Fiber laser has the advantages of good beam quality, high energy density, high electro-optical conversion efficiency, good heat dissipation, compact structure, maintenance-free, flexible transmission, etc., which has become the mainstream direction of the development of laser technology and the main force of application. The overall electro-optical efficiency of fiber laser is 30%~35%, and most of the energy is dissipated in the form of heat.
Therefore, the temperature control during the laser working process directly determines the quality and service life of the laser. Traditional contact temperature measurement methods can damage the structure of the laser body, while single-point non-contact temperature measurement methods cannot accurately capture the fiber temperature. The use of infrared thermography to detect the temperature of the fiber during the production of fiber lasers, especially at the fiber fusion splicing, can strongly ensure the development and quality control of fiber optic products. Temperature measurement of pump sources, combiners, pigtails, etc. during production testing to ensure product quality.
At the application end of the infrared thermal imaging temperature measurement can also be in the laser welding, laser cladding and other scenarios for temperature measurement.
Infrared thermal imaging camera used in fiber laser detection of the unique advantages:
- Infrared thermal imaging camera temperature measurement has a long distance, non-contact, large area temperature measurement characteristics.
- Professional temperature measurement software, free to choose the monitoring temperature region, automatically obtain and record the highest temperature point, to enhance the efficiency of the test.
- Can set the temperature threshold, fixed-point sampling, multiple temperature measurement, automatic data acquisition and curve generation.
- Support various forms of over-temperature alarm, automatically determine the abnormality according to the set value, and automatically generate data reports.
- Support secondary development and technical services, provide multi-platform SDK, easy to integrate and develop automation equipment.
Infrared applications
Fiber optic fusion splicing point quality monitoring
In the manufacturing process of high-power fiber lasers, optical discontinuities and defects of a certain size may exist at the fiber fusion joints, and serious defects will lead to abnormal heating at the fiber fusion joints, which will cause damage to the laser or burn out hot spots. Therefore, temperature monitoring of fiber fusion joints is an important part of the fiber laser manufacturing process. The use of infrared cameras can achieve the temperature monitoring of fiber fusion joints, so as to determine whether the quality of the measured fiber fusion joints is qualified, and improve product quality.
The use of on-line infrared cameras integrated into automated equipment enables stable and fast testing of the fiber temperature and improves production efficiency.
LD pumping source
A single LD chip output laser power is limited. Pumping will be more than one LD chip packaged together to increase the output power. Pumping generates a lot of heat, so the temperature directly affects the wavelength of the laser output from the chip. The use of infrared thermal imaging camera for each pump incoming quality inspection, unqualified pumps returned to ensure the quality of the laser.
Combiner temperature detection
The role of the beam combiner is to combine the N pump laser into one laser, to achieve high power laser output. The use of infrared thermography for working temperature test, can be on the beam splitter work properly to determine whether to improve product quality.
Laser welding Machine
Due to the high temperature of laser welding, the infrared camera used must be able to measure very high temperatures, but also requires a wide temperature range. Our infrared thermal imaging instrument temperature measurement range -20 ~ 1600 ℃, can meet the welding process temperature range.
Since the heating process and the whole welding process is relatively fast, it is important to use a high-speed infrared camera with a high frame rate. Use an in-line infrared camera with a frame rate of 50Hz/100Hz, which can quickly capture temperature changes. Because of the special environment of laser welding, must meet the people away from the welding site, the use of infrared thermal imaging camera can be realized online real-time background operations.
Infrared thermal imaging is the detection of long-wave infrared (8-14μm wavelength) for imaging and temperature measurement, without the influence of the laser light source.
- Laser cladding melt pool temperature measurement
Laser cladding melt pool temperature changes quickly, the melt pool area is small, the use of thermal imaging temperature measurement can accurately capture the temperature changes and the distribution of the melt pool temperature field. Infrared thermography can be used to test melt pool temperatures of up to 2000°C.
On-line infrared thermal imaging thermometer - Functional features
Ultra-high response range
Adopting segmented temperature measurement parameter adjustment, the temperature measurement range is optional, covering -20 ℃ ~ 1600 ℃, within the range of normal temperature measurement, temperature measurement accuracy of up to ± 2%, beyond the range can also be normal imaging.
- Adopt high frame rate design
Can observe fast-moving targets, conventional products frame rate 25Hz/50Hz, special application scenarios and 100Hz high-speed infrared imaging temperature measurement products.
- Adopt high transmittance non-thermalized lens
The front piece is coated with carbon film, which can play a certain role in protection without adding germanium window, and there is also a high transmittance germanium window protection cover available for optional use to adapt to a variety of harsh places of use.
- Gigabit network design network cable transmission
Both to ensure the long-distance transmission and ensure the reliability of transmission, but also allows people to stay away from the scene environment.
- Output full code stream lossless 16Bit temperature data.
Provide client software and SDK development kit, easy for customers to carry out secondary development and system integration, fully personalized temperature analysis of the measured target.
