1.6 W continuous-wave coherent power from large-index-step (Δn≈0.1) near-resonant, antiguided diode laser arrays

被引：54

作者：

Yang, H ^{[1
]}

Mawst, LJ ^{[1
]}

Botez, D ^{[1
]}

机构：

[1] Univ Wisconsin, Reed Ctr Photon, Madison, WI 53706 USA

来源：

APPLIED PHYSICS LETTERS | 2000年 / 76卷 / 10期

关键词：

D O I：

10.1063/1.125990

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Near-diffraction-limited-beam continuous-wave (cw) operation has been achieved to high powers from antiguided arrays with a large effective-index step between element and interelement regions. InGaAs/InGa(As)P/GaAs 40-element arrays (lambda = 0.985 mu m) emit in beams 2 x diffraction-limit (0.67 degrees) at 1.6 W and 9 x threshold in cw operation. 1 W of the coherent cw power resides in the central lobe. The external differential quantum efficiency and the threshold current are 40% and 0.4 A, respectively, for 1-mm-long devices of 191 mu m emitting aperture. The overall electrical to optical power conversion efficiency at 1.6 W output power is 23%. Modeling of the thermal effects in cw operation on the array modes reveals that for high-index-step (similar to 0.1) near-resonant antiguided arrays thermal lensing hardly affects high-order modes, and as a consequence, 2 x diffraction-limited beams can be maintained to watt-range cw powers. (C) 2000 American Institute of Physics. [S0003-6951(00)01210-9].

引用

页码：1219 / 1221

页数：3

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[3]

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