In the late 1980s Peter Moulton, then at Schwartz Electro-Optics in Concord, Mass., developed titanium-doped sapphire as a laser gain medium with a large bandwidth.

• 1980年代末，美国史瓦兹光电研究所的摩尔顿（PeterMoulton）以掺杂钛的蓝宝石为雷射增益介质，做出了大频宽的雷射。