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Appl. Phys. Lett. 41, 129 (1982); http://dx.doi.org/10.1063/1.93426 (3 pages)
Thermal waveguiding in oxide‐defined, narrow‐stripe, large‐optical‐cavity lasers
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Add to FacebookThe characteristics of oxide‐defined, narrow‐stripe large‐optical‐cavity (LOC) AlGaAs lasers are described. Compared with regular narrow‐stripe double heterostructure (DH) lasers, the LOC version exhibits more narrowing of the near‐field and far‐field distributions, higher astigmatism, higher differential quantum efficiency, and higher incidence of sustained pulsations. We have found that these phenomena can be explained in terms of the formation of a thermal waveguide. There is often a striking similarity in characteristics of narrow‐stripe LOC and degraded narrow‐ stripe DH lasers. We suggest that a thermal waveguiding effect is an important factor in determining the behavior of degraded semiconductor lasers.
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H. F. Lockwood, H. Kressel, H. S. Sommers, and F. Z. Hawylo, Appl. Phys. Lett. 17, 499 (1970APPLAB000017000011000499000001).
D. D. Cook and F. R. Nash, J. Appl. Phys. 46, 1660 (1975JAPIAU000046000004001660000001).
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