Design of a 3/2-Order Phase-Locked Loop for Improved Laser Probe Resolution

1 December 1985

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement

Vol. IM-34 (4) , 660-664
https://doi.org/10.1109/tim.1985.4315430

Abstract

A 3/2-order phase-locked loop (PLL) was realized in order to increase the ultimate resolution of a heterodyne laser probe. The essential features of this PLL include: large-scale static-gain tuning, phase margin of 45°, and constant transfer function Q-factor (√2). A linearized theory was developed, pointing out the advantages of the 3/2 order. The PLL developed for the laser probe can be used for many other applications when rejection of low-frequency phase fluctuations of a signal is needed.

Keywords

OPTICAL DESIGN
PHASE LOCKED LOOPS
PROBES
OPTICAL SURFACE WAVES
OPTICAL INTERFEROMETRY
OPTICAL FILTERS
OPTICAL MIXING
ACOUSTIC BEAMS
LASER TUNING
SURFACE ACOUSTIC WAVES

This publication has 1 reference indexed in Scilit:

Acousto-optics—A review of fundamentals
Proceedings of the IEEE, 1981