Tunable cw Pb0.98 Cd0.02S diode lasers emitting at 3.5 μm: Applications to ultrahigh-resolution spectroscopy
- 15 June 1973
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 22 (12) , 677-679
- https://doi.org/10.1063/1.1654550
Abstract
Continuously tunable cw diode lasers that produce narrow‐line (1‐ to 10‐MHz linewidth) radiation in the 3.5‐μm region have been fabricated from Pb0.98Cd0.02S. Lasers operating at 10–20 K produced more than 1 mW of cw power distributed among several modes which could be tuned continuously > 1 cm−1 by adjusting the laser current. A spectral range of 30 cm−1 could be covered over the full operating range. Ultrahigh‐resolution (10−5 cm−1) spectra of H2CO have been obtained to demonstrate the potential application of these lasers to the identification of organic molecules by spectroscopy of their C–H stretch absorption bands.Keywords
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