CN110233411B - Laser capable of outputting in cross-band mode - Google Patents
Laser capable of outputting in cross-band mode Download PDFInfo
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- CN110233411B CN110233411B CN201910456780.3A CN201910456780A CN110233411B CN 110233411 B CN110233411 B CN 110233411B CN 201910456780 A CN201910456780 A CN 201910456780A CN 110233411 B CN110233411 B CN 110233411B
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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
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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
- H01S3/07—Construction or shape of active medium consisting of a plurality of parts, e.g. segments
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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
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08004—Construction or shape of optical resonators or components thereof incorporating a dispersive element, e.g. a prism for wavelength selection
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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
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08086—Multiple-wavelength emission
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Abstract
The invention provides a laser capable of outputting in a cross-waveband mode.A gain medium amplifies power of an input light wave and a spectrum broadening component broadens the spectrum of the input light wave to obtain a target light wave, and the target light wave is sent to a light wave extraction component; the light wave extraction component extracts light waves with preset wavelengths corresponding to the laser output assembly to which the light wave extraction component belongs from the target light waves and sends the extracted light waves to the light splitting component; the light splitting component performs light splitting processing on the received light waves, uses the obtained partial light waves as output light waves of the laser output assembly to which the light splitting component belongs, and sends the rest light waves to other laser output assemblies. The embodiment of the invention provides a laser capable of outputting light waves in a cross-waveband mode, wherein the input light waves are directionally converted in the same resonant cavity, and a plurality of laser output components are used for respectively processing the input light waves to obtain light waves in different wavebands, so that the same laser can output a plurality of light waves in different wavebands.
Description
Technical Field
The invention relates to the technical field of lasers, in particular to a laser capable of outputting in a cross-waveband mode.
Background
A laser is a device capable of emitting laser, and with the progress of science and technology, the laser is widely used in various technical fields such as medical treatment, military, industry, communication, and the like.
When the laser works, the excitation source provides energy to enable the gain medium to achieve population inversion, so that optical radiation and gain can be provided for light within a gain bandwidth range, and laser with specific wavelength is generated under the feedback of the resonant cavity.
Because most of the existing lasers can only work in a specific wavelength range, if laser light sources located in different working wave bands are required to be obtained simultaneously, a plurality of different independent lasers are needed, and the use is inconvenient.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a laser capable of outputting light waves in different wavelength bands simultaneously.
In a first aspect, an embodiment of the present invention provides a laser capable of outputting across a wavelength band, including a resonant cavity, where the resonant cavity includes a plurality of laser output components; each laser output component outputs light waves with corresponding preset wavelengths;
the laser output assembly includes: the device comprises a gain medium, a spectrum broadening component, a light wave extraction component and a light splitting component;
the gain medium is used for carrying out power amplification on the input light wave and the frequency spectrum broadening component is used for carrying out frequency spectrum broadening on the input light wave to obtain a target light wave, and the target light wave is sent to the light wave extraction component; the target optical wave comprises an optical wave with a preset wavelength corresponding to the spectrum broadening component and the laser output component to which the gain medium belongs;
the light wave extraction component extracts light waves with preset wavelengths corresponding to the laser output assemblies to which the light wave extraction component belongs from the target light waves and sends the extracted light waves to the light splitting component;
the light splitting component performs light splitting processing on the received light waves, uses the obtained partial light waves as output light waves of the laser output assembly to which the light splitting component belongs, and sends the rest light waves to other laser output assemblies.
In combination with the first aspect, the embodiments of the present invention provide a first possible implementation manner of the first aspect, wherein,
the gain medium in each laser output assembly is used for power amplification of the optical wave of the corresponding wavelength.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the laser output assembly further includes a dispersion compensation component;
each laser output assembly is sequentially connected according to a first sequence of a dispersion compensation component, a spectrum broadening component, a gain medium, a light wave extraction component and a light splitting component;
the dispersion compensation component carries out dispersion compensation on the input optical wave and sends the optical wave obtained by dispersion compensation to the spectrum broadening component;
the spectrum broadening component performs spectrum broadening on the optical wave obtained by dispersion compensation, and sends the optical wave obtained by spectrum broadening to the gain medium for power amplification.
With reference to the second possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein the laser output assembly further includes a dispersion compensation component;
each laser output assembly is sequentially arranged according to a second sequence of the gain medium, the dispersion compensation component, the spectrum broadening component, the light wave extraction component and the light splitting component;
the gain medium amplifies the power of the input light wave and sends the light wave obtained by power amplification to the dispersion compensation component;
the dispersion compensation component performs dispersion compensation on the optical wave obtained by power amplification, and sends the optical wave obtained by dispersion compensation to the spectrum broadening component for spectrum broadening.
With reference to the second possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where center wavelengths of the gain medium, the optical wave extraction component in the laser output assembly to which the gain medium belongs, and the light splitting component in the laser output assembly to which the gain medium belongs are equal.
With reference to the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the center wavelengths of the gain medium, the optical wave extraction component in the laser output assembly on the front optical path, which is connected to the laser output assembly to which the gain medium belongs, and the light splitting component in the laser output assembly on the front optical path, which is connected to the laser output assembly to which the gain medium belongs, are equal.
With reference to the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the spectral broadening component is a highly nonlinear optical fiber or an optical waveguide.
With reference to the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein the light splitting component includes an optical coupler or a beam splitter.
In combination with the first aspect, the embodiments of the present invention provide an eighth possible implementation manner of the first aspect, wherein,
the resonant cavity further comprises at least one reflective component;
the reflecting component reflects the light wave in the resonant cavity.
With reference to the first aspect, an embodiment of the present invention provides a ninth possible implementation manner of the first aspect, where the optical wave extraction component includes a band-pass filter.
The laser capable of outputting in a cross-waveband mode provided by the embodiment of the invention comprises a resonant cavity, wherein the resonant cavity comprises a plurality of laser output components; each laser output component outputs light waves with corresponding preset wavelengths; the laser output assembly includes: the device comprises a gain medium, a spectrum broadening component, a light wave extraction component and a light splitting component; the gain medium performs power amplification on the input light wave and the spectrum broadening component performs spectrum broadening on the input light wave to obtain a target light wave, and the target light wave is sent to the light wave extraction component; the light wave extraction component extracts light waves with preset wavelengths corresponding to the laser output assembly to which the light wave extraction component belongs from the target light waves and sends the extracted light waves to the light splitting component; the light splitting component performs light splitting processing on the received light waves, uses the obtained partial light waves as output light waves of the laser output assembly to which the light splitting component belongs, and sends the rest light waves to other laser output assemblies. The input light wave of the laser capable of outputting in a cross-waveband mode provided by the embodiment of the invention is directionally converted in the same resonant cavity, and the input light wave is respectively processed by the plurality of laser output components to obtain light waves in different wavebands, so that the light waves in different wavebands are output in the same laser.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a laser capable of outputting across a wavelength band according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another laser capable of outputting across a wavelength band according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another laser capable of outputting across a wavelength band according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another laser capable of outputting across a wavelength band according to an embodiment of the present invention.
Icon:
100, a resonant cavity; 101, a first gain medium; 102, a first spectral broadening component; 103, a first lightwave extraction component; 104, a first light splitting component; 105, a second gain medium; 106, a second spectral broadening component; 107, a second light wave extraction component; 108, a second light splitting component;
200, a ring resonator; 201, a first highly nonlinear optical fiber; 202, a first fiber amplifier; 203, a first band-pass filter; 204, a first optical coupler; 205, a second highly nonlinear optical fiber; 206, a second fiber amplifier; 207, a second band pass filter; 208, a second optical coupler;
300, a linear resonant cavity; 301, a first mirror; 302, a second optical coupler; 303, a first band-pass filter; 304, a first optical circulator; 305, a first fiber amplifier; 306, a first high nonlinear fiber; 307, a second optical circulator; 308, a second fiber amplifier; 309, a second highly nonlinear fiber; 310, a second band-pass filter; 311, a first optical coupler; 312, a second mirror;
401, a thulium doped fiber amplifier; 402, a first dispersion compensating fiber; 403, a first high nonlinear optical fiber; 404, a first band-pass filter; 405, a first optical coupler; 406, an erbium doped fiber amplifier; 407, a second dispersion compensating fiber; 408, a second highly nonlinear fiber; 409, a second band-pass filter; 410, a second optical coupler; 411, ytterbium-doped fiber amplifier; 412, a third dispersion compensating fiber; 413, third high nonlinear fiber; 414, a third band-pass filter; 415, a third optical coupler; 416, an erbium doped fiber amplifier; 417, a fourth dispersion compensating fiber; 418, a fourth high nonlinear fiber; 419, a fourth bandpass filter; 420, a fourth optical coupler.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a laser capable of outputting in a cross-wavelength band provided for the embodiment of the present application includes two laser output assemblies. It should be understood that the resonator is shown here with only two laser output components for ease of description. In a specific implementation, the number of laser output components in the resonant cavity may be plural.
In the schematic structural diagram of a laser capable of outputting in a cross-band mode shown in fig. 1, a resonant cavity 100 includes a first laser output component and a second laser output component, the first laser output component includes a first gain medium 101, a first spectral broadening component 102, a first optical wave extraction component 103, and a first optical splitting component 104; the second laser output assembly comprises a second gain medium 105, a second spectral broadening component 106, a second optical wave extraction component 107 and a second beam splitting component 108.
In a specific implementation, the first gain medium 101 is different from the second gain medium 105. Because the input light wave is subjected to power amplification through the gain medium, the wave band ranges of the light waves obtained after power amplification is carried out on different gain media are different.
In the specific implementation, the rare earth doping which is doped with specific rare earth ions is required in the gain medium to perform power amplification on the input light wave, and the gain waveband which can be provided by each rare earth ion is determined by the substance atomic level structure of the corresponding rare earth ion, so that the laser generated by each rare earth doped fiber laser is limited by the gain medium of the laser, and therefore, the laser can only work in a specific wavelength range. That is, to obtain light waves in different wavelength ranges, the rare earth ions doped in the gain medium are different, and thus the gain medium is different in different laser output components.
In a specific implementation, the first light wave extraction component 103 and the second light wave extraction component 107 are different, and the wavelength ranges of the light waves extracted by the different light wave extraction components are different.
The working principle is as follows: after an input optical wave passes through the first gain medium 101, the first gain medium 101 performs power amplification on the input optical wave, then the first spectral broadening component performs spectral broadening on the input optical wave to obtain a first target optical wave, and then the first target optical wave is sent to the first optical wave extraction component 103, the first optical wave extraction component 103 extracts an optical wave with a predetermined wavelength corresponding to a first laser output component to which the first target optical wave belongs from the first target optical wave, and sends the extracted optical wave to the first optical splitting component 104; the first light splitting component 104 performs a light splitting process on the received light wave, and the obtained partial light wave is used as an output light wave of a first laser output module to which the first light splitting component 104 belongs, and the remaining light wave is sent to a second gain medium 105 of a second laser output module, so that the second gain medium 105 of the second laser output module performs power amplification on the power of the remaining light wave, and then a second spectrum broadening component 106 performs spectrum broadening on the input light wave to obtain a second target light wave, and sends the light wave subjected to the power amplification and the spectrum broadening to a second light wave extraction component 107, the second light wave extraction component 107 extracts a light wave with a predetermined wavelength corresponding to the second laser output module to which the second light splitting component belongs, and sends the extracted light wave to a second light splitting component 108, the second light splitting component 108 performs a light splitting process on the received light wave, and the obtained partial light wave is used as an output light wave of the second laser output module to which the second light splitting component 108 belongs, the remaining optical waves are sent to the first gain medium 101 of the first laser output assembly again, and the cycle is repeated.
The laser capable of outputting in a cross-waveband mode can realize the back-and-forth conversion of input light waves on light waves with different wavelengths, so that the light waves with multiple wavebands are subjected to a coherent action.
In a specific implementation, the gain medium may be a fiber amplifier; the spectrum broadening component can be a high nonlinear optical fiber or an optical waveguide, and can broaden an optical wave to an operating waveband capable of covering a gain medium on a rear optical path; the light wave extraction means may be a band pass filter; the light splitting part includes a light coupler or a spectroscope.
In particular, according to the laser capable of outputting across a wavelength band provided by the embodiment of the present application, the resonant cavity may be designed as an annular cavity, and the plurality of laser output assemblies are sequentially arranged to form an annular structure. Another laser capable of outputting in a cross-band manner, as shown in fig. 2, includes a ring resonator 200, where the ring resonator 200 includes a first laser output component and a second laser output component, and the first laser output component includes a first highly nonlinear optical fiber 201, a first optical fiber amplifier 202, a first band-pass filter 203, and a first optical coupler 204, which are arranged in sequence; the second laser output assembly comprises a second high nonlinear optical fiber 205, a second optical fiber amplifier 206, a second band-pass filter 207 and a second optical coupler 208 which are sequentially arranged, the first optical coupler 204 is connected with the second high nonlinear optical fiber 205, the second optical coupler 208 is connected with the first optical fiber amplifier 202, and the components are sequentially arranged end to form an annular structure.
When the resonant cavity is a ring cavity, the light waves can be converted back and forth in the ring cavity, so that the light waves are transmitted in a single direction in the ring cavity.
The resonant cavity can also be designed as a linear cavity, and a plurality of laser output components are sequentially arranged to form a linear structure. When the resonant cavity is a linear cavity, in order to realize the back-and-forth conversion of the light wave, an optical circulator can be added in the resonant cavity to realize the bidirectional propagation of the light wave.
In particular, a first reflecting component and a second reflecting component can be further arranged in the resonant cavity, and the first reflecting component and the second reflecting component reflect the light waves in the resonant cavity. For example by providing a mirror at each end of the cavity.
Another laser capable of outputting in a cross-band wavelength as shown in fig. 3 comprises a linear resonant cavity 300, wherein the linear resonant cavity 300 comprises a first mirror 301, a second optical coupler 302, a first band-pass filter 303, a first optical circulator 304, a first optical fiber amplifier 305, a first high nonlinear optical fiber 306, a second optical circulator 307, a second optical fiber amplifier 308, a second high nonlinear optical fiber 309, a second band-pass filter 310, a first optical coupler 311 and a second mirror 312.
The first optical circulator 304, the first optical fiber amplifier 305, the first high nonlinear optical fiber 306, the second optical circulator 307, the second optical fiber amplifier 308, and the second high nonlinear optical fiber 309 are sequentially arranged end to form an annular component.
The first mirror 301, the second optical coupler 302, the first band-pass filter 303, the ring member, the second band-pass filter 310, the first optical coupler 311, and the second mirror 312 are linearly arranged to form a linear resonator.
In a specific implementation, when the wavelengths of the light waves to be output are different greatly, the linear resonant cavity may include therein a ring member formed of a first optical circulator, a first optical fiber amplifier, a first highly nonlinear optical fiber, a second optical circulator, a second optical fiber amplifier, and a second highly nonlinear optical fiber. When the wavelengths of the light waves to be output do not differ much, the linear resonator may include only the first mirror, the first band-pass filter, the fiber amplifier, the high nonlinear optical fiber, the first band-pass filter, and the second mirror, which are linearly arranged.
For convenience of description, a ring resonator is taken as an example, and a laser capable of outputting across a wavelength band provided by the embodiment of the present application is specifically described below.
It will be appreciated that when a plurality of laser output assemblies are contained within the cavity, the plurality of laser output assemblies are connected end to end in series to form a ring. Different laser output components can output light waves with different wave bands.
Specifically, the spectral broadening section may spectrally broaden the input optical wave; the gain medium performs power amplification on the input light wave.
The arrangement positions of the spectrum broadening component and the gain medium can be changed, namely, the spectrum broadening component and the gain medium have two arrangement sequences. In order to distinguish between the spectral broadening components and the gain medium in the two orders of arrangement, the spectral broadening components and the gain medium in the first order of arrangement are here designated as first spectral broadening components and first gain medium, and the spectral broadening components and the gain medium in the second order of arrangement are here designated as second spectral broadening components and second gain medium.
The first arrangement order is: the spectral broadening component precedes the gain medium. In a first arrangement, the processing of the input light wave is: the spectrum broadening component firstly broadens the spectrum of the input optical wave, and transmits the optical wave obtained by spectrum broadening to the gain medium, and the gain medium then amplifies the power of the received optical wave.
The second arrangement order is: the gain medium precedes the spectral broadening component. In a second arrangement, the processing of the input light wave is: the gain medium firstly amplifies the power of the input light wave, and the power is amplified to obtain the light wave which is sent to the spectrum broadening component, and then the spectrum broadening component carries out spectrum broadening on the received light wave.
The two permutations were compared: in the first arrangement, the laser has a low energy conversion efficiency. Because of the second arrangement, the gain medium will power amplify all of the input light waves when the gain medium is arranged in front of the spectral broadening component. When the spectrum width in the optical wave extracting part is smaller than the gain spectrum of the spectrum widening part, the optical wave which has been subjected to power amplification is filtered out, and thus the energy of the optical wave is wasted. However, in the second arrangement, the peak value of the pulse spectrum obtained by passing the light wave through the light wave extraction means is high, and the shape of the spectrum is more desirable.
In the first arrangement, the center wavelengths of the gain medium, the light wave extraction section in the laser output module to which the gain medium belongs, and the light splitting section in the laser output module to which the gain medium belongs are equal.
In the second arrangement, the central wavelengths of the gain medium, the light wave extraction section in the laser output module on the front optical path connected to the laser output module to which the gain medium belongs, and the light splitting section in the laser output module on the front optical path connected to the laser output module to which the gain medium belongs are equal.
When the wavelength interval of the optical wave in the ring resonator is relatively large, a very wide spectrum needs to be generated, so that after the optical wave is subjected to power amplification in the gain medium, the time domain waveform of the optical wave is distorted due to the dispersion and nonlinearity of the medium. Dispersion compensation of the optical wave is therefore required before spectral broadening of the wave. Therefore, a dispersion compensating member may be provided in the laser output assembly. In a specific implementation, the dispersion compensating section may be arranged in front of the spectral broadening section.
Alternatively, in the first arrangement order, the dispersion compensating section is arranged in front of the spectral broadening section, which is arranged in front of the gain medium.
The working principle is as follows: the dispersion compensation component carries out dispersion compensation on the input optical wave, the optical wave obtained through dispersion compensation is sent to the spectrum broadening component, the spectrum broadening component carries out spectrum broadening on the received optical wave, the optical wave obtained through spectrum broadening is sent to the gain medium, and the gain medium carries out power amplification on the received optical wave.
Alternatively, in a second arrangement, the gain medium is arranged before the dispersion compensating section and the dispersion compensating section is arranged before the spectral broadening section.
The working principle is as follows: the gain medium amplifies the power of the input optical wave and sends the optical wave obtained by power amplification to the dispersion compensation component, the dispersion compensation component carries out dispersion compensation on the optical wave obtained by power amplification and sends the optical wave obtained by dispersion compensation to the spectrum broadening component, and the spectrum broadening component carries out spectrum broadening on the received optical wave.
In specific implementations, the optical fiber amplifier may be doped with specific rare earth ions to form a rare earth doped optical fiber, and different rare earth ions may determine the wavelength of light at which the laser operates. For example, the lasers of ytterbium-doped fiber amplifiers operate at about 1 micron wavelength, the lasers of erbium-doped fiber amplifiers operate at about 1.5 micron wavelength, and the lasers of thulium-doped fiber amplifiers operate at about 2 micron wavelength. In practical operation, the rare earth ions doped in the optical fiber amplifier can be selected according to requirements.
When the resonator includes a plurality of laser output components, the rare earth ions doped by the fiber amplifiers are all different.
A structure diagram of a laser capable of outputting across a wavelength band, which is provided by the embodiments of the present application, is described in detail below with reference to a specific embodiment, and fig. 4 shows another structure diagram of a laser capable of outputting across a wavelength band.
The laser can work at three wavelengths of 2000nm, 1550nm and 1060nm, and comprises a thulium-doped optical fiber amplifier 401, a first dispersion compensation optical fiber 402, a first high nonlinear optical fiber 403, a first band-pass filter 404, a first optical coupler 405, an erbium-doped optical fiber amplifier 406, a second dispersion compensation optical fiber 407, a second high nonlinear optical fiber 408, a second band-pass filter 409, a second optical coupler 410, an ytterbium-doped optical fiber amplifier 411, a third dispersion compensation optical fiber 412, a third high nonlinear optical fiber 413, a third band-pass filter 414, a third optical coupler 415, an erbium-doped optical fiber amplifier 416, a fourth dispersion compensation optical fiber 417, a fourth high nonlinear optical fiber 418, a fourth band-pass filter 419 and a fourth optical coupler 420, which are sequentially arranged and form a ring shape.
The working principle can be as follows: after an input optical wave enters the laser capable of outputting in a cross-waveband mode, the thulium-doped optical fiber amplifier 401 firstly performs power amplification on the input optical wave, the optical wave obtained through power amplification is subjected to dispersion compensation through a first dispersion compensation optical fiber 402, the optical wave after dispersion compensation is subjected to spectrum broadening through a first high nonlinear optical fiber 403, the optical wave obtained through spectrum broadening is subjected to a first band pass filter 404 with the central wavelength of 1550nm to obtain an optical wave with the central wavelength of 1550nm, and finally the optical wave is output through a first optical coupler 405 to obtain an optical wave with the central wavelength of 1550nm, the first optical coupler 405 transmits the residual optical wave to an erbium-doped optical fiber amplifier 406, the erbium-doped optical fiber amplifier 406 performs power amplification on the residual optical wave, the optical wave obtained through power amplification is subjected to dispersion compensation through a second dispersion compensation optical fiber 407, the optical wave after dispersion compensation is subjected to spectrum broadening through a second high nonlinear optical fiber 408, the optical wave obtained by spectral broadening passes through a band-pass filter 409 with the central wavelength of 1060nm to obtain an optical wave with the central wavelength of 1060nm, and is finally output by a second optical coupler 410 to obtain an optical wave with the central wavelength of 1060nm, the second optical coupler 410 sends the residual optical wave to an ytterbium-doped optical fiber amplifier 411, the ytterbium-doped optical fiber amplifier 411 performs power amplification on the residual optical wave, the optical wave obtained by power amplification is subjected to dispersion compensation by a third dispersion compensation optical fiber 412, the optical wave after dispersion compensation is subjected to spectral broadening by a third high nonlinear optical fiber 413, the optical wave obtained by spectral broadening passes through a band-pass filter 414 with the central wavelength of 1550nm to obtain an optical wave with the central wavelength of 1550nm, and is finally output by a third optical coupler 415 to obtain an optical wave with the central wavelength of 1550nm, and the third optical coupler 415 sends the residual optical wave to an erbium-doped optical fiber amplifier 416, the erbium-doped fiber amplifier 416 amplifies the power of the remaining light wave, the light wave obtained through power amplification is subjected to dispersion compensation through a fourth dispersion compensation fiber 417, the light wave subjected to dispersion compensation is subjected to spectrum broadening through a fourth high nonlinear fiber 418, the light wave obtained through spectrum broadening is subjected to a band-pass filter 419 with the central wavelength of 2000nm to obtain a light wave with the central wavelength of 2000nm, the light wave is finally output through a fourth optical coupler 420 to obtain a light wave with the central wavelength of 2000nm, and the fourth optical coupler 420 sends the remaining light wave to the thulium-doped fiber amplifier 401, and the steps are sequentially circulated.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the present invention in its spirit and scope. Are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A laser capable of outputting in a cross-waveband mode comprises a resonant cavity and is characterized in that the resonant cavity is a ring-shaped cavity and comprises a plurality of laser output assemblies, and the laser output assemblies are sequentially connected end to form a ring; each laser output component outputs light waves with corresponding preset wavelengths; the laser output components respectively process input light waves to obtain light waves of different wave bands, so that the light waves of different wave bands are output in the same laser;
the input light wave of the laser capable of outputting across wave bands is converted back and forth on light waves with different wavelengths, so that the light waves of a plurality of wave bands are subjected to coherent action;
the laser output assembly includes: the dispersion compensation component, the gain medium, the spectrum broadening component, the light wave extraction component and the light splitting component;
the gain medium is used for carrying out power amplification on the input light wave and the frequency spectrum broadening component is used for carrying out frequency spectrum broadening on the input light wave to obtain a target light wave, and the target light wave is sent to the light wave extraction component; the target optical wave comprises optical waves with preset wavelengths corresponding to the spectrum broadening component and the laser output component to which the gain medium belongs;
the gain medium is doped with different rare earth ions to obtain light waves in different wave band ranges, and the gain medium in different laser output assemblies is different;
the light wave extraction component extracts light waves with preset wavelengths corresponding to the laser output assemblies to which the light wave extraction component belongs from the target light waves and sends the extracted light waves to the light splitting component;
the light splitting component performs light splitting processing on received light waves, uses the obtained partial light waves as output light waves of the laser output assembly to which the light splitting component belongs, and sends the rest light waves to other laser output assemblies;
each laser output assembly is sequentially arranged according to a first sequence of a dispersion compensation component, a spectrum broadening component, a gain medium, an optical wave extraction component and a light splitting component, the dispersion compensation component performs dispersion compensation on input optical waves and sends the optical waves obtained through dispersion compensation to the spectrum broadening component, and the spectrum broadening component performs spectrum broadening on the optical waves obtained through dispersion compensation and sends the optical waves obtained through spectrum broadening to the gain medium for power amplification; or each laser output component is sequentially arranged according to a second sequence of a gain medium, a dispersion compensation component, a spectrum widening component, an optical wave extraction component and a light splitting component, the gain medium amplifies the power of input optical waves and sends the optical waves obtained through power amplification to the dispersion compensation component, and the dispersion compensation component performs dispersion compensation on the optical waves obtained through power amplification and sends the optical waves obtained through dispersion compensation to the spectrum widening component for spectrum widening.
2. The laser of claim 1 capable of out-of-band across a wavelength band, comprising: the gain medium in each laser output assembly is used for power amplification of the optical wave of the corresponding wavelength.
3. The laser according to claim 1, wherein when the laser output module is sequentially arranged in the first order of the dispersion compensation unit, the spectral broadening unit, the gain medium, the optical wave extraction unit, and the beam splitting unit, the center wavelengths of the gain medium, the optical wave extraction unit in the laser output module to which the gain medium belongs, and the beam splitting unit in the laser output module to which the gain medium belongs are equal.
4. The laser according to claim 1, wherein when the laser output modules are arranged in the second order of the gain medium, the dispersion compensation module, the spectral broadening module, the optical wave extraction module, and the light splitting module, the center wavelengths of the gain medium, the optical wave extraction module in the laser output module on the front optical path connected to the laser output module to which the gain medium belongs, and the light splitting module in the laser output module on the front optical path connected to the laser output module to which the gain medium belongs are equal.
5. The out-of-band-pass laser of claim 1, wherein the spectral broadening component is a highly nonlinear optical fiber or optical waveguide.
6. The multiband output laser of claim 1, wherein the beam splitting component comprises an optical coupler or a beam splitter.
7. The laser of claim 1, wherein the optical wave extraction component comprises a band pass filter.
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