  Three-dimensional (3D) printing has allowed for production of geometrically
complex 3D objects with extreme flexibility, which is currently undergoing
rapid expansions in terms of materials, functionalities, as well as areas of
application. When attempting to print 3D microstructures in glass, femtosecond
laser induced chemical etching (FLICE) has proved itself a powerful approach.
Here, we demonstrate fabrication of macro-scale 3D glass objects of large
heights up to ~3.8 cm with a well-balanced (i.e., lateral vs longitudinal)
spatial resolution of ~20 {\mu}m. The remarkable accomplishment is achieved by
revealing an unexplored regime in the interaction of ultrafast laser pulses
with fused silica which results in aberration-free focusing of the laser pulses
deeply inside fused silica.
