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Frequency stability measurements of 1.5 μm erbium lasers locked to acetylene absorption lines

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2 Author(s)
Svelto, C. ; Dept. of Electron. & Inf., Politecnico di Milano, Italy ; Bava, Elio

We report on the absolute frequency stabilization of Yb-Er:glass lasers against different acetylene absorption lines in the 1.5 μm spectral region. An external frequency modulation technique was adopted to independently stabilize 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 frequency. From the beat signal analysis, a 1 ms laser linewidth of 50 kHz was 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 4×10-11 around 0.1 s

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:48 ,  Issue: 2 )

Date of Publication:

Apr 1999

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