A laser-cutting technique was used to pattern high-temperature superco
nducting single crystals with high precision into various shapes. The
low mean power of 135 mW of the laser enables one to produce cuts of a
rbitrary shape without affecting the superconducting parameters. This
was proven by local observations of the magnetic flux distribution usi
ng the magnetooptical Faraday effect. (C) 1996 American Institute of P
hysics.