Transverse mode discrimination in long-wavelength wafer-fused vertical-cavity surface-emitting lasers by intra-cavity patterning.
Transverse mode discrimination is demonstrated in long-wavelength wafer-fused vertical-cavity surface-emitting lasers using ring-shaped air gap patterns at the fused interface between the cavity and the top distributed Bragg reflector. A significant number of devices with varying pattern dimensions was investigated by on-wafer mapping, allowing in particular the identification of a design that reproducibly increases the maximal single-mode emitted power by about 30 %. Numerical simulations support these observations and allow specifying optimized ring dimensions for which higher-order transverse modes are localized out of the optical aperture. These simulations predict further enhancement of the single-mode properties of the devices with negligible penalty on threshold current and emitted power.
Nicolas
N
Volet
Tomasz
T
Czyszanowski
Jaroslaw
J
Walczak
Lukas
L
Mutter
Benjamin
B
Dwir
Zlatko
Z
Micković
Pascal
P
Gallo
Andrei
A
Caliman
Alexei
A
Sirbu
Alexandru
A
Mereuta
Vladimir
V
Iakovlev
Eli
E
Kapon