CN214849527U - Oscillation amplification integrated ultrashort pulse fiber laser - Google Patents
Oscillation amplification integrated ultrashort pulse fiber laser Download PDFInfo
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- CN214849527U CN214849527U CN202121166032.0U CN202121166032U CN214849527U CN 214849527 U CN214849527 U CN 214849527U CN 202121166032 U CN202121166032 U CN 202121166032U CN 214849527 U CN214849527 U CN 214849527U
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Abstract
The application relates to laser technology, fiber optics and nonlinear optics field, especially relate to an ultrashort pulse fiber laser of oscillation amplification integration, and ultrashort pulse fiber laser of oscillation amplification integration includes: an oscillator, an amplifier, and an optical isolator; the amplifier is connected with the oscillator; the oscillator generates seed laser and sends the seed laser to the amplifier; the amplifier is used for amplifying the power of the seed laser after receiving the seed laser sent by the oscillator; and the optical isolator comprises a first input end and an output end, wherein the first input end is used for being connected with an oscillator or an amplifier, and the output end is used for outputting pulse laser. The application provides an ultrashort pulse fiber laser of oscillation amplification integration can further promote mode locking fiber oscillator's output, and this both reduced the quantity of the follow-up optic fibre amplification level of high power ultrashort pulse laser, reduced laser system's complexity again, still improved laser system's stability.
Description
Technical Field
The application relates to the field of laser technology, fiber optics and nonlinear optics, in particular to an oscillation amplification integrated ultrashort pulse fiber laser.
Background
At present, compared with the traditional ultrashort pulse solid laser, the ultrashort pulse fiber laser has the advantages of simple structure, high average power, high peak power, good environmental stability, high electro-optical efficiency and the like, and is widely applied to the fields of precision machining, laser sensing, waveguide etching, attosecond science and the like. The passive mode locking technology has been developed rapidly in the past decades as one of the important means for obtaining ultrashort pulse output. However, with the development of science and technology, there are many problems to be solved and optimized in the industrial process of ultrashort pulse fiber laser, especially in the precision process, higher power and pulse energy are required.
In recent years, in order to obtain high-power ultrashort pulse laser output and sufficiently exert the advantages of a fiber laser and a fiber amplifier, methods such as coherent synthesis and spectral synthesis have been reported in succession. At present, an ultrashort pulse fiber laser with high average Power and high pulse energy generally consists of a low-Power laser seed source and a multi-stage Power Amplifier (MOPA). The low-power seed source determines the key performances of the laser output such as wavelength, pulse width, repetition frequency and the like, and the power amplifier determines the average power, pulse energy and peak power of the laser output, so that the high-stability and excellent-performance seed source plays an important role in a high-power ultrashort-pulse fiber laser. Although the method of Main Oscillation Power Amplification (MOPA) can improve the output power of the laser to a certain extent, the manufacturing method has the problems of large overall structure volume, complex process, high production cost and the like.
SUMMERY OF THE UTILITY MODEL
The application aims to provide an oscillation amplification integrated ultrashort pulse fiber laser to solve the technical problems of large integral structure size, complex process, high production cost and the like of the conventional high-power ultrashort pulse fiber laser in the prior art to a certain extent.
The application provides an ultrashort pulse fiber laser of oscillation amplification integration includes: an oscillator, an amplifier, and an optical isolator; the amplifier is connected with the oscillator;
the oscillator generates seed laser and sends the seed laser to the amplifier;
the amplifier is used for amplifying the power of the seed laser after receiving the seed laser sent by the oscillator so as to obtain pulse laser with the power being increased;
the optical isolator comprises a first input end and an output end, the first input end is used for being connected with the oscillator or the amplifier, and the output end is used for outputting the pulse laser.
In the above technical solution, further, the oscillator includes a pump source, a pump coupler, a first doped fiber, a fiber grating, and a saturable absorber;
the pump coupler comprises a second input end, a common end and a signal end; the second input end is connected with the pumping source;
the public end is connected with the amplifier, the fiber grating, the first doped fiber and the saturable absorber in sequence; the signal end is connected with the first input end of the optical isolator.
In any of the above technical solutions, further, the oscillator includes a pump source, a pump coupler, a first doped fiber, a fiber grating, and a saturable absorber;
the pump coupler comprises a second input end, a common end and a signal end; the second input end is connected with the pumping source;
the second input end is connected with the pumping source; the signal end is connected with the saturable absorber;
the common terminal is connected with the first doped fiber, the fiber grating, the amplifier and the first input terminal of the optical isolator.
In any of the above technical solutions, further, the amplifier is a second doped fiber;
the first doped fiber and the second doped fiber are fibers doped with one or more rare earth elements or photonic crystal fibers.
In any of the above technical solutions, further, the pump source is one of a semiconductor laser, a solid laser, a fiber laser, and a raman laser.
In any of the above technical solutions, further, the fiber grating is a fiber grating or a chirped fiber bragg grating.
In any of the above technical solutions, further, the pump source is connected to the second input end of the pump coupler through a pump input fiber.
In any of the above technical solutions, further, the saturable absorber and the fiber grating form a resonant cavity;
under the excitation of the pump source, the first doped fiber oscillates the seed laser in the resonant cavity.
In any of the above technical solutions, further, the saturable absorber is one of a semiconductor saturable absorber mirror, graphene oxide, a carbon nanotube, or a topological insulator.
In any of the above technical solutions, further, the operating wavelength corresponding to the pump coupler is one of 1 micron, 1.5 microns, and 2 microns;
the wavelength corresponding to the fiber grating is one of 1 micron, 1.5 microns and 2 microns.
Compared with the prior art, the beneficial effect of this application is:
the application provides an ultrashort pulse fiber laser of oscillation amplification integration includes: an oscillator, an amplifier, and an optical isolator; the amplifier is connected with the oscillator; the oscillator generates seed laser and sends the seed laser to the amplifier; the amplifier is used for amplifying the power of the seed laser after receiving the seed laser sent by the oscillator so as to obtain pulse laser with the power being increased; and the optical isolator comprises a first input end and an output end, wherein the first input end is used for being connected with an oscillator or an amplifier, and the output end is used for outputting pulse laser.
The application provides an ultrashort pulse fiber laser of oscillation amplification integration can further promote mode locking fiber oscillator's output, and this both reduced the quantity of the follow-up optic fibre amplification level of high power ultrashort pulse laser, reduced laser system's complexity again, still improved laser system's stability.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of an end-pumped oscillation-amplification integrated ultrashort pulse fiber laser provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a principle of an intracavity pump oscillation-amplification integrated ultrashort pulse fiber laser provided in an embodiment of the present application.
Reference numerals:
1-pump source, 2-pump coupler, 3-second doped fiber, 4-fiber grating, 5-first doped fiber, 6-saturable absorber, and 7-optical isolator.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.
The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
An oscillation amplification integrated ultrashort pulse fiber laser according to some embodiments of the present application is described below with reference to fig. 1 and 2.
Referring to fig. 1 and 2, an embodiment of the present application provides an oscillation amplification integrated ultrashort pulse fiber laser, including an oscillator, an amplifier and an optical isolator 7, where the amplifier is connected to the oscillator and the optical isolator 7, respectively, and the optical isolator 7 is connected to the oscillator or the amplifier.
Specifically, the oscillator can generate seed laser light and send the generated seed laser light to the amplifier, and the amplifier receives the seed laser light and amplifies the power of the seed laser light to obtain pulse laser light with increased power (hereinafter referred to as high-power pulse laser light); the optical isolator 7 comprises a first input end and an output end, wherein the first input end is connected with the oscillator or the amplifier, so that the high-power pulse laser passes through the optical isolator 7 and then is output from the output end.
The application provides an ultrashort pulse fiber laser of oscillation amplification integration can further promote mode locking fiber oscillator's output, and this both reduced the quantity of the follow-up optic fibre amplification level of high power ultrashort pulse laser, reduced laser system's complexity again, still improved laser system's stability.
Further, the oscillator includes: the device comprises a pumping source 1, a pumping coupler 2, a first doped fiber 5, a fiber grating 4 and a saturable absorber 6, wherein the saturable absorber 6 and the fiber grating 4 form a resonant cavity; under the excitation of the pump source 1, the first doped fiber 5 oscillates seed laser in the resonant cavity. The oscillation amplification integrated ultrashort pulse fiber laser can be suitable for two pumping modes of end pumping and intracavity pumping, the connection relation of each component in the oscillation amplification integrated ultrashort pulse fiber laser provided by the application is specifically introduced hereinafter, and the oscillation amplification integrated ultrashort pulse fiber laser corresponds to two oscillation-amplification integrated ultrashort pulse fiber lasers.
Preferably, the amplifier is a second doped fiber 3;
the first doped fiber 5 and the second doped fiber 3 are preferably fibers doped with one or more rare earth elements including but not limited to ytterbium, erbium, thulium, etc. or photonic crystal fibers, and the doped fibers or other fiber devices used in the present embodiment may be polarization maintaining fibers or non-polarization maintaining fibers, without any particular limitation, and are preferably single-clad ytterbium-doped fibers.
Preferably, the pump source 1 is one of a semiconductor laser, a solid laser, a fiber laser, and a raman laser, but other types of lasers capable of achieving the same or similar effects are also within the scope of the present application.
Preferably, the fiber grating 4 is a fiber grating 4 or a chirped fiber bragg grating.
Preferably, the saturable absorber 6 is one of a semiconductor saturable absorber mirror, graphene oxide, carbon nanotubes, or a topological insulator.
Preferably, the operating wavelength corresponding to the pump coupler 2 is one of 1 micron, 1.5 microns and 2 microns;
the wavelength corresponding to the fiber grating 4 is one of 1 micron, 1.5 microns and 2 microns.
First aspect
Referring to fig. 1, fig. 1 is a schematic structural diagram of an end-pumped oscillation-amplification integrated ultrashort pulse fiber laser provided in an embodiment of the present application, where an input end (i.e., a second input end) of a pump coupler 2 is connected to a pump source 1, specifically, the pump source 1 is connected to the pump coupler 2 through a pump input light; the common end of the pump coupler 2 is connected with a second doped fiber 3, a fiber grating 4, a first doped fiber 5 and a saturable absorber 6 in sequence; the signal terminal of the pump coupler 2 is connected to an input terminal (i.e., a first input terminal) of an opto-isolator 7.
As a preferred embodiment, the pump source 1 is a semiconductor laser, the center wavelength of which is 974 nm; the pump coupler 2 is a wavelength division multiplexer (980/1064nm) and is correspondingly provided with an input end, a signal end and a common end; the first doped fiber 5 is a single-clad ytterbium-doped fiber; the second doped optical fiber 3 is a single-clad ytterbium-doped optical fiber; the central wavelength of the fiber grating 4 is 1064nm, and the reflectivity is 50%; the saturable absorber 6 is a key device of the mode locking, and can comprise a semiconductor saturable absorber mirror, graphene oxide, a carbon nanotube, a topological insulator and the like; the optical isolator 7 has an input terminal and an output terminal.
The semiconductor laser with the central wavelength of 974nm is connected with the pumping input end of the wavelength division multiplexer (980/1064 nm); the common end of the wavelength division multiplexer is connected with the single-cladding ytterbium-doped optical fiber; the other end of the single-clad ytterbium-doped fiber is connected with a fiber grating 4 with the central wavelength of 1064nm and the reflectivity of 50%; the other end of the fiber grating 4 is connected with a single-clad ytterbium-doped fiber; the other end of the single-clad ytterbium-doped fiber is connected with a saturable absorber 6, and the signal end of the wavelength division multiplexer is connected with the input end of an optical isolator 7; the output end of the optical isolator 7 is used as a laser output port; the output of the opto-isolator 7 is used for higher power pulsed laser output.
Second aspect of the invention
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a principle of an intracavity pump oscillation-amplification integrated ultrashort pulse fiber laser provided by an embodiment of the present application. Wherein, the input end (i.e. the second input end) of the pump coupler 2 is connected with the pump source 1; the signal end of the pump coupler 2 is connected with the saturable absorber 6; the common end of the pump coupler 2 is sequentially connected with the first doped fiber 5, the fiber grating 4, the second doped fiber 3 and the input end (i.e. the first input end) of the optical isolator 7.
As a preferred embodiment, the pump source 1 is a semiconductor laser, the center wavelength of which is 974 nm; the pump coupler 2 is a wavelength division multiplexer (980/1064nm) and is correspondingly provided with an input end, a signal end and a common end; the first doped fiber 5 is a single-clad ytterbium-doped fiber; the second doped optical fiber 3 is a single-clad ytterbium-doped optical fiber; the central wavelength of the fiber grating 4 is 1064nm, and the reflectivity is 50%; the saturable absorber 6 is a key device of the mode locking, and can comprise a semiconductor saturable absorber mirror, graphene oxide, a carbon nanotube, a topological insulator and the like; the optical isolator 7 has an input terminal and an output terminal.
The semiconductor laser with the central wavelength of 974nm is connected with the pumping input end of wavelength division multiplexing (980/1064 nm); the signal end of the wavelength division multiplexer is connected with a saturable absorber 6; the common end of the wavelength division multiplexer is connected with the single-cladding ytterbium-doped optical fiber; the other end of the single-clad ytterbium-doped fiber is connected with a fiber grating 4 with the central wavelength of 1064nm and the reflectivity of 50%; the other end of the fiber grating 4 is connected with a single-clad ytterbium-doped fiber; the other end of the single-clad ytterbium-doped fiber is connected with the input end of an optical isolator 7; the output end of the optical isolator 7 is used as a laser output port; the output of the opto-isolator 7 is used for higher power pulsed laser output.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. An oscillation amplification integrated ultrashort pulse fiber laser is characterized by comprising: an oscillator, an amplifier, and an optical isolator; the amplifier is connected with the oscillator;
the oscillator generates seed laser and sends the seed laser to the amplifier;
the amplifier is used for amplifying the power of the seed laser after receiving the seed laser sent by the oscillator so as to obtain pulse laser with the power being increased;
the optical isolator comprises a first input end and an output end, the first input end is used for being connected with the oscillator or the amplifier, and the output end is used for outputting the pulse laser.
2. The oscillation amplification integrated ultrashort pulse fiber laser of claim 1, wherein the oscillator comprises a pump source, a pump coupler, a first doped fiber, a fiber grating, a saturable absorber;
the pump coupler comprises a second input end, a common end and a signal end; the second input end is connected with the pumping source;
the public end is connected with the amplifier, the fiber grating, the first doped fiber and the saturable absorber in sequence; the signal end is connected with the first input end of the optical isolator.
3. The oscillation amplification integrated ultrashort pulse fiber laser of claim 1, wherein the oscillator comprises a pump source, a pump coupler, a first doped fiber, a fiber grating, a saturable absorber;
the pump coupler comprises a second input end, a common end and a signal end; the second input end is connected with the pumping source; the signal end is connected with the saturable absorber;
the common terminal is connected with the first doped fiber, the fiber grating, the amplifier and the first input terminal of the optical isolator.
4. The oscillation amplification integrated ultrashort pulse fiber laser of claim 2 or 3, wherein the amplifier is a second doped fiber;
the first doped fiber and the second doped fiber are fibers doped with one or more rare earth elements or photonic crystal fibers.
5. The oscillation amplification integrated ultrashort pulse fiber laser as claimed in claim 2 or 3, wherein the pump source is one of a semiconductor laser, a solid laser, a fiber laser and a Raman laser.
6. The oscillation amplification integrated ultrashort pulse fiber laser as claimed in claim 2 or 3, wherein the fiber grating is a fiber grating or a chirped fiber Bragg grating.
7. The oscillation amplification integrated ultrashort pulse fiber laser as claimed in claim 2 or 3, wherein the pump source is connected with the second input end of the pump coupler through a pump input fiber.
8. The oscillation amplification integrated ultrashort pulse fiber laser as claimed in claim 2 or 3, wherein the saturable absorber and the fiber grating constitute a resonant cavity;
under the excitation of the pump source, the first doped fiber oscillates the seed laser in the resonant cavity.
9. The oscillation amplification integrated ultrashort pulse fiber laser as claimed in claim 2 or 3, wherein the saturable absorber is one of a semiconductor saturable absorber mirror, graphene oxide, carbon nanotube or topological insulator.
10. The oscillation amplification integrated ultrashort pulse fiber laser as claimed in claim 2 or 3, wherein the working wavelength corresponding to the pump coupler is one of 1 micron, 1.5 microns and 2 microns;
the wavelength corresponding to the fiber grating is one of 1 micron, 1.5 microns and 2 microns.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022587930 | 2020-11-10 | ||
| CN2020225879305 | 2020-11-10 |
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