Sagnac-loop phase shifter with polarization-independent operation

Abstract

A bulk-optics, polarization-independent phase shifter for photonic quantum information applications is demonstrated. A transverse mode electro-optic modulator using lithium niobate is placed in a Sagnac-like loop containing Faraday rotators. This direction-dependent polarization rotation in the loop is combined with a Mach-Zehnder interferometer to form an optical switch with an on/off contrast of 96% and a switching time of 1.6 ns.

References in corpus (2)

• Device-independent security of quantum cryptography against collective attacks
• High-speed linear optics quantum computing using active feed-forward

Cited by in corpus (3)

• Sub-shot-noise transmission measurement using optically gated single photons
• A high-speed tunable beam splitter for feed-forward photonic quantum information processing
• A nonlocal polarization interferometer for entanglement detection