US Patent 9749054 Multilayer vertical cavity surface emitting electro-absorption optical transceiver

Aspects of embodiments relate to an optical transceiver device, comprising: a detection region for detecting light at a first wavelength for down-conversion; and a modulation region for modulating light at a second wavelength longer than the first wavelength, wherein the detection region is substantially transparent to light at the second wavelength and located upstream to the modulation with respect to direction of propagation of first wavelength light incident onto the detection region.