Spectral shearing of quantum light pulses by electro-optic phase modulation

TL;DR

This paper introduces a deterministic electro-optic method for spectral shearing of quantum light pulses that preserves their quantum coherence, enabling scalable and reconfigurable spectral manipulation for quantum information processing.

Contribution

It presents a novel linear-optics technique using electro-optic Doppler shifts for spectral shearing of quantum light, maintaining wave-packet coherence and quantum properties.

Findings

Achieved spectral shear of ±200 GHz on heralded single photons.

Demonstrated preservation of quantum coherence during spectral manipulation.

Showed the method's scalability and reconfigurability for quantum applications.

Abstract

Frequency conversion of non-classical light enables robust encoding of quantum information based upon spectral multiplexing that is particularly well-suited to integrated-optics platforms. Here we present an intrinsically deterministic linear-optics approach to spectral shearing of quantum light pulses and show it preserves the wave-packet coherence and quantum nature of light. The technique is based upon an electro-optic Doppler shift to implement frequency shear of heralded single-photon wave packets by $\pm 200$ GHz, which can be scaled to an arbitrary shift. These results demonstrate a reconfigurable, unitary method to controlling the spectral-temporal mode structure of quantum light.