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Monolithic oxide-confined multiple-wavelength vertical-cavity surface-emitting laser arrays with a 57-nm wavelength grading range using an oxidized upper Bragg mirror

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5 Author(s)
Kai Yang ; Center for High Technol. Mater., New Mexico Univ., Albuquerque, NM, USA ; Yuxin Zhou ; Huang, X.D. ; Hains, C.P.
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Monolithic, oxide-confined, multiple-wavelength vertical-cavity surface-emitting laser arrays with a very large periodic, wavelength grading span of 57 nm (from 968 to 1025 nm) have been achieved under room temperature, continuous-wave operation, with threshold currents of 4.5 mA/spl plusmn/1.5 mA. Almost linear wavelength grading is achieved by organometallic vapor phase epitaxial growth on a patterned substrate. An extended wavelength range is achieved by minimizing the optical loss dispersion by scaling the growth rate of all the epilayers and using a selectively-oxidized upper DBR mirror with a flattened optical reflectance spectrum, plus the higher differential optical gain provided by compressively-strained In/sub 0.2/Ga/sub 0.8/As-GaAs quantum wells.

Published in:

Photonics Technology Letters, IEEE  (Volume:12 ,  Issue: 4 )