A compact pulsed RGB laser source based on periodically-poled MgO doped SLT pumped at 532 nm is reported. The operation of the source at near-room temperature and at high temperature is evaluated for optimal performance.
We describe the detection of trace amount of ozone in a gas mixture at atmospheric
pressure using excitation by the fourth harmonic of a Nd:YAG laser at 266 nm and
measurement by photoacoustic detection. We show that a sensitivity of 10 ppbV can be
In this paper the recent developments in the field of diode-laser photoacoustics will be discussed. Photoacoustic detector designs with high sensitivity and signal-to-noise ratio will be presented. The advantages and disadvantages of different modulation and measurement techniques will be discussed and compared. Simple expressions will be given for an estimation of the sensitivity achievable with an optimized photoacoustic detector. Recent results will be presented for a state-of-the-art dual-resonator differential cell suitable for sensitive trace gas analysis with low electronic and acoustic noise. With this resonant photoacoustic cell and a near-infrared DFB diode laser with 42 mW power at 1.53 mm polar ammonia molecules could be detected with a sensitivity of 200 parts-per-billion volume (ppbv) under flow conditions used to reduce the adsorption problem. By excitation of fundamental vibrations in methane using a pulsed optical parametric oscillator (OPO) with 60 mW output power a sensitivity of 1.2 ppbv has been achieved using this resonant cell. This setup allows sub-ppbv detection of the greenhouse gas methane with a concentration of about 1.7 ppmv in ambient air.
We describe the design and performance of an all solid state uv laser source that produces several hundred milliwatts at 266 nm and up to one hundred milliwatts at 213 nm. Examples of using this source to ablate borosilicate glass and to expose (beta) -chloroethyl silsequioxane on silicon are discussed.
Difference frequency mixing in KTiOAsO4 (KTA) of an injection-seeded pulsed Ti-sapphire ring laser and a Q-switched Nd:YAG laser has produced high power output from 2.65 micrometers to 5.3 micrometers .
Conference Committee Involvement (1)
Ultrafast Optics 2017
8 October 2017 | Jackson Hole, Wyoming, United States