Fig. 1. Photon number statistical distribution of coherent light field, thermal light field, and photon correlation light field under different mean number of photons $〈n〉$. (a)‒(c) $〈n〉$=0.5; (d)‒(f) $〈n〉$=0.1; (g)‒(i) $〈n〉$=0.01

Fig. 2. Relationship between the second-order correlation function $g^{(\mathrm{2})}(\mathrm{0})$ and the mean number of photons per pulse $〈n〉$. (a) With the photon correlation light field dominating; (b) with the coherent light field and thermal light field dominating

Fig. 3. Diagram of experimental setup. (a) Experimental device diagram of photon correlation light field; (b) schematic of HBT measurement system; (c) fundamental mode electric field distribution of PCF

Fig. 4. Measurement results of 1550 nm photon correlation light field. (a) Spectrum of photon correlation light field; (b) variation in the count rate of photon with the pump power; (c) variation in the second-order correlation function $g^{(\mathrm{2})}(\mathrm{0})$ with pump power