Second-harmonic generation in periodically poled nonlinear polymer waveguides.
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.
Ju
Jung Jin
JJ
Wideband Photonics Device Team, Electronics and Telecommunications Research Institute, Daejeon 305-350, Korea. jjju@etri.re.kr
Kim
Jongbae
J
Do
Jung Yun
JY
Kim
Min-su
MS
Park
Seung Koo
SK
Park
Suntak
S
Lee
Myung-Hyun
MH