Nonlinear optical properties of organic and polymeric materials
29 Sep 1983-
About: The article was published on 1983-09-29 and is currently open access. It has received 762 citations till now.
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TL;DR: For the compounds in this study, which contained a p-nitrophenyl group as electron acceptor, the p-dimethylaminophenyl group was the most powerful electron-donating group, leading to the highest maximum absorption wavelengths, as well as to the maximum SHG efficiency.
10 citations
TL;DR: In this article, an ultrafast laser was demonstrated in all-fiber based cavity by using metal-organic material (Alq3) as saturable absorber (SA).
10 citations
TL;DR: In this paper, single crystals of L-serine phosphate (LSP) were grown by slow evaporation technique and the optical studies revealed the transparency of the crystal in the entire visible region.
Abstract: Single crystals of L-serine phosphate (LSP) were grown by slow evaporation technique. The optical studies reveal the transparency of the crystal in the entire visible region. Grown crystal was subjected to single crystal XRD diffraction technique. Thermal studies of LSP confirm the thermal stability of the crystal and it is stable up to 210°C. The functional groups and optical behaviour of the crystal were identified from FT-IR and UV-Vis analysis. The crystals were also characterized by microhardness and photoconductivity to determine the mechanical strength and the optical conductivity. Laser damage threshold and nonlinear optical activity of the grown crystal were confirmed by Q-switched Nd : YAG laser beam.
10 citations
Cites background from "Nonlinear optical properties of org..."
...Inorganic crystals have high mechanical and thermal stability than that of organic crystals [5, 6]....
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01 May 1990
TL;DR: In this paper, a strip-loaded poly(4-BCMU) waveguide with 1 cm interaction length was used to estimate the optical power for directional coupler operation, assuming no index saturation effects, negligible one or two photon absorption, waveguide propagation losses less than 1 dB/cm, and unity coupling efficiency.
Abstract: Strip-loading is a convenient and effective method to design and fabricate channel waveguides in multilayer active polymer
structures. Several micron wide strip-loaded poly(4-BCMU) waveguides are observed to be single mode at 1.06 im and
1.32 rim.
Based on the optical nonlinearity for poly(4-BCMU) measured by THG at 1.32 pm, an intensity of 650 MW/cm2 is
required to satisfy the optical phase shift material figure of merit, 4ir, for a directional coupler with 1 cm interaction
length. To estimate the optical power for directional coupler operation, we initially assume no index saturation effects,
negligible one or two photon absorption, waveguide propagation losses less than 1 dB/cm, and unity coupling efficiency.
40 W is the lowest estimated peak pulse power of operation for a device with 6 .tm2 area waveguides. Actual coupling
efficiencies of light incident on our 6 pj2 ea waveguides are between 30 % and 40 %. The propagation losses for our
sixip-Ioaded waveguides are between 4 dB/cm (i'M) and 9dB/cm (TE). The guided wave intensities are at least ten fold
lower than the input intensities. Incident peak pulse powers of at least several hundred watts will be required for 1 cm
long (lirectional coupler device operation. Initial interferometry results suggest that average power dependent thermal
phase shifts dominate peak power dependent electronic phase shifts at duty cycles approaching unity. Polymer
superlattices are considered as advanced nonlinear optical materials.
10 citations
TL;DR: In this article, the SHG efficiencies of optically active amino acids, their monomeric derivatives, linear and cyclic dipeptides, tripeptide, and polypeptided carrying polarizable groups were tested.
Abstract: The SHG efficiencies of optically active amino acids, their monomeric derivatives, linear and cyclic dipeptides, tripeptides, and polypeptides carrying polarizable groups were tested. Among the 91 samples, L-valine-p-nitroanilide (Val-NA) showed the largest SHG [9.2 × I2w(urea)]. Val-NA was found to be phase-matchable and transparent down to 420 nm. Monopeptide and dipeptide derivatives of p-nitrophenylalanine also showed large SHG and were transparent down to 420 nm.
10 citations