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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 10, Iss. 5 — Mar. 11, 2002
  • pp: 262–267

Real-time intuitive spectrogram measurement of ultrashort optical pulses using two-photon absorption in a semiconductor

Kensuke Ogawa  »View Author Affiliations


Optics Express, Vol. 10, Issue 5, pp. 262-267 (2002)
http://dx.doi.org/10.1364/OE.10.000262


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Abstract

Real-time acquisition of intuitive spectrograms based on two-photon absorption frequency-resolved optical gating is demonstrated in a wavelength range around 1500 nm using an InP crystal for a two-photon absorption medium. Rapid wavelength-delay scanning, based on a counter-rotating spectrometer mirror synchronized with a delay stage, is introduced and incorporated with lock-in detection for the real-time spectrogram acquisition. It is shown that the frequency marginal and average delay time of acquired spectrograms provide the spectral intensity and group delay time of optical pulses under test. This allows the direct and rapid measurement of the magnitude and phase of ultrashort optical pulses in the spectral domain without using pulse retrieval algorithms to reconstruct the pulse shapes.

© 2002 Optical Society of America

OCIS Codes
(190.4180) Nonlinear optics : Multiphoton processes
(320.7100) Ultrafast optics : Ultrafast measurements
(320.7150) Ultrafast optics : Ultrafast spectroscopy

ToC Category:
Research Papers

History
Original Manuscript: February 13, 2002
Revised Manuscript: March 5, 2002
Published: March 11, 2002

Citation
Kensuke Ogawa, "Real-time intuitive spectrogram measurement of ultrashort optical pulses using two-photon absorption in a semiconductor," Opt. Express 10, 262-267 (2002)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-10-5-262


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References

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