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Displaying 351 - 375 of 469

Optical and microwave frequency synthesis with an integrated fiber frequency comb

May 21, 2006
Author(s)
L Hartl, Martin E. Fermann, W Swann, John J. McFerran, Ian R. Coddington, Qudsia Quraishi, Scott A. Diddams, Nathan R. Newbury, Carston Langrock, M M. Fejer, P. S. Westbrook, Jeffrey W. Nicholson, K Feder
We demonstrate optical coherence over a broad spectral range of two independent fiber frequency combs. Additionally, we demonstrate microwave stability of better than 2x10 -14 in 1 second for an optically integrated fiber frequency comb.

Frequency-Resolved Coherent LIDAR using a Femtosecond Fiber Laser

March 15, 2006
Author(s)
William C. Swann, Nathan R. Newbury
We demonstrate a coherent lidar that uses a broadband femtosecond fiber laser as a source and resolves the returning heterodyne signal into N spectral channels by using an arrayed-waveguide grating. The data are processed incoherently to yield an N-times

Response Dynamics of the Frequency Comb Output from a Femtosecond Fiber Laser

December 26, 2005
Author(s)
Brian Washburn, William C. Swann, Nathan R. Newbury
The frequency comb from a mode-locked fiber laser can be stabilized through feedback to the pump power. An understanding of the mechanisms and bandwidth governing this feedback is of practical importance for frequency comb design and of basic interest

Wavelength References for Interferometry in Air

December 12, 2005
Author(s)
Richard W. Fox, Brian R. Washburn, Nathan R. Newbury, Leo W. Hollberg
Interferometer sources with multiple known wavelengths can be provided by tunable lasers and calibrated optical reference cavities. The mode wavelengths are known by measuring a laser¿s frequency while locked to the mode in vacuum during a calibration step

Wavelength references for interferometry in air

December 1, 2005
Author(s)
R W. Fox, Brian R. Washburn, Nathan R. Newbury, Leo W. Hollberg
Cavity-mode wavelengths in air are determined by measuring a laser's fequency while it is locked to the mode in vacuum during a caibration step and subsequently correcting the mode wavelength for atmospheric pressure compression, temperature difference

Theory of the Frequency Comb Output from a Femtosecond Fiber Laser

November 1, 2005
Author(s)
Nathan R. Newbury, Brian Washburn
The output of a femtosecond fiber laser will form a frequency comb that can be phase-locked through feedback to the cavity length and pump power. A perturbative theory is developed to describe this frequency comb output, in particular for a solitonic fiber

High-accuracy near infrared wavelength and frequency reference developments at NIST

September 23, 2005
Author(s)
William C. Swann, Sarah L. Gilbert, Brian Washburn, Nathan R. Newbury
NIST research on near infrared frequency and wavelength references is presented. A new high accuracy wavelength calibration transfer standard, SRM 2519a, based on molecular absorption lines of H13C14N is described. Research on optical frequency combs

Fiber Laser Frequency Combs and their Control

July 25, 2005
Author(s)
Nathan R. Newbury, Brian Washburn, William C. Swann, Jeffrey W. Nicholson, K Feder, Paul S. Westbrook
Fiber laser-based frequency combs can provide a comb of well-defined spectral lines across the near-infrared, including the telecommunication. We discuss these frequency combs with an emphasis on the mechanisms used to phase-lock the combs.

Optical frequency metrology using spectrally tailored continuum from a nonlinear fiber grating

July 25, 2005
Author(s)
Kyoungsik Kim, Brian R. Washburn, C. W. Oates, Leo W. Hollberg, Nathan R. Newbury, Scott Diddams, Paul S. Westbrook, Jeffrey W. Nicholson, K Feder
We report the significant enhancement (24 dB) of the optical beat note between a 657-nm CW laser and the tailored continuum generated with a nonlinear fiber Bragg grating. The same continuum is used to stabilize the offset frequency of a Cr:forsterite

Optical frequency metrology using spectrally tailored continuum from a nonlinear fiber grating

July 25, 2005
Author(s)
Kyoungsik Kim, Brian R. Washburn, Christopher W. Oates, Leo W. Hollberg, Nathan R. Newbury, Scott A. Diddams, P. S. Westbrook, Jeffrey W. Nicholson, K Feder
We report the significant enhancement (-24 dB) of the optical beat note between a 657-nm CW laser and the tailored continuum generated with a nonlinear fiber Bragg grating. The same continuum is used to stabilize the offset frequency of a Cr:forsterite

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.

A variable repetition rate frequency comb for infrared frequency metrology

May 22, 2005
Author(s)
Brian Washburn, R W. Fox, William C. Swann, Nathan R. Newbury, Jeffrey W. Nicholson, K Feder, Paul S. Westbrook
A frequency comb generated by a variable repetition rate mode-locked fiber laser is presented. The spacing of the frequency comb can be scanned while one comb tooth is phase-locked to a stable RF source.

Frequency Comb Dynamics of a Solitonic Fiber Laser: Theory

May 22, 2005
Author(s)
Nathan R. Newbury, Brian Washburn
The effects of Raman, self-steepening and higher-order dispersion on a fiber-laser frequency comb are analyzed using perturbation theory. Transfer functions are derived for the comb response to change in cavity length or pump power.
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