Bs. Rawat et J. Si, EFFECT OF LASER SOURCE NONLINEARITY ON OPTICAL HETERODYNE INTERFEROMETRY, International journal of infrared and millimeter waves, 17(3), 1996, pp. 507-526
In this paper, an optical heterodyne interferometric detection model w
ith a frequency-ramped laser diode ( LD) has been analyzed. The effect
of the nonlinearity of the LD source on the optical heterodyne interf
erometry has been investigated in two different ways, which are the po
wer-distortion Fourier series analysis and the harmonic distortion ana
lysis. The general formulation between the tangent of the tested phase
and the interference fringe have been presented with the analysis of
the beat signal in the frequency domain by each methodology. The numer
ical results of these formulations have been presented.