Laser Diode Fiber Optic Coupling

The laser has a beam diameter of 0 81 mm and divergence 1 0 mrad.

Laser diode fiber optic coupling.

The used fibers and techniques differ very much for different diode lasers. The beam was delivered via a 1 mm diameter optic fiber terminated with a 200 mm collimating and focussing optic attached to a motoman up20 robot see figure 20 5a. Fiber optics are widely used in laser technology because of their ability to trap light and guide it from one location to another without experiencing. Let s consider coupling the light from a r 30990 hene laser into an f msd fiber.

The fiber has a core diameter of 50 µm and an na of 0 20. An even more important restriction is that the angle from the lens to the fiber θ 2 must be less than the na of the optical fiber. Optical communication devices are an important foundation of the information industry. Core diameter and numerical aperture we mentioned how the numerical aperture depends on the relationship between the index of the core and the cladding and that this directly relates to the angular.

A single mode fiber coupling to a laser diode is a crucial technology for optical communication the application of which has drawn much attention. Fiber coupling part 1 of 2 fiber coupled diode lasers have become commonplace since the telecom boom of the 1990s but many people still don t fully understand the intricacies of the fiber coupling process itself.