A Nd:YAG laser device for perforating materials was developed. The device generates a modified temporal pulse structure of both free‐running andQ‐switched laser irradiation. This modified structure enhances drilling efficiency by a factor of 2 compared to free‐running irradiation and is achieved by mechanical blow‐off of preheated material. Such a device is well suited for compact portable field applications. ©1995 American Institute of Physics.