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arXiv 1012.3866physics.optics
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用分立模半导体激光器实现太赫兹和毫米波频率的光学合成

Optical Synthesis of Terahertz and Millimeter-Wave Frequencies with Discrete Mode Diode Lasers

Stephen O'Brien, Simon Osborne, David Bitauld, Nicola Brandonisio, Andreas Amann, Richard Phelan, Brian Kelly, James O'Gorman

摘要:

结果表明,太赫兹和毫米波频率的光学合成可以实现使用双模和锁模分立模二极管激光器。这些边缘发射器件结合了根据激光器所需的光谱输出而设计的空间变化的折射率分布。我们首先展示了一个设备,支持两个主要模式同时具有高光谱纯度。在这种情况下,可以获得太赫兹频率下的光强度的正弦调制。在量子阱激光器中,材料增益的交叉饱和阻止了在毫米波区域中具有间距的两个模式的同时激射。最后,我们表明,通过锁模的设备,被设计为支持一组最小的四个主要模式,我们得到了在这个频率区域的光强度的正弦调制。

英文摘要:

It is shown that optical synthesis of terahertz and millimeter-wave frequencies can be achieved using two-mode and mode-locked discrete mode diode lasers. These edge-emitting devices incorporate a spatially varying refractive index profile which is designed according to the spectral output desired of the laser. We first demonstrate a device which supports two primary modes simultaneously with high spectral purity. In this case sinusoidal modulation of the optical intensity at terahertz frequencies can be obtained. Cross saturation of the material gain in quantum well lasers prevents simultaneous lasing of two modes with spacings in the millimeter-wave region. We show finally that by mode-locking of devices that are designed to support a minimal set of four primary modes, we obtain a sinusoidal modulation of the optical intensity in this frequency region.

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