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Ultrastable optical frequency reference at 1.064 μm using a C 2HD molecular overtone transition

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3 Author(s)
Ye, J. ; Nat. Inst. of Stand. & Technol., Colorado Univ., Boulder, CO, USA ; Long-Sheng Ma ; Hall, J.L.

Saturated molecular overtone transitions in the visible and near infrared can be detected with record-high sensitivities using our cavity-enhanced frequency modulation technique. We have stabilized a Nd:YAG laser onto the P(5) line in (ν2+3ν3) overtone band of C2HD at 1.064 μm and established its absolute frequency. Excellent signal-to-noise ratio produced an Allan variance of 3.4×10-13 at 1 s averaging, improving to 1×10-14 after 800 s. Selection of slow molecules with low power and gas pressure gave a linewidth 13 times below the room temperature transit time limit

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Instrumentation and Measurement, IEEE Transactions on  (Volume:46 ,  Issue: 2 )