Yj. Wen et al., Mode-locking of long cavity Fabry-Perot semiconductor laser at millimetre wave frequencies by subharmonic optical injection, ELECTR LETT, 36(10), 2000, pp. 879-881
A long cavity Fabry-Perot laser has been forced into pulsed operation with
a repetition rate equal to its cavity resonant frequency (32.8GHz), by inje
cting short optical pulses at the fourth subharmonic (8.2GHz). Pulse trains
generated using this technique exhibit a high subharmonic suppression rati
o (> 17dB), wide locking range (> 500MHz) and low levels of jitter (< 0.4ps
).