An all-fiber source of photon-pairs is experimentally demonstrated. All the components of the source are integrated in a 3U standard case. The repetition rate of pump pulses is about 20 MHz. The wavelengths of both signal and idler photons are in the 1550 nm telecom band, and the bandwidths are about 0.55 nm. The highest brightness of the photon pairs out of the source is about 4×105 pairs per second. When the brightness of photon pairs is about 104 pairs per second, the ratio between the coincidence and accidental coincidence rates is about 10, which shows there is a strong quantum correlation between the signal and idler photon pairs. Our quantum light source of photon pairs, which is portable and has the advantage of modal purity, can be coupled into the existing fiber network with extremely low loss.