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首页> 外文会议>Novel in-plane semiconductor lasers XIV >Al-Free Active Region Laser Diodes At 894nm For Compact Cesium Atomic Clocks
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Al-Free Active Region Laser Diodes At 894nm For Compact Cesium Atomic Clocks

机译：紧凑型铯原子钟的894nm无铝有源区激光二极管

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摘要

Time-frequency applications are in need of high accuracy and high stability clocks. Compact industrial Cesium atomic clocks optically pumped is a promising area that could satisfy these demands. However, the stability of these clocks relies, among others, on the performances of laser diodes that are used for atomic pumping. This issue has led the Ⅲ-Ⅴ Lab to commit to the European Euripides-LAMA project that aims to provide competitive compact optical Cesium clocks for earth applications. This work will provide key experience for further space technology qualification. We are in charge of the design, fabrication and reliability of Distributed-Feedback diodes (DFB) at 894nm (D1 line of Cesium) and 852nm (D2 line). The use of D1 line for pumping will provide simplified clock architecture compared to D2 line pumping thanks to simpler atomic transitions and larger spectral separation between lines in the 894nm case. Also, D1 line pumping overcomes the issue of unpumped "dark states" that occur with D2 line. The modules should provide narrow linewidth (＜1MHz), very good reliability in time and, crucially, be insensitive to optical feedback. The development of the 894nm wavelength is grounded on our previous results for 852nm DFB. Thus, we show our first results from Al-free active region with InGaAsP quantum well broad-area lasers (100μm width, with lengths ranging from 2mm to 4mm), for further DFB operation at 894nm. We obtained low internal losses below 2cm~(-1), the external differential efficiency is 0.49W/A with uncoated facets and a low threshold current density of 190A/cm~2, for 2mm lasers at 20℃.
机译：时频应用需要高精度和高稳定性时钟。光泵浦的紧凑型工业铯原子钟是可以满足这些需求的有希望的领域。但是，这些时钟的稳定性尤其取决于用于原子泵浦的激光二极管的性能。这个问题导致Ⅲ-Ⅴ级实验室致力于欧洲Euripides-LAMA项目，该项目旨在为地球应用提供具有竞争力的紧凑型光学铯钟。这项工作将为进一步的空间技术认证提供关键经验。我们负责894nm（铯的D1线）和852nm（D2线）的分布式反馈二极管（DFB）的设计，制造和可靠性。与D2线路泵浦相比，使用D1线路泵浦将提供简化的时钟架构，这是因为在894nm情况下，原子跃迁更简单，线路之间的光谱间隔更大。同样，D1管线泵送克服了D2管线出现的非泵送“暗态”问题。这些模块应提供窄的线宽（＜1MHz），非常好的时间可靠性，并且最重要的是，对光反馈不敏感。 894nm波长的发展是基于我们先前对852nm DFB的研究结果。因此，我们展示了使用InGaAsP量子阱广域激光器（宽度为100μm，长度范围为2mm至4mm）的无铝有源区的首次结果，该结果用于894nm的进一步DFB操作。对于20毫米2mm激光器，我们获得了低于2cm〜（-1）的低内部损耗，外部差分效率为0.49W / A，未镀膜的刻面和190A / cm〜2的低阈值电流密度。

著录项

  • 来源
    《Novel in-plane semiconductor lasers XIV》|2015年|93820L.1-93820L.8|共8页
  • 会议地点 San Francisco CA(US)
  • 作者

    N. Von Bandel; J. Bebe Manga Lobe; M. Garcia; A. Larrue; Y. Robert; E. Vinet; M. Lecom te; O. Drisse; O. Parillaud; M. Krakowski;

  • 作者单位

    Alcatel Thales Ⅲ-Ⅴ Lab, 1 Ave Augustin Fresnel, 91767 Palaiseau Cedex, France;

    Alcatel Thales Ⅲ-Ⅴ Lab, 1 Ave Augustin Fresnel, 91767 Palaiseau Cedex, France;

    Alcatel Thales Ⅲ-Ⅴ Lab, 1 Ave Augustin Fresnel, 91767 Palaiseau Cedex, France;

    Alcatel Thales Ⅲ-Ⅴ Lab, 1 Ave Augustin Fresnel, 91767 Palaiseau Cedex, France;

    Alcatel Thales Ⅲ-Ⅴ Lab, 1 Ave Augustin Fresnel, 91767 Palaiseau Cedex, France;

    Alcatel Thales Ⅲ-Ⅴ Lab, 1 Ave Augustin Fresnel, 91767 Palaiseau Cedex, France;

    Alcatel Thales Ⅲ-Ⅴ Lab, 1 Ave Augustin Fresnel, 91767 Palaiseau Cedex, France;

    Alcatel Thales Ⅲ-Ⅴ Lab, 1 Ave Augustin Fresnel, 91767 Palaiseau Cedex, France;

    Alcatel Thales Ⅲ-Ⅴ Lab, 1 Ave Augustin Fresnel, 91767 Palaiseau Cedex, France;

    Alcatel Thales Ⅲ-Ⅴ Lab, 1 Ave Augustin Fresnel, 91767 Palaiseau Cedex, France;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Broad-area laser; DFB laser; 894nm; 852nm; narrow linewidth; Atomic clocks; Cesium; D1 line; D2 line; time metrology;

    机译：广域激光DFB激光； 894nm; 852nm;窄线宽原子钟；铯; D1线； D2线；时间计量;

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