Abstract: A compact tunable 10 W picosecond source based on
Yb-doped fiber amplification of gain switch laser diode has been
demonstrated. A gain switch semiconductor laser diode was used as
the seed source, and a multi-stage single mode Yb-doped fiber
preamplifier was combined with two large mode area double-clad
Yb-doped fiber main amplifiers to construct the amplification system.
The tunable pulses with high stability and excellent beam quality
(M2
Abstract: The anomalous generation of plasma blocks by
interaction of petawatt-picosecond laser pulses permits side-on
ignition of uncompressed solid fusion fuel following an improved
application of the hydrodynamic Chu-model for deuterium-tritium.
The new possibility of side-on laser ignition depends on accelerated
ions and produced ions beams of high energy particles by the
nonlinear ponderomotive force of the laser pulse in the plasma block,
a re-evaluation of the early hydrodynamic analysis for ignition of
inertial fusion by including inhibition factor, collective effect of
stopping power of alpha particles and the energy loss rate
reabsorption to plasma by the protons of plasma blocks being
reduced by about a factor 40.