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Search Publications by: Scott Diddams (Assoc)

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Displaying 401 - 425 of 631

Femtosecond laser frequency combs: optical synthesizers for precision spectroscopy and frequency metrology

June 12, 2005
Author(s)
Scott A. Diddams, A Bartels, Tara M. Fortier, Eugene N. Ivanov, Kyoungsik Kim, John J. McFerran, Windell Oskay, G Wilpers, Christopher W. Oates, James C. Bergquist, Leo W. Hollberg, Vladislav Gerginov, C E. Tanner
A femtosecond laser frequency comb (FLFC) is the broadband (octave-spanning) evenly-spaced array of optical frequencies that is present in the output of a femtosecond mode-locked laser. Such frequency combs immediately found wide-spread use in optical

The Measurement of Optical Frequencies

June 7, 2005
Author(s)
Leo W. Hollberg, Scott A. Diddams, A Bartels, Tara M. Fortier, Kyoungsik Kim
Even the suggestion of counting optical frequencies in the visible (~ 500 THz) must have seemed ludicrous to many in the past, because traditional methods failed to work above about 100 GHz. Nonetheless, with some vision and new ideas a few researchers had

Stabilized frequency comb with a self-referenced femtosecond Cr:forsterite laser

May 27, 2005
Author(s)
Kyoungsik Kim, Brian R. Washburn, G Wilpers, C. W. Oates, Leo W. Hollberg, Nathan R. Newbury, Scott Diddams, Jeffrey W. Nicholson, M. Yan
The frequency comb of a Cr:forsterite femtosecond laser is stabilized using the f-to-2f self-referencing technique. The frequency noise of the comb components at 1064, 1314, and 1550nm differs significantly from the noise of f0.

Low noise synthesis of microwave signals from an optical source

May 26, 2005
Author(s)
John J. McFerran, Eugene N. Ivanov, A Bartels, G Wilpers, Christopher W. Oates, Scott A. Diddams, Leo W. Hollberg
We demonstrate the low noise synthesis of a harmonic comb of microwave frequencies using a femtosecond laser based synthesiser that is referenced to a cabity-stabilised laser. The residual phase noise is ~ -110dBc/Hz at 1 Hz from the 10 GHz harmonic. An

Ultra-high Stability Optical Frequency Standard Based on Laser-Cooled Neutral Calcium

May 22, 2005
Author(s)
G Wilpers, Christopher W. Oates, Scott A. Diddams, A Bartels, Windell Oskay, James C. Bergquist, Leo W. Hollberg
A beatnote between the Ca and Hg+ optical frequency standards via a mode-locked fs-laser frequency comb demonstrates the highest frequency stability measured to date. The high stability accelerates evaluation of the Ca standard's systematic shifts.

Optical frequency / wavelentgh references

April 25, 2005
Author(s)
Leo W. Hollberg, Christopher W. Oates, G Wilpers, C Hoyt, Zeb Barber, Scott A. Diddams, W Oskay, James C. Bergquist
Ideas for using visible light from atomic transitions for precision instrumentation and metrology go back at least to the 1800's. There are several good reasons to use optical frequencies, and with the scientific and technological advances of the last

International Comparisons of Femtosecond Laser Frequency Combs

April 1, 2005
Author(s)
Long-Sheng Ma, Zhiyi Bi, A Bartels, Lennart Robertsson, Massimo Zucco, Robert Windeler, G Wilpers, Christopher W. Oates, Leo W. Hollberg, Scott A. Diddams
Two types of international comparisons of femtosecond laser frequency combs have been performed in France and the USA. Five combs were involved in the comparisons. Three combs, of which two are transportable, employ nonlinear photonic crystal fiber (PCF)

Stabilized frequency comb with a self-referenced femtosecond Cr:forsterite laser

April 1, 2005
Author(s)
Kyoungsik Kim, Brian R. Washburn, G Wilpers, Christopher W. Oates, Leo W. Hollberg, Nathan R. Newbury, Scott A. Diddams, Jeffrey W. Nicholson, M. F. Yan
A frequency comb is generated with a Cr:forsterite femtosecond laser, spectrally broadened through a highly nonlinear optical fiber to span from 1.0 υm to 2.2 υm, and stabilized using the f-to-2f self-referencing technique. The repetition rate and the
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