Phase-locked laser system for use in atomic coherence experiments

Alberto M. Marino, C. R. Stroud

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

We describe a phase-coherent laser system designed for use in experiments involving coherently prepared atomic media. We implement a simple technique based on a sample-and-hold circuit together with a reset of the integrating electronics that makes it possible to scan continuously the relative frequency between the lasers of over tens of gigahertz while keeping them phase locked. The system consists of three external-cavity diode lasers operating around 795 nm. A low-power laser serves as a frequency reference for two high-power lasers which are phased locked with an optical phase-locked loop. We measured the residual phase noise of the system to be less than 0.04 rad2. In order to show the application of the system towards atomic coherence experiments, we used it to implement electromagnetically induced transparency in a rubidium vapor cell and obtained a reduction in the absorption coefficient of 92%.

Original languageEnglish
Article number013104
JournalReview of Scientific Instruments
Volume79
Issue number1
DOIs
StatePublished - 2008
Externally publishedYes

Fingerprint

Dive into the research topics of 'Phase-locked laser system for use in atomic coherence experiments'. Together they form a unique fingerprint.

Cite this