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Optical Engineering

Experimental demonstration of fiber differential spectral technique for monitoring small fluctuations in ultrashort laser pulses
Author(s): Fozia Aziz; Rama Chari; Shrikant M. Oak
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Paper Abstract

Propagation along an optical fiber modifies the spectrum of an ultrashort laser pulse due to interaction of the pulse with the fiber nonlinearity. These spectral modifications can be correlated with the input pulse parameters like the pulse power, pulse width, chirp, and pulse shape. We have shown earlier by numerical calculation that a small change in any of the pulse parameters is magnified in the fiber-modified spectrum due to the nonlinear nature of the interaction. We had proposed a differential spectrum monitoring technique for detecting such small changes. We now show experimentally that this technique can provide a sensitive and practical method for monitoring small changes in ultrashort pulses. Thus it can serve as a practical on-line monitor for laser stability during experiments with ultrashort pulses.

Paper Details

Date Published: 1 July 2007
PDF: 6 pages
Opt. Eng. 46(7) 073601 doi: 10.1117/1.2759231
Published in: Optical Engineering Volume 46, Issue 7
Show Author Affiliations
Fozia Aziz, Ctr. for Advanced Technology (India)
Rama Chari, Ctr. for Advanced Technology (India)
Shrikant M. Oak, Raja Ramanna Ctr. for Advanced Technology (India)

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