| Autor: |
J. von Zanthier, Herbert Walther, Petrissa Eckle, Ch. Schwedes, M. Eichenseer, A.Yu. Nevsky |
| Rok vydání: |
2003 |
| Předmět: |
|
| Zdroj: |
2003 European Quantum Electronics Conference. EQEC 2003 (IEEE Cat No.03TH8665). |
| DOI: |
10.1109/eqec.2003.1314099 |
| Popis: |
Excitation of the /sup 3/P/sub 0 /state is detected in optical-optical double resonance via the dark periods in the fluorescence on the fast /sup 1/S/sub 0/ /sup 3/P/sub 1/ transition. The dye laser formerly used to excite this line was recently replaced by a diode-based laser system: a grating stabilized diode at 922 nm, further frequency stabilized onto a Fabry-Perot interferometer, is seeded into a tapered amplifier. Subsequent frequency-quadrupling employing a periodically poled KTP and a BBO crystal, each placed in an external enhancement cavity, leads to the right frequency at 231 nm. For the /sup 1/S/sub 0/ /sup 3/P/sub 0/ transition a resolution of 1.3 /spl times/ 10/sup -13 /has been achieved so far, limited by the frequency instability of the Nd:YAG laser. The short-term frequency stability of this laser has been strongly improved recently. With a new laser setup a linewidth < 5 Hz (FWHM) for integration times /spl times/30 s has been achieved using active vibration isolation platforms for the reference cavity. Recent progress of that work is reported. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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