SATPC0033037 Tab 04 4 SOW.pdf

STATEMNT OF WORK

A pulsed, monochromatic, low-coherence laser diode illumination source is required for time-resolved schlieren imaging experiments in NASA Langley Research Center’s National Transonic Facility (NTF). The illumination source must have the ability to produce 50 ns illumination pulses at a rate of 60 kHz at a wavelength of 640 nm with low-coherence that provides near-uniform illumination over the entire field-of-view and minimizes laser speckle on the image sensor. The total possible output power of the illumination source must be 400 W. The illumination source must also have a low-power, eye-safe green alignment laser that allows for precise alignment of the illumination source. The source must be compatible with an existing Cavitar Cavilux Control unit for control of output and be capable of being synchronized to an external 5 V TTL trigger source that allows for the pulsed illumination output to coincide with the exposure of a high-speed camera for flow visualization. The illumination source must include a laser source unit, power supply, standard optical fiber light guide, and custom 50-cm-long liquid light guide for use inthe confined space of an environmental enclosure used at NTF. Physical dimensions of the laser head source must not exceed 160 mm long by 70 mm wide by 40 mm high in order to fit within the environmental enclosure while allowing room for other optical diagnostic hardware. The illumination source must also be compatible with the existing open/close laser interlock system in the NTF wind tunnel for safe operation.