Frequency tuning of PbTe injection lasers by combined action of pressure and temperature

The radiation emitted from a PbTe injection laser was tuned in the wavelength range 5–9.6 μ using an independent optical high-pressure chamber and a cryostat with a consinuously flowing cooling agent. The wide-range (within 600 cm^–1) pressure tuning was combined with continuous temperature tuning (within 400 cm^–1). The pressure was varied from 0 to 12 kbar and the temperature from 4 to 120°K. The system was used in a laser spectrometer.