Two-photon absorption in 4-butoxycarbonylmethylurethane polydiacetylene waveguides

J. E. Ehrlich, J. D. Valera, A. Darzi, A. C. Walker

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The strong confinement of light in planar-optical waveguides has been used to measure the two-photon absorption coefficient, ß, in 4-butoxycarbonylmethylurethane polydiacetylene (4BCMU) thin films. Prisms were used to couple the 30-60 ps pulses (up to 10 µJ) from a mode-locked YAG laser (?=1.06 µm) into the thin-film waveguides. A simple analytical theory is compared with the experimental results to give a value of ß?4×10-3 cm/MW.

Original languageEnglish
Pages (from-to)2938-2940
Number of pages3
JournalApplied Physics Letters
Issue number23
Publication statusPublished - 1991


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