Patent ID: 7106498

Claim:
A cascaded nonlinear sum frequency generation of tunable wave-length femtosecomd non-collinear optical parametric amplifier (OPA), comprising: a frequency doubling device for generating an excited light source for the optical parametric amplifier(OPA), the incident light is transmitted to a doubling BBO crystal to be the double frequency of blue light; a low frequency seeder generating apparatus, the incident light is transmitted to a CaF 2 window to generate a seeder; a rotating table, for allowing a non-collinear optical parametric amplifier crystal to rotate around the axis of the crystal; a plurality of lens, silver lens and reflectors, to direct the light to a non-collinear optical parametric amplifier crystal; a crystal, for generating tunable wave-length of non-collinear optical parametric amplifier, the axis of the crystal may rotate around the rotating axis such that the wave-length of the cascaded sum frequency generation (SFG) can be tuned.