Correlated Photon-Pair Source
Thorlabs' Correlated Photon-Pair Source uses spontaneous parametric down-conversion (SPDC) to create a pair of energy-time entangled photons at 810 nm. With an integrated 405 nm pump laser, this self-contained source results in >450 kHz photon pairs per second and a high-efficiency heralding ratio of >0.45.
A zero-time delay second-order correlation function [g(2) (τ = 0)] value of <0.1 can be achieved with this source, making it a high-brightness heralded single-photon source ideal for quantum optics applications.
In this SPDC source, a nonlinear crystal [periodically poled potassium titanyl phosphate (PPKTP)] converts one 405 nm pump photon into two 810 nm photons (the signal and idler) in a single event. The resulting signal and idler photons have type-II phase matching, which means they propagate with orthogonal polarizations (extraordinary and ordinary).
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- Operating Wavelength: 810 nm
- Wavelength Stability: -2.5 - 2.5 nm
- Pump Laser Power: 10 - 150 mW
- Lifetime: >2500 Hours of Pump Emission
- Max Pairs Per Second: > 450 kHz
- Extinction Ratio: > 17 dB
- Heralded g(2) Measurements
- Absorption Spectroscopy
- Quantum Metrology
- Sub-Shot-Noise Imaging
- 2-Photon Interference
- Spontaneous Parametric Down-Conversion (SPDC) Source (Collinear Type-II)
- >0.45 High-Efficiency Heralding Ratio
- >450 kHz Pair Generation Rate
- ±2.5 nm Wavelength Stability for Emitted Photons
- Pump Laser Power Adjustable from 10 mW to 150 mW
- Room Temperature Operation
- Remote Operation of 405 nm Pump Laser (Serial RS232)