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We report the first observation of endospores via a new technique, hybrid CARS, which identifies the endospore marker molecules by simultaneous measurement of several vibrational modes. The scheme holds promise for remote/stand-of detection applications.
Ultracold atoms confined in an optical lattice offer an ideal platform for quantum manipulation and precision measurement. We report our latest results using fermionic isotope of Sr.
SAIC??s BAND sensor is an automated system for collecting and analyzing urban air samples to detect airborne biological threats. Microbial threat detection uses highly-multiplexed PCR with microarray fluorescence readout. Toxin detection employs an antibody assay.
A phase-sensitive OTDR provides a cost-effective and highly sensitive solution for monitoring of long perimeters. Signature analysis of the ??-OTDR signal allows the identification of intruders on foot as well as vehicles.
A novel technique that enables coherent detection of spontaneous Brillouin scattering in radio-frequency region has been demonstrated for distributed measurements of temperature and strain in long fiber by using a CW single-frequency Brillouin fiber laser.
We report CW operation of 30W from single chip laser diodes at 808 nm, with an estimated lifetime of over 40,000 hours. They are designed with broad waveguides using InAlGaAs/AlGaAs/GaAs material system grown by MOCVD.
Nd:YAG systems are conventionally pumped at 808-nm. Direct upper-level pumping at 885-nm leads to lower heat. Diode laser pumps sources now provide power with efficiency close to 70% at both wavelengths, offering significant system benefits.
Experiments on different metals and silicon were conducted to optimize removal rate or surface finish with nanosecond pulses of different parameters. A special fiber laser allows independent adjustment of pulse parameters while keeping beamquality constant. Fiber lasers in MOPA configuration enable a tool for micro-machining that allows to independently adjust pulse parameters while keeping the beam...
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