Ju Jung Jin, Kim Jongbae, Do Jung Yun, Kim Min-su, Park Seung Koo, Park Suntak, Lee Myung-Hyun
Wideband Photonics Device Team, Electronics and Telecommunications Research Institute, Daejeon 305-350, Korea.
Opt Lett. 2004 Jan 1;29(1):89-91. doi: 10.1364/ol.29.000089.
We demonstrate quasi-phase-matched (QPM) second-harmonic generation (SHG) at the optical communication wavelengths with side-chain polymer waveguides. A ridge waveguide structure is designed to support fundamental mode guiding at both the pump and the second harmonics, leading to a high field overlap integral of the guided modes. The nonlinearity contrast in the +/0 type QPM waveguide is maximized under a QPM poling electrode width of nearly half the coherence length. Using these configurations, we record a normalized SHG efficiency of 2.2% W(-1) cm(-2) in the polymer waveguide.
我们展示了利用侧链聚合物波导在光通信波长下实现的准相位匹配（QPM）二次谐波产生（SHG）。设计了一种脊形波导结构，以在泵浦光和二次谐波处都支持基模导波，从而实现导模的高场重叠积分。在QPM极化电极宽度接近相干长度的一半时，+/0型QPM波导中的非线性对比度达到最大。利用这些配置，我们在聚合物波导中记录到归一化的SHG效率为2.2%W⁻¹cm⁻²。
