Abstract
The principal noise of the Laser Doppler Velocimeter is shown to be due to transit broadening rather than the most commonly suggested signal shot; the phase ambiguity noise is also shown as less serious for the dual-beam Laser Doppler Velocimeter. On the basis of optical geometry and Fourier analysis of electric fields interacting with moving particles, the transit broadening noise has been calculated; some supporting experimental evidence is also discussed along with means for reducing this principal noise.
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