Title :
High-resolution spectroscopy of the 39K transitions at 770 nm and 13C2H2 saturated lines by a solid-state laser at 1.54 μm: toward an accurate frequency standard in the optical communication band
Author :
Svelto, Cesare ; Galzerano, Gianluca ; Bava, Elio ; Ferrario, Fabio ; Arie, Ady ; Klein, R. ; Arbore, M.A. ; Fejer, M.A. ; Onae, Atsushi ; Marano, Marcello
Author_Institution :
Dipt. di Elettronica e Inf., Politecnico di Milano, Italy
fDate :
8/1/2002 12:00:00 AM
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 4S12 /-4P12 / 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 13C2H2 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.
Keywords :
erbium; frequency standards; glass; infrared spectroscopy; laser transitions; laser tuning; measurement by laser beam; microcavity lasers; optical communication; optical harmonic generation; optical pumping; organic compounds; potassium; solid lasers; ytterbium; 1.54 micron; 10 mW; 15 muW; 1531 to 1547 nm; 220 percent; 770 nm; 13C2H2 saturated lines; 39K transitions; Er,Yb:glass laser; K; acetylene; atomic saturated lines; build-up cavity; compact cavity design; diode-pumped glass microlaser; frequency locking; frequency standards; frequency-doubled beam; high-resolution saturated spectroscopy; low-pressure gas cell; molecular saturated lines; optical communication band; periodically poled waveguide; second harmonic power; single-pass waveguide; solid-state laser; Absorption; Frequency conversion; Laser beams; Lithium niobate; Optical waveguides; Power generation; Power lasers; Power system harmonics; Spectroscopy; Waveguide lasers;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2002.803302