Generating photon pairs from a silicon microring resonator using an electronic step recovery diode for pump pulse generation

TL;DR

This paper demonstrates a silicon microring resonator that generates photon pairs using an electronic step-recovery diode to produce pump pulses, aiming to enable compact, cost-effective quantum photonic sources without bulky lasers.

Contribution

It introduces a novel method of pump pulse generation for photon pair creation in silicon photonics using an electronic diode, reducing reliance on large laser systems.

Findings

Successful generation of photon pairs with uncorrelated spectral properties

Use of electronic step-recovery diode for pulse carving

Potential for miniaturized quantum photonic devices

Abstract

Generation of photon pairs from compact, manufacturable and inexpensive silicon (Si) photonic devices at room temperature may help develop practical applications of quantum photonics. An important characteristic of photon-pair generation is the two-photon joint spectral intensity (JSI), which describes the frequency correlations of the photon pair. In particular, heralded single-photon generation requires uncorrelated photons, rather than the highly anti-correlated photons conventionally obtained under continuous-wave (CW) pumping. Recent attempts to achieve such a factorizable JSI have used short optical pulses from mode-locked lasers, which are much more expensive and bigger table-top or rack-sized instruments compared to the Si microchip pair generator, dominate the cost and inhibit the miniaturization of the source. Here, we generate photon pairs from a Si microring resonator by using an electronic step-recovery diode to drive an electro-optic modulator which carves the pump light from a CW optical diode into pulses of the appropriate width, thus potentially eliminating the need for optical mode-locked lasers.