TY - JOUR AU - J Ye AU - L Ma AU - John Hall C2 - Optics Letters DA - 1996-12-01 00:12:00 LA - en M1 - Vo. 21 PB - Optics Letters PY - 1996 TI - Sub-Doppler Optical Frequency Reference at 1.064 υm Via Ultrasensitve Cavity-Enhanced FM Spectroscopy of C2HD Overtone Transition ER -