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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Contra-directional pump reject filters integrated with a micro-ring resonator photon-pair source in silicon
Optics Express
|October 7, 2021
Summary
Integrated silicon photon-pair sources with novel pump reject filters achieve high coincidence-to-accidental ratios, rivaling external systems. This advancement is key for scalable quantum photonic integrated circuits.
Area of Science:
- Quantum optics
- Integrated photonics
- Materials science
Background:
- High coincidence-to-accidental ratio (CAR) is critical for integrated photon-pair sources (PPSs) with pump reject filters (PRFs).
- Current integrated PPS/PRF chips show lower CAR than stand-alone sources with external PRFs.
Purpose of the Study:
- To report measured and modeled CAR values for an integrated micro-ring resonator PPS with a novel PRF.
- To compare the performance of this integrated system against stand-alone sources.
Main Methods:
- Integration of a micro-ring resonator PPS with a three-stage, cascaded contra-directional coupler (CDC) based PRF.
- Measurement and modeling of CAR values for the integrated device.
Main Results:
- The integrated PPS/PRF chip demonstrated CAR values comparable to some stand-alone sources.
- CDC-based PRFs offer compact footprint and wide, tunable-free rejection bands.
Conclusions:
- The developed integrated PPS with CDC-based PRF achieves high CAR, overcoming limitations of previous integrated solutions.
- This technology paves the way for more efficient and scalable quantum photonic integrated circuits.
