Q: What are the measurement principles of a laser power meter?
A: There are three mainstream principles: ① The principle of thermal effect-laser irradiation on the surface of the probe into heat, measuring the temperature change, which is suitable for low, medium and high power;② The principle of photoelectric effect-the photodiode generates photogenerated carriers to form a current, which is extremely sensitive. High, suitable for low power;③ The principle of radiation pressure-measures the tiny pressure generated by the laser on the probe, mainly used for high power in a short period of time. Currently, it is not a mainstream technology.
Q: How to choose a thermoelectric power meter and a photodiode power meter?
A: Selective heating: industrial cutting/welding (kW level), high power density measurement, continuous laser power monitoring, wide spectral response (0.19-20μm). Select photodiodes: laboratory low power measurement, pulsed laser measurement, high-speed modulated signal measurement, optical communication power testing.
Q: Can I measure all scenarios with one power meter?
A: No. Thermoelectricity cannot measure low power, and photodiodes cannot measure high power. Laser Optoelectronics Solutions: One-stop coverage of the full power range of 10nW-150kW, there is always one for you!
Q: The response of thermoelectric power meter is slow. Can it measure pulsed laser light?
A: When the repetition rate of the pulsed laser is high enough (usually>10Hz) and the pulse train is stable, the thermoelectric energy integrates all pulse energy and outputs an average power value. However, for pulsed lasers with low repetition rates, it is recommended to use an energy meter to measure the energy of a single pulse.
Q: What are the technical highlights of Laser Optoelectronics 'thermoelectric power meter?
A: Using a temperature measurement principle different from traditional thermocouples, the power linearity is higher; the new laser absorption coating has high thermal conductivity, high temperature resistance, and high absorption rate; innovative product design has better spatial uniformity, and the probe is not easy to be damaged.
