Two-dimensional Z-scan method for the measurement of optical nonlinear effects

Peilin Chen; Ivan V. Tomov; Peter M. Rentzepis; Masato Nakashima; Joseph F. Roach

doi:10.1117/12.279302

10 October 1997 Two-dimensional Z-scan method for the measurement of optical nonlinear effects

Peilin Chen, Ivan V. Tomov, Peter M. Rentzepis, Masato Nakashima, Joseph F. Roach

Proceedings Volume 3146, Nonlinear Optical Liquids and Power Limiters; (1997) https://doi.org/10.1117/12.279302
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

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.

Citation Download Citation

Peilin Chen, Ivan V. Tomov, Peter M. Rentzepis, Masato Nakashima, and 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); https://doi.org/10.1117/12.279302

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