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Optics Letters

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  • Vol. 21, Iss. 3 — Feb. 1, 1996
  • pp: 225–227

Frequency-modulation spectroscopy with transform-limited nanosecond laser pulses

E. E. Eyler, S. Gangopadhyay, N. Melikechi, J. C. Bloch, and R. W. Field  »View Author Affiliations


Optics Letters, Vol. 21, Issue 3, pp. 225-227 (1996)
http://dx.doi.org/10.1364/OL.21.000225


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Abstract

We demonstrate high-quality FM spectra with nanosecond laser pulses. Transform-limited pulses with FM sidebands are produced by pulsed amplification of a phase-modulated cw laser. The pulses can be shifted to the UV by nonlinear mixing. We report both initial experiments on I2 and what is to our knowledge the first observation of a far-UV transition by FM spectroscopy, at 214.5 nm. Major advantages of this method include (1) spectral resolution of the order of 0.001 cm−1, (2) better-defined optical phase, and (3) a much smaller and more easily detected modulation frequency, ~500 MHz. The absorption sensitivity is ~10−4, and considerable further improvement is expected.

© 1996 Optical Society of America

History
Original Manuscript: August 25, 1995
Published: February 1, 1996

Citation
E. E. Eyler, J. C. Bloch, R. W. Field, S. Gangopadhyay, and N. Melikechi, "Frequency-modulation spectroscopy with transform-limited nanosecond laser pulses," Opt. Lett. 21, 225-227 (1996)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-21-3-225


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