CN114597742A - Inner cavity type 1270nm laser based on phosphorus-doped optical fiber and annular mirror - Google Patents
Inner cavity type 1270nm laser based on phosphorus-doped optical fiber and annular mirror Download PDFInfo
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- CN114597742A CN114597742A CN202111472966.1A CN202111472966A CN114597742A CN 114597742 A CN114597742 A CN 114597742A CN 202111472966 A CN202111472966 A CN 202111472966A CN 114597742 A CN114597742 A CN 114597742A
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- optical fiber
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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
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06712—Polarising fibre; Polariser
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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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094042—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a fibre laser
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094065—Single-mode pumping
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention discloses an inner cavity type 1270nm laser based on a phosphorus-doped optical fiber and a ring mirror, which comprises a pump laser and a linear resonant cavity formed by connecting a beam combiner, an ytterbium-doped optical fiber, a phosphorus-doped optical fiber, an optical fiber grating, a wavelength division multiplexer and the ring mirror, wherein the pump light is reflected by the optical fiber grating and the ring mirror to enable the pump light to carry out oscillation gain through the ytterbium-doped optical fiber and the phosphorus-doped optical fiber, and can be used for generating laser output with the wavelength of 1270 nm. The 1270nm laser which can be used for photodynamic research and application is not mature at present, and especially the fiber laser with the output wavelength near 1270nm is widely concerned by people in recent years. The inner cavity type 1270nm laser based on the phosphorus-doped optical fiber and the annular mirror can be applied to the fields of clinical medicine, laser physiotherapy and the like.
Description
Technical Field
The invention belongs to the technical field of laser technology and nonlinear optics thereof, and particularly relates to an inner cavity type 1270nm laser based on a phosphorus-doped optical fiber and an annular mirror.
Background
Fiber lasers have been extensively studied for their competitive properties of compact structure, low cost, high pulse energy, high peak power, etc. Photodynamic therapy (PDT) in particular has achieved significant success in the treatment of malignant tumors and other benign conditions. Drug-free PDT attempts to directly excite oxygen molecules in the tissue to an excited state using laser light near 1270nm wavelength, producing a photodynamic therapeutic effect. The laser irradiation at 1270nm can avoid the side effect caused by photosensitive medicine, increase the treatment depth and reduce the damage to other normal tissues. The 1270nm lasers currently available for photodynamic research and application are not mature. Due to the application prospect in the field of photodynamic therapy, lasers, particularly fiber lasers, with the output wavelength near 1270nm have attracted much attention in recent years.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an inner cavity type 1270nm laser based on a phosphorus-doped optical fiber and a ring mirror, which solves the problems mentioned in the background technology.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention provides an inner cavity type 1270nm laser based on a phosphorus-doped optical fiber and an annular mirror, which comprises the following components: comprises a pump laser and a linear resonant cavity formed by connecting a beam combiner, an ytterbium-doped optical fiber, a phosphorus-doped optical fiber, an optical fiber grating, a wavelength division multiplexer and an annular mirror. The pump laser is connected to the beam combiner through an optical fiber.
Preferably, the pump laser is used for emitting pump light with a center wavelength of 980nm, and energy output by the pump laser is absorbed by the ytterbium-doped fiber and the phosphorus-doped fiber and forms population inversion.
Preferably, the light beam of the pumping source is reflected by the fiber grating and the ring mirror to perform oscillation gain through the ytterbium-doped fiber and the phosphorus-doped fiber.
Preferably, the output end of the phosphorus-doped optical fiber is cut at 15 degrees, so that laser in the reflection cavity is prevented.
Preferably, the fiber grating is a high-reflection fiber chirped bragg grating, the reflection wavelength is 1087nm, the reflectivity is greater than 99%, and the bandwidth is less than 2 nm.
Preferably, the ring mirror is an output coupler with a coupling ratio of 50:50, two ends of which are connected, and two ends of which are connected with output optical fibers to form the optical fiber ring mirror.
Compared with the prior art, the invention has the following beneficial effects:
the pump light is coupled into the ytterbium-doped fiber and the phosphorus-doped fiber in a coupling mode, the ytterbium-doped fiber and the phosphorus-doped fiber are excited by a pump source, the fiber grating and the annular mirror control the output of the laser with the wavelength of 1270nm, and the 1270nm laser is generated in a stimulated radiation amplification mode, so that the beam quality and the efficiency of the 1270nm laser are improved.
Drawings
FIG. 1 is a schematic diagram of an inner cavity 1270nm laser based on a phosphorus doped fiber and a ring mirror according to the present invention.
A description of the reference numerals;
1. a pump source; 2. a beam combiner; 3. ytterbium-doped optical fibers; 4. a phosphorus-doped optical fiber; 5. a fiber grating; 6. a wavelength division multiplexer; 7. a ring mirror.
Detailed Description
The following are preferred embodiments of the present invention, and it should be noted that it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents. Such modifications and refinements are also considered to be within the scope of the present invention.
Referring to fig. 1, the present invention provides an intracavity 1270nm laser based on a phosphorus doped fiber and a ring mirror: comprises a pump laser and a linear resonant cavity formed by connecting a beam combiner, an ytterbium-doped optical fiber, a phosphorus-doped optical fiber, an optical fiber grating, a wavelength division multiplexer and an annular mirror. The pump laser is connected to the beam combiner through an optical fiber.
The pump laser (1) is a semiconductor laser, the central wavelength of the pump laser is 980nm, the energy output by the pump laser (1) is absorbed by the ytterbium-doped optical fiber (3) and the phosphorus-doped optical fiber (4) and forms population inversion
The pump laser (1) is connected to the beam combiner (2) through an optical fiber, so that the pump light enters into the cavity.
The ytterbium-doped optical fiber (3) and the phosphorus-doped optical fiber (4) are gain optical fibers.
The wavelength division multiplexer (6) is a 1087/1130-1300nm broadband wavelength division multiplexer, and the input end of the wavelength division multiplexer is 1087nm laser.
The annular mirror (7) is an output coupler with the coupling ratio of 50:50 and two ends connected, and output heads at two ends are connected to form the optical fiber annular mirror.
The pump laser (1) is connected with a first input end of the beam combiner (2), a first output end of the beam combiner (2) is connected with one end of the ytterbium-doped optical fiber (3), the other end of the ytterbium-doped optical fiber (3) is connected with one end of the phosphorus-doped optical fiber (4), and the other end of the phosphorus-doped optical fiber is used for outputting and cutting at 15 degrees. The second output end of the beam combiner (2) is connected with one section of the fiber bragg grating (5), the other end of the fiber bragg grating (5) is connected with the first input end of the wavelength division multiplexer (6), the first output end of the wavelength division multiplexer (6) is connected with the annular mirror (7), and the second output end of the wavelength division multiplexer (6) is cut by 15 degrees.
The pump laser enters the ytterbium-doped fiber and the phosphorus-doped fiber in a coupling mode through a beam combiner, the ytterbium-doped fiber and the phosphorus-doped fiber are excited by the pump laser, the fiber grating and the annular mirror control the output of the laser with the wavelength of 1270nm, and the 1270nm laser is generated in a stimulated radiation amplification mode.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An intracavity 1270nm laser based on phosphorus-doped optical fiber and an annular mirror, which is characterized in that: the laser comprises a pumping laser (1) and a linear resonant cavity which is formed by connecting a beam combiner (2), an ytterbium-doped optical fiber (3), a phosphorus-doped optical fiber (4), a fiber grating (5), a wavelength division multiplexer (6) and an annular mirror (7), wherein the output end of the phosphorus-doped optical fiber (4) is cut by 15 degrees.
2. The intracavity 1270nm laser based on a phosphorus doped fiber and a ring mirror as claimed in claim 1, wherein: the pump laser (1) is connected with a first input end of the beam combiner (2), a first output end of the beam combiner (2) is connected with one end of the ytterbium-doped optical fiber (3), the other end of the ytterbium-doped optical fiber (3) is connected with one end of the phosphorus-doped optical fiber (4), and the other end of the phosphorus-doped optical fiber is used for outputting laser and cutting at 15 degrees. The second output end of the beam combiner (2) is connected with one section of the fiber bragg grating (5), the other end of the fiber bragg grating (5) is connected with the first input end of the wavelength division multiplexer (6), the first output end of the wavelength division multiplexer (6) is connected with the annular mirror (7), and the second output end of the wavelength division multiplexer (6) is cut by 15 degrees.
3. The intracavity 1270nm laser based on a phosphorus doped fiber and a ring mirror as claimed in claim 1, wherein: the output center wavelength of the pump laser (1) is 980nm, pump light is connected to the wavelength division multiplexer through single-mode fiber and enters the cavity, and the energy output by the pump laser (1) is absorbed by the ytterbium-doped fiber (3) and the phosphorus-doped fiber (4) and forms population inversion.
4. The intracavity 1270nm laser based on a phosphorus doped fiber and a ring mirror as claimed in claim 1, wherein: the output end of the phosphorus-doped optical fiber (4) is cut at 15 degrees in order to prevent laser reflection.
5. The intracavity 1270nm laser based on a phosphorus-doped optical fiber and a toroidal mirror as claimed in claim 1, wherein: the optical fiber grating (5) is a high-reflection optical fiber chirped Bragg grating, the reflection wavelength is 1087nm, the reflectivity is more than 99%, and the bandwidth is less than 2 nm.
6. The intracavity 1270nm laser based on a phosphorus doped fiber and a ring mirror as claimed in claim 1, wherein: the wavelength division multiplexer (6) is an 1087/1130-1300nm broadband wavelength division multiplexer, the input end of the wavelength division multiplexer is 1087nm laser, and one end outside the cavity is cut for 15 degrees so as to prevent laser reflection.
7. The intracavity 1270nm laser based on a phosphorus doped fiber and a ring mirror as claimed in claim 1, wherein: the annular mirror (7) is an output coupler with the coupling ratio of 50:50 and two ends connected, and output optical fibers at two ends are connected to form the optical fiber annular mirror.
8. The use of the phosphorus-doped fiber and ring mirror based intracavity 1270nm laser according to claim 1 in the fields of surgical medicine and laser therapy, diagnosis and physical therapy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111472966.1A CN114597742A (en) | 2021-12-06 | 2021-12-06 | Inner cavity type 1270nm laser based on phosphorus-doped optical fiber and annular mirror |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111472966.1A CN114597742A (en) | 2021-12-06 | 2021-12-06 | Inner cavity type 1270nm laser based on phosphorus-doped optical fiber and annular mirror |
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| Publication Number | Publication Date |
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| CN114597742A true CN114597742A (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111472966.1A Withdrawn CN114597742A (en) | 2021-12-06 | 2021-12-06 | Inner cavity type 1270nm laser based on phosphorus-doped optical fiber and annular mirror |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080287932A1 (en) * | 2004-01-14 | 2008-11-20 | Jaouad Zemmouri | Apparatus and Method for Treatment and Particularly Laser Treatment of a Cancer or Precancerous Condition |
| CN106299988A (en) * | 2016-10-28 | 2017-01-04 | 电子科技大学 | A kind of cascaded-output fiber Raman accidental laser |
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2021
- 2021-12-06 CN CN202111472966.1A patent/CN114597742A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080287932A1 (en) * | 2004-01-14 | 2008-11-20 | Jaouad Zemmouri | Apparatus and Method for Treatment and Particularly Laser Treatment of a Cancer or Precancerous Condition |
| CN106299988A (en) * | 2016-10-28 | 2017-01-04 | 电子科技大学 | A kind of cascaded-output fiber Raman accidental laser |
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Application publication date: 20220607 |
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