Far‐infrared emission has been observed from an InSb spin‐flip Raman laser where a mode‐locked TEA CO2laser is used as the pump source. 400 &mgr;W of power are generated in 2‐nsec pulses near 100 &mgr;m. This contrasts with the usual two‐crystal scheme where one crystal is used to generate the Raman Stokes signal and a second InSb crystal is used as a mixer crystal. This experimental simplification allows for a much more direct evaluation of the usefulness of the spin‐flip Raman laser as a source of far‐infrared radiation. It is concluded that current technology permits construction of a spin‐flip Raman far‐infrared spectrometer tunable over about 60–125 cm−1.