Analog and digital high-speed modulation of quantum cascade laser
Analog and digital high-speed modulation of quantum cascade laser
复制标题
量子级联激光器的模拟和数字高速调制
DOI：
10.1117/12.480193
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
H. Liu
中科院分区：
文献类型：
--
作者：
R. Martini;C. Gmachl;R. Paiella;F. Capasso;C. Glazowski;R. Murawski;E. Whittaker;C. Bethea;H. Hwang;D. Sivco;J. Baillargeon;A. Cho;H. Liu
在本文中，我们介绍了高达 10 GHz 的量子级联激光器 (QCL) 的测量调制响应。获得的调制响应在整个频率范围内显示出平坦的响应，证明了这些设备的宽带能力。更引人注目的是不存在强共振峰，这表明不存在弛豫振荡，而弛豫振荡通常限制标准二极管激光器的高速性能。此属性对于将这些设备用作高速数据源非常有吸引力，特别是在线性度很重要的应用中。为了解决这种可能的应用，这些器件的数字调制特性在低温冷却 QCL 的 2.5 GBit/s 标准误码率测量中进行了测试，显示了 QCL 在数字和模拟电信应用中的适用性。此外，我们还展示了最新的数据，显示了 QCL 在室温附近的脉冲模式操作中获得的误码测量和眼图。
In this paper we present measured modulation responses on quantum-cascade lasers (QCL) up to 10 GHz. The obtained modulation response shows a flat response over the whole frequency range, proving the broadband capabilities of these devices. Even more striking is the absence of a strong resonance peak, which demonstrates the absence of relaxation oscillations, a feature which often limits the high speed performance of standard diode lasers. This property is quite attractive for use of these devices as high-speed data sources, particularly in applications where linearity is important. To address this possible application, the digital modulation properties of these devices were tested in a standard bit-error-rate-measurement at 2.5 GBit/s for cryogenically cooled QCL, showing the suitability of QCLs in digital as well as analog telecommunication application. In addition we present recent data showing bit error measurements and eye diagrams obtained for the pulsed mode operation of QCL near room-temperature.