Ultra low power consumption operation of SOA assisted extended reach EADFB laser (AXEL)
We propose a novel structure to reduce the power consumption and extend the transmission distance of a 10-Gbit/s, 1.55-µm EADFB laser. The power consumption is reduced by 1/2 and the transmission distance is extended.
Uncooled Electroabsorption Modulator Integrated DFB Laser
Uncooled 10-Gbps, 1.55-μm InGaAlAs EA/DFB laser has been realized. Error free 80-km transmission was demonstrated up to 95 °C. A power penalty below 2-dB with over 9.8-dB dynamic extinction ratio was achieved over wide temperature range.
Planar n-SI-n heterostructure athermal InP (110) optical modulator.
We report an athermal InP (110) optical modulator with a simple planar n-SI-n heterostructure. A symmetrical push-pull operation provides a high-extinction ratio of >25 dB over the entire C-band and zero-chirp modulation. A Mach-Zehnder optical modulator (MZM) exhibits a 3 dB-EO bandwidth of 30 GHz and 40-Gb/s NRZ high-speed modulation with wavelength and temperature insensitive operation. We also successfully demonstrate an MZM integrated twin-IQ modulator that exhibits 56-Gb/s × 2 athermal QPSK modulation at constant drive and bias voltages.