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We have been developing a new clock laser system for an Yb optical lattice clock. The system does not include a high finesse cavity at 578 nm, but a fibre-based frequency comb, which is tightly phase-locked to a narrow linewidth Nd:YAG laser at 1064 nm. The Nd:YAG laser is phase locked to a high finesse cavity at 1064 nm made from ultra low expansion glass.
We have developed single frequency and single spatial mode laser structures with very narrow linewidth (~850 kHz @ 15 mW measured with an ECL). We demonstrate also a very good interaction between the DFB laser and Cs atoms.
An experimental evidence of electromagnetically induce narrowing of an absorption line is presented. The width of this resonance is sub-Doppler and subnatural and it is confined between two closely spaced electromagnetically induced transparency windows.
We narrow the line width of a 1083 nm laser by phase-locking to an Nd:YAG non-planar ring oscillator (NPRO) via an optical frequency comb. The comb transfers the narrow linewidth of the iodine-stabilized NPRO (<2 kHz) from 1064 nm to thousands of wavelengths throughout the visible and infrared regimes. Lasers phase-locked to the comb will have the narrow linewidth of the NPRO. We demonstrate this...
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