Deeply focusing light at 1550 nm through strongly scattering media

Wavefront shaping is a mainstream technique of focusing light through strongly scattering media. The usage of near infrared (NIR) source in wavefront shaping attracts attentions due to its promising applications for deeply focusing light. In this paper, we experimentally demonstrate that the light at 1550 nm wavelength focus through a strongly scattering media (ZnO) by controlling DMD and using genetic algorithm (GA). As deep as 456 μm focusing depth is realized when focusing 1550 nm light through a ZnO layer. In addition, focusing one or multiple spots in arbitrary positions through a ZnO layer is also achieved by using 1550 nm light.