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Design and Analysis of High-temperature Operating 795-nm VCSELs for 87Rb Based Chip-Scale Atomic Clock

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Design of the active region and analysis of temperature sensitivity of high-temperature operating 795-nm special VCSELs for Chip-Scale Atomic Clock are firstly presented. Composition and thickness of the InAlGaAs multiply quantum well (MQWs) are optimized at room and elevated temperatures. Temperature sensitivity of the threshold current is analyzed by calculating the temperature dependence of cavity-mode gain over a broad temperature range(25°C-150°C). A self-consistent VCSEL model based on quasi 3D finite element analysis is employed to investigate self-heating effects and temperature distribution in the proposed structure. Output power of 2.5mW is expected from 5-micron aperture VCSELs at 10mA current at ambient temperature of 358K.

© 2011 Optical Society of America

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