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Caution: Lasers Can Seriously Damage Instruments

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Caution: Lasers Can Seriously Damage Instruments

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The maximum average power density depends, among other things, on the average power level. At high powers, the detector surface around the spot is relatively hot, making heat propagation away from the spot more difficult and increasing the risk of damage. At lower powers, heat can move away from the spot more easily, allowing the surface material to withstand higher power density. We always specify maximum average power density at the highest average power for which a given sensor is rated, so that the spec sheet is as useful as possible to the user. This is why a high-power sensor using a certain absorber type, for example, will have a lower maximum average power density specified than a lower-power sensor with the same absorber.

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