|Points of Contact:||Oleksandr Kokhan|
Lasers are an essential part of our modern society. They are components of home electronics, manufacturing equipment, surgical procedures, atmospheric monitoring devices, and also are a key piece of technology for chemical research. Lasers have transformed modern chemistry. Currently, chemists are able to use lasers to initiate, control, and watch chemical reactions on a scale that was unimaginable 50 years ago. James Madison University has a large laser spectroscopy laboratory that distinguishes it from other primarily undergraduate institutions. Researchers are able to utilize the Facility’s holdings to perform an abundance of interdisciplinary scientific research.
The JMU Regional Undergraduate Laser Facility has grown through many years of support from multiple funding agencies (National Science Foundation, National Institute of Standards and Technology, the James Madison University Department of Chemistry and Biochemistry, and a Research Corporation Department Development Award). Holdings include multiple Nd/YAG, nitrogen, helium/neon, argon ion, and diode lasers. The facility is also equipped with an array of diagnostic tools for laser spectroscopy including a wide range of digital oscilloscopes, monochromators, diode array detectors, signal and delay generators.
In Summer 2014, we acquired a high power frequency-tripled Nd/YAG laser with Optical Parametric Oscillator which can be tuned in the range from 410 to 2200 nm. Other acquisitions include a suprcontinuum laser (Leukos – SCM-8, <1 ns pulse width, 8kHz, 350-2200 nm spectral bandwidth), CCS200 gated spectrometer from Thor Labs (200-1000 nm) and a low noise digitizer (PicoScope 5244B, 12-bit resolution at 500MS/s, 512 MS memory). These instruments are a part of our new broadband pump-probe spectrophotometer for nanosecond transient absorbance and emission experiments. Other recent acquisitions include a UP213 laser ablation system, a variety of tunable single-mode diode lasers including a 775 nm New Focus Velocity laser and five NTT:NEL distributed feedback diode lasers for gas sensing of O2, H2O, CO2, and CH4. Additional diagnostic tools acquired in 2010-2011 include a Bristol Instruments NIR ±60 MHz wavemeter, a Stanford Research Systems 100 kHz spectrum analyzer, and a temperature-stabilized etalon.