  A theoretical study on thermonuclear fusion including deuterium-tritium (D-T)
fusion and D-$^{3}$He fusion in intense laser fields has been shown in this
article. With the laser fields expected to be available in the near future,
some quantitative results for the laser-induced modifications to the
cross-sections are given. It is reported that the cross-sections are more
sensitive to the external laser fields at the lower energies. An explicit
generalized form of the Gamow penetrability factor is given for the predictions
of the laser-induced effects for some other similar nuclear processes.
