Title :
Direct demodulation of a 10.6µm FM signal with an NH2D stark cell
Author :
Abrams, R.L. ; Asawa, C.K.
Author_Institution :
Hughes Research Laboratories, Malibu, CA, USA
fDate :
10/1/1976 12:00:00 AM
Abstract :
A new technique for direct demodulation of a 10.6-μm FM signal using a Stark absorption cell is described. A Stark tunable absorption line in NH2D is used to track the time-varying frequency of the incoming FM laser signal using a closed servo loop. The demodulated FM signal is proportional to the feedback voltage applied to the Stark cell. Demodulation at frequencies up to 5 kHz has been demonstrated, the rate being limited only by the bandwidth of the available servo electronics.
Keywords :
Demodulation; Frequency modulation; Nonlinear optics; Optical feedback; Optical interferometry; Optical mixing; Optical refraction; Optical scattering; Optical variables control; Refractive index;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.1976.1069052
