High Data Rate Modulation of High Power 1060-nm DBR Tapered Lasers With Separate Contacts
IEEE Photonics Technol. Lett., vol. 25, no. 22, pp. 2171-2173 (2013).
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Direct optical modulation at 2.5 Gb/s with amplitude of more than 0.5 W has been demonstrated in single longitudinal mode distributed Bragg reflector tapered lasers emitting at 1060 nm with separated injection of the ridge waveguide and tapered sections. The modulating signal of ∼110 mA peak to peak was applied to the ridge waveguide section, yielding a high modulation efficiency of ∼5 W/A. The large-signal frequency response of the experimental set-up was limited by the bandwidth of the electrical amplifier rather than by the internal dynamics of the laser, indicating that higher bit rates could be achieved with improved driving electronics.
1 Universidad Politécnica de Madrid, ETSI Telecomunicación-CEMDATIC, Madrid 28040, Spain
2 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
High brightness semiconductor lasers, direct modulation, multi-contact lasers.