Wideband multiwavelength output generation based on cascaded four-wave mixing in distributed Raman amplifier utilizing a Fabry-Pérot laser diode

•Multiwavelength generation of cascaded effect of four wave mixing is proposed.•The highly nonlinear fiber is utilized as the distributed Raman gain medium.•The Fabry-Pérot laser diode is used as the pump source and seed wavelength.•Multiwavelength with 43nm wide bandwidth is obtained. Multiwavelength output generation based on cascaded four-wave mixing in a distributed Raman amplifier is demonstrated experimentally. The technique consists of launching a probe signal and Fabry-Pérot pump source in a co-propagating setup into a 2km length of highly nonlinear fiber. In this configuration, the Fabry-Pérot laser diode plays two roles; as a Raman pump and as a source for multiple wavelengths generation. The output of multiple wavelengths with 27.8GHz spacing centered around the probe signal is generated over 43nm operation bandwidth. Besides, the bandwidth of the multiwavelength spectrum is also investigated at different wavelength ranges.