Title :
Ultrastable optical frequency reference at 1.064 μm using a C 2HD molecular overtone transition
Author :
Ye, Jun ; Ma, Long-Sheng ; Hall, John L.
Author_Institution :
Nat. Inst. of Stand. & Technol., Colorado Univ., Boulder, CO, USA
fDate :
4/1/1997 12:00:00 AM
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
Keywords :
excited states; frequency measurement; frequency modulation; laser frequency stability; measurement standards; neodymium; optical modulation; optical saturation; solid lasers; 1.064 mum; Allan variance; C2HD; C2HD molecular overtone transition; Nd:YAG; Nd:YAG laser; Nd:YAl5O12; P(5) line; cavity-enhanced frequency modulation; gas pressure; near IR range; record-high sensitivities; saturated molecular overtone transitions; signal-to-noise ratio; ultrastable optical frequency reference; visible range; Frequency modulation; High definition video; Infrared detectors; Laser stability; Laser transitions; Optical modulation; Optical recording; Optical saturation; Optical sensors; Signal to noise ratio;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
