Multiple laser beams can be combined into one fiber with little loss if they have different physical properties, such as polarization, wavelength, and mode profile. We produce fiber optical polarization combiners that combine two polarized lights into one fiber. We make WDM that combines up to 100 tightly spaced wavelengths into a single fiber. Another method commonly used in a fiber laser is to combine several laser beams into a larger mode diameter fiber. We fabricate up to 7 fibers into one fiber. We make various wavelength combiners with custom configurations.