Ideal binary optical microlenses for laser-to-fiber coupling

摘要

Coupling efficiency is an important fact in optical fiber communication, it can be increased greatly by using an ideal Binary Optical Microlenses (BOML). Using phase balance method, we designed the BOML. The BOML's diffractive far field results was analyzed by the accumulating integral method. Properly coated for reflections, the lenses of the new design have theoretical coupling efficiency of 100%, and could excite 99.60% fundamental mode in the multi-mode receiving fiber and 99.95% coupling efficiency in the single-mode receiving fiber.