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WebJul 12, 2001 · We have constructed an optical clock based on the 1.064-PHz (282 nm) electric-quadrupole transition in a laser-cooled, single 199 Hg + ion. The optical frequency is phase-coherently divided down to provide a coherent microwave output through the use of a mode-locked femtosecond laser and a microstructured optical fiber. WebMay 15, 2008 · We report the first use of a bimetallic buckling disk as a thermal conduction switch. The disk is used to passively alter the thermal resistance of the package of a chip scale atomic clock. A vertical-cavity surface-emitting laser and a cesium vapor cell, contained in the clock, must be maintained at 70±0.1°C even under an ambient … fused beads for xrf

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