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Polarization independent sum frequency generation (SFG) is proposed in an electro-optic (EO) tunable periodically poled Lithium Niobate (PPLN). The PPLN consists of four sections. External electric field could be selectively applied to them to induce polarization rotation between the ordinary and extraordinary waves. If the domain structure is well designed, the signal wave with an arbitrary polarization...
Periodically poled Lithium Niobate (PPLN) is a promising material for wavelength conversion and switching in an all-optical network. However, current PPLN based network elements are normally polarization sensitive, which is not convenient for telecom applications. We proposed a polarization insensitive frequency conversion approach in a PPLN. The second harmonic generation (SHG) studied as an example...
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