1.3-$\mu$ m GaNAsSb–GaAs UTC-Photodetectors for 10-Gigabit Ethernet Links

We report on 10 gigabit Ethernet (IEEE 802.3ae) fiber-optic transmission at 1.3 mum wavelengh utilizing high-speed GaNAsSb uni-travelling-carrier photodetectors (PDs) grown on GaAs substrate. With an optical bandgap of ~0.88 eV, the PDs are suitable for near-infrared operation up to wavelengths of about 1380 nm. The dc responsivity and 3-dB cut-off frequency of the non-antireflection-coated PD at 1.3-mu m wavelength are 0.35 A/W and 14 GHz, respectively. Using this GaAs-based GaNAsSb PD, an error-free (bit-error rate=10
^-12
) transmission of 10-Gb Ethernet data at 1.3-mu m wavelength is successfully demonstrated.