Big Berthas used to measure laser power | Wright-Patterson AFB News

The laser is shot through a "chopper wheel" and then into the calorimeter. Through this process AFMETCAL is able to accurately calibrate these calorimeters and determine the energy levels these items can support. (courtesy photo)

WRIGHT-PATTERSON AFB, Ohio (AFLCMC) – The Air Force Metrology and Calibration Division is using some unique mobile “Big Bertha” series High Energy Laser primary reference calorimeters to support Air Force Research Laboratory’s national defense programs work on lasers. 

The HEL calibration supports the Laser Hardened Materials Evaluation Laboratory (LHMEL) of the Air Force Research Laboratory’s Materials and Manufacturing Directorate at Wright Patterson AFB and the AFRL Directed Energy Directorate at Kirtland AFB in Albuquerque, NM.  For over 35 years, AFRL’s LHMEL has provided the aerospace community with a comprehensive source for high temperature characterization of current and emerging materials using a variety of infrared laser sources and environmental simulation capabilities.

The calibrations performed by AFMETCAL enable LHMEL to accurately simulate high service life temperatures experienced by parts within a jet engine.

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