Multimode, step-index optical fibers offer the most efficient and flexible delivery of high power laser beams. The correct components should be selected for minimizing beam quality degradation and optimum robustness. Smaller fibers tend to produce less degradation to beam quality but the minimum usable fiber size is limited by the quality of the laser beam, focusing optic and the numerical aperture (N.A.) of the fiber. Selection of the appropriate fiber type is an important consideration because the characteristics of the output beam will enhance or degrade the utility of the fiber optic delivered beam for different applications. The other components of the beam delivery system also impact performance: High power handling requires high quality end face surface finish and specially designed connectors that can withstand heating which comes from the absorption of spurious reflections at the fiber end faces. The fiber optic delivery system allows the laser beam to be transmitted in a small, flexible cable and is ideal when the laser beam must be delivered along a complex path or processing requires complicated manipulation of the beam delivery optics.
主要特点:
Laser polished fiber ends High power applications employ a high conductivity copper ferrule in the nose of the connector allowing for greater heat dissipation in event of scattered energy at tip Heat sink designed to pull heat away from fiber by being thermally and mechanically connected to HP-SMA connector and allows for handling ruggedness, prevent bending of the fiber and maintain beam quality HP-SMA (High Power) utilizes well type "air gap" ferrule technology that holds the fiber tip in air to eliminate energy absorbing materials at fiber end Cantilevered fiber end is able to accept very high powers Smaller fiber diameters incorporate a pure fused silica sleeve at the tip to support fiber without addition of energy absorbing materials Conservatively accommodates peak power densities of 1.3KW/mm2 for CW applications and 5MW/mm2 for pulsed applications Incorporated into and designed into customer specific applications Standard core diameters of 200pm to 1500pm Numerical aperture (N.A.) of 0.12,0.22. 0.26, 0.37 and 0.39 Plastic Clad Silica (PCS), Hard Clad Silica, Hard Coated Silica/Silica, and Polymer Coated Silica/Silica fiber in standard OH and low OH versions Wide variety of sheathings/protective jackets