Low Power MEMS Retroreflectors for Optical Communications

Optical communication is emerging rapidly as a critical need for military operations. Through pioneering work in optical micro-electrical mechanical systems (MEMS) devices, the project team has created new technologies that can expand the capabilities of existing Warfighter equipment including NIR laser aiming/illumination with I2 night vision, laser rangefinding, laser target designation, and short wave infrared (SWIR) imaging to provide vastly improved situational awareness, including broad area surveillance, and point-to-point communications. This new technology has been demonstrated in the Phase I effort using prototype versions of the modulated retro-reflector (MRR). This device is based on a MEMS modulator coupled with either an infrared pulsed laser or a CW laser that are part of existing range finding system and aiming systems. The proposed system will enable secure and robust voice and data transmission over an optical link. With MEMS-enabled transponders interrogated by existing weapon laser hardware, the Warfighter gains secure communication, rapid identification of friendly forces, and the potential to substantially improve situational awareness. A central outcome of the proposed work will be optical communication technology using compact, low power, and low cost MEMS devices and associated electronics that can increase the effectiveness of the Warfighter, particularly when engaged in asymmetric warfare.