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- W2010421554 abstract "ABSTRACT We demonstrate novel electrically pumped 1300 nm and 1550 nm VCSELs with two InP/air-gap DBRs. The activeregions comprise conventional InGaAsP multiple quantum wells. A tunnel junction is placed between the active regionand top DBR to convert electrons into holes, thus minimizing the use of p-type material in the structure to reduce thefree-carrier loss and achieve current confinement. The whole structure was grown in a single growth run by lowpressure MOCVD. For both 1300 and 1550 nm emission wavelengths, air-gap DBR VCSELs exhibit room-temperature, CW threshold current density as low as 1.1 kA/cm 2 , differential quantum efficiency greater than 30%, andCW operation up to 85°C. The single-mode output power was 1.6 mW from a 1300 nm VCSEL with a 6.3 µ maperture; and 1.1 mW from a 1550 nm VCSEL with a 5.7 µ m aperture under room temperature CW operationKeywords: long wavelength VCSELs, vertical-cavity surface-emitting laser, InP/Air-gap DBRs, tunnel junctions,distributed Bragg reflector, quantum well lasers, semiconductor lasers." @default.
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- W2010421554 date "2004-06-16" @default.
- W2010421554 modified "2023-09-23" @default.
- W2010421554 title "Long-wavelength VCSELs with InP/air-gap DBRs" @default.
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- W2010421554 doi "https://doi.org/10.1117/12.538327" @default.
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