High frequency wavelength modulation spectroscopy with diode lasersP. PokrowskyW. Zapkaet al.1983Optics Communications
Measurement of time dependent optical gain using frequency modulation spectroscopyW. ZapkaP. Pokrowskyet al.1982Optics Communications
Noncontact optoacoustic monitoring of flame temperature profilesW. ZapkaP. Pokrowskyet al.1982Optics Letters