Multiphoton sources

Two-photon source:

• ▸ BBO crystal cascade
• ▸ separable to max. entangled photon pairs
• ▸ 120MHz or 1Hz - 50kHz pumping freq.
• ▸ max. rate 20k pairs per sec.
• ▸ HOM dip visibility cca. 97 %
• ▸ state purity 94 - 98 %

Three-photon source:

• ▸ BBO crystal cascade + atten. beam
• ▸ separable or entangled photon pairs + additional photon
• ▸ 76MHz pumping frequency
• ▸ typical 3-photon rate: 20 per s
• ▸ Tapster-Rarity visibility 75 %

Four-photon source:

• ▸ two BBO crystal cascades
• ▸ separable to max. entangled photon pairs
• ▸ 76MHz pumping freq.
• ▸ separable states rate: 100 per 10 min.
• ▸ entangled states rate: 25 per 10 min.
• ▸ cross pair HOM dip visibility about 60 - 70 %

Bulk and fiber optics

• ▸ bulk-optical components, from soft-UV to NIR
• ▸ sets of fibers, fiber beam splitters, 600 - 850 nm
• ▸ precision motorized and rotation stages, piezzo translators

Photon detection

Binary detector – Single-Photon Counting Module:

• ▸ plenty of SPCM-AQR-14-FC
• ▸ quantum efficiency at 800 nm 50%
• ▸ dark counts <100/s
• ▸ saturation for >15 Mc/s
• ▸ photon number resolution in fibre loop configuration

Single photon CCD cameras:

• ▸ Electron Multiplying CCD Andor DU 888 Back Illuminated
   (quantum efficiency >90% at 580 nm,
   EM gain 1-1000, resolution 1024x1024)
• ▸ Intensified CCD Andor DH 734
   (spectral range 300 – 900 nm,
   overall efficiency 20%, resolution 1024x1024)
• ▸ Streak camera Hamamatsu C10910
   (spectral range 230 – 900 nm,
   time resolution 1 ps – 1 ms)

Special photon number resolving detectors:

• ▸ Hybrid photodetector Hamamatsu R10467U-40
   (spectral range 300 – 730 nm,
   max quantum efficiency 52% at 500 nm)
• ▸ Multi-photon counting module Hamamatsu C11208-03
   (spectral range 320 – 900 nm,
   max quantum efficiency 50% @ 440 nm, 10x10 active pxs)

Electronics:

• ▸ NIM-BIN modules for coincidence measurement
• ▸ fast oscilloscope

Recent papers: