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Coherence properties of two fiber lasers coupled by mutual injection

Sandrine Auroux1, Vincent Kermène, Agnès Desfarges-Berthelemot

  • 1XLIM, UMR CNRS 6172, 123 Avenue A. Thomas, 87060 Limoges Cedex, France. Sandrine.auroux@xlim.fr

Optics Express
|November 13, 2009
PubMed

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Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

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Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...