TY - JOUR AU - John Hall AU - Jun Ye BT - Optics and Photonics News DA - 2001-01 PY - 2001 SP - 44 EP - 50 T2 - Optics and Photonics News TI - Merging the Ultrasensitive, the Ultrastable, and the Ultrafast: A New Era of Frequency Standards and Optical Frequency Measurement VL - 12 ER -