Ultrastable optical frequency reference at 1.064 μm using a C2HD molecular overtone transition |
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| Authors: | Jun Ye Long-Sheng Ma Hall J.L. |
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| Affiliation: | Nat. Inst. of Stand. & Technol., Colorado Univ., Boulder, CO; |
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| Abstract: | ![]()
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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