High-resolution spectroscopy of the 39K transitions at 770 nm and 13C 2H 2 saturated lines by a solid-state laser at 1.54 μm: Toward an accurate frequency standard in the optical communication band

Cesare Svelto*, Gianluca Galzerano, Elio Bava, Fabio Ferrario, Ady Arie, R. Klein, M. A. Arbore, M. A. Fejer, Atsushi Onae, Marcello Marano

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A novel and compact Er-Yb: glass laser was developed with single-frequency output power > 10 mW in a wavelength range from 1531 to 1547 nm. The laser output was efficiently frequency doubled at 770.1 nm in a single-pass periodically poled lithium niobate waveguide and a second harmonic power in excess of 15 μW was achieved, with an internal conversion efficiency of ∼ 220% W -1. This frequency-doubled beam was used for high-resolution saturated spectroscopy of the 39K 4S 1/2-4P 1/2 absorption line. The best resolved crossover peak showed 16% line contrast and 10-MHz linewidth. In a second experiment, working at the fundamental frequency, saturation spectroscopy of 13C 2H 2 was achieved using a low-pressure gas cell inside a build-up cavity. The measured absorption dip has 3% line contrast and 1.2 MHz linewidth. Both the atomic and molecular saturated lines are very well suited for frequency locking in order to establish accurate frequency standards in the optical communication band.

Original languageEnglish
Pages (from-to)764-769
Number of pages6
JournalIEEE Transactions on Instrumentation and Measurement
Volume51
Issue number4
DOIs
StatePublished - Aug 2002

Keywords

  • 1.5 μm
  • Acetylene
  • Erbium
  • Frequency stability
  • Potassium
  • Solid (state) laser
  • Spectroscopy

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