12 research outputs found
Quantum Dash Actively Mode-locked Fabry-Perot Laser Module demonstrated as part of a Wavelength Tunable RZ Transmitter
International audienceA quantum dash Fabry-Perot actively modelocked laser module is tested as part of a 42.7 Gbit/s transmitter with more than 10 nm wavelength tunability. Its low chirp level is also assessed through chromatic dispersion tolerance measurements
Tunable dual-mode DFB laser for millimetre-wave signal generation
Highly compact dual-mode semiconductor laser sources get
more and more attention in different application fields such as radar,
security and personal communication systems. When the two generated
wavelengths are detected within the same photodetector, an electrical signal
which frequency is the difference between the frequencies of the two optical
modes will be issued. We report on an integrated semiconductor device which
is composed of two in-line DFB sections that are using the same optical
waveguide structure. The so generated dual-mode spectrum can be adjusted
first, by the difference in the grating parameters of each DFB section and
second, by their respective driving current. We will report on the
characterisation of such a device focusing on tunability and linewidth
aspects that are of prime importance in above mentioned applications