Coupling the output of a laser diode into an optical fiber makes delivering light easier, Photonstream offers one of the widest wavelength selections of Fiber Coupled Laser Diodes. Our fiber coupled Diode Laser products include single mode fiber coupled laser diode , multimode single emitter and multi-emitter fiber coupled modules. Advantages of fiber coupled green laser Fiber-coupled diode lasers also have several other advantages: The light exiting the fiber has a circular and uniform intensity profile. singlemode versus multimode. It allows the laser diode to fiber coupling and heatsink to be located remotely from where the laser light is used. Defective fiber-coupled diode lasers can easily be replaced without changing the alignment of the device where the light is used. Fiber-coupled devices can be easily combined with other fiber-optic components.