I am working with Francois on the new Joint-type transducer, making prototypes for the following design:
Convex type https://docs.google.com/drawings/d/1KyzF-MpkvOXdisDqgH_yGBO9UF6DN-m7aoV9a-eRmFg/edit

The goal is to make a few transducers that will be used at Phil's lab for the Mosquito Scientific Instrument System.

The other day I observed how the curvature of the tip of the delivery fiber was affecting the exit angle of the light. It turns out that the angle starts to diminish when the fiber tip it melted a lot to make a large ball. The ball for smaller exit cone is larger than the diameter of the shrinking tube. The conclusion was that we need to have a small curvature, to avoid fabry perot, but the sensitivity will not improve a lot, because we cannot reduce the exit cone of the light. These tests were done with visible green light.

Today we'll connectorize the convex delivery fiber to a mirrored lever that was made the other day by Francois, and explore the performance of this transducer.

We are now testing different convex delivery joint-type for intensity variation with gap size. We see some strange behavior, an increase in intensity within 50 microns, with a pick in the middle, and after the intensity diminishes normally for the geometrical mode.

I am working with Francois on the new Joint-type transducer, making prototypes for the following design:
Convex type https://docs.google.com/drawings/d/1KyzF-MpkvOXdisDqgH_yGBO9UF6DN-m7aoV9a-eRmFg/edit

The goal is to make a few transducers that will be used at Phil's lab for the Mosquito Scientific Instrument System.

The other day I observed how the curvature of the tip of the delivery fiber was affecting the exit angle of the light. It turns out that the angle starts to diminish when the fiber tip it melted a lot to make a large ball. The ball for smaller exit cone is larger than the diameter of the shrinking tube. The conclusion was that we need to have a small curvature, to avoid fabry perot, but the sensitivity will not improve a lot, because we cannot reduce the exit cone of the light. These tests were done with visible green light.

Today we'll connectorize the convex delivery fiber to a mirrored lever that was made the other day by Francois, and explore the performance of this transducer.

We are now testing different convex delivery joint-type for intensity variation with gap size. We see some strange behavior, an increase in intensity within 50 microns, with a pick in the middle, and after the intensity diminishes normally for the geometrical mode.