Spot Size Reduction


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Designed as a telecom/datacom component, Chiral Photonics’ spot size converting interconnect is used in slice electrophysiology experiments for localized stimulation of terminals expressing channelrhodopsin-2.

A small spot size at the tapered end of the interconnect permits selective stimulation of anatomically defined areas. Fully abutted, the spot size is on the order of 1 x 2 microns, and remains 5-10 times smaller than the spot size out of an ordinary fiber at any distance of under 2 millimeters. The device, in addition, may also be useful for stimulation of larger areas. As spot size is inversely correlated with numerical aperture, beam divergence is approximately 10 times that of ordinary fiber.


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For further information, or, to order, contact Saul Felman,