Low threshold InGaAs/GaAs 45 degrees folded cavity surface-emitting laser grown on structured substrates

A novel folded cavity surface-emitting laser structure integrating a horizontal cavity InGaAs/GaAs laser grown on a structured substrate with a high reflectivity Bragg reflector has been fabricated. Devices with threshold currents of 8 mA and CW wall plug efficiencies at 5% at 6 mW output power have been demonstrated at a wavelength of 0.99 mu m. By combining a cleaved uncoated mirror with the 45 degrees deflecting mirror the authors have obtained threshold current as low as 5 mA for a device 450 mu m long.<
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