An all-optical picosecond switch in polydiacetylene

Abdeldayem, Hossin; Frazier, Donald O.; Paley, Mark S.
February 2003
Applied Physics Letters;2/17/2003, Vol. 82 Issue 7, p1120
Academic Journal
A polydiacetylene derivative of 2-methyl-4-nitroaniline (PDAMNA) showed a picosecond switching property. This phenomenon was demonstrated by waveguiding a cw He-Ne laser collinearly with a mode-locked picosecond Nd:YAG laser at 532 nm through a hollow fiber coated on the inside with a thin film of PDAMNA. The Z-scan investigations of PDAMNA thin films revealed that the PDAMNA system is a three-level system and the switching is caused by excited state absorption of the He-Ne beam.


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