The measurement of large optical frequency differences and the design of a new type of frequency chain
- Resource Type
- Conference
- Authors
- Udem, T.; Reichert, J.; Holzwarth, R.; Hansch, T.; Kourogi, M.
- Source
- Proceedings of the 1999 Joint Meeting of the European Frequency and Time Forum and the IEEE International Frequency Control Symposium (Cat. No.99CH36313) Frequency control Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European. 2:620-625 vol.2 1999
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Signal Processing and Analysis
Robotics and Control Systems
Power, Energy and Industry Applications
Frequency measurement
Optical design
Frequency conversion
Optical frequency conversion
Atom optics
Laser mode locking
Radio frequency
Clocks
Hydrogen
Laser transitions
- Language
- ISSN
- 1075-6787
We have used optical frequency interval dividers, optical frequency comb generators and mode-locked lasers to measure large optical frequency differences of up to 45.2 THz between laser frequencies. We have shown that the modes of a mode-locked laser are distributed uniformly in frequency space within the experimental limit of 3.0 parts in 10/sup 17/ and that the mode separation equals the pulse repetition rate within the experimental limit of 6.0 parts in 10/sup 16/. We applied these techniques to determine the absolute frequencies of the cesium D/sub 1/ line at 335 THz (895 nm), the hydrogen 1S-2S transition at 2466 THz (121 nm) and the frequency of a methane stabilized He-Ne laser at 88.4 THz (3.39 /spl mu/m) as well as the isotope shift of the 1S-2S frequency.