A cross-ring (CR-) Mach-Zehnder interferometer (MZI) interleaver structure has been proposed and fabricated. It uses an '8' shaped cross-ring resonator to replace the conventional circular ring resonator. Thus, the new structure can have the function of add-signal. Furthermore, a thermo-optical fine tuning has been applied, which improves the crosstalk performance from approximately -10 dB to approximately -20 dB with 9 V applied on the heater of the 3-dB directional coupler.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/oe.16.021476 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Analysis of Synthetic Monodisperse Polysaccharides by Wide Mass Range Ultrahigh-Resolution MALDI Mass Spectrometry.
Anal Chem
March 2021
Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden 2333 ZA, The Netherlands.
Article Synopsis
- Carbohydrates like oligosaccharides and polysaccharides are important biopolymers involved in various biological processes and often studied after being isolated from natural sources.
- Pure compounds with well-defined structures, obtained via chemical or enzymatic synthesis, are necessary for accurate analysis, and new synthetic techniques have made it easier to access larger polysaccharides.
- The study uses advanced MALDI FT-ICR mass spectrometry to analyze synthetic carbohydrates of different sizes, revealing details about their monosaccharide content and linkage types through the identification of fragment ions, enhancing our understanding of their composition and structures.
Unexpected Dissociation Mechanism of Sodiated N-Acetylglucosamine and N-Acetylgalactosamine.
J Phys Chem A
April 2019
Institute of Atomic and Molecular Sciences, Academia Sinica , P.O. Box 23-166, Taipei 10617 , Taiwan.
The mechanism for the collision-induced dissociation (CID) of two sodiated N-acetylhexosamines (HexNAc), N-acetylglucosamine (GlcNAc), and N-acetylgalactosamine (GalNAc), was studied using quantum-chemistry calculations and resonance excitation in a low-pressure linear ion trap. Experimental results show that the major dissociation channel of the isotope labeled [1-O, D]-HexNAc is the dehydration by eliminating HDO, where OD comes from the OD group at C3. Dissociation channels of minor importance include the A cross-ring dissociation.
View Article and Find Full Text PDFCollision-induced dissociation of sodiated glucose, galactose, and mannose, and the identification of anomeric configurations.
Phys Chem Chem Phys
July 2018
Institute of Atomic and Molecular Sciences, Academia Sinica, P. O. Box 23-166, Taipei 10617, Taiwan.
Collision-induced dissociation of sodiated α-glucose, β-glucose, α-galactose, β-galactose, α-mannose, and β-mannose was studied using electronic structure calculations and resonance excitation in a low-pressure linear ion trap. We made an extensive search of conformers and transition states in calculations to ensure the transition state with the lowest barrier height for each dissociation channel could be located. The major dissociation channels, in addition to desodiation, are cross-ring dissociation and dehydration.
View Article and Find Full Text PDFStructural elucidation of fucosylated chondroitin sulfates from sea cucumber using FTICR-MS/MS.
Eur J Mass Spectrom (Chichester)
February 2018
1 Department of Chemistry, University of Georgia, Athens, USA.
Fucosylated chondroitin sulfates are complex polysaccharides extracted from sea cucumber. They have been extensively studied for their anticoagulant properties and have been implicated in other biological activities. While nuclear magnetic resonance spectroscopy has been used to extensively characterize fucosylated chondroitin sulfate oligomers, we herein report the first detailed mass characterization of fucosylated chondroitin sulfate using high-resolution Fourier transform ion cyclotron resonance mass spectrometry.
View Article and Find Full Text PDFStructural investigation by tandem mass spectrometry analysis of a heterogeneous mixture of Lipid A isolated from the lipopolysaccharide of Aeromonas hydrophila SJ-55Ra.
Rapid Commun Mass Spectrom
February 2018
Chemistry Department, Memorial University of Newfoundland, St. John's, Canada.
Rationale: We report herein the electrospray ionization mass spectrometry (ESI-MS) negative ion mode and low-energy collision-induced dissociation tandem mass spectrometry (CID-MS/MS) analysis of a mixture of lipid A isolated from the lipopolysaccharide (LPS) of a rough-resistant wild strain of the Gram-negative bacteria Aeromonas hydrophila grown in the presence of phages (SJ-55Ra). This investigation indicates that the presence of a mixture of lipid A acylated disaccharides, whose molecular structures were not relatively conserved, resulted from the incomplete LPS biosynthesis caused by the phage treatment.
Methods: The heterogeneous lipid A mixture from the LPS-SJ55Ra was obtained following growth of the Gram-negative bacteria Aeromonas hydrophila (SJ-55R) in the presence of phages and isolation by the aqueous phenol method.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!