PPLN-Based Optical Parametric Amplification for Wideband WDM Transmission

The optical parametric amplifier (OPA) has attractive features for communications, such as a wideband, high gain, and fast transient response. In addition, by using idler light, which is phase-conjugated light generated in the amplification process, various kinds of signal processing, fiber-nonlinearity mitigation, wavelength conversion, phase-sensitive amplification, can be performed. A periodically poled LiNbO 3 (PPLN) waveguide an χ (2) -based medium, it makes both wideband high-gain possible. We developed 4-port PPLN module that combine pump into with low loss. this paper, we overview applications OPA to WDM fiber transmission explain configurations modules. As our PPLN-based OPA, introduce demonstration inline exceeding 5 THz. Furthermore, demonstrate inter-band conversion between C- S-bands waveguides multi-band applications.