Polarization orthogonalizer for a pair of laser beams with nearly equal frequencies

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We have demonstrated a device to produce an overlapping pair of orthogonally polarized laser beams with a 3 GHz frequency offset out of a single laser beam containing the two frequency components with the same linear polarization. Our design is based on a Michelson interferometer formed by a polarizing beam splitter and two quarter-waveplates. Such a device can be used to make the polarization states of a carrier and a sideband produced through modulation mutually orthogonal. An orthogonally polarized pair of coherent laser beams can be used for an interferometric measurement of a small displacement in a heterodyne scheme or to produce a large-contrast coherent population trapping signal from alkali metal atoms. As a demonstration we used the device to achieve 40% contrast for a coherent population trapping signal from a rubidium vapor cell.

Original languageEnglish
Article number126104
JournalReview of Scientific Instruments
Volume79
Issue number12
DOIs
Publication statusPublished - 2008 Dec 1

Fingerprint

Laser beams
laser beams
Polarization
polarization
trapping
Michelson interferometers
Rubidium
Alkali metals
beam splitters
rubidium
linear polarization
sidebands
alkali metals
Demonstrations
Vapors
Modulation
vapors
modulation
Atoms
cells

ASJC Scopus subject areas

  • Instrumentation

Cite this

Polarization orthogonalizer for a pair of laser beams with nearly equal frequencies. / Yim, Sin Hyuk; Yoon, Tai Hyun; Cho, Donghyun.

In: Review of Scientific Instruments, Vol. 79, No. 12, 126104, 01.12.2008.

Research output: Contribution to journalArticle

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