| Abstract: | The problem of generating a narrow-band biphoton field during spontaneous parametric down conversion of light in a quadratic
nonlinear medium in a cavity is discussed. It is shown that, in the case of double resonance (for signal and idle fields),
the form of the single-photon wave packet is biexponential and has a half-width determined by the photon life time in the
cavity. An experiment is carried out on the generation of narrow-band biphotons in a crystal of lithium iodine with I-type
matching in a frequency degenerate collinear regime. The second-order correlation function of the cavity-enhanced biphotons
is measured using the electric nanosecond time delay line. |
