A heat-sinking self-referencing fiber optic emission probe

A novel heat-sinking, self-referencingfiber optic emission probe having asapphire fiber probe head is described. Thelaser heating effect in a GaAs wafer (on a polytetrafluoroethylene (PTFE) platform) has beenmeasured with the probe in both the noncontact proximity mode and the contact mode. The GaAs/PTFE composite was selected to simulate thethermal conductivity of animal tissues. It was found that for the same laser power delivered to the wafer, the temperature rise in the contact mode was only 42% of that in the proximity mode. Additionally, a demonstration of the self-referencing capability of the probe is also presented.

Source: Review of Scientific Instruments - September 23, 2016 Category: Physics Authors: Nicholas Djeu and Yutaka Shimoji Source Type: research