What question did this study set out to answer?

To evaluate the performance of AlxGa1−xAs injection laser diodes incorporating a close-confinement p+-p heterojunction across the direct bandgap alloy composition range.

July 1, 1969Applied Physics Letters

IMPROVED RED AND INFRARED LIGHT EMITTING AlxGa1−xAs LASER DIODES USING THE CLOSE-CONFINEMENT STRUCTURE

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Authors

HNH. NelsonRCA (United States)HKH. KresselPrinceton University

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Implication

Experimental study demonstrates record low threshold currents and high efficiency in AlxGa1−xAs lasers, indicating the efficacy of the close-confinement heterojunction structure.

Key Points

To evaluate the performance of AlxGa1−xAs injection laser diodes incorporating a close-confinement p+-p heterojunction across the direct bandgap alloy composition range.
Fabricated uncoated AlxGa1−xAs injection laser diodes with cavity lengths of approximately 10 mils across direct bandgap alloy compositions (0 < x ≤ 0.34).
Implemented a p+-p heterojunction structure to minimize internal optical loss and tested lasing performance and efficiency at 300°K and 77°K.
At 300°K, threshold current density increased from 12,000 A/cm² (λ = 8600 Å) to 56,000 A/cm² (λ = 7340 Å) across the composition range, while external differential quantum efficiency decreased from 40% to 16%.
At 77°K, pulsed lasing was achieved down to 6450 Å, and continuous-wave operation was attained at 6900 Å with an output power of 0.4 W per diode.

Cite This Study

Nelson et al. (1969) studied this question.

synapsesocial.com/papers/6a84712aac510c864ff313ca https://doi.org/10.1063/1.1652837

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Implication

Experimental study demonstrates record low threshold currents and high efficiency in AlxGa1−xAs lasers, indicating the efficacy of the close-confinement heterojunction structure.

IMPROVED RED AND INFRARED LIGHT EMITTING AlxGa1−xAs LASER DIODES USING THE CLOSE-CONFINEMENT STRUCTURE

Discussion

Member takes

Implication

Key Points

Cite This Study

IMPROVED RED AND INFRARED LIGHT EMITTING AlxGa1−xAs LASER DIODES USING THE CLOSE-CONFINEMENT STRUCTURE

Discussion

Member takes

Implication

Key Points

Cite This Study

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