Wavelength dependence of irreversible photobleaching of dye-doped polymer waveguide materials

Abstract

We report the irreversible bleaching characteristics of 4-(dicyanomethylene)-2-methyl-6-(p-dimethyl aminostyryl)-4H-pyran (DCM) doped into perfluorocyclobutene (PFCB) and a new material known as DH-6 doped into amorphous polycarbonate (APC) by a monochromatic bleaching source. The wavelength dependent rate constants for the irreversible bleaching process are found, and the experimental bleaching characteristics are compared to the theoretical bleaching characteristics determined from a kinetic model of the bleaching process.

Highly photo-stable, kHz-repetition-rate, diode pumped circulation-free liquid dye laser with thermal lens management

“…In addition of the 𝑆 0 → 𝑆 1 absorption peak of DCM in propanol-2 at 470 nm, a second absorption peak around 348 nm emerged in the degraded sample. This characteristic higher energy absorption band was reported earlier, 28,29 and was attributed either directly to the DCM cis-isomer or to a degradation photoproduct preferentially created from the cisisomer, whose formation from the most stable transisomer is a distinguishing photo-physical process occurring in stilbene dyes. 29,30 As a comparison, we used the same setup to pump a solid state sample: to this end, a 17-µm-thick layer of PMMA doped with DCM was directly coated on the plane mirror, 31,32 with ~ 83% absorption at the pump wavelength.…”

Science and technology of perfluorocyclobutyl aryl ether polymers

“…Other research groups as well as our own are currently studying PFCB aryl ether polymers for possible EO applications. [120][121][122][123][124][125][126][127][128][129] Our group is currently investigating PFCB aryl ether polymers functionalized with a series of triaryl amino-based chromophores that possess unprecedented hyperpolarizability values (20,000 3 10 À30 esu measured at 1.6 lm). [130][131][132] Liquid Crystalline Polymers Liquid crystalline (LC) polymers are used as displays in electro-optic devices and require interfacial ordering as well as thermal stability; fluoropolymers, in particular, are quite advanced in this respective area.…”