Ea. Avrutin et al., Analysis of harmonic (sub)THz passive mode-locking in monolithic compound cavity Fabry-Perot and ring laser diodes, IEE P-OPTO, 146(1), 1999, pp. 55-61
The authors analyse harmonic mode-locking at (sub)terahertz frequencies in
linear Fabry-Perot compound-cavity laser diodes (theoretically), and in rin
g structures (experimentally and theoretically) and compare these lasers wi
th other constructions used for harmonic mode-locking.