Jitter reduction of the 729 nm clock laser for a Ca+ optical frequency standard
- Resource Type
- Conference
- Authors
- Zumsteg, C.; Hagel, G.; Champenois, C.; Guyomarc'h, D.; Houssin, M.; Knoop, M.; Vedel, M.; Vedel, F.; Dube, P.
- Source
- 2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum Frequency Control Symposium, 2007 Joint with the 21st European Frequency and Time Forum. IEEE International. :123-127 May, 2007
- 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
Jitter
Clocks
Frequency
Laser transitions
Ring lasers
Lasers and electrooptics
Particle beam optics
Stationary state
Metastasis
Statistics
- Language
- ISSN
- 2327-1914
2327-1949
The electric quadrupole transition between the ground state and the first metastable state of a single Ca + ion is an attractive choice for a frequency standard in the optical domain. Probing of the clock transition is carried out using quantum jump statistics which requires cycle times of several seconds. The spectral linewidth of the probe laser (local oscillator) must reach the hertz level for a duration at least as long as these cycle times. To reduce the TiSa laser linewidth at 729 nm, we use a KD*P electro-optic modulator (EOM) inside the laser cavity. This device shows a couple of mechanical resonances induced by piezo-electric ringing at frequencies larger than 50 kHz, limiting notably the use of the device for frequency corrections. Actual performances (Δv < 1 kHz for τ < 1ms) of our laser set-up allow the observation of a preliminary spectrum with Zeeman splitting of the 729 nm transition of a single trapped Ca+ ion.