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Proceedings Paper

Characterization of optical signals in fiber optic Fourier converter
Author(s): Levon Kh. Mouradian; Armen Zohrabian; Vache Ninoyan; Aghavni Kutuzian; Claude Froehly; Frederic Louradour; Alain Barthelemy
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Paper Abstract

We demonstrate a new technique for the direct real-time pico-femtosecond scale temporal measurements based on the nonlinear-optic process of Fourier transformation (NOFT): the conversion of the temporal information to the spectral. This performance is implemented in the fiber-optic spectral compressor, first stretching and up-chirping the pulses in dispersive delay, and after quenching the induced chirp by means of self- or cross-phase modulation in the single-mode fiber. The accurate quenching of the induced chirp brings to the spectral imaging of pulse temporal profile, reducing the problem of the high-resolution temporal measurements to the standard spectrometry. The problem of spectroscopy becomes complicated for ultrafast processes because of the low temporal resolution of electronic oscilloscopes, and often the complex techniques of phase measurements are developed. NOFT with a spectrometer can serve as an ultrafast optical oscilloscope: the resolution is limited only by the temporal response of the Kerr effect, which is approximately 5 fs for silica. In our pico- and femtosecond scale experiments, with the Nd:YAG and Ti:Sapphire lasers, we shaped the multi-peak pulses, implement the radiation spectral compression, and check the given shapes of pulses by means of the spectrometer in order to demonstrate the above mentioned `oscilloscopic' performance.

Paper Details

Date Published: 9 October 1998
PDF: 8 pages
Proc. SPIE 3418, Advances in Optical Beam Characterization and Measurements, (9 October 1998); doi: 10.1117/12.326641
Show Author Affiliations
Levon Kh. Mouradian, Yerevan State Univ. (Armenia)
Armen Zohrabian, Yerevan State Univ. (Armenia)
Vache Ninoyan, Yerevan State Univ. (Armenia)
Aghavni Kutuzian, Yerevan State Univ. (Armenia)
Claude Froehly, Univ. de Limoges (France)
Frederic Louradour, Univ. de Limoges (France)
Alain Barthelemy, Univ. de Limoges (France)

Published in SPIE Proceedings Vol. 3418:
Advances in Optical Beam Characterization and Measurements
Michel Piche, Editor(s)

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