Pressure-tunable cw PbSe injection laser

A study was made of the influence of hydrostatic pressures up to 1.8 kbar on the emission spectra of a cw PbSe injection laser at temperatures of 4.2 and 20.3 °K. The quasicontinuous tuning range was 8.2–9.2 μ (1090–1220 cm^–1). The measured rates of continuous change of the mode frequency with the current and pressure reached (+0.01 ± 0.003) cm^–1/mA and (-0.026 ± 0.001) cm^–1/bar. The continuous pressure-tuning range was ~1.7 cm^–1. At 20.3 °K the laser emitted a single mode of about 25 μW power. The pressure-tunable PbSe laser was used in the determination of the transmission spectra of Ge standards with a resolution of 10^–2 cm^–1.