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Physics
Classical Physics
Thermodynamics
Calculating Laser Power from Temperature Rise, Time, and Target Mass?
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[QUOTE="DrClaude, post: 6063210, member: 461323"] The base equation is simply the equation for heat capacity: $$ C = \frac{Q}{\Delta T} $$ Knowing ##C## for the block and measuring ##\Delta T##, you can then get the power by ##Q/\Delta t##. [B]But... [/B] As you said, this is far what will happen in real life. The actual amount of heat ##Q## transferred will depend, among others, on the absorptivity of the block at the wavelength of the laser. It is also quite possibly non-linear for high-power cases. You also have to account for heat loss while waiting for the thermometer to stabilise. My guess is that the only way to do it with any reasonable accuracy is by calibration, sending pulses from lasers with known power and measuring the corresponding change in temperature. [/QUOTE]
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Physics
Classical Physics
Thermodynamics
Calculating Laser Power from Temperature Rise, Time, and Target Mass?
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