Telecoms-wavelength vertical-cavity surface-emitting lasers (VCSELs) capable of operating at up to 110°C with high wavelength stability and low threshold currents.
Pioneering work by Lancaster University and collaborators has led to the demonstration of telecoms-wavelength vertical-cavity surface-emitting lasers (VCSELs) capable of operating at up to 110°C with high wavelength stability and low threshold currents.
Through the use of self-assembled GaSb quantum rings in the active region, the invention has overcome the limitations of excessive strain that has previously prevented GaAs/AlGaAs distributed Bragg reflector (DBR) VCSELs from emitting at wavelengths beyond ~1 mm.
The technology offers low-cost, cooler-free operation with emission at 1150 to 1350 nm with high wavelength-stability and ultra-low threshold current densities. Emission at longer wavelengths is currently under development.
- Telecoms wavelengths
- Conventional DBR technology on low-cost GaAs substrates
- Cooler-free operation
- Excellent wavelength stability
- Low threshold currents
Conventional DBR technology on low-cost GaAs substrates
Excellent wavelength stability
Low threshold currents
Upstream FTTP laser
Datacoms at telecoms wavelengths
Proximity sensing, gesture recognition and 3D imaging