Design Of A Fiber Coupled Diode Laser Based On A Novel Beam Shaping Component Which Is Provided With Beam Collimating And Re-Orienting

Fiber coupled diode laser source is one of the important applications of diode laser. Aimed at a multi-mode fiber of 105 mu m core diameter and 0.15 numerical aperture, a fiber coupled diode laser system based on a novel reflected aspherical beam shaping component which combines the beam collimating and re-orienting is designed, and a single polarization model is used to validate the design. The simulation and experiment all show that: the system can couple 16 single emitter diode lasers into the multi-mode fiber of 105 mu m core diameter and 0.15 numerical aperture. In the principle validate experiment of 8 emitters, when the operation current is 10.5A, the output power can achieve 62W, the brightness is 10MW/(cm2 center dot sr), and the E-O efficiency is 52%, separately. In this design, the ratio of the system length and width can be adjusted by changing the offset of the reflected aspherical beam shaping component, so that the system can satisfy different structure demands. Moreover, the novel beam shaping component will effectively conduce to reducing the components amount in the system, which can improve the system integration and reliability. This fiber coupled diode laser can be applied in fiber pumping, material processing and many other areas after being engineered.