Laser oscillator

This invention describes a special laser system designed to create entangled light. It works by circulating laser pulses, which act as quantum bits (qubits), around a fiber optic loop. Along the loop, specific devices precisely adjust the light's polarization, which is how the quantum information is encoded, and then re-inject it back into the loop to build up the entanglement. The claims further specify how these qubit pulses are injected and how the polarization controllers are constructed.