Laser performance of Cr4+:Y2SiO5

Laser action in Cr4+ doped yttrium‐orthosilicate Cr4+:Y2SiO5 cooled to 77 K was demonstrated for the first time with 1064 and 532 nm pumping from a pulsed Nd:YAG laser and broad band (@ 840 nm) pumping from a Q‐switched Cr:LiSAF laser.