Stretcher

• The two beams from the oscillator are sent to a dual-wavelength pulse stretcher.
• As seen, the beams have different incident angles, so they copropagate from the grating to the spherical mirror.
• The 1200-line/mm grating is 500cm and the 15.25cm-diameter focusing mirror has a one meter focal length.
• The pulses are stretched to approximately 200ps.