Compact picosecond Nd:glass mode-locked laser with variable cavity length from 5 to 21 m.
Schiller NH, Zhao XM, Liang XC, Wang LM, Alfano RR. Compact picosecond Nd:glass mode-locked laser with variable cavity length from 5 to 21 m. Appl Opt. 1989 Mar 01; 28(5):946-8.