11 research outputs found
Ultrafast all-optical demultiplexer based on monolithic Mach-Zehnder interferometer with integrated semiconductor optical amplifiers
A monolithically integrated and fully packaged Mach-Zehnder interferometer with semiconductor optical amplifiers (MZI-SOA) is demonstrated as polarisation-independent high-speed demultiplexer for up to 160 Gbit/s optical time division multiplexed (OTDM) data stream
A monoclinic polymorph of N-ethoxycarbonyl-N′-(3-phenyl-1H-1,2,4-triazol-5-yl)thiourea
The title compound, C12H13N5O2S {systematic name: ethyl N-[N-(3-phenyl-1H-1,2,4-triazol-5-yl)carbamothioyl]carbamate}, is a monoclinic polymorph (space group P21/c) which crystallizes with three similar independent molecules in the asymmetric unit. The triazole ring makes dihedral angles of 6.6 (2), 8.4 (2) and 10.6 (2)° with the phenyl ring in the three independent molecules. The structure was previously reported [Dolzhenko et al. (2010a
▶). Acta Cryst., E46, o425] as a triclinic polymorph crystallizing in space group P
. Molecules in both polymorphs possess two S(6) rings generated by intramolecular N—H⋯S and N—H⋯O hydrogen bonds, resulting in similar molecular geometries. However, the two polymorphs differ in the crystal packing. In contrast to the dimers of the triclinic polymorph, molecules of the monoclinic polymorph are connected by intermolecular N—H⋯S and N—H⋯N hydrogen bonds, forming pseudosymmetric trimers arranged in sheets parallel to (302)