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首页> 外文期刊>IEEE Photonics Technology Letters >Lateral Mode Discrimination and Self-Stabilization in Ridge Waveguide Laser Diodes
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Lateral Mode Discrimination and Self-Stabilization in Ridge Waveguide Laser Diodes

机译:脊形波导激光二极管中的横向模式识别和自稳定

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摘要

Lateral mode discrimination and output stability is experimentally investigated in ridge waveguide laser diodes, having various residual guide thicknesses outside the ridge region. It is found that a critical residual thickness exists below which the lasers emit in a single mode, with a low threshold current. Above this critical value, the threshold current rises rapidly with the residual guide thickness, and the lasers oscillate simultaneously in the two lowest order lateral modes. Increasing the injected current intensity, in this regime, results in nonlinear light output-current curves, but also improves mode discrimination in favor of the fundamental mode, until single-mode operation is re-established. A simple mechanism is suggested to explain this phenomenon.
机译:在脊形波导激光二极管中,通过实验研究了横向模式识别和输出稳定性,在脊形区域之外具有各种剩余的导向厚度。发现存在临界残余厚度,在该残余厚度以下,激光器以低阈值电流以单模发射。高于此临界值,阈值电流会随着剩余的导向厚度而迅速上升,并且激光器会以两个最低阶的横向模式同时振荡。在这种情况下,增加注入的电流强度会导致非线性的光输出电流曲线,但也会改善模式分辨力,有利于基本模式,直到重新建立单模式操作为止。建议使用一种简单的机制来解释此现象。

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