The structure and operating conditions of multisegment laser (GaAl)As diode
s with passive locking of the modes of an external cavity (bulk and fibre)
were optimised. Regular trains of optical single pulses of picosecond durat
ion were generated in a spectral range 850-860 nm. The peak power of these
pulses was several watts and the repetition rate was near 1 GHz. Under cert
ain conditions these output pulses were linearly chirped, i.e. they were su
itable for subpicosecond time compression. Laboratory prototypes were made
of miniature light-emitting modules with these characteristics.