The large design flexibility offered by the photonic crystal fiber technology enables a range of fibers tailored for individual applications. Our fiber design team is available to support your idea or fiber specifications to develop an optimum fiber in each case. A variety of core dopants are possible such as Yb, Nd, Er, Er/Yb, Tm, Ho and others. Co-doping with photosensitive materials is also possible to allow fiber grating inscription. The fiber parameter space is very wide and a large range of signal and pump core dimensions are possible. Examples of custom designed fibers: Highly nonlinear fibers with specific zero-dispersion wavelength Highly nonlinear and rare earth doped fiber Rare earth doped large mode area fiber Rare earth doped double clad fiber with high NA and large mode-area Large mode area fiber for UV operation Multi-core fiber - also rare earth doped Multi-mode fiber with specific NA and core diameter Custom combiners. For more information see here. Please contact our sales department for further information.