Now showing items 11-20 of 82
Chirped pulse amplification in an erbium-doped fiber oscillator/ erbium-doped fiber amplifier system
(Elsevier, 1994-03-15)
Chirped pulse amplification in erbium fibers is demonstrated. A passively mode locked erbium-doped fiber laser source provides the seed pulses for an erbium-doped fiber amplifier. The system produces femtosecond pulses at ...
Redundancy modulation for coherent imaging systems
(Elsevier, 1973-01)
In order to image continuous-tone transparencies with coherent light, special types of diffuse speckle-free illumination are required to achieve high image quality. Several types of speckle-free modulation have been ...
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 ...
Multi-mode holographic waveguide coupler
(Elsevier, 1975-10)
A double-exposure thick-holographic-grating waveguide coupler is described in which two waveguide modes can be excited with a single incident beam. Single-grating decouplers are also designed to selectively remove one of ...
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 ...
Temperature dependence of ionization rates in AlxGa1-xAs
(Elsevier, 1971-07)
The ionization rates in AlxGa1-xAs have been measured in a temperature range from 77[deg]K to 373[deg]K for samples with various Al content. The results showed that the ionization rates decrease with both the Al content ...