For Full-Text PDF, please login, if you are a member of IEICE,|
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
Two-Photon Absorption Measurements in PDA (12, 8) Waveguides
Akimasa KANEKO Akira ITO Osamu FURUKAWA Tatsuo WADA Hiroyuki SASABE Keisuke SASAKI
IEICE TRANSACTIONS on Electronics
Publication Date: 1994/05/25
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Organic Functional Devices)
two-photon absorption, polydiacetylene (12,8), mode-locked Ti: Sapphire laser, slab waveguide,
Full Text: PDF>>
We report the dispersion of two-photon absorption (TPA) coefficient, (β), in polydiacetylene (12, 8) thin film waveguides in the wavelength 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 β above the first one-photon allowed transition with a full width at half maximum (FWHM) of 90 meV.