An off-axis, single-pass, radial-group-delay compensator design using an Offner triplet for a broadband OPCPA laser

An off-axis, single-pass, radial-group-delay compensator was designed using an Offner triplet and two negative lenses for a broadband (810∼1010-nm) optical parametric amplifier laser. It reduces radial group delay from 270 fs to 0.7 fs.