Table 1. Comparison of Reported Pulsed HOM
Visibilities VHOM and Preparation Fidelities 
for Single
Photons Emitted by QDs in the
Telecom C-Banda.
| QD type | device | excitation | pulsed VHOM |
|
ref | |
|---|---|---|---|---|---|---|
| InAs/InP | Mesa | TPE | V4ns = 35(3)% | 81(2)% | this work | |
| InAs/InP | Mesa | TPE | Vraw = 29(2)% | 81(2)% | this work | |
| InAs/InP | CBG | QR | V4ns = 19(3)% | Holewa et al. 202327 | ||
| InAs/InGaAs + MB | CBG | QR | V6ns ≈ 10% | Nawrath et al. 202319 | ||
| InAs/InGaAs + MB | planar | TPE | 84(3)% | Zeuner et al. 202118 | ||
| InAs/InGaAs + MB | planar | R | V4ns = 14(2)% | Nawrath et al. 202120 | ||
| InAs/InGaAs + MB | planar | R | 49(6)% | Nawrath et al. 201936 |
a
MB: Metamorphic buffer layer; CBG: Circular Bragg grating; R: resonant; TPE: two-photon-resonant; QR: quasi-resonant. The subscript of the visibility V refers to the coincidence histogram integration window when evaluating the HOM measurement.