Iain Howieson

Director of R&D, Cascade Technologies

Iain Howieson is director of R&D at Cascade Technologies (Glasgow, Scotland).

(All images courtesy of Cascade Technologies)
FIGURE 1. A modular, ruggedized architecture includes interchangeable laser modules and dual-path-length gas cells, easily configured to meet particular application requirements.
Lasers & Sources

QUANTUM-CASCADE LASERS: Quantum-cascade lasers disrupt gas measurement technologies

Feb. 1, 2011
A patented quantum-cascade laser intrapulse technique is at the heart of a ruggedized, accurate, industrial measurement platform designed to disrupt conventional gas measurement...
Courtesy of Cascade Technologies
The advantages of the QC laser have been harnessed in a commercialized gas-sensor platform (top). This platform can switch up to four lasers to eight measurement points simultaneously. In a typical emissions-monitoring application (bottom), design features such as fiber coupling and in situ probes improve measurement integrity.

QUANTUM-CASCADE LASERS: Quantum-cascade lasers enable gas-sensing technology

April 1, 2007
Extensive research and manufacturing improvements are delivering the output power levels and spectral behavior necessary to prove quantum-cascade lasers viable for commercial ...
FIGURE 1. Raw data for background and transmission spectra of room air was recorded using a 1270-cm-1 QC laser with intrapulse spectroscopy. A 2000-ns pulse is applied to the laser resulting in a frequency chirp, which sweeps the laser through the spectroscopic transitions of interest. A 0.048-cm-1 germanium etalon signal confirms greater than 6-cm-1 single-mode tuning.

Quantum-cascade lasers smell success

March 1, 2005
Innovative spectroscopic techniques and advances in spectrometer hardware promise major performance and cost improvements in tunable diode-laser absorption gas sensors.