10 October 1997 Two-dimensional Z-scan method for the measurement of optical nonlinear effects
Author Affiliations +
Abstract
Recently some phthalocynine derivatives have been reported to exhibit a strong optical limiting effect which is due to their large reverse saturable absorption. In this report we present another close family of phthalocynine, meso-substituted tetrabenzoporphyrins. We have employed both modified Z-scan techniques which uses a CCD camera as the detector and picosecond transient spectroscopy to study the optical power limiting mechanism of the meso-substituted tetrabenzoporphyrin derivatives. With the aid of a CCD detector, a two dimensional image of the beam, in the far field can be obtained directly in the Z-scan experiments. By integrating different parts of the image, both "closed aperture" and "open aperture" information can be calculated at the same time. In the kinetics measurements, several characteristic (ir,ir*), (,*) and (d, d) transitions have been observed, and the absorption cross sections and the relaxation rates of each transient has been measured.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peilin Chen, Ivan V. Tomov, Peter M. Rentzepis, Masato Nakashima, Joseph F. Roach, "Two-dimensional Z-scan method for the measurement of optical nonlinear effects", Proc. SPIE 3146, Nonlinear Optical Liquids and Power Limiters, (10 October 1997); doi: 10.1117/12.279302; https://doi.org/10.1117/12.279302
PROCEEDINGS
10 PAGES


SHARE
Back to Top