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From relative to absolute: optical phase measurement and control in ultrashort pulses

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8 Author(s)
Ye, J. ; Joint Inst. for Lab. Astrophys., Nat. Inst. of Stand. & Technol., Boulder, CO, USA ; Cundiff, S.T. ; Foreman, S. ; Fortier, T.
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Summary form only given. A phase stabilized frequency comb spanning an entire optical octave (>300 THz) has been established, leading to a single step, phase coherent connection between the optical and radiofrequency spectral domains. The precision comb can also serve as an accurate gear-box to transfer the oscillatory information of a laser stabilized by a high quality optical transition down to the microwave/rf domain, thereby establishing a simple optical atomic clock. We present one of the systems based on an optical transition of iodine molecules, providing an rf clock signal with a frequency stability comparable to that of an optical standard, and that is superior to almost all conventional rf sources. To realize a high-power CW optical frequency synthesizer, a separate widely tunable single-frequency cw laser has been employed to randomly access the stabilized optical comb and lock to any desired comb component.

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Lasers and Electro-Optics Society, 2002. LEOS 2002. The 15th Annual Meeting of the IEEE  (Volume:1 )

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