupler, an ytterbium-doped fiber, a first wavelength division multiplexer, a pumping protector, a first pumping source, a first phase shifter, a second wavelength division multiplexer, a third wavelength division multiplexer, a second fiber Bragg grating, a dispersion compensation fiber, a second 2 multiplied by 2 coupler, an erbium-doped fiber, a fourth wavelength division multiplexer, a second pumping source and a second phase shifter. The laser system can simultaneously output two-waveband high-energy rectangular pulses with center wavelengths of 1060nm and 1550nm, and the pulse width of the rectangular pulses can be tuned by changing the pumping power. The invention has simple and compact structure and good stability, and can be directly used as a dual-band high-energy picosecond and nanosecond pulse light source.

Description

Dual-waveband high-energy rectangular laser pulse generation system with all-fiber structure
Technical Field
The invention belongs to the technical field of laser, and particularly relates to a design of a dual-waveband high-energy rectangular laser pulse generation system with an all-fiber structure.
Background
The mode-locked fiber laser has the characteristics of narrow pulse width, high peak power, large energy and the like of output pulses, and is widely applied to the fields of basic scientific research, high-speed optical communication, micro machining, ultrafast laser spectrum, precision metering and the like.
In recent years, due to the needs of scientific research and practical application, the research of the dual-band mode-locked fiber laser is more and more emphasized by researchers. Compare traditional "dual wavelength" mode locking fiber laser work at two adjacent center wavelength, dual waveband mode locking fiber laser realizes the phase place locking between the vertical mode simultaneously at two different spectral bands, and then outputs two central wavelength interval great (several hundred nanometers) ultrashort light pulse. The laser has unique advantages in applications such as polychromatic pump detection, nonlinear frequency conversion, and broadband supercontinuum generation. The output of a dual band high energy pulse is typically achieved by relying on control of an electrical feedback system and multi-stage amplification of the pulse, which is bulky and complex. The design of the dual-band mode-locked fiber laser with the all-fiber structure can greatly simplify the complexity of a laser system and improve the stability of the laser system. In addition, most reported dual-band mode-locked lasers operate at low pulse energies, with the type of pulse emitted being a conventional soliton, a tensile soliton, or a dissipative soliton. These types of pulses are limited by soliton area theory, and when the pump energy is too high, the pulses will split or convert to harmonic mode locking. The solution to this problem is to introduce a rectangular non-wave splitting pulse. In recent years, a pulse with a rectangular time domain section has attracted much attention, and as the pump power increases, the pulse width of the rectangular pulse linearly increases while the pulse peak amplitude remains unchanged, and the pulse energy can greatly exceed the energy level of a conventional pulse.
Therefore, a dual-band high-energy rectangular laser pulse generation system with an all-fiber structure is provided, and the system has wide application prospects in the fields of broadband supercontinuum generation and the like.
Disclosure of Invention
The invention aims to solve the technical problem that dual-band high-energy laser pulses are difficult to output simultaneously in the conventional passive mode-locked fiber laser, and provides a dual-band high-energy rectangular laser pulse generating system with an all-fiber structure.
The technical scheme of the invention is as follows: a dual-band high-energy rectangular laser pulse generation system with an all-fiber structure comprises a first fiber Bragg grating, a common single-mode fiber, a first 2 x 2 coupler, an ytterbium-doped fiber, a first wavelength division multiplexer, a pumping protector, a first pumping source, a first phase shifter, a second wavelength division multiplexer, a third wavelength division multiplexer, a second fiber Bragg grating, a dispersion compensation fiber, a second 2 x 2 coupler, an erbium-doped fiber, a fourth wavelength division multiplexer, a second pumping source, a second phase shifter, a first output end and a second output end; the first fiber Bragg grating, the common single-mode fiber, the first 2 multiplied by 2 coupler, the ytterbium-doped fiber, the first wavelength division multiplexer, the first phase shifter, the second wavelength division multiplexer and the third wavelength division multiplexer are sequentially connected to form a ytterbium-doped mode-locked fiber laser cavity; the first pump source is connected with the input end of the first wavelength division multiplexer through the pump protector; the second fiber Bragg grating, the dispersion compensation fiber, the second 2 multiplied by 2 coupler, the erbium-doped fiber, the fourth wavelength division multiplexer, the second phase shifter, the second wavelength division multiplexer and the third wavelength division multiplexer are sequentially connected to form an erbium-doped mode-locked fiber laser cavity; and the second pump source is connected with the input end of the fourth wavelength division multiplexer.
Preferably, the first pump source and the second pump source are both semiconductor lasers, and the central wavelength λ of the output pump light0Comprises the following steps: 980 nm.
Preferably, the first fiber Bragg grating has a reflection center wavelength of 1060nm, a reflection bandwidth of 6nm and a reflectivity of 95%.
Preferably, the second fiber bragg grating has a reflection center wavelength of 1550nm, a reflection bandwidth of 12nm, and a reflectivity of 95%.
Preferably, the coupling ratios of the first 2 x 2 coupler and the second 2 x 2 coupler are both 80/20.
Preferably, the ytterbium-doped fiber has a length of 1m and positive dispersion at 1060 nm.
Preferably, the erbium doped fiber has a length of 1m and positive dispersion at 1550 nm.
Preferably, the first wavelength division multiplexer has an operating wavelength of 980nm/1060 nm.
Preferably, the second wavelength division multiplexer and the third wavelength division multiplexer both have an operating wavelength of 1060nm/1550 nm.
Preferably, the fourth wavelength division multiplexer has an operating wavelength of 980nm/1550 nm.
Preferably, the operating wavelength of the first phase shifter is 1060 nm.
Preferably, the operating wavelength of the second phase shifter is 1550 nm.
Preferably, a common single mode optical fiber has a total length of 5m and positive dispersion at 1060 nm.
Preferably, the dispersion compensating fiber has a total length of 10m and a positive dispersion at 1550 nm.
The invention has the beneficial effects that:
(1) the devices used in the invention are all common devices which are commercialized, so that the method is easy to implement.
(2) The invention has the advantages of simple and compact structure, convenient and fast operation, good stability and the like.
(3) The invention can respectively realize the pulse width tuning of the two-waveband rectangular laser pulse by adjusting the pumping power, thereby enhancing the application range of the system.
Drawings
Fig. 1 is a schematic structural diagram of a dual-band high-energy rectangular laser pulse generation system with an all-fiber structure according to the present invention.
Fig. 2 is a time domain diagram of the output pulse of the first output terminal according to the embodiment of the invention.
Fig. 3 is a frequency domain diagram of the output pulse at the first output terminal according to the embodiment of the invention.
FIG. 4 is a time domain diagram of the output pulse at the second output terminal according to the embodiment of the present invention.
FIG. 5 is a frequency domain diagram of the output pulse at the second output terminal according to the embodiment of the present invention.
FIG. 6 is a time domain diagram of a square pulse at a first output under different pump power conditions according to an embodiment of the present invention.
FIG. 7 is a time domain diagram of a square pulse at a second output terminal under different pump power conditions according to an embodiment of the present invention.
Description of reference numerals: 1-first fiber Bragg grating, 2-common single mode fiber, 3-first 2 x 2 coupler, 4-ytterbium doped fiber, 5-first wavelength division multiplexer, 6-pumping protector, 7-first pumping source, 8-first phase shifter, 9-second wavelength division multiplexer, 10-third wavelength division multiplexer, 11-second fiber Bragg grating, 12-dispersion compensation fiber, 13-second 2 x 2 coupler, 14-erbium doped fiber, 15-fourth wavelength division multiplexer, 16-second pumping source, 17-second phase shifter, 18-first output end, 19-second output end.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings.
The invention provides a dual-band high-energy rectangular laser pulse generating system with an all-fiber structure, which comprises a first fiber Bragg grating 1, a common single-mode fiber 2, a first 2 x 2 coupler 3, an ytterbium-doped fiber 4, a first wavelength division multiplexer 5, a pumping protector 6, a first pumping source 7, a first phase shifter 8, a second wavelength division multiplexer 9, a third wavelength division multiplexer 10, a second fiber Bragg grating 11, a dispersion compensation fiber 12, a second 2 x 2 coupler 13, an erbium-doped fiber 14, a fourth wavelength division multiplexer 15, a second pumping source 16, a second phase shifter 17, a first output end 18 and a second output end 19, wherein the first fiber Bragg grating 1 is a single-mode fiber, the common single-mode fiber 2 is a single-mode fiber, and the second fiber Bragg grating 11 is a single-mode fiber, and the second; the first fiber Bragg grating 1, the common single-mode fiber 2, the first 2 multiplied by 2 coupler 3, the ytterbium-doped fiber 4, the first wavelength division multiplexer 5, the first phase shifter 8, the second wavelength division multiplexer 9 and the third wavelength division multiplexer 10 are sequentially connected to form a ytterbium-doped mode-locked fiber laser cavity; the first pump source 7 is connected with the input end of the first wavelength division multiplexer 5 through the pump protector 6; the second fiber bragg grating 11, the dispersion compensation fiber 12, the second 2 × 2 coupler 13, the erbium-doped fiber 14, the fourth wavelength division multiplexer 15, the second phase shifter 17, the second wavelength division multiplexer 9 and the third wavelength division multiplexer 10 are connected in sequence to form an erbium-doped mode-locked fiber laser cavity; the second pump source 16 is connected to an input of the fourth wavelength division multiplexer 15.
The first fiber Bragg grating 1 can adopt a fiber Bragg grating of a PSW-DMR model of Teraxion company, the reflection center wavelength is 1060nm, the reflection bandwidth is 6nm, and the reflectivity is 95%.
The second fiber Bragg grating 11 can adopt a fiber Bragg grating of a PSW-DMR model of Teraxion company, the reflection center wavelength is 1550nm, the reflection bandwidth is 12nm, and the reflectivity is 95%.
The coupling ratios of the first 2 × 2 coupler 3 and the second 2 × 2 coupler 13 are each 80/20.
The ytterbium-doped fiber 4 was a SM-YSF-HI type ytterbium-doped gain fiber produced by Nufern corporation, having a length of 1m and an Abbe number at 1060nm2Is 22ps2/km。
The erbium-doped fiber 14 is made of EDF-L1500 type erbium-doped gain fiber produced by Coractive company, has a length of 1m and a dispersion coefficient beta at 1550nm2Is 28ps2/km。
The operating wavelength of the first wavelength division multiplexer 5 is 980nm/1060 nm.
The second wavelength division multiplexer 9 and the third wavelength division multiplexer 10 both operate at 1060nm/1550 nm.
The fourth wavelength division multiplexer 15 has an operating wavelength of 980nm/1550 nm.
The first phase shifter 8 operates at 1060nm with a phase shift of-pi/3.
The second phase shifter 17 has an operating wavelength at 1550nm and a phase shift of-pi/3.
The ordinary single mode optical fiber 2 is a 1060-XP type single mode optical fiber manufactured by Nufern corporation, the total length of which is 5m, and the dispersion coefficient beta of which is 1060nm2Is 22ps2/km。
The dispersion compensating fiber 12 was a dispersion compensating fiber of DCF4 type manufactured by Thorlabs, having a total length of 10m and an Abbe number beta at 1550nm2Is 5ps2/km。
The physical model and the numerical simulation method related in the invention are as follows:
in order to truly and accurately simulate the generation and evolution process of the dual-waveband high-energy rectangular laser pulse in the system provided by the invention, the influence of each discrete device in the system on the pulse transmission in the cavity is fully considered by the adopted physical model, and the numerical solution is carried out by a step-by-step Fourier algorithm. Multiplying the optical field by a transmission matrix corresponding to the device when the optical pulse passes through the intracavity device; when an optical pulse passes through the intracavity optical fiber, the transmission characteristic of the pulse in the optical fiber is described by adopting a Kiltzburg-Landau equation:
Figure BDA0002895489140000041
wherein A represents the amplitude envelope of the light field; t and z are time and transmission distance, respectively; i is an imaginary unit; beta is a2γ and ΩgRespectively representing the second-order dispersion, the nonlinear parameter and the gain bandwidth of the optical fiber. g is the fiber gain coefficient, and for a common fiber, g is 0. Considering the gain saturation effect, the gain factor g can be expressed as:
g＝g0exp(-Ep/Es) (2)
in the formula g0，EpAnd EsRespectively representing the gain coefficient, pulse energy and gain saturation energy of the small signal, g0Proportional to the power of the pump source.
The all-fiber laser system provided by the invention is subjected to numerical simulation, and in order to accurately simulate the system provided by the invention, the following simulation parameters are set: the central wavelength of the first fiber Bragg grating 1 is 1060nm, the reflection bandwidth is 6nm, and the reflectivity is 95%; the coupling ratio of the first 2 x 2 coupler 3 is 80: 20; the ytterbium-doped fiber 4 has a length of 1m and a length of beta at 1060nm2Is 22ps2The nonlinear parameter gamma is 3/W/km; ytterbium doped fiber 4 gain bandwidth omegagIs 20 nm; small signal gain g0Is 3/m; gain saturation energy Es6.5 nJ; the phase shift amount of the first phase shifter 8 at 1060nm is-pi/3; the total length of the ordinary single mode optical fiber 2 is 5m, beta at 1060nm2Is 22ps2The nonlinear parameter gamma is 3/W/km; second optical fiber Bragg gratingThe central wavelength of the grating 11 is 1550nm, the reflection bandwidth is 12nm, and the reflectivity is 95%; the coupling ratio of the second 2 x 2 coupler 13 is 80: 20; the erbium-doped optical fiber 14 has a length of 1m and a beta at 1550nm2Is 28ps2The nonlinear parameter gamma is 3/W/km; erbium doped fiber 14 gain bandwidth omegagIs 40 nm; small signal gain g0Is 3/m; gain saturation energy EsIs 3 nJ; the phase shift amount of the second phase shifter 17 at 1550nm is-pi/3; the total length of the dispersion compensating fiber 12 is 10m, beta at 1550nm2Is 5ps2The nonlinear parameter gamma is 3/W/km; .
The specific principle and numerical simulation result of the invention are as follows:
the invention provides a dual-band high-energy rectangular laser pulse generating system with an all-fiber structure, which comprises an ytterbium-doped fiber laser cavity and an erbium-doped fiber laser cavity, and adopts a nonlinear amplification ring mirror mode locking technology. The principle of realizing mode locking of the ytterbium-doped fiber laser cavity and the erbium-doped fiber laser cavity is the same, and the former is taken as an example for explanation. In the laser cavity of the ytterbium-doped optical fiber, a first 2 x 2 coupler 3, a ytterbium-doped optical fiber 4, a first wavelength division multiplexer 5, a first phase shifter 8, a second wavelength division multiplexer 9 and a third wavelength division multiplexer 10 are connected in sequence through a common single mode optical fiber 2 to form a mode locker (in the invention, the mode locker refers to a nonlinear amplification ring mirror mode locker).
Clockwise and counter-clockwise running pulses are present in the mode locker, which are amplified by the ytterbium doped fiber 4, respectively, and then interfere in the first 2 x 2 coupler 3 to achieve mode locking. When the peak power of the incident pulse is smaller than the power threshold value which enables the mode locker to generate the peak power clamping effect, the mode locker enables the central transmittance of the pulse to be higher than the front and rear edges of the pulse, so that the front and rear edges of the pulse passing through each time are restrained, and the pulse width is compressed. Meanwhile, due to the spectral filtering effect of the mode locker and the first fiber Bragg grating 1, the high-frequency component and the low-frequency component of the pulse are filtered.
With the increasing power of the first pump source 7, the pulse peak power in the laser cavity of the ytterbium-doped fiber increases until the power threshold generated by the peak power clamping effect is exceeded. The transmittance of the central part of the pulse is reduced, so that the pulse peak power is clamped, and the pulse time domain shape gradually becomes rectangular. As the power of the pump source is further increased, the pulse width is increased, forming a high-energy rectangular pulse that is output outside the cavity through the first output terminal 18.
The numerical simulation is carried out on the dual-waveband high-energy rectangular laser pulse generating system with the all-fiber structure, and the result is as follows:
fig. 2 shows the temporal shape of the output pulse at the first output 18 of the laser system. It can be seen that the temporal shape of the pulse is approximately rectangular.
Fig. 3 is a spectral diagram of the output pulses of the first output 18 of the laser system.
Fig. 4 shows the temporal shape of the output pulse at the second output 19 of the laser system. It can be seen that the temporal shape of the pulse is approximately rectangular.
Fig. 5 shows a spectral diagram of the output pulses of the second output 19 of the laser system.
Fig. 6 is a time domain diagram of a square pulse at the first output 18 of the laser system under different pump power conditions. It can be seen that as the pump power is increased, the pulse peak power is substantially constant due to clamping, and the pulse width is increased.
Fig. 7 is a time domain diagram of a rectangular pulse at the second output 19 of the laser system under different pump power conditions. It can be seen that as the pump power is increased, the pulse peak power is substantially constant due to clamping, and the pulse width is increased.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.

Claims (14)

1. A dual-band high-energy rectangular laser pulse generation system with an all-fiber structure is characterized by comprising a first fiber Bragg grating (1), a common single-mode fiber (2), a first 2 x 2 coupler (3), an ytterbium-doped fiber (4), a first wavelength division multiplexer (5), a pumping protector (6), a first pumping source (7), a first phase shifter (8), a second wavelength division multiplexer (9), a third wavelength division multiplexer (10), a second fiber Bragg grating (11), a dispersion compensation fiber (12), a second 2 x 2 coupler (13), an erbium-doped fiber (14), a fourth wavelength division multiplexer (15), a second pumping source (16), a second phase shifter (17), a first output end (18) and a second output end (19); the first fiber Bragg grating (1), the common single-mode fiber (2), the first 2 x 2 coupler (3), the ytterbium-doped fiber (4), the first wavelength division multiplexer (5), the first phase shifter (8), the second wavelength division multiplexer (9) and the third wavelength division multiplexer (10) are sequentially connected to form a ytterbium-doped mode-locked fiber laser cavity; the first pump source (7) is connected with the input end of the first wavelength division multiplexer (5) through a pump protector (6); the second fiber Bragg grating (11), the dispersion compensation fiber (12), the second 2 multiplied by 2 coupler (13), the erbium-doped fiber (14), the fourth wavelength division multiplexer (15), the second phase shifter (17), the second wavelength division multiplexer (9) and the third wavelength division multiplexer (10) are sequentially connected to form an erbium-doped mode-locked fiber laser cavity; the second pump source (16) is connected with the input end of the fourth wavelength division multiplexer (15).
2. The dual-band high-energy rectangular laser pulse generation system of claim 1, wherein said first pump source (7) and said second pump source (16) are both semiconductor lasers, and the central wavelength λ of the output pump light is0Comprises the following steps: 980 nm.
3. The system for generating two-band high-energy rectangular laser pulses in an all-fiber structure according to claim 1, wherein the first fiber bragg grating (1) has a reflection center wavelength of 1060nm, a reflection bandwidth of 6nm, and a reflectivity of 95%.
4. The system for generating two-band high-energy rectangular laser pulses in an all-fiber structure according to claim 1, wherein the second fiber bragg grating (11) has a reflection center wavelength of 1550nm, a reflection bandwidth of 12nm, and a reflectivity of 95%.
5. The system of claim 1, wherein the coupling ratio of the first 2 x 2 coupler (3) and the second 2 x 2 coupler (13) is 80/20.
6. The dual-band high-energy rectangular laser pulse generation system of an all-fiber structure as claimed in claim 1, wherein said ytterbium-doped fiber (4) has a length of 1m and a positive dispersion at 1060 nm.
7. The system for generating two-band high-energy rectangular laser pulses of an all-fiber structure as claimed in claim 1, wherein said erbium-doped fiber (14) has a length of 1m and positive dispersion at 1550 nm.
8. The dual-band high-energy rectangular laser pulse generation system of an all-fiber structure according to claim 1, wherein the operating wavelength of said first wavelength division multiplexer (5) is 980nm/1060 nm.
9. The system for generating two-band high-energy rectangular laser pulses of an all-fiber structure according to claim 1, wherein the second wavelength division multiplexer (9) and the third wavelength division multiplexer (10) each have an operating wavelength of 1060nm/1550 nm.
10. The dual band high energy rectangular laser pulse generation system of all-fiber architecture as claimed in claim 1, wherein said fourth wavelength division multiplexer (15) has an operating wavelength of 980nm/1550 nm.
11. The dual-band high-energy rectangular laser pulse generation system of an all-fiber structure as claimed in claim 1, wherein the operating wavelength of said first phase shifter (8) is 1060 nm.
12. The dual-band high-energy rectangular laser pulse generation system of an all-fiber structure as claimed in claim 1, wherein the operating wavelength of said second phase shifter (17) is 1550 nm.
13. The dual-band high-energy rectangular laser pulse generation system of an all-fiber structure as claimed in claim 1, wherein said common single-mode fiber (2) has a total length of 5m and positive dispersion at 1060 nm.
14. The dual-band high-energy rectangular laser pulse generation system of an all-fiber structure as claimed in claim 1, wherein said dispersion compensation fiber (12) has a total length of 10m and a positive dispersion at 1550 nm.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110158265A1 (en) * 2009-12-30 2011-06-30 Industrial Technology Research Institute Ring or linear cavity of all-fiber-based ultra short pulse laser system and method of operating the same
CN105826801A (en) * 2016-05-06 2016-08-03 重庆邮电大学 Dual-wavelength tunable short pulse fiber laser
CN106711748A (en) * 2016-12-23 2017-05-24 电子科技大学 All-fiber structure high-energy rectangular laser pulse generation system and method
CN107069410A (en) * 2017-03-28 2017-08-18 电子科技大学 A kind of multipurpose bidirectional passive mode-locking full optical fiber laser system
CN107317219A (en) * 2017-07-07 2017-11-03 西北大学 Dual wavelength pulse optical fiber laser based on rhenium disulfide saturable absorber
CN109412009A (en) * 2018-11-12 2019-03-01 北京工业大学 The all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110158265A1 (en) * 2009-12-30 2011-06-30 Industrial Technology Research Institute Ring or linear cavity of all-fiber-based ultra short pulse laser system and method of operating the same
CN105826801A (en) * 2016-05-06 2016-08-03 重庆邮电大学 Dual-wavelength tunable short pulse fiber laser
CN106711748A (en) * 2016-12-23 2017-05-24 电子科技大学 All-fiber structure high-energy rectangular laser pulse generation system and method
CN107069410A (en) * 2017-03-28 2017-08-18 电子科技大学 A kind of multipurpose bidirectional passive mode-locking full optical fiber laser system
CN107317219A (en) * 2017-07-07 2017-11-03 西北大学 Dual wavelength pulse optical fiber laser based on rhenium disulfide saturable absorber
CN109412009A (en) * 2018-11-12 2019-03-01 北京工业大学 The all-fiber Q-switch and mode-locking pulse laser of dual resonant cavity coupling

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