CN117154516A - Fiber laser capable of selecting wavelength or outputting multiple wavebands simultaneously - Google Patents
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- 239000000835 fiber Substances 0.000 title claims abstract description 76
- 239000013307 optical fiber Substances 0.000 claims abstract description 49
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Classifications
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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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- 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
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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
Abstract
The invention discloses a fiber laser capable of selecting wavelength or outputting multiple bands simultaneously, and relates to the technical field of fiber lasers. The two optical fiber Sagnac rings are arranged, and laser resonant cavities are formed at the two ends of the linear cavity optical fiber laser; the pump light source is 976nm pump laser which provides pump light for the fiber laser through the pump beam combiner; two output couplers are arranged, and the power of laser output by each output coupler is different; the wavelength selectors are multiple, the wavelengths of the output laser of different wavelength selectors are different, and the wavelength of the output laser can be selected at will. The invention can output near infrared two-area multiband laser at the same time, and can output any wavelength laser.
Description
Technical Field
The invention relates to the technical field of fiber lasers, in particular to a fiber laser capable of selecting wavelengths or outputting multiple bands simultaneously.
Background
The multiband optical fiber laser can output a plurality of wavelengths with specific wavelength intervals at the same time, and has wide application in the fields of wavelength division multiplexing systems, optical fiber sensing, optical fiber communication networks, optical frequency measurement, photomedicine and the like. The output characteristics of the multi-wavelength fiber laser depend on the used laser, the absorption intensity of water, hemoglobin and melanin in the human body is different corresponding to the different wavelengths of the near infrared band, the penetration depth of the laser is also different, and the laser with different wavelengths is also needed for different diseases. With the continuous development and application of laser technology, laser medical technology plays an increasingly important role in the medical field. At present, certain achievements are achieved in the process of obtaining laser with a single wave band and a specific wavelength, but the process of obtaining laser with a specific wave band in a multi-wave band and a near infrared two-region is also very difficult, and the application of the laser in clinical medicine is restricted.
As described above, the current near-infrared two-region multiband laser and near-infrared two-region specific wavelength laser acquisition are not sufficient, and cannot be directly obtained by conventional semiconductor lasers, solid-state lasers, and other methods.
Disclosure of Invention
The invention provides a fiber laser capable of selecting wavelength or outputting multiple wave bands simultaneously, which can output near infrared two-region multiple wave band laser simultaneously, and can also output laser with any wave band, thereby solving the problem that the lasers such as a semiconductor laser, a solid laser and the like in the prior art can only emit laser with specific single wave band and can not realize the simultaneous output of multiple wave bands.
In order to solve the technical problems, the invention adopts the following technical scheme: a fiber laser capable of selecting wavelength or outputting multiple bands simultaneously comprises a fiber Sagnac ring, a pump light source, a pump beam combiner, a gain fiber, a fiber grating, an isolator, a mode field matcher, a Raman fiber, an output coupler and a wavelength selector. Wherein,
the number of the optical fiber Sagnac rings is two, and the first optical fiber Sagnac ring is connected with the optical fiber grating through an all-optical fiber structure to form a laser resonant cavity; the fiber grating and the fiber Sagnac ring are connected through an all-fiber structure to form another laser resonant cavity;
the output couplers output 10% of laser in the laser cavity, and the rest 90% of laser still oscillates in the laser resonant cavity; the second output coupler is used for outputting 20% of laser light outside the laser to obtain multiband laser light;
seven wavelength selectors are arranged, and the first wavelength selector obtains laser with specific wavelength of 1087 nm; the second wavelength selector obtains laser with a specific wavelength of 1140 nm; the wavelength selector III obtains the laser with the specific wavelength of 1200 nm; the wavelength selector IV obtains laser with the specific wavelength of 1270 nm; the wavelength selector five obtains laser with a specific wavelength of 1342 nm; the wavelength selector six obtains the laser with the specific wavelength of 1425 nm; the wavelength selector seven obtains a laser light with a specific wavelength of 1515nm.
Each wavelength selector can output laser with different wavelengths, the effect of outputting specific wavelengths is realized in a wavelength selection mode, and the output coupler II can output multiband laser.
Further, the pump light source couples 976nm pump light into the laser through the pump beam combiner, and provides pump laser for a linear resonant cavity composed of an optical fiber Sagnac ring I, the pump beam combiner, a gain optical fiber and an optical fiber grating, so as to generate 1087nm laser oscillation in the linear resonant cavity. Through the pump beam combiner, 976nm pump laser can be coupled to a resonant cavity formed by an optical fiber Sagnac ring I, the pump beam combiner, a gain optical fiber and an optical fiber grating to obtain 1087nm laser, pump light is provided for a Raman optical fiber, and multiband laser is obtained through Raman effect.
Further, the gain fiber is ytterbium-doped fiber, the fiber core diameter is 10 microns, and the cladding diameter is 130 microns. The ytterbium-doped fiber plays a role of a gain medium in the fiber laser, and provides the gain medium for generating 1087nm laser by realizing energy conversion from pump light to signal light and amplifying the pump light energy in the resonant cavity.
Further, the fiber grating is a high reflectivity grating with 90% reflectivity for 1087nm laser light. The working wavelength of the fiber grating is 1087nm, wherein 90% of laser oscillates in a resonant cavity formed by the fiber grating and the fiber Sagnac ring, and 10% of 1087nm laser provides pump light for the Raman fiber through the fiber grating.
Further, the device also comprises another linear laser resonant cavity formed by the fiber bragg grating, the isolator, the mode field matcher, the Raman fiber, the first output coupler and the second fiber Sagnac ring. The 10% 1087nm laser passes through the fiber grating and then is used as the pump light of the linear resonant cavity, and multiband laser can be generated through the resonant cavity.
Further, the optical fiber core diameter matched with the mode field matcher is 10/130 micrometers and 6/125 micrometers, and 1087nm laser can be transmitted without loss after passing through the mode field matcher. The matching problem between different types of optical fibers can be realized through the mode field matcher, so that the transmission of laser in the optical fibers has no loss.
Further, the raman fiber provides raman effect for a multiband laser, using a length of 1000 meters. The 1087nm laser can generate multiband laser after pumping the Raman fiber, and the specific laser wavelengths are 1087nm, 1140nm, 1200nm, 1270nm, 1342nm, 1425nm and 1515nm.
Further, the coupling ratio of the output coupler I is 1:9, wherein 90% of the multiband laser light oscillates in the linear resonant cavity, and 10% of the multiband laser light is output out of the laser cavity. The output coupler is a semi-transparent dichroic mirror used in the laser cavity and functions to partially transmit the optical power in the laser cavity to obtain the useful output of the laser.
Further, the coupling ratio of the output coupler II is 2:8, wherein 80% of the multiband laser light is input to the first wavelength selector, and 20% of the multiband laser light output laser cavities are externally used for obtaining multiband laser light which is output simultaneously. The output coupler can output multi-band laser at the same time.
Further, after the output coupler II outputs 80% of multiband laser, the first wavelength selector can obtain the laser with the specific wavelength of 1087 nm; the second wavelength selector can obtain laser with the specific wavelength of 1140 nm; the wavelength selector III can obtain the laser with the specific wavelength of 1200 nm; the wavelength selector IV can obtain laser with the specific wavelength of 1270 nm; the wavelength selector five can obtain laser with the specific wavelength of 1342 nm; the wavelength selector six can obtain the laser with the specific wavelength of 1425 nm; the wavelength selector seven (18) can obtain the laser with the specific wavelength of 1515nm. Through seven wavelength selectors, we can obtain the laser with specific single wavelength, and achieve the effect of selecting wavelength.
The optical fiber laser capable of selecting wavelength or outputting multiple wavebands simultaneously has the following beneficial effects: a plurality of laser output ports for generating laser with different wavelengths are arranged, and the lasers of 1087nm, 1140nm, 1200nm, 1270nm, 1342nm, 1425nm and 1515nm can be respectively obtained outside the laser cavity, and the lasers of 1087nm, 1140nm, 1200nm, 1270nm, 1342nm, 1425nm and 1515nm can be simultaneously obtained.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are needed to be used in the embodiments of the present invention will be briefly described, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a fiber laser of the present invention capable of selecting wavelengths or outputting multiple bands simultaneously;
the optical fiber system comprises a first 1-optical fiber Sagnac ring, a 2-pumping light source, a 3-pumping beam combiner, a 4-gain optical fiber, a 5-optical fiber grating, a 6-isolator, a 7-mode field matcher, an 8-Raman optical fiber, a first 9-output coupler, a second 10-optical fiber Sagnac ring, a second 11-output coupler, a first 12-wavelength selector, a second 13-wavelength selector, a third 14-wavelength selector, a fourth 15-wavelength selector, a fifth 16-wavelength selector, a sixth 17-wavelength selector and a seventh 18-wavelength selector.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The technical scheme provided by the embodiment of the invention is described below with reference to the accompanying drawings.
As shown in fig. 1, the present invention is a fiber laser capable of selecting wavelength or outputting multiple bands simultaneously, comprising a fiber Sagnac loop 1, a pump light source 2, a pump beam combiner 3, a gain fiber 4, a fiber grating 5, an isolator 6, a mode field matcher 7, a raman fiber 8, an output coupler 9, a fiber Sagnac loop 10, an output coupler 11, a wavelength selector 12, a wavelength selector 13, a wavelength selector 14, a wavelength selector 15, a wavelength selector 16, a wavelength selector 17, and a wavelength selector 18; wherein,
the number of the optical fiber Sagnac rings is two, and the optical fiber Sagnac ring 1 and the optical fiber grating 5 are connected through an all-optical fiber structure to form a laser resonant cavity; the fiber grating 5 and the fiber Sagnac ring II 10 are connected through an all-fiber structure to form another laser resonant cavity;
the two output couplers are arranged, the first output coupler 9 outputs 10% of laser in the laser cavity, and the rest 90% of laser still oscillates in the laser resonant cavity; the second output coupler 11 is used for obtaining multiband laser by using 20% of laser output lasers;
seven wavelength selectors are arranged, and the first wavelength selector 12 obtains laser with the specific wavelength of 1087 nm; the second wavelength selector 13 obtains laser with a specific wavelength of 1140 nm; the third wavelength selector 14 obtains the laser with the specific wavelength of 1200 nm; the wavelength selector IV 15 obtains laser with the specific wavelength of 1270 nm; the wavelength selector five 16 obtains laser with a specific wavelength of 1342 nm; the wavelength selector six 17 obtains the laser with the specific wavelength of 1425 nm; the wavelength selector seven 18 obtains a laser light with a specific wavelength of 1515nm.
The pump light source 2 couples 976nm pump light into the laser through the pump beam combiner 3, provides pump laser for a linear resonant cavity composed of an optical fiber Sagnac ring 1, the pump beam combiner 3, a gain optical fiber 4 and an optical fiber grating 5, and generates 1087nm laser to oscillate in the linear resonant cavity.
The gain fiber 4 is ytterbium-doped fiber, the fiber core diameter is 10 microns, and the cladding diameter is 130 microns.
The fiber grating 5 is a high-reflectivity grating, and the reflectivity of the fiber grating to 1087nm laser is 90%.
The 1087nm laser generated by the device has 10% output, and the Raman fiber 8 pumped by the isolator 6 and the mode field matcher 7 generates multiband laser through Raman effect, and the fiber bragg grating 5, the isolator 6, the mode field matcher 7, the Raman fiber 8, the output coupler I9 and the fiber Sagnac ring II 10 form another linear laser resonant cavity.
The core diameter of the optical fiber matched with the mode field matcher 7 is 10/130 micrometers and 6/125 micrometers, and 1087nm laser can be transmitted without loss after passing through the mode field matcher 7.
The raman fiber 8 provides a raman effect for a multiband laser, using a length of 1000 meters.
The coupling proportion of the first output coupler 9 is 1:9, wherein 90% of the multiband laser light oscillates in the linear resonant cavity, and 10% of the multiband laser light is output out of the laser cavity.
The coupling proportion of the second output coupler 11 is 2:8, wherein 80% of the multiband laser light is input to the first wavelength selector 12, and 20% of the multiband laser light is output outside the laser cavity for obtaining multiband laser light which is output simultaneously.
Seven wavelength selectors are arranged, 80% of multiband laser outputs are output after the output coupler II 11, and the wavelength selector I12 can obtain laser with specific wavelength of 1087 nm; the second wavelength selector 13 can obtain laser with a specific wavelength of 1140 nm; the wavelength selector III 14 can obtain the laser with the specific wavelength of 1200 nm; the wavelength selector IV 15 can obtain laser with the specific wavelength of 1270 nm; the wavelength selector five 16 can obtain laser with a specific wavelength of 1342 nm; the wavelength selector six 17 can obtain the laser with the specific wavelength of 1425 nm; the wavelength selector seven 18 can obtain the laser with the specific wavelength of 1515nm.
The optical fiber laser capable of selecting wavelength or outputting multiple wavebands simultaneously has the following beneficial effects: a plurality of laser output ports for generating laser beams with different wavelengths are arranged, and the laser beams with 1087nm, 1140nm, 1200nm, 1270nm, 1342nm, 1425nm and 1515nm can be respectively obtained outside the laser cavity. Lasers output by 1087nm, 1140nm, 1200nm, 1270nm, 1342nm, 1425nm and 1515nm can also be obtained simultaneously.
It should be understood that the invention is not limited to the particular arrangements and instrumentality described above and shown in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between steps, after appreciating the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented in hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine readable medium or transmitted over transmission media or communication links by a data signal carried in a carrier wave. A "machine-readable medium" may include any medium that can store or transfer information. Examples of machine-readable media include electronic circuitry, semiconductor Memory devices, read-Only Memory (ROM), flash Memory, removable Read-Only Memory (Erasable Read Only Memory, EROM), floppy disks, compact discs (Compact Disc Read-Only Memory, CD-ROM), optical discs, hard disks, fiber optic media, radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranets, etc.
It should also be noted that the exemplary embodiments mentioned in this disclosure describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.
Aspects of the present disclosure are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions/acts specified in the flowchart and/or block diagram block or blocks. Such a processor may be, but is not limited to being, a general purpose processor, a special purpose processor, an application specific processor, or a field programmable logic circuit. It will also be understood that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware which performs the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In the foregoing, only the specific embodiments of the present invention are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present invention is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and they should be included in the scope of the present invention.
Claims (10)
1. A fiber laser capable of selecting wavelengths or simultaneously outputting multiple bands, the fiber laser comprising: the optical fiber Sagnac loop I (1), a pump light source (2), a pump beam combiner (3), a gain optical fiber (4), an optical fiber grating (5), an isolator (6), a mode field matcher (7), a Raman optical fiber (8), an output coupler I (9), an optical fiber Sagnac loop II (10), an output coupler II (11), a wavelength selector I (12), a wavelength selector II (13), a wavelength selector III (14), a wavelength selector IV (15), a wavelength selector V (16), a wavelength selector VI (17) and a wavelength selector V (18); wherein,
the optical fiber Sagnac ring I (1) and the optical fiber grating (5) are connected through an all-fiber structure to form a laser resonant cavity, and the optical fiber grating (5) and the optical fiber Sagnac ring II (10) are connected through the all-fiber structure to form another laser resonant cavity;
the first output coupler (9) outputs 10% of laser in the laser cavity, the rest 90% of laser oscillates in the laser resonant cavity, and the second output coupler (11) outputs 20% of laser to the outside of the laser to obtain multiband laser;
the first wavelength selector (12) is used for obtaining laser with a specific wavelength of 1087 nm; the second wavelength selector (13) is used for obtaining laser with a specific wavelength of 1140 nm; the wavelength selector III (14) is used for obtaining the laser with the specific wavelength of 1200 nm; a fourth wavelength selector (15) is used for obtaining laser with a specific wavelength of 1270 nm; a fifth wavelength selector (16) is used for obtaining laser with a specific wavelength of 1342 nm; a wavelength selector six (17) for obtaining a laser light with a specific wavelength of 1425 nm; the wavelength selector seven (18) is used to obtain a laser light with a specific wavelength of 1515nm.
2. The fiber laser of claim 1, wherein the pump light source (2) couples 976nm pump light into the laser through the pump combiner (3), and the linear resonant cavity composed of the fiber Sagnac loop one (1), the pump combiner (3), the gain fiber (4) and the fiber grating (5) provides pump laser light, so as to generate 1087nm laser light to oscillate in the linear resonant cavity.
3. A selectable wavelength or simultaneous output multiband optical fiber laser according to claim 2, wherein the gain fiber (4) is an ytterbium doped fiber with a core diameter of 10 microns and a cladding diameter of 130 microns.
4. A selectable wavelength or simultaneous output multiband fiber laser according to claim 2, wherein the fiber grating (5) is a high reflectivity grating with 90% reflectivity for 1087nm laser light.
5. The optical fiber laser capable of selecting wavelengths or outputting multiple bands simultaneously according to claim 2, wherein the 1087nm laser generated by the optical fiber laser has 10% output, the raman fiber (8) is pumped by the isolator (6) and the mode field matcher (7) to generate the multiple band laser through the raman effect, and the fiber grating (5), the isolator (6), the mode field matcher (7), the raman fiber (8), the output coupler one (9) and the fiber Sagnac loop two (10) form another linear laser resonant cavity.
6. The fiber laser capable of selecting wavelengths or outputting multiple bands simultaneously according to claim 5, wherein the fiber core diameter matched by the mode field matcher (7) is 10/130 micrometers and 6/125 micrometers, and 1087nm laser can be transmitted without loss after passing through the mode field matcher (7).
7. A selectable wavelength or simultaneous multi-band fiber laser according to claim 5, wherein the raman fiber (8) provides a raman effect for the multi-band laser, using a length of 1000 meters.
8. A selectable wavelength or simultaneous output multiband optical fiber laser according to claim 5, wherein the output coupler one (9) has a coupling ratio of 1:9, wherein 90% of the multiband laser light oscillates in the linear resonant cavity, and 10% of the multiband laser light is output out of the laser cavity.
9. A selectable wavelength or simultaneous output multiband optical fiber laser according to claim 1, wherein the coupling ratio of the output coupler two (11) is 2:8, wherein 80% of the multiband laser light is input to the first wavelength selector (12), and 20% of the multiband laser light is output outside the laser cavity for obtaining multiband laser light which is output simultaneously.
10. The fiber laser capable of selecting wavelengths or outputting multiple wavebands simultaneously according to claim 1, wherein seven wavelength selectors are provided, and after 80% of the multiple wavebands are output through the output coupler two (11), the first wavelength selector (12) can obtain the laser with the specific wavelength of 1087 nm; the second wavelength selector (13) can obtain laser with a specific wavelength of 1140 nm; the wavelength selector III (14) can obtain the laser with the specific wavelength of 1200 nm; the wavelength selector IV (15) can obtain laser with the specific wavelength of 1270 nm; the wavelength selector five (16) can obtain the laser with the specific wavelength of 1342 nm; the wavelength selector six (17) can obtain the laser with the specific wavelength of 1425 nm; the wavelength selector seven (18) can obtain the laser with the specific wavelength of 1515nm.
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| CN115241722A (en) * | 2022-08-09 | 2022-10-25 | 浙江领康医疗器械有限公司 | 1.1-1.6 micron all-fiber random Raman laser based on Sagnac ring |
| CN116826495A (en) * | 2023-08-25 | 2023-09-29 | 山东弘信光学科技有限公司 | Pulse Raman fiber laser with tunable and selectable multiple wavelengths |
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|---|---|---|---|---|
| US6426965B1 (en) * | 1999-12-27 | 2002-07-30 | Electronics And Telecommunications Research Institute | Optical fiber cascaded Raman laser scheme |
| CN115173217A (en) * | 2022-08-09 | 2022-10-11 | 浙江领康医疗器械有限公司 | Semi-open-cavity type multiband random Raman fiber laser |
| CN115241722A (en) * | 2022-08-09 | 2022-10-25 | 浙江领康医疗器械有限公司 | 1.1-1.6 micron all-fiber random Raman laser based on Sagnac ring |
| CN116826495A (en) * | 2023-08-25 | 2023-09-29 | 山东弘信光学科技有限公司 | Pulse Raman fiber laser with tunable and selectable multiple wavelengths |
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| CN117154516B (en) | 2024-01-26 |
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