(E)-N′-[1-(4-Chloro­phen­yl)ethyl­idene]-2-hydroxy­benzohydrazide

In the title compound, C15H13ClN2O2, the dihedral angle between the two benzene rings is 7.0 (1)°. An intra­molecular N—H⋯O hydrogen bond is present and inter­molecular O—H⋯O hydrogen bonds link the mol­ecules into chains along [001]

Bis(2-amino-3H-benzothia­zolium) bis­(7-oxabicyclo­[2.2.1]heptane-2,3-dicarboxyl­ato)cobaltate(II) hexa­hydrate

In the crystal structure of the title salt, (C7H7N2S)2[Co(C8H8O5)2]·6H2O, the heterocyclic N atom of the 2-amino­benzothia­zole mol­ecule is protonated. The CoII atom is situated on an inversion centre and exhibits a slightly distorted octa­hedral CoO6 coordination defined by the bridging O atoms of the bicyclo­heptane unit and four carboxyl­ate O atoms of two symmetry-related and fully deprotonated ligands. The crystal packing is stabilized by N—H⋯O hydrogen bonds between the cations and anions and by O—H⋯O hydrogen bonds including the crystal water mol­ecules

Poly[[(2,2′-bipyridine)(μ 3-7-oxabicyclo­[2.2.1]heptane-2,3-dicarboxyl­ato)cadmium] monohydrate]

The title compound, {[Cd(C8H8O5)(C10H8N2)]·H2O}n, was obtained by the reaction of cadmium acetate with 2,2′-bi­pyridine and 7-oxabicyclo­(2.2.1)heptane-2,3-dicarb­oxy­lic anhydride. The CdII atom is seven-coordinated in a distorted penta­gonal–bipyramidal configuration, defined by five O atoms from the carboxyl­ate groups of three 7-oxabicyclo­[2.2.1]heptane-2,3-dicarboxyl­ato ligands and two N atoms from the 2,2′-bipyridine ligand. Two O atoms link two CdII atoms, forming a dinuclear center: the Cd—O—Cd bridging angle is 110.19 (6)°. The polymeric structure extends along [100] and is linked by inter­molecular O—H⋯O hydrogen bonds involving the solvent water molecule. Extensive π–π stacking exists between 2,2-bypiridine ligands along [010] with centroid-centroid distance of 3.650 (2) 

5,6,7-Trichloro-2-meth­oxy-8-hy­droxy­quinoline

In the title compound, C10H6Cl3NO2, a mean plane fitted through all non-H atoms has an r.m.s. deviation of 0.035 Å. In the crystal, adjacent mol­ecules are connected by O—H⋯O hydrogen bonds and π–π stacking inter­actions [centroid–centroid distance = 3.650 (1) Å], resulting in an infinite chain which propagates in the b-axis direction

Over 300-km Transmission of 25 Gb/s Optical SSB NPAM-4 Signal with Electronic Dispersion Pre-compensation and Interference Mitigation

We experimentally demonstrate the interference mitigation in direct-detection of optical SSB signals with Nyquist-PAM-4. At 25 Gb/s, we achieve over 300-km and 500-km SSMF with an average BER of 2.7×10-3 (<HD-FEC) and 9.4×10-3 (<SD-FEC), respectively

Multilevel Amplitude Regeneration of PAM-4 Signals using a Nonlinear Optical Loop Mirror

Multilevel amplitude regeneration of return-to-zero PAM-4 signals is experimentally demonstrated using a single NOLM unit. The noise suppression capability at each amplitude level is characterized, and Q2-factor improvement of 0.92dB is achieved by optimizing input signal power and distortion strengt

Reducing Crosstalk of Silicon-based Optical Switch with All-optical Multi-wavelength Regenerator

Improving crosstalk performance of Mach–Zehnder-interferometer-type optical switches is experimentally investigated by use of an all-optical multi-wavelength regenerator. Extinction ratio and bit error rate of WDM signals are simultaneously improved in proposed regenerative optical switching

All-optical multilevel regeneration in nonlinear optical loop mirror

An all-optical multilevel amplitude regenerator is optimized based on the transmission response of a nonlinear optical loop mirror (NOLM). Three regenerative regions defined by the power-transfer-function (PTF) slope of less than 1 are obtained, and noise suppression is shown for a PAM4 signal. Using amplitude dithering we were able to experimentally characterize the transfer function slope and confirm the theoretical predictions