Ultra broadband bi photons b are they any good

Broadband time energy entangled photon pairs bi photons and broadband squeezed light offer a rare bandwidth resource for quantum information b extreme quantum correlation in the femtosecond time scale combined with an ultra high photon flux up to 1014 s Despite these advantages the bandwidth resource of bi photons is rarely used in current experiments mainly because standard detection with photo detectors and homodyne measurement is narrowband and cannot access the broad bandwidth I wil