Frequency stabilized lasers from IPS are utilized for the “fixed” laser source since the laser wavelength is extremely stable and can be precisely specified. This allows the customer to accurately select the “scanning” laser source wavelength to scan the desired DFG wavelength band by temperature tuning in their Difference Frequency Generation and Gas Sensing applications.
Gas sensing applications are generally based on absorption spectroscopy techniques where the DFG wavelength attenuation is measured within a multi-pass gas cell. Accordingly, power and wavelength stability are critical performance characteristics for both the fixed and tunable laser sources for which IPS lasers are ideal.