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Target Reflected Energy Measurement


 

The Technology

The US Military is currently leading a series of efforts to improve the ability to test and evaluate Directed Energy Weapons (DEWs) under the DETEC (Directed Energy Test and Evaluation Capability) Program. Under contract with SAIC (the Lead System Integrator for DETEC), SARA has developed the Target Reflected Energy Measurement system (HEL TREM) - a system capable of measuring and characterizing weapons-grade High Energy Lasers (HEL) designed to measure reflected energy from a stationary ground target’s surface during an HEL engagement with energy levels sufficient for lethality demonstrations. Continuous Wave (CW) or pulsed HEL beams in the 1-1.6 micron (NIR) range, and from a fixed or moving HEL are characterized without interfering with the lethality function of the laser – to disable or destroy a target – and without damaging the HEL TREM system.

TREM head  TREM on Tripod
The HEL-TREM sensor head mounted on a transportable tripod

The Applications

SARA’s TREM instrument is a versatile diagnostic for determining the amount [absolute intensity and energy density] and distribution [angular pattern] of reflected and scattered laser light. This data is important for assessing test site safety. TREM data also provides experimental data to assist development of computer codes to predict reflected laser radiation hazards in various laser weapon engagement scenarios. Sensor data is collected during the entire HEL engagement and post-processed to determine intensity and distribution of the scattered laser energy.
Designed primarily for use during lethality tests using outdoor targets, it is capable of measuring high energy lasers platforms that are:

  • Static
  • Ground vehicle based
  • Airborne

 

TREM on Tripod
The complete TREM system consisting in a network of thirty independent sensor heads.

The Advantages

SARA’s HEL TREM system is on the leading edge of technology, and is the only system available that can characterize weapons-grade lasers without interfering with lethality demonstrations. Some key features of this system are:

  • Self contained (only requires 220V power)
  • Minimum interference with actual targets
  • HEL source may be pulsed, continuous, static, moving, land-based or airborne Data system capacity and operation supports 7 laser firings in 2 hours
  • Field deployable / transportable / user-friendly
  • Data is IRIG-B time stamped for synchronization to other data
  • Suitable for daytime or nighttime use

Similar systems can be designed and built to support

  • Indoor tests
  • Wavelengths outside the 1-1.6 micron (NIR) range