Julian Cheng

Efficient CW lasing and high-speed Modulation of 1.3-μm AlGaInAs VCSELs with good high temperature lasing performance

The 1.31-/spl mu/m AlGaInAs vertical-cavity surface-emitting lasers achieved efficient single-mode (SM) continuous-wave lasing at temperatures up to 120/spl deg/C, with 2.0-mW output power and 31% slope efficiency, as well as multimode (MM) lasing with up to 9-mW output power and up to 39% slope efficiency. High-speed modulation at data rates up to 10 Gb/s and transmission through different lengths of SM and MM fiber are demonstrated.

Long-wavelength VCSEL-based CWDM scheme for 10-GbE links

We have implemented a coarse wavelength-division-multiplexing scheme based on uncooled long-wavelength vertical-cavity surface-emitting lasers (VCSELs) for 10-GbE transmission over 62.5-mm multimode fiber. Long-wavelength VCSELs were fabricated at the nominal wavelengths of 1275, 1300, 1325, and 1350 nm and integrated into a XENPAK module. Individual VCSELs require a drive current of 10 mA or less at 20/spl deg/C-85/spl deg/C.

Long-wavelength VCSEL: the technology for 10-gigabit enterprise networks

Long wavelength VCSELs at 1300 nm have been developed to serve 10-Gigabit enterprise networks over FDDI grade multimode fibers up to 300 m in distance. The long wavelength VCSELs operate CW at temperatures over 100 °C. They are ideal low cost alternatives to DFB lasers for transceivers and transponders compatible with IEEE 10GBASE-LX4 or 10GBASE-LRM standards over multimode fibers.

Long wavelength VCSEL: The technology for 10-gigabit enterprise networks

Long wavelength VCSELs at 1300 nm have been developed to serve 10-Gigabit enterprise networks over FDDI grade multimode fibers up to 300 m in distance. The long wavelength VCSELs operate CW at temperatures over 100 °C. They are ideal low cost alternatives to DFB lasers for transceivers and transponders compatible with IEEE 10GBASE-LX4 or 10GBASE-LRM standards over multimode fibers.

Optically-pumped long-wavelength vertical-cavity surface-emitting laser with high modulation bandwidth

Optically-pumped long-wavelength vertical-cavity surface-emitting lasers (VCSELs) have been fabricated exhibiting more than 2mW over 20–70°C, and 1.25mW at 85°C. Small-signal modulation measurements on the VCSEL at 20°C indicate a 3dB bandwidth of 14.8GHz at an output power of 2mW. The VCSELs have a narrow spectral width suitable for data transmission over single-mode fiber. The good temperature performance of the VCSEL is maintained in a suspended configuration that would allow monolithic integration.

Optically-pumped long wavelength VCSEL

Optically-pumped long wavelength VCSELs emitting at 1.3 µm have been achieved in a compact format. Continuous-wave, single-mode lasing operation has been demonstrated with low lasing threshold, high output power, and a large SMSR over a wide range of operating temperatures.