Laser Metrology Heterodyne Phase-Locked Loop

TBMG-10832

01/01/2009

Abstract
Content

A method reduces sensitivity to noise in a signal from a laser heterodyne interferometer. The phase-locked loop (PLL) removes glitches that occur in a zero-crossing detector’s output [that can happen if the signal-to-noise ratio (SNR) of the heterodyne signal is low] by the use of an internal oscillator that produces a square-wave signal at a frequency that is inherently close to the heterodyne frequency.

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Citation
"Laser Metrology Heterodyne Phase-Locked Loop," Mobility Engineering, January 1, 2009.
Additional Details
Publisher
Published
Jan 1, 2009
Product Code
TBMG-10832
Content Type
Magazine Article
Language
English