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Linewidth narrowing of 10 mu m diode lasers by external feedback

: Parvitte, B.; Zeninari, V.; Courtois, D.; Delahaigue, A.; Thiebeaux, C.; Beyer, T.; Schlegelmich, H.; Lambrecht, A.; Tacke, M.


Journal of quantitative spectroscopy & radiative transfer 59 (1998), Nr.3/5, S.361-368 : Ill., Lit.
ISSN: 0022-4073
Fraunhofer IPM ()
diode laser; Diodenlaser; external resonator; externer Resonator; mid infrared; mittleres Infrarot

The spectral emission of a mid-infrared diode laser at 10 mu m is investigated by two different techniques. The fringes of a high finesse confocal etalon and the beats with a stabilized carbon dioxide laser are recorded. The conjugate effects of electronic frequency stabilization by using low-pressure gas molecule absorption and the controlled optical feed-back in an external cavity are shown. The linewidth is reduced from 65 to 20 MHz.