The objective of this research was to demonstrate the extension of the current design of the Individual Identification Friend or Foe (IIFF) patch, to provide a response in the shortwave infrared (SWIR) region of the electromagnetic spectrum. The purpose of the IIFF patch is to mitigate fratricide during ground engagements, by emitting a near infrared (NIR) signal, when the wearer is illuminated by a targeting laser attached to the shooter's ...