Dual-wavelength cascaded Raman fiber laser

We have investigated the characteristics of a dual-wavelength cascaded Raman laser based on a composite resonator configuration using a fiber WDM coupler and two pairs of fiber Bragg gratings. The WDM coupler, which served to form a ring cavity and acted as an output coupler simultaneously, made the laser system simple and effective. Since the WDM coupler is made by the fused biconical taper technique and has the characteristic of periodic transmission windows, it can be designed to resonate at wavelengths corresponding to high odd Stokes orders simultaneously