2-PHOTON ABSORPTION-MEASUREMENTS IN PDA(12, 8) WAVE-GUIDES

Authors
KANEKO A ITO A FURUKAWA O WADA T SASABE H SASAKI K
Citation
A. Kaneko et al., 2-PHOTON ABSORPTION-MEASUREMENTS IN PDA(12, 8) WAVE-GUIDES, IEICE transactions on electronics, E77C(5), 1994, pp. 700-703
Citations number
NO
Categorie Soggetti
Engineering, Eletrical & Electronic
Journal title
IEICE transactions on electronics → ACNP
ISSN journal
09168524
Volume
E77C
Issue
5
Year of publication
1994
Pages
700 - 703
Database
ISI
SICI code
0916-8524(1994)E77C:5<700:2AIP8W>2.0.ZU;2-F
Abstract
We report the dispersion of two-photon absorption (TPA) coefficient, ( beta), in polydiacetylene (12,8) thin film waveguides in the wavelengt h range less than the one-photon band-gap with a 100 femtosecond mode- locked Ti: Sapphire laser pulses. The TPA coefficient was found to be 4 cm/GW for TE polarization at 900 nm (1.38 eV) by taking into account a Gaussian intensity distribution as well as a temporal pulse shape. We observed a sharp resonance in beta above the first one-photon allow ed transition with a full width at half maximum (FWHM of approximately 90 meV.