Monolithic oxide-confined multiple-wavelength vertical-cavitysurface-emitting laser arrays with a 57-nm wavelength grading rangeusing an oxidized upper Bragg mirror |
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Authors: | Kai Yang Yuxin Zhou Huang XD Hains CP Julian Cheng |
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Affiliation: | Center for High Technol. Mater., New Mexico Univ., Albuquerque, NM; |
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Abstract: | 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±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 In0.2Ga0.8As-GaAs quantum wells |
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