L-3 Applied Technologies, Inc., 10770 Wateridge Circle, San Diego, California, USA.
Electrical Engineering Department, University of California, Los Angeles, Los Angeles, California, USA.
Phys Rev Lett. 2014 Jan 17;112(2):023901. doi: 10.1103/PhysRevLett.112.023901. Epub 2014 Jan 14.
Limit-cycle oscillators are used to model a broad range of periodic nonlinear phenomena. Using the optically injected semiconductor laser as a paradigmatic example, we demonstrate that at specific operating points, the period-one oscillation frequency is simultaneously insensitive to multiple perturbation sources. In our system these include the temperature fluctuations experienced by the master and slave lasers as well as fluctuations in the bias current applied to the slave laser. Tuning of the oscillation frequency then depends only on the injected optical field amplitude. Experimental measurements are in detailed quantitative agreement with numerical modeling. These special operating points should prove valuable for developing ultrastable nonlinear oscillators, such as a narrow-linewidth, frequency-tunable photonic microwave oscillator.
限幅振荡器被用于模拟广泛的周期性非线性现象。我们以光注入半导体激光器为例，证明了在特定的工作点下，其单周期震荡频率对多种扰动源具有同时不敏感性。在我们的系统中，这些扰动源包括主激光器和从激光器所经历的温度波动以及施加在从激光器的偏置电流波动。而震荡频率的调谐则仅取决于注入光场的振幅。实验测量结果与数值模拟结果在细节上定量吻合。这些特殊的工作点对于开发超稳定的非线性振荡器非常有价值，例如窄线宽、频率可调谐的光子微波振荡器。
