Low Cost Spectrally Agile Self-Responsive Laser Protection Device

In this SBIR Phase I proposal, we propose a low-cost spectrally agile self-responsive passive laser protection device (P-LPD) that is space qualified.  The P-LPD is made of an optically reactive phase-changing Vanadium Dioxide (VO2) film imbedded in a structured thin, flexible, and monolithic plastic sheet.  It aims to enhance resilience of satellites to directed energy of powerful lasers. It can greatly protect satellite and aircraft electro-optical and infrared (EO-IR) sensors from being destroyed by lasers.  Under a normal condition with no laser threats, the P-LPD is highly transparent with >70% optical transmittance to allow a normal detection and tracking operation of EO-IR sensors.  Once a powerful laser with unknown wavelength presents from an emitter such as a laser guided weapon, the P-LPD locally rejects the incoming laser beam over a broad spectral bandwidth.  The rejected laser energy is deflected to exit from the P-LPD edge into the direction that can’t be detected or tracked by the enemy EO-IR sensor.  Additionally, the P-LPD can be made into a tile-like format which can be applied as a coating to the satellite and aircraft to make them stealthy.  Since the P-LPD coating does not retro-reflect laser light, it provides a stealthier capability against those laser-guided weapons and/or sensors.   In Phase I, a feasibility study will be performed to evaluate the P-LPD designs emphasizing on low cost and space qualification with an in-depth analysis and lab experiment to down-select for Phase II development (reaching TRL 3).  Phase II is to develop space qualified P-LPD prototypes via VO2 material synthesis, plastic WG fabrication, and P-LPD integration as well as lab qualification to reach TRL 6.