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Search Publications by: William C. Swann (Fed)

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Displaying 276 - 300 of 317

Absolute frequency measurements with a stabilized near-infrared optical frequency comb from a Cr:forsterite laser

February 15, 2004
Author(s)
Kristan L. Corwin, I Thomann, A Bartels, Tasshi Dennis, W. Fox, William C. Swann, E. A. Curtis, C. W. Oates, G Wilpers, Sarah L. Gilbert, Leo W. Hollberg, Nathan R. Newbury, Scott A. Diddams, Jeffrey W. Nicholson, M. Yan
A frequency comb is generated with a chromium-doped forsterite femtosecond laser, spectrally broadened in dispersion-shifted highly nonlinear fiber, and stabilized. The resultant evenly spaced comb of frequencies ranges from 1.1 to beyond 1.8 υm. The

The NIST Traceable Reference Material Program for Wavelength Reference Absorption Cells

August 1, 2003
Author(s)
Timothy J. Drapela, Sarah L. Gilbert, William C. Swann, Chih-Ming Wang
A program is described by which commercially produced wavelength-calibration gas-absorption cells may be related to primary standards maintained by the National Institute of Standards and Technology (NIST) and Standard Reference Materials produced by NIST

Interleaved, Sampled Fiber Bragg Gratings for use in Hybrid Wavelength References

December 1, 2002
Author(s)
Michael W. Rabin, William C. Swann, Sarah L. Gilbert
We discuss the design and fabrication of interleaved, sampled fiber Bragg gratings (ISFBGs) for use in hybrid wavelength calibration references covering the 1300 nm to 1600 nm region. We demonstrate use of sampled phase masks (SPMs) to make sampled

Four-state measurement method for polarization dependent wavelength shift

September 1, 2002
Author(s)
William C. Swann, Shellee D. Dyer, Rex M. Craig
We present a novel four-state method for measuring the polarization dependent wavelength shift (PDW) of a fiber Bragg grating. We show that measurement of the grating's wavelength for only four different polarization states is sufficient to completely

Wavelength Calibration Standards for the WDM L-Band

September 1, 2001
Author(s)
William C. Swann, Sarah L. Gilbert
We describe National Institute of Standards and Technology research on wavelength standards for the optical communications L-band. We are developing a pair of transfer standards that can be used to calibrate the wavelength scale and scan linearity of

Wavelength References for 1300 nm and L-Band WDM

March 1, 2001
Author(s)
Tasshi Dennis, William C. Swann, Sarah L. Gilbert
We have surveyed potential references for 1300 nm and L-band wavelength calibration. We have developed a 1314 nm methane reference for our internal calibration and are developing a carbon-monoxide transfer standard for the 1560-1630 nm region.

Wavelength References for Wavelength Division Multiplexing

January 1, 2001
Author(s)
Sarah L. Gilbert, Tasshi Dennis, William C. Swann
We describe NIST research on wavelength standards for optical fiber communications. We have developed transfer standrds that can be used to calibrate instruments in the 1510-1560 nm region and a investigating references for other regions.