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Search Publications by: Ian Coddington (Fed)

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Displaying 76 - 100 of 128

Rapid, high resolution frequency comb measurements

February 13, 2011
Author(s)
Ian R. Coddington, Fabrizio R. Giorgetta, Esther Baumann, William C. Swann, Nathan R. Newbury
Frequency combs serve as an extremely high accuracy reference across broad portions of the optical spectrum. Dual frequency combs harness this accuracy and allow for fast and highly flexible measurements of passive and active sources.

Performance of a coherent dual frequency comb spectrometer

January 1, 2011
Author(s)
Nathan R. Newbury, Esther Baumann, Ian R. Coddington, Fabrizio R. Giorgetta, William C. Swann, Alexander M. Zolot
We discuss the performance of a coherent dual frequency comb spectrometer in terms of signal-to-noise ratio, resolution, and accuracy based on experimental data in the near and short-wave infrared centered at 1.5 and 3.4 micrometers.

High precision, broadband optical measurements with fiber laser frequency combs

November 2, 2010
Author(s)
Nathan R. Newbury, Ian R. Coddington, Esther Baumann, Fabrizio R. Giorgetta, William C. Swann, Alexander M. Zolot
Optical frequency combs have been used extensively, and with remarkable success, to measure the absolute frequency of cw lasers. The use of frequency combs has also expanded to include applications such as precision ranging, component metrology, and

Fast high-resolution frequency agile spectroscopy of laser sources

October 24, 2010
Author(s)
Fabrizio R. Giorgetta, Ian R. Coddington, Esther Baumann, William C. Swann, Nathan R. Newbury
Time-resolved, high-accuracy and high-resolution spectroscopy of frequency-agile cw lasers is critical to realizing their full potential for sensing, but is not possible with conventional spectroscopy methods. We demonstrate a dual comb-based spectrometer

Dual frequency comb Fourier transform spectroscopy

October 12, 2010
Author(s)
Ian R. Coddington, William C. Swann, Nathan R. Newbury
Dual coherent frequency combs can be used in Fourier transform spectroscopy (FTS) to generate the full optical response of a sample with high frequency, and time, accuracy and resolution. The approach can be viewed equally well as a multiheterodyne

Broadband coherent spectroscopy in the near infrared using dual coherent frequency combs

August 15, 2010
Author(s)
Nathan R. Newbury, Ian R. Coddington, Esther Baumann, Fabrizio R. Giorgetta, William C. Swann, Alexander M. Zolot
Fiber-based frequency combs can provide broadband coherent light that enables new possibilities for high-accuracy, high-resolution broadband spectroscopy. We use a configuration with two coherently phase-locked combs; the output of one comb passes through

Spectroscopy with a coherent dual frequency comb interferometer at 3.4 mm

August 1, 2010
Author(s)
Esther Baumann, Fabrizio R. Giorgetta, Ian R. Coddington, William C. Swann, Nathan R. Newbury
A coherent dual fiber-comb spectrometer centered at 1.5 µm wavelengths is transferred to 3.4 µm by difference-frequency generation with a 1064 nm cw laser. It is shown that the residual linewidth between the comb teeth at 3.4 µm is resolution-limited to

Sensitivity scaling of dual frequency comb spectroscopy

June 15, 2010
Author(s)
Ian R. Coddington, William C. Swann, Nathan R. Newbury
Coherent dual comb spectroscopy can harness many inherent strengths of frequency combs to provide high-resolution, high-accuracy measurements of a sample response (in both magnitude and phase) on a single detector. We will discuss the noise scaling

Tunable laser spectroscopy referenced with dual frequency combs

June 15, 2010
Author(s)
Fabrizio R. Giorgetta, Ian R. Coddington, Esther Baumann, William C. Swann, Nathan R. Newbury
Frequency combs provide broadband spectroscopic measurements with high frequency accuracy and precision. However, because the comb power is distributed over a broad spectrum, the sensitivity can be low unless some form of multiplexed detection or cavity

Dual frequency combs at 3.4 mm with subhertz residual linewidths

May 1, 2010
Author(s)
Esther Baumann, Fabrizio R. Giorgetta, Ian R. Coddington, William C. Swann, Nathan R. Newbury
Two coherent 1.5-µm frequency combs are transferred to 3.4 µm by difference frequency generation with a 1064 nm cw laser. From a multi-heterodyne measurement, the residual linewidth between the comb teeth is resolution-limited at 200 mHz.

Dual frequency-comb sampling of a quasi-thermal incoherent light source

May 1, 2010
Author(s)
Fabrizio R. Giorgetta, Ian R. Coddington, William C. Swann, Esther Baumann, Nathan R. Newbury
Dual, coherent frequency combs are used to measure the spectrum of an incoherent, quasi-thermal source through Fourier spectroscopy. The source spectrum is acquired over 1THz bandwidth with an absolute frequency accuracy set by the combs.

Fast and accurate comb-based spectral analysis of a frequency agile CW laser

May 1, 2010
Author(s)
Fabrizio R. Giorgetta, Ian R. Coddington, Esther Baumann, William C. Swann, Nathan R. Newbury
The time-resolved frequency spectrum of a frequency agile CW laser is measured with a 300υs update rate and 3 kHz resolution/accuracy over a 28 nm wavelength range with a coherent dual comb setup.

Sensitivity of coherent dual-comb spectroscopy

March 31, 2010
Author(s)
Nathan R. Newbury, Ian R. Coddington, William C. Swann
Coherent dual comb spectroscopy can provide high-resolution, high-accuracy measurements of a sample response in both magnitude and phase. We discuss the achievable signal-to-noise ratio (SNR) due to both additive white noise and multiplicative noise, and

Molecular spectroscopy with frequency combs

March 1, 2010
Author(s)
Ian R. Coddington
Pulsed femtosecond frequency combs are rapidly developing as a powerful spectroscopic tool. As a spectroscopic source stabilized frequency combs potentially offer broad spectral coverage, near perfect frequency accuracy, low timing jitter and broadband

Infrared time domain spectroscopy with synchronized frequency combs

January 29, 2010
Author(s)
Nathan R. Newbury, Ian R. Coddington, William C. Swann
We describe a frequency-comb based system for time-domain spectroscopy in the near infrared. Our configuration implements synchronous, repetitive sampling of the time domain signature for real-time coherent signal averaging and improved signal-to-noise

Coherent linear optical sampling at over 15 bits of resolution

July 15, 2009
Author(s)
Ian R. Coddington, William C. Swann, Nathan R. Newbury
Linear optical sampling characterizes a sample by measuring the distortions on a transmitted optical field, thereby quantifying the sample's optical response. By exploiting the high mutual coherence between two phase-locked femtosecond fiber lasers, we

Using the nonlinear Schroedinger equation for precision optical measurements

July 6, 2009
Author(s)
Nathan R. Newbury, Esther Baumann, Ian R. Coddington, Fabrizio R. Giorgetta, William C. Swann
Frequency combs produce light that is both broadband and highly coherent. However, their operation relies on the nonlinear Schroedinger equation, in particular to achieve the broad spectral output. Because it is a highly nonlinear system, this comb output

Precision ranging LIDAR using femtosecond fiber lasers

June 17, 2009
Author(s)
Nathan R. Newbury, Ian R. Coddington, William C. Swann
We discuss a coherent laser radar that uses two coherent femtosecond fiber lasers to perform absolute ranging at long distance. One coherent femtosecond fiber lasers acts as a source and the other as a local oscillator for heterodyne detection of the

Rapid and precise absolute distance measurements at long range

June 1, 2009
Author(s)
Ian R. Coddington, William C. Swann, Ljerka Nenadovic, Nathan R. Newbury
The ability to determine absolute distance to an object is one of the most basic measurements of remote sensing. High precision ranging has important applications in both large-scale manufacturing and in future tight formation-flying satellite missions

Time and Frequency-Domain Spectroscopy with Dual Frequency Combs

May 28, 2009
Author(s)
Nathan R. Newbury, Ian R. Coddington, William C. Swann
High-resolution spectroscopic measurements of the amplitude and phase spectra from a gas sample can be acquired by use of dual frequency combs. Here we discuss the corresponding gas signature in the time domain.

Absolute Ranging Using Frequency Combs

May 25, 2009
Author(s)
William C. Swann, Ian R. Coddington, Nathan R. Newbury
We present a technique for measuring absolute range that uses two mismatched frequency combs to measure distance over 1.5 m range with 10 nm level statistical uncertainty.