Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2992064
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Funding
- Defense Advanced Research Projects Agency (DARPA)
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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 and detector array with a dispersive fiber and single photodetector. This simplifies the system and, more importantly, enables fast real-time measurements. Here we describe a novel ultrafast barcode reader and displacement sensor that employs internally amplified dispersive Fourier transformation. This technique amplifies and simultaneously maps the spectrally encoded barcode into a temporal waveform. It achieves a record acquisition speed of 25 MHz-four orders of magnitude faster than the current state of the art. (C) 2008 American Institute of Physics.
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