We propose a new technique of tuning the phase-matching condition for guided-wave optical frequency converter, and analyze the basic performances theoretically. Quasi-phase matching (QPM) method is the basis of our proposed tunable device. The QPM grating is divided into some segments, and tuning is performed by selecting the optimum phase of each segment. We can adjust the phase of the segment by using the controllability of the optical nonlinearity of dye-doped polymers with poling electric field. This tuning technique is the first proposal in which the characteristic of dye-doped polymers is effectively utilized in guided-wave optical frequency conversion devices.
Takashi Sugihara, Hiroshi Haga, and Sadahiko Yamamoto, "Electrically Tunable Guided-Wave Optical Frequency Converter Using Dye-Doped Polymers," J. Lightwave Technol. 16, 239- (1998)