The reliability and lifetime of laser diodes is critical to space missions. The Nuclear Spectroscopic Telescope Array (NuSTAR) mission includes a metrology system that is based upon laser diodes. An operational test facility has been developed to qualify and select, by...

Optical sources operating in the atmospheric window of 3–5 μm are of particular interest for the development of free-space optical communication link. It is more advantageous to operate the free-space optical communication link in 3–5-μm atmospheric transmission window than at the telecom...

The proposed device is capable of counting ultraviolet (UV) photons, is compatible for inclusion into space instruments, and has applications as deep-UV detectors for calibration systems, curing systems, and crack detection. The device is based on a Separate Absorption and Charge...

A superstructured fiber-grating-based mode selection filter for a single-frequency fiber laser eliminates all free-space components, and makes the laser truly all-fiber. A ring cavity provides for stable operations in both frequency and power. There is no alignment or realignment required. After the...

A company seeks a probe-type ammonium sensor that can stand up to high temperatures and pressure during the sterilization step for fermentation, and that can deliver real-time concentration information during fermentation. The fermentation processes used require up to 60 hours to be...

A company seeks components to make up one or more systems that can remove surface contamination (biofilms), lime scum, and lime scale buildup; ameliorate water hardness, mold, mildew, and similar spores; and handle soap scum and remove surface detritus from a variety of materials. These components would...

By suppressing or controlling harmonic currents and voltages of the motor to overcome torque ripple, this system improves the efficiency and torque performance of an AC motor, especially permanent magnet synchronous motors (PMSM). Many PMSMs use a concentrated winding, and...

A new flat solar collector features a heat-absorbing surface that equals the heat-transferring surface, resulting in high-heat performance and efficiency. There is no mediatory unit between the heat-transferring surface of the absorber and the heating agent. This means no galvanic corrosion, which would work...

NASA is expanding the use of Unmanned Aerial Vehicles (UAVs) fabricated from composite materials as aerial platforms to carry scientific payloads for science and environmental missions. The UAV brings an unprecedented capability for extended flight duration (over 24 hours on station) to provide...

With the advance of polymer and other non-metallic material sciences, whole new series of polymeric materials and composites are being created. These materials are being optimized for many different applications including cryogenic and low-temperature industrial...

A low-cost, portable, and simplified system has been developed that is suitable for in-situ calibration and/or evaluation of multi-axis inertial measurement instruments (e.g., accelerometers). This system overcomes facility restrictions and maintains or improves the calibration quality for users of...

A technique was created to measure the pupil alignment of instruments in situ by measuring calibrated pupil alignment references (PARs) in instruments. The PAR can also be measured using an alignment telescope or an imaging system. PAR allows the...

A low-cost and reliable system assesses the integrity of composite fan-containment structures. The system utilizes a network of miniature sensors integrated with the structure to scan the entire structural area for any impact events and resulting structural damage, and to...