Fast frequency modulation of a far‐infrared laser by means of the varactor effect in a micron‐size Schottky barrier diode is presented. A cavity tuning experiment carried out with the optically pumped HCOOH line at 403.7 GHz and a Pt–n‐GaAs diode is described. Modulation depth of about 15 kHz with a bandwidth of approximately 2 MHz has been achieved.

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© 1980 American Institute of Physics.
1980
American Institute of Physics
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