A new type of laser generating nanosecond and picosecond pulses is presented. Pulses of 20ps and about 10mJ can be generated. The advantages of the proposed mode locking method are the enhancement of reproducibility ( about 100% ) and reduction of time jitter to nanoseconds, also large mode volume and high beam quality can be obtained by proper coupling of the two cavities.
Guoheng Zhao, Guoheng Zhao,
"Mode locking by coupled cavity injection", Proc. SPIE 1230, International Conference on Optoelectronic Science and Engineering '90, 12304F (1 July 1990); doi: 10.1117/12.2294796; https://doi.org/10.1117/12.2294796