  We consider a Gaussian Beam (GB) resonant system for high frequency
gravitational waves (HFGWs) detection. At present, we find the optimal signal
strength in theory through setting the magnetic component of GB in a standard
gaussian form. Under the synchro-resonance condition, we study the signal
strength (i.e., transverse perturbative photon fluxes) from the relic HFGWs
(predicted by ordinary inflationary model) and the braneworld HFGWs (from
braneworld scenarios). Both of them would generate potentially detectable
transverse perturbative photon fluxes (PPFs). Furthermore we find optimal
system parameters and the relationship between frequency and effective width of
energy fluxes accumulation.
