Tunable cw laser emission has been obtained near 5.3 μm from InSb samples at ∼10 K optically pumped with GaAs, Nd : YAG, and CO lasers. InSb laser thresholds have been determined as a function of incident pump wavelength and applied magnetic fields from 0 to 9.5 kOe. Temperature and magnetic field tuning have been utilized to obtain NO absorption spectra over a 10−cm−1 range.
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Pine et al. (1975) studied this question.