# 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…

## 60 Citations

Noise figure of amplified dispersive Fourier transformation

- Physics
- 2010

Amplified dispersive Fourier transformation (ADFT) is a powerful tool for fast real-time spectroscopy as it overcomes the limitations of traditional optical spectrometers. ADFT maps the spectrum of…

Real-time optical reflectometry enabled by amplified dispersive Fourier transformation

- Physics
- 2008

The axial scan rate of optical frequency-domain reflectometry and optical coherence tomography can be increased to megahertz frequencies by dispersive Fourier transformation. However, the fundamental…

Title Dispersive Fourier transform using few-mode fibers for real-timeand high-speed spectroscopy

- 2012

Dispersive Fourier Transform (DFT) is a powerful technique for real-time and high-speed spectroscopy. In DFT, the spectral information of an optical pulse is mapped into time using group velocity…

Amplified dispersive Fourier-transform imaging for ultrafast displacement sensing and barcode reading

- Physics
- 2008

Dispersive Fourier transformation is a powerful technique in which the spectrum of an optical pulse is mapped into a time-domain waveform using chromatic dispersion. It replaces a diffraction grating…

Time-Stretch Spectroscopy Based on Laser Cavity Tuning With a Dual-Function Delay Line

- Materials ScienceIEEE Photonics Technology Letters
- 2019

Time-stretch spectroscopy has established as a viable technique with high resolution and single-shot capability. However, it generally requires ultra-wideband photodetectors and electronics, and its…

Validating data analysis of broadband laser ranging.

- Materials Science, MedicineThe Review of scientific instruments
- 2018

This work describes in detail an analysis process for interpreting ranging data when standard telecommunications fiber is used to perform an imperfect dispersive Fourier transform.

Dispersive Fourier Transformation for Versatile Microwave Photonics Applications

- Materials Science
- 2014

Dispersive Fourier transformation (DFT) maps the broadband spectrum of an ultrashort optical pulse into a time stretched waveform with its intensity profile mirroring the spectrum using chromatic…

Time-wavelength optical sampling spectroscopy based on dynamic laser cavity tuning

- Materials Science
- 2018

Time-wavelength optical sampling (TWOS) is proposed here as a scheme that leverages the advantages of both wavelength-time mapping and ultrafast optical sampling to achieve real-time spectral…

Real-Time Femtosecond Ranging Lidar Based on All-Optical Signal Processing

- Engineering, Physics
- 2020

A real-time ranging lidar with 0.1 Mega Hertz update rate and few-micrometer resolution incorporating dispersive Fourier transformation and instantaneous microwave frequency measurement is proposed…

Accuracy and precision in broadband laser ranging

- Physics, EngineeringLASE
- 2018

Broadband laser ranging uses spectral interferometry and a dispersive Fourier transform to perform high repetition rate position measurements of explosively-driven surfaces typically moving at…

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