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Low threshold CW operation of circular-grating surface-emitting DBR lasers using MQW and a self-aligned process

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6 Author(s)
Fallahi, M. ; Solid State Optoelectronics Consortium, Nat. Res. Council of Canada, Ottawa, Ont., Canada ; Dion, M. ; Chatenoud, F. ; Templeton, I.M.
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In this letter, we present the first room temperature continuous wave operation of circular-grating surface-emitting DBR lasers. The structure is an InGaAs/GaAs strained multiquantum-well. A modified fabrication process with a better control on the steps is used. A CW threshold current as low as 26 mA at a lasing wavelength of about 977 mm are reported. This is the first demonstration of CW operation for these lasers in any material system.<>

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Photonics Technology Letters, IEEE  (Volume:6 ,  Issue: 11 )