Asobe Masaki, Punhavan Saroeun, Kato Masato, Umeki Takeshi, Enbutsu Koji, Kazama Takushi, Kasahara Ryoichi
Opt Express. 2021 Jul 19;29(15):22900-22906. doi: 10.1364/OE.428868.
A configuration for wavelength conversion and optical amplification by parametric interaction using a nonlinear optical device is proposed. It enables pump generation through second harmonic generation (SHG), difference frequency generation (DFG), and optical parametric amplification (OPA) using a multiple-quasi-phase-matched (M-QPM) LiNbO waveguide in a bidirectional manner. Wavelength conversion for the 1.4-1.6 µm band is experimentally demonstrated. In addition, it is demonstrated that the parametric gain band can be changed using various detunings between the pump and QPM wavelengths used for the DFG/OPA process. The proposed method would be useful for enabling high-capacity optical transmission outside the 1550-nm band.
提出了一种利用非线性光学器件通过参量相互作用进行波长转换和光放大的配置。它能够通过使用多准相位匹配（M-QPM）铌酸锂波导以双向方式通过二次谐波产生（SHG）、差频产生（DFG）和光参量放大（OPA）来产生泵浦光。实验证明了1.4 - 1.6μm波段的波长转换。此外，还证明了可以通过用于DFG/OPA过程的泵浦光和QPM波长之间的各种失谐来改变参量增益带。所提出的方法对于实现1550nm波段以外的高容量光传输将是有用的。
