TY - JOUR AU - L.-S. Ma AU - Jun Ye AU - Pierre Dubé AU - John Hall BT - Journal of the Optical Society of America B DA - 1999-12 DO - 10.1364/JOSAB.16.002255 PY - 1999 EP - 2255 T2 - Journal of the Optical Society of America B TI - Ultrasensitive frequency-modulation spectroscopy enhanced by a high-finesse optical cavity: theory and application to overtone transitions of C2H2 and C2HD VL - 16 SN - 0740-3224 ER -