Real-time spectroscopy with subgigahertz resolution using amplified dispersive Fourier transformation

@article{Chou2008RealtimeSW,
  title={Real-time spectroscopy with subgigahertz resolution using amplified dispersive Fourier transformation},
  author={Jason T Chou and Daniel Solli and Bahram Jalali},
  journal={Applied Physics Letters},
  year={2008},
  volume={92},
  pages={111102}
}
Dispersive Fourier transformation is a powerful technique in which spectral information is mapped into the time domain using chromatic dispersion. It replaces a spectrometer with an electronic digitizer and enables real-time spectroscopy. The fundamental problem in this technique is the trade-off between the detection sensitivity and spectral resolution, a limitation set by the digitizer’s bandwidth. This predicament is caused by the power loss associated with optical dispersion. We overcome… 

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References

SHOWING 1-10 OF 14 REFERENCES

Amplified wavelength–time transformation for real-time spectroscopy

Real-time spectroscopy provides invaluable information about the evolution of dynamical processes, especially non-repetitive phenomena. Unfortunately, the continuous acquisition of rapidly varying

High bandwidth absorption spectroscopy with a dispersed supercontinuum source.

An optical gas sensor is presented, making use of a dispersed supercontinuum source, capable of acquiring broad bandwidth spectra at ultrahigh wavelength sweep and repetition rates, and the effect of this averaging on observed precision is investigated.

Wavelength-agile fiber laser using group-velocity dispersion of pulsed super-continua and application to broadband absorption spectroscopy

Abstract.A swept-wavelength source is created by connecting four elements in series: a femtosecond fiber laser at 1.56 μm, a non-linear fiber, a dispersive fiber and a tunable spectral bandpass

Time-domain optical sensing

A chirped optical supercontinuum is used to map absorption spectra into temporal waveforms. Time-domain spectral measurement of acetylene is demonstrated using a modelocked fibre laser as the source

Time magnification of electrical signals using chirped optical pulses

The authors report a method for stretching electrical signals in time. A high chirp rate is imposed on the electrical signal by mixing it with a dispersed ultra-short optical pulse in an

Time-wavelength spectroscopy for chemical sensing

Time-wavelength spectroscopy, using a linearly chirped broad-band pulse, eliminates the need for an optical spectrometer and enables real-time analysis. Utilizing digital filtering and matched

Raman amplifiers for telecommunications

Raman amplifiers are being deployed in almost every new long-haul and ultralong-haul fiber-optic transmission systems, making them one of the first widely commercialized nonlinear optical devices in

Oversampled filter banks

The relations of non-subsampled filter banks to continuous-time filtering are investigated and the design flexibility is illustrated by giving a procedure for designing maximally flat two-channel filter banks that yield highly regular wavelets with a given number of vanishing moments.

Classical Electrodynamics

Electrodynamics of Particles and PlasmasBy P. C. Clemmow and J. P. Dougherty. (Addison-Wesley Series in Advanced Physics.) Pp. ix + 457. (Addison-Wesley London, September 1969.) 163s.