Patent ID: 7373059

Claim:
A polarization entangled-photon state source comprising: a single transmission layer configured for transmitting electromagnetic radiation; a beamsplitter embedded in the transmission layer configured to receive a pump beam and output a first pump beam and a second pump beam; a down-conversion device embedded in the transmission layer and configured to receive the first pump beam and output both a first signal beam and a first idler beam and receive the second pump beam and output a second signal beam and a second idler beam; a mode converter embedded in the transmission layer configured to convert electric field components of both the first signal beam and the first idler beam into magnetic field components and convert magnetic field components of both the first signal beam and the first idler beam into electric field components; and a combiner embedded in the transmission layer configured to receive the first and second signal beams and the first and second idler beams and output the first and second signal beams and the first and second idler beams in an entangled state.