Q: What is a laser power meter?
A: Laser power meter is a measuring instrument that converts laser energy into quantifiable electrical signals through the principle of photoelectric conversion or thermoelectric conversion. Simply put, it is a special instrument used to measure "how strong" the laser is. The laser power meter covers the full power range of 10nW to 150kW and is widely used in industry, scientific research, medical and other fields.
Q: What is the difference between laser power and laser energy?
A: The unit of power is watts (W), which measures "the energy output by the laser per unit of time"; the unit of energy is joule (J), which measures "the total energy contained in a single laser pulse." Analogy: Power is like the speed of water flow, and energy is like the power of a hammer to hit a nail. Core formula: P = E × f.
Q: When is the power measured? When is the energy measured?
A: Power measurement: The laser is "always bright"(continuous laser) or the flashing frequency is very high (above kHz). Typical scenarios: industrial cutting and welding, optical fiber communication.
Energy measurement: The laser "flashes"(pulsed laser), and the frequency is very low (Hz level). Typical scenarios: laser marking, pulse cleaning, laser medical treatment.
Q: What is the difference between peak power and average power?
A: Peak power = single pulse energy ÷ pulse width, reflecting the instantaneous power of a single laser impact; average power = single pulse energy × repetition frequency, reflecting the intensity of continuous laser action. Confusing the two may cause burning of the equipment by selecting the wrong probe.
Q: Why is laser power measurement important?
A: Laser power is one of the most important parameters of a laser: processing quality (insufficient power cannot be cut through); production efficiency (excessive power is wasted); equipment safety (risk of losing control of power). Regular monitoring is the basic means.
