7-11 July 2014
Africa/Johannesburg timezone
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Coupled Optical Resonance Laser Frequency Stabilization

Presented by Mr. Shaun BURD on 9 Jul 2014 from 14:20 to 14:40
Type: Oral Presentation
Session: Photonics
Track: Track C - Photonics

Abstract

We have demonstrated simultaneous laser frequency stabilization of a UV and IR laser, to coupled transitions of ions in the same spectroscopic sample, by monitoring only the absorption of the UV laser. Separate signals for locking the different lasers are obtained by modulating each laser at a different frequency and using lock-in detection of the single photodiode signal. Error signals can be generated for both lasers using phase modulation transfer . Experimentally, we simultaneously lock a 369nm and a 935nm laser to the <sup>2</sup>S<sub>1/2</sub> -> <sup>2</sup>P<sub>1/2</sub> and <sup>2</sup>D<sub>3/2</sub> -> <sup>3</sup>D3/2<sub>1/2</sub> transitions respectively, of 174Yb<sup>+</sup> ions generated in a hollow cathode discharge lamp. Stabilized lasers at these frequencies are required for cooling and trapping Yb<sup>+</sup> ions in quantum information and precision metrology experiments. We use a rate equation model incorporating velocity changing collisions to explain the experimental results. This technique should be readily applicable to other ion and neutral atom systems.

Award

Yes

Level

MSc

Supervisor

Hermann Uys (HUys@csir.co.za) National Laser Centre, CSIR

Paper

No

Place

Room: D Les 102


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