https://buddyblogger.com/lasers-open-new-prospects-for-optical-thermometry/

A new and exciting kind of optical thermometry has emerged recently - namely, nonlinear optical thermometry. The very first instance of this type of thermometry employs rare nonlinear optical properties (three-photon absorption in the near-infrared rage) of the lanthanide coordination polymer within the near-infrared spectrum. Indeed, this brand-new technique, known as nonlinear optic temperature sensing, substances that are typically excited by ultraviolet light may be excited by near-infrared lasers.

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https://buddyblogger.com/lasers-open-new-prospects-for-optical-thermometry/