Fiber-compatible photonic feed-forward with 99% fidelity

Both photonic quantum computation and the establishment of a internet require fiber-based measurement feed-forward in order to be compatible with existing infrastructure. Here we present fiber-compatible scheme for feed-forward, whose performance is benchmarked by carrying out remote preparation single-photon polarization states at telecom-wavelengths. The result projective on one photon deterministically controls path second takes ultrafast optical switches. By placing well-calibrated {bulk} passive optics paths, achieve fidelity (99.0 $\pm$ 1)%, after correcting other experimental errors. Our methods are useful experiments including computing, communication, teleportation.