C. Svelto et E. Bava, Frequency stability measurements of 1.5 mu m erbium lasers locked to acetylene absorption lines, IEEE INSTR, 48(2), 1999, pp. 537-539
Citations number
12
Categorie Soggetti
Instrumentation & Measurement
Journal title
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
We report on the absolute frequency stabilization of Yb-Er: glass lasers ag
ainst different acetylene absorption lines in the 1.5 mu m spectral region.
An external frequency modulation technique was adopted to independently st
abilize two diode-pumped erbium microlasers against the P(15) rovibrational
line at 1534.099 nm. A long-term frequency stability below 10(-9) (200 kHz
) was measured on both the closed-loop error signal and on the beat note fr
equency. From the beat signal analysis, a 1 ms laser linewidth of 50 kHz wa
s observed. The Allan standard deviation of the beat frequency was below 10
(-10) for integration times between 10 ms and 1 s and as low as 4 x 10(-11)
around 0.1 s.