Quasi-phase-matched frequency doubling over 5 mm in periodically poled polymer waveguide

Quasi-phase-matched second harmonic generation from 1340 to 670 nm with a quasi-phase-matching length of 5 mm is demonstrated in a periodically poled polymer waveguide containing a nonlinear optical polymer. Angle, wavelength and temperature tuning are used to obtain independent measures of the quasi-phase-matching length, and those factors limiting the quasi-phase-matching length are indicated.