Now showing items 11-20 of 43
Additive pulse mode-locking using a birefringent optical fiber
(Elsevier, 1994-01-15)
A powerful and increasingly common method to mode-lock a variety of lasers is additive pulse mode-locking (APM). In this technique, a nonlinear medium is placed in an external cavity which is coupled to the main laser ...
Nuclear-spin relaxation in paramagnetic solutions when the electronic zero-field splitting and zeeman interactions are of arbitrary magnitude
(Elsevier, 1992-12)
Expressions for the dipolar nuclear-spin relaxation rates in paramagnetic salt solutions have been derived under conditions where the electronic zero-field splitting (zfs) and Zeeman interactions are of arbitrary magnitude ...
Ultrafast gating using a nonlinear Sagnac interferometer
(Elsevier, 1992-03-15)
We show theoretically and experimentally that Sagnac interferometers which include a medium which exhibits gain or absorption can be used to obtain picosecond or femtosecond optical gates with very high contrast and good ...
Structure and morphology of magnetron sputtered CoCr thin films
(Elsevier, 1991-12-02)
The growth characteristics of magnetron sputtered Co-22%Cr thin films on amorphous glass or carbon substrates have been investigated utilizing transmission electron microscopy, X-ray diffraction and electrical resistivity ...
Mapping of spectral density functions using heteronuclear NMR relaxation measurements
(Elsevier, 1992-06-15)
A method is proposed for direct mapping of spectral density functions of the rotational motions of H-X bond vectors, such as 1H---15N, by measuring a set of NMR relaxation parameters. The well known and frequently measured ...
Transient Responses of a Heterogeneous Spin System to Binomial Pulse Saturation
(Elsevier, 1993-03)
The transient responses of a heterogeneous spin system to binomial pulses applied at the free-water resonance frequency are obtained by solving the Bloch equations pertaining to such a system modeled by a pair of binary ...
Geometrical optimization of longitudinally pumped solid-state lasers
(Elsevier, 1991-12-01)
We use a simplified analysis of gain saturation in longitudinally pumped lasers or amplifiers to study the effect of the relative pump and laser beam size. We derive a simple rule of thumb allowing one to optimize the efficiency.