Absolute frequency stabilization of a tunable Tm:Ho:YAG laser to the HBr P(12) line at 2097 nm.
We demonstrate absolute frequency stabilization of a widely tunable Tm:Ho:YAG laser by locking the oscillator to the P(12) absorption line of the H(79)Br molecule at 2097.222 nm, using the fringe side-locking technique. We perform time and spectral analysis of open- and closed-loop error signals to evaluate the frequency noise. In closed-loop operation a long-term frequency stability of better than 2 MHz with rms frequency fluctuations of approximately 112 kHz is obtained over an observation time of 10(3) s.
Marano
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Istituto Nazionale per Fisica della Materia, Dipartimento di Fisica del Politecnico di Milano, and Centro di Elettronica Quantistica e Strumentazione Elettronica-Consiglio Nazionale delle Ricerche, Piazza Leonardo da Vinci 32, 20133 Milan, Italy.
Laporta
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P
Sapia
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A
De Natale
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P