Importance of rotational beam alignment in the generation of second harmonic errors in laser heterodyne interferometry

J. M. De Freitas*, M. A. Player

*Corresponding author for this work

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

We show, using a Jones matrix analysis, that rotating the two orthogonal linearly polarized inputs of a heterodyne interferometer relative to the polarizing beam splitter axes, produces second harmonic errors in an otherwise ideal interferometer. The error undergoes two cycles as the optical pathlength difference changes from 0 to 2pi. This behaviour is distinct from previously reported periodic errors resulting from polarization leakage and frequency mixing. It is found that as the angular misalignment increases, the amplitude of the periodic errors also increases, and may reach substantial values.

Original languageEnglish
Article number025
Pages (from-to)1173-1176
Number of pages4
JournalMeasurement Science and Technology
Volume4
Issue number10
DOIs
Publication statusPublished - 1 Dec 1993

Fingerprint

Heterodyne Interferometry
Laser Interferometry
laser interferometry
Interferometry
Alignment
Harmonic
alignment
harmonics
Lasers
Interferometer
Interferometers
interferometers
Matrix Analysis
Beam Splitter
Heterodyne
Misalignment
beam splitters
Leakage
misalignment
Rotating

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

Cite this

Importance of rotational beam alignment in the generation of second harmonic errors in laser heterodyne interferometry. / De Freitas, J. M.; Player, M. A.

In: Measurement Science and Technology, Vol. 4, No. 10, 025, 01.12.1993, p. 1173-1176.

Research output: Contribution to journalArticle

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