CN217692083U - Wide-temperature constant-power self-frequency-doubling laser - Google Patents
Wide-temperature constant-power self-frequency-doubling laser Download PDFInfo
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- 238000005859 coupling reaction Methods 0.000 claims abstract description 39
- 239000013078 crystal Substances 0.000 claims abstract description 39
- 230000003287 optical effect Effects 0.000 claims abstract description 29
- 239000011159 matrix material Substances 0.000 claims description 8
- 238000000862 absorption spectrum Methods 0.000 claims description 4
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- 238000005516 engineering process Methods 0.000 description 2
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- 239000002019 doping agent Substances 0.000 description 1
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Abstract
The application relates to a wide-temperature constant-power self-frequency-doubling laser, which comprises a self-frequency-doubling crystal, a laser diode and a power supply, wherein the self-frequency-doubling crystal can convert light emitted by the laser diode into laser with another frequency; the laser pump source can convert the emitted laser through the self-frequency-doubling crystal; the laser compensation pumping source is used for converting the emitted laser through the self-frequency doubling crystal; the light combiner is arranged between the laser pumping source and the self-frequency doubling crystal; the optical feedback component is arranged on one side of the self-frequency doubling crystal for emitting the laser, can detect the power of the laser and feeds the power back to the laser pumping source and the laser compensation pumping source for continuous adjustment; the coupling system is arranged between the laser pumping source and the self-frequency doubling crystal and can couple the light emitted by the laser pumping source; and the second coupling system is arranged between the laser compensation pumping source and the self-frequency doubling crystal and can couple the light emitted by the laser compensation pumping source. The application has the effect of increasing the stability of the laser.
Description
Technical Field
The application relates to the field of laser systems, in particular to a wide-temperature constant-power self-frequency-doubling laser.
Background
So far, there are two main proposals for realizing bright green laser output under high and low temperature conditions, one is through a semiconductor green LD, which has been applied in the market in bulk, but the green output wavelength is also changing with the change of the environmental temperature; the other mode is that an optical feedback mode is added to the solid green laser, when the environment temperature changes, the output power of the laser fluctuates to cause the change of feedback current, and therefore stable power output of the laser is guaranteed by modulating LD power supply parameters.
In view of the above-mentioned related technologies, the inventor believes that in the practical use process, since the frequency doubling material relates to the nonlinear optical frequency conversion technology, the requirement for temperature control is high, and when the ambient temperature is high or low, the output power of the whole laser is easy to be unstable.
SUMMERY OF THE UTILITY MODEL
In order to increase the stability of the laser, the application provides a wide-temperature constant-power self-frequency-doubling laser.
The application provides a wide temperature constant power is from frequency doubling laser adopts following technical scheme:
a wide-temperature constant-power self-frequency-doubling laser comprises
The self-frequency doubling crystal, one, can change the light that the laser diode sends into another frequency and the color is the laser of green;
the laser pump source is used for emitting laser which can be converted through the self-frequency doubling crystal;
the laser compensation pump source is used for converting the emitted laser through a self-frequency doubling crystal;
the light combiner is arranged between the laser pumping source and the self-frequency doubling crystal and can combine light emitted by the laser compensation pumping source with light emitted by the laser pumping source;
the optical feedback assembly is arranged on one side of the self-frequency doubling crystal for emitting laser, can detect the power of the laser and feeds back the power to the laser pumping source and the laser compensation pumping source for continuous adjustment;
the coupling system is one, is arranged between the laser pumping source and the self-frequency doubling crystal, and can couple the light emitted by the laser pumping source;
the coupling system II is arranged between the laser compensation pumping source and the self-frequency doubling crystal and can couple light rays emitted by the laser compensation pumping source;
by adopting the technical scheme, light emitted by the laser pumping source is coupled through the coupling system, light emitted by the laser compensation pumping source is coupled through the coupling system II, then the two light paths are combined through the light combiner, the laser after light combination converts the laser through the self-frequency doubling crystal, the converted laser continues to extend forwards after passing through the optical feedback assembly, the optical feedback assembly can detect the power of the converted laser, and then the power is fed back to the laser pumping source or the laser compensation pumping source according to the power of the laser to adjust the power.
Optionally, the base material of the self-frequency doubling crystal may be Gdcob or Ycob, and the doping ion is one of Nd and Yb.
By adopting the technical scheme, according to the requirement of generating and outputting green light, the matrix material GdCOB or Ycob is used for doping the active ions Nd & lt 3+ & gt or Yb & lt 3+ & gt into the matrix material GdCOB or Ycob, so that the matrix material GdCOB or Ycob has two functions of laser emission and nonlinear optical frequency doubling at the same time, and the requirement of generating green light can be met.
Optionally, the optical feedback module includes a PD component.
By adopting the technical scheme, the PD part is the photodiode, and when laser passes through the PD, photocurrent is generated and then fed back to the laser pumping source or the laser compensation pumping source to adjust the laser power.
Optionally, the coupling system and the coupling system two are single coupling mirrors or double coupling mirrors.
By adopting the technical scheme, the coupling mirror performs coupling operation, light generated by the laser pumping source or the laser compensation pumping source can be coupled into light of the same light path, and energy level conversion is conveniently performed for a moment.
Optionally, an angle between the optical combiner and the light path emitted by the laser pumping source is 45 degrees, and an angle between the light path emitted by the laser compensation pumping source and the optical combiner is 45 degrees.
By adopting the technical scheme, the laser emitted by the laser pumping source and the laser compensation pumping source can be combined through the light combiner, the light combiner is adjusted to 45 degrees, the angles between the light paths of the laser pumping source and the laser compensation pumping source and the light combiner are 45 degrees, and the light combiner is convenient to combine light.
Optionally, the optical feedback component includes a DC/DC chip.
By adopting the technical scheme, the DC/DC chip has the characteristics of high conversion efficiency, small dynamic response and large input voltage range.
Alternatively, the absorption spectrum width of the self-frequency doubling crystal needs to be at least 25nm.
By adopting the technical scheme, when the self-frequency doubling crystal converts laser, the wavelength change of each degree centigrade is 0.25nm, the temperature is 100 ℃, the absorption spectrum width of the self-frequency doubling crystal needs 25nm at least, the thermo-optic coefficient of the self-frequency doubling crystal is small, and therefore the phase mismatch caused by temperature change is small.
In summary, the present application includes at least one of the following beneficial technical effects:
1. light emitted by a laser pumping source is coupled through a coupling system, light emitted by a laser compensation pumping source is coupled through a coupling system II, then two light paths are combined through a light combiner, the laser after light combination converts the laser through a self-frequency doubling crystal, the converted laser continues to extend forwards after passing through an optical feedback assembly, the optical feedback assembly can detect the power of the converted laser, and then the power of the laser is fed back to the laser pumping source or the laser compensation pumping source to adjust the power;
2. the lasers emitted by the laser pumping source and the laser compensation pumping source can be combined through the light combiner, and the light combiner is adjusted to 45 degrees, so that the angles between the light paths of the laser pumping source and the laser compensation pumping source and the light combiner are 45 degrees, and the light combiner can conveniently combine light rays;
3. according to the requirement of generating green light, the matrix material GdCOB or Ycob is used for doping the active ions Nd3+ or Yb3+ into the matrix material GdCOB or Ycob, so that the matrix material GdCOB or Ycob has two functions of laser emission and nonlinear optical frequency doubling at the same time, and the requirement of generating green light can be met.
Drawings
Fig. 1 is an overall schematic diagram of a wide-temperature constant-power self-frequency-doubling laser in this embodiment.
Description of reference numerals: 1. a laser pump source; 2. the coupling system is uniform; 3. a self-frequency doubling crystal; 4. a light combiner; 5. a laser compensation pump source; 6. a second coupling system; 7. an optical feedback assembly.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
The embodiment of the application discloses a wide-temperature constant-power self-frequency-doubling laser.
Referring to fig. 1, a wide-temperature constant-power self-frequency-doubling laser includes a laser pump source 1, the laser pump source 1 is horizontally disposed, a coupling system 2 is disposed on one side of the laser pump source 1, the coupling system 2 may be a single coupling mirror or a double coupling mirror, the coupling system 2 is disposed coaxially with the laser pump source 1, a self-frequency-doubling crystal 3 is disposed on one side of the coupling system 2 away from the laser pump source 1, a substrate matrix material of the self-frequency-doubling crystal 3 may be Gdcob or Ycob, a dopant ion is one of Nd and Yb, an absorption spectrum width of the self-frequency-doubling crystal 3 needs 25nm at least, and the self-frequency-doubling crystal 3 is disposed coaxially with the laser pump source 1; an optical combiner 4 is arranged between the self-frequency doubling crystal 3 and the coupling system 2, and the angle between the optical combiner 4 and the light path emitted by the laser pumping source 1 is 45 degrees; a laser compensation pumping source 5 is arranged on one side of the light combiner 4, the axial direction of the laser compensation pumping source 5 is vertical to the axial direction of the laser pumping source 1, and the angle between the light path emitted by the laser compensation pumping source 5 and the light combiner 4 is 45 degrees; a second coupling system 6 is arranged between the laser compensation pumping sources 5, the second coupling system 6 can be a single coupling mirror or a double coupling mirror, and the second coupling system 6 and the laser compensation pumping sources 5 are arranged coaxially; an optical feedback assembly 7 is arranged on one side, far away from the laser pumping source 1, of the self-frequency doubling crystal 3, the optical feedback assembly 7 is connected with the laser compensation pumping source 5 through an electric wire, and the optical feedback assembly 7 is connected with the laser pumping source 1 through an electric wire.
When the laser coupling system is used, laser emitted by the laser pumping source 1 enters the coupling system 2 to adjust the optical path, and then the laser emitted by the laser pumping source 1 is coupled through the coupling system 2 to enable the light to be converged to form an optical path; the laser compensation pumping source 5 emits laser to enter the coupling system II 6 to adjust the light path, then the coupling system II 6 couples the laser emitted from the laser compensation pumping source 5 to polymerize light to form a light path, then the two beams of pump light are combined into one beam through polarization light combination of the light combiner 4, the light reaches the light feedback component 7, and the light is detected through the light feedback component 7; according to the power of the light, the situation is that 1, the laser pumping source 1 works normally, the laser compensation pumping source 5 does not work, at the moment, if the self-frequency doubling power is reduced, the laser compensation pumping source 5 is started, and the reduction of the self-frequency doubling power is compensated by increasing the power supply parameters of the laser compensation pumping source 5; 2. the laser pumping source 1 works normally, the laser compensation pumping source 5 does not work, and at the moment, if the self-frequency doubling power rises, the power supply parameter of the laser pumping source 1 is reduced to make up for the rise of the self-frequency doubling power; 3. the laser pumping source 1 works normally, the laser compensation pumping source 5 is in a working state, and if the self-frequency doubling power is reduced, the power supply parameter of the laser compensation pumping source 5 is increased to compensate the reduction of the self-frequency doubling power; 4. the laser pumping source 1 works normally, the laser compensation pumping source 5 is in a working state, at the moment, if the self-frequency-doubled power rises, the power supply parameter of the laser compensation pumping source 5 is reduced to compensate the rise of the self-frequency-doubled power until the laser compensation pumping source 5 is shut down, and the output power is adjusted through the laser pumping source 1.
Referring to fig. 1, a PD device is disposed in the optical feedback assembly 7, and after the PD device performs optical feedback on the laser output from the frequency doubling crystal 3, a part of the laser is captured and received by the PD device. The circuit board controls the current input to the pumping source according to the intensity of the PD optical feedback capture signal, thereby controlling the intensity of the laser output by the laser pumping source 1 and the laser compensation pumping source 5. Finally, stable output of laser power is achieved.
Referring to fig. 1, the circuit board in the optical feedback assembly 7 is a DC/DC chip, and the DC/DC chip has the characteristics of high conversion efficiency, small dynamic response, large input voltage range, and the like.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. A wide-temperature constant-power self-frequency-doubling laser is characterized in that: comprises self-frequency doubling crystals (3), one of which can convert the light emitted by the laser diode into laser light with another frequency and green color;
a laser pump source (1), one, emitting laser light capable of being converted by a self-frequency doubling crystal (3);
a laser compensation pump source (5), one, the emitted laser can be converted through a self-frequency doubling crystal (3);
the light combiner (4) is arranged between the laser pumping source (1) and the self-frequency doubling crystal (3) and can combine the light emitted by the laser compensation pumping source (5) and the light emitted by the laser pumping source (1);
the optical feedback assembly (7), one, set up in the one side that the crystal (3) of the auto-doubling of frequency launches the laser, can detect the power of the laser, feed back to the pumping source (1) of the laser and compensating the pumping source (5) of the laser and continue regulating according to the power;
the coupling systems (2) are arranged between the laser pumping source (1) and the self-frequency doubling crystal (3) and can couple light rays emitted by the laser pumping source (1);
and the coupling system II (6) is arranged between the laser compensation pumping source (5) and the self-frequency doubling crystal (3) and can couple the light emitted by the laser compensation pumping source (5).
2. The wide-temperature constant-power self-frequency-doubling laser according to claim 1, characterized in that: the substrate matrix material of the self-frequency doubling crystal (3) can be Gdcob and also can be Ycob.
3. The wide-temperature constant-power self-frequency-doubling laser according to claim 1, characterized in that: the optical feedback component (7) comprises a PD component.
4. The wide-temperature constant-power self-frequency-doubling laser according to claim 1, characterized in that: the coupling system I (2) and the coupling system II (6) are single coupling mirrors or double coupling mirrors.
5. The wide-temperature constant-power self-frequency-doubling laser according to claim 1, characterized in that: the angle between the light path emitted by the light combiner (4) and the laser pumping source (1) is 45 degrees, and the angle between the light path emitted by the laser compensation pumping source (5) and the light combiner (4) is 45 degrees.
6. The wide-temperature constant-power self-frequency-doubling laser according to claim 3, characterized in that: the optical feedback component (7) comprises a DC/DC chip.
7. The wide-temperature constant-power self-frequency-doubling laser according to claim 1, characterized in that: the absorption spectrum width of the self-frequency doubling crystal (3) needs to be at least 25nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220133957.3U CN217692083U (en) | 2022-01-18 | 2022-01-18 | Wide-temperature constant-power self-frequency-doubling laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220133957.3U CN217692083U (en) | 2022-01-18 | 2022-01-18 | Wide-temperature constant-power self-frequency-doubling laser |
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| CN217692083U true CN217692083U (en) | 2022-10-28 |
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| CN202220133957.3U Active CN217692083U (en) | 2022-01-18 | 2022-01-18 | Wide-temperature constant-power self-frequency-doubling laser |
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Effective date of registration: 20231120 Address after: 11th Floor, Huilong Business Center, No. 200 Yanxi Road, Yicheng Street, Yixing City, Wuxi City, Jiangsu Province, 214200 Patentee after: Radivision Advanced Laser Application Technology (Yixing) Co.,Ltd. Address before: 266041 No. 8, Huakang Road, Xiazhuang street, Chengyang District, Qingdao City, Shandong Province Patentee before: QINGDAO LEISHI OPTOELECTRONICS TECHNOLOGY CO.,LTD. |