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Above-Threshold Numerical Modeling of High-Index-Contrast Photonic-Crystal Quantum Cascade Lasers

机译：高折射率光子晶体量子级联激光器的阈值以上数值模拟

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摘要

Three-dimensional above-threshold analyses of high-index-contrast (HC) photonic-crystal (PC) quantum-cascade-laser arrays (QCLA) structures, for operation at watt-range CW powers in a single spatial mode, have been performed. Three-element HC-PC structures are formed by alternating active- antiguided and passive-guided regions along with respective metal-electrode spatial profiling. The 3-D numerical code takes into account absorption and edge-radiation losses. Rigrod's approximation is used for the gain. The specific feature of QCLA is that only the transverse component of the magnetic field sees the gain. Results of above-threshold laser modeling in various approximate versions of laser-cavity description are compared with the results of linear, full-vectorial modeling by using the COMSOL package. Additionally, modal gains for several higher-order optical modes, on a 'frozen gain background' produced by the fundamental-mode, are computed by the Arnoldi algorithm. The gain spatial-hole burning effect results in growth of the competing modes' gain with drive current. Approaching the lasing threshold for a competing higher-order mode sets a limit on the single-mode operation range. The modal structure and stability are studied over a wide range in the variation of the inter-element widths. Numerical analyses predict that the proper choice of construction parameters ensures stable single-mode operation at high drive levels above threshold. The output power from a single- mode operated QCLA at a wavelength of 4.7 μm is predicted to be available at multi-watt levels, although this power may be restricted by thermal effects.
机译：进行了高折射率（HC）光子晶体（PC）量子级联激光阵列（QCLA）结构的三维阈值分析，以便在单个空间模式下以瓦特范围CW功率运行。三元素HC-PC结构由交替的主动反导和被动导引区域以及相应的金属电极空间分布图形成。 3-D数字代码考虑了吸收和边缘辐射损耗。增益采用里格罗德近似值。 QCLA的特定特征是只有磁场的横向分量才能看到增益。使用COMSOL软件包，将激光腔描述的各种近似版本中的阈值以上激光建模结果与线性，全矢量建模结果进行了比较。此外，由Arnoldi算法计算出在基本模式产生的“冻结增益背景”下，几种高阶光学模式的模态增益。增益空间孔燃烧效应导致竞争模式的增益随驱动电流而增长。接近竞争高阶模式的激射阈值会限制单模工作范围。在单元间宽度的变化范围内研究了模态结构和稳定性。数值分析预测，正​​确选择构造参数可确保在高于阈值的高驱动水平下稳定的单模运行。预计单模式操作QCLA在4.7μm波长处的输出功率可以达到多瓦特级别，尽管该功率可能受热效应的限制。

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  • 来源
    《Novel in-plane semiconductor lasers XIV》|2015年|93821L.1-93821L.11|共11页
  • 会议地点 San Francisco CA(US)
  • 作者

    A. P. Napartovich; N. N. Elkm; D. V. Vysotsky; J. Kirch; C. Sigler; D. Botez; L. J. Mawst; A. Belyanin;

  • 作者单位

    Troitsk Institute for Innovation and Fusion Research, TRINITI, Troitsk Moscow, Russia 142190,P. N. Lebedev Physical Institute RAS, Leninsky prosp. 53, Moscow, Russia;

    Troitsk Institute for Innovation and Fusion Research, TRINITI, Troitsk Moscow, Russia 142190,Moscow Institute for Physics and Technology, Institutsky per. 9, Dolgoprudny Moscow reg., Russia;

    Troitsk Institute for Innovation and Fusion Research, TRINITI, Troitsk Moscow, Russia 142190,Moscow Institute for Physics and Technology, Institutsky per. 9, Dolgoprudny Moscow reg., Russia;

    University of Wisconsin-Madison, 1415 Engineering Dr., Madison, WI, USA 53706;

    University of Wisconsin-Madison, 1415 Engineering Dr., Madison, WI, USA 53706;

    University of Wisconsin-Madison, 1415 Engineering Dr., Madison, WI, USA 53706;

    University of Wisconsin-Madison, 1415 Engineering Dr., Madison, WI, USA 53706;

    Department of Physics Astronomy, Texas AM University, College Station;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    quantum cascade; single-mode laser; above threshold modelling;

    机译：量子级联单模激光阈值以上建模;

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