Densely-aligned void arrays of the length of hundreds of micrometers are fabricated in SrTiO3 crystal by tightly focusing multiple femtosecond (fs) pulses and fixing the focal point at a certain depth of SrTiO3 crystal without translation. The effect of the laser energy and the laser irradiation time as the well as entrance crystal plane on the induced structures is investigated. It is possible to control these factors to achieve the desirable void strings. This kind of self-fabrication method c
