Systems and methods to control cross-talk of an optical fiber-based sensing module

A touch screen device, comprising:

• optical transceiver circuitry;
• a cover material;
• and
• one or more cylindrical optical fibers, wherein a first cylindrical optical fiber includes a first core, a first absorptive clad circumferentially surrounding the first core, and a first absorptive jacket circumferentially surrounding the first absorptive clad, and wherein the cover material is separated from a top portion of the first cylindrical optical fiber by a threshold distance of less than 200 micrometers.

A proximity sensing module, comprising:

• a first optical fiber including a first core, wherein the first core is circumferentially surrounded by a first absorptive jacket;
• and
• a second optical fiber including a second core, wherein the second core is circumferentially surrounded by a second absorptive jacket;
• wherein the first optical fiber is disposed between a cover material and optical transmitter circuitry or optical receiver circuitry and the second optical fiber is disposed between the cover material and the optical transmitter circuitry or the optical receiver circuitry, and wherein the cover material is separated from a top portion of the first optical fiber, or the cover material is separated from a top portion of the second optical fiber, by a threshold distance of less than 200 micrometers.