CN211717618U - High-power laser power meter - Google Patents
High-power laser power meter Download PDFInfo
- Publication number
- CN211717618U CN211717618U CN202020193901.8U CN202020193901U CN211717618U CN 211717618 U CN211717618 U CN 211717618U CN 202020193901 U CN202020193901 U CN 202020193901U CN 211717618 U CN211717618 U CN 211717618U
- Authority
- CN
- China
- Prior art keywords
- laser
- power
- power meter
- laser power
- casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The utility model relates to the technical field of laser detection equipment, and discloses a high-power laser power meter, which comprises a casing with a built-in high-power spectroscope, a laser power meter probe, a laser power meter gauge outfit, a control box and a light absorption device, wherein two opposite sides of the casing are respectively provided with a laser input port and a transmission laser outlet, and the other side of the casing is provided with a reflection laser outlet; the laser power meter probe is arranged at the transmission laser outlet, the light absorption device is arranged at the reflection laser outlet, the laser power meter probe is electrically connected with a central processing unit in the control box through a laser power meter head, and the central processing unit is integrated with a proportional arithmetic unit; the surface of the control box is provided with a power display screen which is electrically connected with the central processing unit. The high-power laser power meter can measure high-power laser by using a small-range laser power meter, and is low in cost and simple in maintenance.
Description
Technical Field
The utility model relates to a laser check out test set technical field especially relates to a high power laser power meter.
Background
With the development of laser technology, the application of lasers in the fields of communication medical treatment, industrial manufacturing, civil and military products and the like is gradually widened, the power detection of the lasers is an important technical part in the technical field of laser detection, and the power detection of the lasers corresponds to the continuous output peak power, pulse energy and pulse peak power of the lasers.
Currently, photoelectric type optical power meters and pyroelectric type optical power meters are widely used. The photoelectric type optical power meter realizes power measurement by utilizing the photoelectric effect of a semiconductor, when laser irradiates on a detection photosensitive surface of the photoelectric type optical power meter, a PN junction loop in the photoelectric type optical power meter can form photocurrent, the larger the incident laser power is, the larger the photocurrent is, and the power of the incident laser can be obtained by measuring the photocurrent. The pyroelectric type optical power meter measures laser power by utilizing the pyroelectric effect of a light absorption material, the pyroelectric effect refers to a charge release phenomenon that the polarization intensity changes along with the temperature, the change of the temperature macroscopically causes the voltage or the current to appear at two ends of the light absorption material, and the power of incident laser can be known by measuring the potential difference.
The pyroelectric type optical power meter has the advantages of large power measurable range, wide coverage spectrum range, longer response time and very high cost in the field of high-power measurement. The photoelectric optical power meter has the advantages of quick response time, narrow spectral coverage range and narrow measurable power range, and is generally used in the field of low-power measurement.
At present, lasers with the power of more than 6kW gradually become the mainstream of the market, and laser power meters with the power of more than 6kW only depend on import, the price is high, the maintenance and repair period is long, and the cost is too high. The laser power meter is needed to be used for many times in the process of producing the laser and the after-sale process. The cost of the laser power meter above 6kW is too high in all aspects, so that the manufacturing cost of the high-power laser is high, and the selling price is high.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a high power laser power meter for solve current high power laser power meter and rely on import, with high costs and maintain the problem of maintenance cycle length.
The embodiment of the utility model provides a high power laser power meter, including built-in casing, laser power meter probe, laser power meter gauge outfit, control box and the extinction device that have high power spectroscope, set up laser input port and transmission laser export on two opposite sides of casing respectively, set up reflection laser export on the other side of casing; the high-power spectroscope is used for dividing an incident laser beam into a transmission laser beam and a reflection laser beam;
the laser power meter probe is arranged at the transmission laser outlet to receive the transmission laser beam; the light absorption device is arranged at the reflected laser outlet to absorb the reflected laser beam; the laser power meter probe is electrically connected with a central processing unit in the control box through the laser power meter head, and the central processing unit is integrated with a proportional arithmetic unit; the surface of the control box is provided with a power display screen which is electrically connected with the central processing unit.
The light absorption device comprises a laser absorption cavity and a conical reflection surface arranged in the laser absorption cavity, and the conical reflection surface is used for scattering the reflected laser beam to the inner wall of the laser absorption cavity.
Wherein, the outside of laser absorption chamber is provided with the cooling water course.
Wherein, the cooling water channel is spirally arranged outside the laser absorption cavity in a surrounding manner.
And a black anodic oxide film is arranged on the inner wall surface of the laser absorption cavity.
Wherein, the transmittance of the high-power spectroscope is not more than two per thousand.
Wherein, high power spectroscope slope sets up in the casing, and inclination is 45.
The type of the laser power meter probe comprises a thermopile type, a photodiode type or a pyroelectric type.
The embodiment of the utility model provides a high power laser power meter, including built-in casing, laser power meter probe, laser power meter gauge outfit, control box and the extinction device that has high power spectroscope, divide into transmission laser beam and reflection laser beam with the incident laser beam through the high power spectroscope, after receiving the transmission laser beam through the laser power meter probe, rethread laser power meter gauge outfit turns into the signal of telecommunication of power value, obtain detection power after the central processing unit in the control box carries out the proportion operation, export through the power display screen at last; the light absorbing means is then used to absorb the reflected laser beam. The high-power laser power meter reflects and absorbs most of laser energy of an incident laser beam, transmits a small part of laser energy, measures the power value of the small part of transmitted laser energy by using the small-range laser power meter, and finally calculates the power value of the whole laser beam, so that the small-range laser power meter can be used for measuring high-power laser, the cost of the imported pyroelectric type optical power meter is reduced by more than nine times under the same range, the cost is low, and the maintenance is simple.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high power laser power meter in an embodiment of the present invention;
description of reference numerals:
1. a high power beam splitter; 2. A housing; 3. A laser power meter probe;
4. a laser power meter head; 5. A control box; 6. A light absorbing means;
61. a laser absorption cavity; 62. A conical reflective surface; 63. A cooling water channel;
7. an incident laser beam; 8. Transmitting the laser beam; 9. Reflecting the laser beam;
10. a laser.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly specified or limited otherwise, "upper", "lower", "left", "right", and the like are used only to indicate a relative positional relationship, and when the absolute position of a described object is changed, the relative positional relationship may be changed accordingly. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.
It is to be understood that, unless otherwise expressly specified or limited, the term "coupled" is used broadly, and may, for example, refer to directly coupled devices or indirectly coupled devices through intervening media. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
As shown in fig. 1, the embodiment of the utility model provides a pair of high power laser power meter, including built-in casing 2, laser power meter probe 3, the laser power meter gauge outfit 4, the control box 5 that have high power spectroscope 1 and extinction device 6, seted up laser input port and transmission laser export respectively on two relative sides of casing 2, seted up the reflection laser export on the another side of casing 2. The high power beam splitter 1 is used to split an incident laser beam 7 into a transmitted laser beam 8 and a reflected laser beam 9.
A laser power meter probe 3 is mounted to the transmission laser exit to receive the transmission laser beam 8. A light absorbing means 6 is mounted at the reflected laser light exit to absorb the reflected laser beam 9. The laser power meter probe 3 is electrically connected with a central processing unit in the control box 5 through a laser power meter head 4, and the central processing unit is integrated with a proportional arithmetic unit. The surface of the control box 5 is provided with a power display screen which is electrically connected with the central processing unit.
Specifically, the high power beam splitter 1 has a low transmittance and a high maximum power density threshold, so that most of the laser energy of the incident laser beam can be reflected and a small part of the laser energy can be transmitted. The maximum laser threshold of the high power beam splitter 1 determines the upper limit of the high power laser power meter in this embodiment, and the maximum power that can be measured is 15 kW. Therefore, the maximum measurement ranges of the laser power meter probe 3 and the laser power meter head 4 only need to satisfy the power value corresponding to the maximum power density threshold of the high-power spectroscope 1, and a larger measurement range is not needed, for example, the laser power meter probe 3 and the laser power meter head 4 with the measurement range of 30 watts are used in the embodiment. And then, the small-range laser power meter can be transformed into a large-range laser power meter at low cost, so that the mass production cost is saved, and meanwhile, the existing small-range laser power meter with less use frequency can be transformed and then put into use again, so that the purchase cost is saved.
As shown in fig. 1, the housing 2 may be a cubic housing, and the high-power beam splitter 1 may be obliquely installed in the housing 2, the oblique angle may be selected according to the use requirement, and may be between 40 ° and 50 °, in this embodiment, an angle of 45 ° is taken as an example for description. The laser input port has been seted up to the downside of casing 2, and laser input port department can also be provided with the laser instrument mount pad for the installation detects laser instrument 10 for the light-emitting window of laser instrument 10 can just face the laser input port, jets into the laser in casing 2. The upper side surface of the shell 2 is provided with a transmission laser outlet, the left side surface of the shell 2 is provided with a reflection laser outlet, when an incident laser beam 7 enters the shell 2 from a laser input port, the incident laser beam is divided into two paths of light beams by the high-power spectroscope 1, one transmission laser beam 8 is emitted from the transmission laser outlet, and the emitting direction of the transmission laser beam 8 is parallel to the incident direction of the incident laser beam 7; the other reflected laser beam 9 is emitted from the reflected laser exit, and the emitting direction of the reflected laser beam 9 is perpendicular to the incident direction of the incident laser beam 7.
The transmission laser beam 8 is emitted from the transmission laser outlet, is processed by the laser power meter probe 3 through the laser power meter head 4, is converted into an electric signal of a power value, and is transmitted to the central processing unit in the control box 5. Specifically, the type of the laser power meter probe 3 includes a thermopile type, a photodiode type, or a pyroelectric type. Thermopile probes, whose output voltage is proportional to the input optical power, are manufactured from materials with relatively flat spectral response in the ultra-wide wavelength range, and are suitable for power measurement of broadband light sources (such as LEDs and SLDC). The photodiode type probe is mainly designed for power measurement of a monochromatic light source or a near monochromatic light source, and outputs current according to input optical power and wavelength; the photodiode type probe can also be integrated with a transimpedance amplifier, and the output current is input into the transimpedance amplifier so as to output a voltage proportional to the input current. The pyroelectric energy meter probe generates an output voltage through a pyroelectric effect, is suitable for measuring a pulse light source and has a repetition rate limited by a time constant of the detector; the probe outputs a peak voltage proportional to the input pulse energy. Accordingly, the laser power meter head 4 needs to be matched with the type of the laser power meter probe 3, and the measurement current or voltage is considered as appropriate. The response calibration data of the laser power meter probe 3 are stored in their joint, the laser power meter head 4 will read out the response value according to the wavelength inputted by the user and calculate the power, and then the power value is outputted through the standard analog signal.
After receiving the electric signal of the power value output by the meter head 4 of the laser power meter, the central processing unit in the control box 5 amplifies the measured power value of the small-range meter head 4 of the laser power meter by an internal proportional arithmetic unit in combination with a proportional coefficient prestored in the proportional arithmetic unit, changes the amplified power value into the detection power of the laser 10 with high power, and outputs the detection power through the power display screen. The central processing unit includes an arithmetic unit and a controller, and the basic function of the arithmetic unit is to perform processing on various data, such as arithmetic four arithmetic operations, logical operations such as AND, OR, and negation, comparison of numerical values, and the like. More specifically, a 51-chip microcomputer can be directly adopted, and a micro-control MCU chip is used for completing data analysis and processing.
The proportionality coefficient prestored in the proportionality arithmetic unit can be obtained by calibrating with a standard power meter, the laser 10 can be used for emitting light under one or more power values during calibration, a first power value is recorded by using the standard laser power meter, a second power value is recorded by using the laser power meter header 4 of the high-power laser power meter in the embodiment, and the ratio of the first power value to the second power value is the proportionality coefficient. The whole operation is based on firstly comparing the actual light transmittance of the high-power spectroscope 1 by a standard power meter, and then dividing the reading of the meter head 4 of the laser power meter with a small range by the actual light transmittance to obtain the complete power of the laser 10.
In one specific embodiment, the laser 10 emits light in 5 steps of 20%, 40%, 60%, 80%, 100%, respectively, and the power values W1, W2, W3, W4, W5 are recorded using standard laser power meters; then, the high-power laser power meter in the embodiment is used for recording laser power values P1, P2, P3, P4 and P5 output by the laser power meter head 4 under the light of 5 grades; dividing the corresponding first power value by the second power value to obtain proportional coefficients Z1, Z2, Z3, Z4 and Z5, and inputting Z1-Z5 into a proportional arithmetic unit; the high-power laser power meter in the embodiment is used again to record the power values pW1, pW2, pW3, pW4 and pW5 displayed by the control box 5 under the light of 5 shifts respectively; and comparing the pW1-5 with the W1-5, wherein the error is not more than +/-2 percent, and the completion of calibration can be determined. For example, when the high power laser power meter in the present embodiment is used for laser measurement of 5kW, detection power of 1kW or less is obtained using the proportionality coefficient Z1, and detection power between 1kW and 2kW is obtained using the proportionality coefficient Z2, and detection power between … … 4kW and 5kW is obtained using the proportionality coefficient Z5. After calibration, the calibration is only required to be within the range of measurement range, and recalibration is not required. Theoretically, the power of the laser 10 and the output power of the small-range laser power meter head 4 belong to a linear relation, and single-gear calibration is adopted. In practical use, some deviation is found, and the accuracy of the result can be improved by adopting 5-gear parameters for calculation respectively.
The high-power laser power meter provided by the embodiment comprises a shell internally provided with a high-power spectroscope, a laser power meter probe, a laser power meter gauge outfit, a control box and a light absorption device, wherein an incident laser beam is divided into a transmission laser beam and a reflection laser beam through the high-power spectroscope, the transmission laser beam is received by the laser power meter probe and then converted into an electric signal of a power value through the laser power meter gauge outfit, a central processing unit in the control box performs proportional operation to obtain detection power, and finally the detection power is output through a power display screen; the light absorbing means is then used to absorb the reflected laser beam. The high-power laser power meter reflects and absorbs most of laser energy of an incident laser beam, transmits a small part of laser energy, measures the power value of the small part of transmitted laser energy by using the small-range laser power meter, and finally calculates the power value of the whole laser beam, so that the small-range laser power meter can be used for measuring high-power laser, the cost of the imported pyroelectric type optical power meter is reduced by more than nine times under the same range, the cost is low, and the maintenance is simple.
Further, as shown in fig. 1, the light absorbing device 6 includes a laser absorption cavity 61 and a conical reflecting surface 62 disposed in the laser absorption cavity 61, and the conical reflecting surface 62 is used for scattering the reflected laser beam 9 to the inner wall of the laser absorption cavity 61. Specifically, the conical reflecting surface 62 is made of aluminum alloy and is processed into a cone shape, and meanwhile, the surface of the cone keeps the natural color, and the roughness can be 0.8, so that the reflected laser beam 9 can be favorably and uniformly scattered onto the inner wall of the laser absorption cavity 61 to be absorbed and converted into heat.
Further, the inner wall surface of the laser absorption cavity 61 is provided with a black anodized film. The laser absorption cavity 61 can be made of aluminum alloy into a cylindrical shape, and the inner surface of the laser absorption cavity is subjected to black anodic oxidation, so that laser absorption is facilitated.
Further, the outside of the laser absorption cavity 61 is provided with a cooling water passage 63. Cooling water or other cooling liquid, such as heat conducting oil, may flow through the cooling water channel 63 to accelerate heat dissipation of the laser absorption cavity 61. The cooling water channel 63 may be spirally disposed around the laser absorption cavity 61, so as to further improve the heat dissipation effect.
Further, the transmittance of the high-power spectroscope 1 is not more than two thousandths. The high power beam splitter 1 in this embodiment has three relevant parameters: wavelength, maximum power density threshold and transmittance are used. The wavelength used is dependent on the laser 10 used to test which wavelength; the maximum power density threshold and transmittance are tailored based on the range of the selected small-range power meter and the final target range. In one embodiment, the high power beam splitter 1 has a wavelength of 900nm to 1200nm, a transmittance of four parts per million, and a maximum power density threshold of 500MW/cm2。
Can see through above embodiment, the utility model provides a high power laser power meter, including built-in casing that has the high power spectroscope, laser power meter probe, laser power meter gauge outfit, control box and extinction device, divide into transmission laser beam and reflection laser beam with the incident laser beam through the high power spectroscope, after receiving the transmission laser beam through laser power meter probe, rethread laser power meter gauge outfit turns into the signal of telecommunication of power value, obtain detection power after the central processing unit in the control box carries out the proportion operation, export through the power display screen at last; the light absorbing means is then used to absorb the reflected laser beam. The high-power laser power meter reflects and absorbs most of laser energy of an incident laser beam, transmits a small part of laser energy, measures the power value of the small part of transmitted laser energy by using the small-range laser power meter, and finally calculates the power value of the whole laser beam, so that the small-range laser power meter can be used for measuring high-power laser, the cost of the imported pyroelectric type optical power meter is reduced by more than nine times under the same range, the cost is low, and the maintenance is simple.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. A high-power laser power meter is characterized by comprising a casing, a laser power meter probe, a laser power meter head, a control box and a light absorption device, wherein the casing is internally provided with a high-power spectroscope, two opposite side surfaces of the casing are respectively provided with a laser input port and a transmission laser outlet, and the other side surface of the casing is provided with a reflection laser outlet; the high-power spectroscope is used for dividing an incident laser beam into a transmission laser beam and a reflection laser beam;
the laser power meter probe is arranged at the transmission laser outlet to receive the transmission laser beam; the light absorption device is arranged at the reflected laser outlet to absorb the reflected laser beam; the laser power meter probe is electrically connected with a central processing unit in the control box through the laser power meter head, and the central processing unit is integrated with a proportional arithmetic unit; the surface of the control box is provided with a power display screen which is electrically connected with the central processing unit.
2. The high power laser power meter according to claim 1, wherein the light absorbing means comprises a laser absorption cavity and a conical reflecting surface disposed in the laser absorption cavity, the conical reflecting surface being configured to scatter the reflected laser beam to an inner wall of the laser absorption cavity.
3. The high power laser power meter according to claim 2, wherein a cooling water passage is provided outside the laser absorption cavity.
4. The high power laser power meter according to claim 3, wherein the cooling water channel is spirally disposed around the outside of the laser absorption cavity.
5. The high power laser power meter according to claim 2, wherein the inner wall surface of the laser absorption cavity is provided with a black anodic oxide film.
6. The high power laser power meter according to claim 1, wherein the transmittance of the high power spectroscope is not more than two thousandths.
7. The high power laser power meter according to claim 1, wherein the high power beam splitter is disposed in the housing at an angle of 45 °.
8. The high power laser power meter according to any of claims 1-7, wherein the laser power meter probe is of the type comprising a thermopile type, a photodiode type, or a pyroelectric type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020193901.8U CN211717618U (en) | 2020-02-21 | 2020-02-21 | High-power laser power meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020193901.8U CN211717618U (en) | 2020-02-21 | 2020-02-21 | High-power laser power meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211717618U true CN211717618U (en) | 2020-10-20 |
Family
ID=72825977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020193901.8U Active CN211717618U (en) | 2020-02-21 | 2020-02-21 | High-power laser power meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211717618U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114543988A (en) * | 2022-02-23 | 2022-05-27 | 武汉锐科光纤激光技术股份有限公司 | Laser power meter |
-
2020
- 2020-02-21 CN CN202020193901.8U patent/CN211717618U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114543988A (en) * | 2022-02-23 | 2022-05-27 | 武汉锐科光纤激光技术股份有限公司 | Laser power meter |
| CN114543988B (en) * | 2022-02-23 | 2023-11-21 | 武汉锐科光纤激光技术股份有限公司 | Laser power meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6075372B2 (en) | Material property measuring device | |
| CN104335018B (en) | Laser power sensor | |
| CN103364370B (en) | Annular core optical fiber sensor based on annular chamber decline | |
| CN111579062A (en) | Integrating sphere type laser power meter and using method thereof | |
| CN105387933A (en) | Broadband Brewster window adjusting device and method | |
| CN108593587A (en) | A kind of non-dispersion infrared gas sensor | |
| CN211717618U (en) | High-power laser power meter | |
| CN205015147U (en) | A integrated test system for semiconductor laser chamber face failure analysis | |
| CN105510005B (en) | A kind of optical element Transflective rate measuring instrument | |
| CN213397588U (en) | Laser divergence angle testing system | |
| CN105157830A (en) | Laser power meter based on infrared radiation measurement | |
| Voronina et al. | Probing hydrogen molecules with a laboratory raman lidar | |
| CN204788657U (en) | Laser power meter based on infrared measures | |
| Liyun et al. | Optical fiber sensor determination of the water salinity based on surface plasmon resonance | |
| CN114279562B (en) | Calibration method for blackbody cavity absorption coefficient under variable temperature condition | |
| CN202083626U (en) | Laser gas analyzer for self-focusing lens collimation | |
| CN208953128U (en) | Myriawatt power meter | |
| CN109297591A (en) | Myriawatt power meter | |
| CN105424320A (en) | Device for high-precision testing of output power stability of wide-spectrum light source | |
| US5796481A (en) | Suspended particle concentration monitor | |
| CN109406109A (en) | High-power fiber grating scattering loss measuring system based on integrating sphere | |
| CN109342317A (en) | A kind of optical parameter test device and method for plane black-materials | |
| Golnabi | Using three different optical fiber designs to study humidity effect on the air refractive index | |
| CN217738981U (en) | Device for measuring thermo-optic coefficient of material | |
| CN220932785U (en) | Sulfuryl fluoride concentration sensor and sulfuryl fluoride concentration detection device with same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |