Influence of amplified luminescence, recombination nonlinearities and temperature on high-speed modulation and chaotic properties of long-wavelength laser diodes

1999 Symposium on High Performance Electron Devices for Microwave and Optoelectronic Applications. EDMO (Cat. No.99TH8401) Pub Date : 1999-11-22 DOI:10.1109/EDMO.1999.821498

L. Burov, M. Kramar, A. Kuleshov, G. I. Ryabtsev, K. Shore, S. V. Voitikov

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Abstract

The high-speed response of long-wavelength laser diodes to harmonic modulation of the injection current has been investigated and modeled. It is shown that intrinsic nonlinearities of gain, recombination processes, and amplified luminescence significantly affect the high-speed laser dynamics. The description of amplified luminescence is based on a space distribution model. Increase in the amplitude of current modulation results in a non-harmonic output response whose form is greatly dependent on the value of the modulation frequency. For a certain frequency region the laser diode output displays harmonic-like response, and the higher the mean current the faster the distortion of harmonic response. It has been shown that temperature increase distorts the modulation characteristics of the lasers. Hence, intrinsic nonlinearities and temperature of long-wavelength laser diodes may create and govern complex regimes of laser dynamics including those used in encoding-decoding laser systems.

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发光放大、复合非线性和温度对长波长激光二极管高速调制和混沌特性的影响

研究了长波长激光二极管对注入电流谐波调制的高速响应，并建立了模型。结果表明，增益、复合过程和发光放大的固有非线性对高速激光的动力学特性有显著影响。放大发光的描述基于空间分布模型。增加电流调制幅度会产生非谐波输出响应，其形式很大程度上取决于调制频率的值。在一定频率范围内，激光二极管输出呈现类谐波响应，且平均电流越大，谐波响应畸变越快。结果表明，温度升高会使激光器的调制特性发生畸变。因此，长波长激光二极管的固有非线性和温度可能会产生和控制复杂的激光动力学机制，包括那些用于激光编解码系统的机制。

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1999 Symposium on High Performance Electron Devices for Microwave and Optoelectronic Applications. EDMO (Cat. No.99TH8401)

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