13 GHz direct modulation of terahertz quantum cascade lasers
13 GHz direct modulation of terahertz quantum cascade lasers
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DOI：
10.1063/1.2790827
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发表时间：
2007-10-01
影响因子：
4
通讯作者：
Ritchie, David A.
中科院分区：
文献类型：
--
作者：
Barbieri, Stefano;Maineult, Wilfried;Ritchie, David A.
通过直接调制双金属波导2.8 THz量子级联激光器的偏置电压，我们观察到发射光谱中出现多个千兆赫兹边带，其间隔可连续调谐至13 GHz。通过使用上转换技术，太赫兹光谱偏移 1.57 μm，并显示在光谱分析仪上。当调制频率接近往返频率（类似于 12.3 GHz）时，可以观察到边带数量显着增加。激光封装高频响应是使用微波整流技术测量的，并且受到键合线寄生电感的限制。 (c) 2007 年美国物理研究所。
By directly modulating the bias voltage of a double-metal waveguide, 2.8 THz quantum cascade laser, we observe the appearance of multiple gigahertz sidebands in the emission spectrum, with a spacing that can be continuously tuned up to 13 GHz. By using an upconversion technique, the terahertz spectrum is shifted at 1.57 mu m, and displayed on an optical spectrum analyzer. A marked increase in the number of sidebands is observed when the modulation frequency approaches the round-trip frequency (similar to 12.3 GHz). The laser packaging high frequency response has been measured using a microwave rectification technique, and is limited by the bond-wire parasitic inductance. (c) 2007 American Institute of Physics.