Galiev R R, Pavlov N G, Kondratiev N M, Koptyaev S, Lobanov V E, Voloshin A S, Gorodnitskiy A S, Gorodetsky M L
Opt Express. 2018 Nov 12;26(23):30509-30522. doi: 10.1364/OE.26.030509.
We present a novel method allowing high-power single-frequency emission with sub-kHz linewidth from a compact multi-frequency diode laser locked to high-Q optical microresonator. Using high-Q MgFmicroresonator and multi-frequency diode laser operating at 1535 nm with the output power of 100 mW and an emission spectrum consisting of approximately 50 lines with MHz linewidth, we observed a spectrum collapse to a single line or several lines with a sub-kHz linewidth and output power power of 50 mW. The Bogatov effect predicted more than 30 years ago was observed and studied in the spectrum of the locked laser. For analysis of the considered effect, original theoretical model taking into account self-injection locking effect, mode competition and Bogatov asymmetric mode interaction was developed and numerical modeling was performed. All numerical results are in a good agreement with our experimental data. Accurate analytical estimations for the parameters critical for the considered effect were obtained. The proposed method may be applied for different types of diode lasers operating in different spectral ranges.
我们提出了一种新颖的方法，可使紧凑型多频二极管激光器在锁定到高Q值光学微谐振器时实现具有亚千赫兹线宽的高功率单频发射。使用高Q值MgF微谐振器和工作在1535nm、输出功率为100mW且发射光谱由约50条具有兆赫兹线宽的谱线组成的多频二极管激光器，我们观察到光谱坍缩为一条或几条具有亚千赫兹线宽且输出功率为50mW的谱线。在锁定激光器的光谱中观察并研究了30多年前预测的博加托夫效应。为了分析所考虑的效应，开发了考虑自注入锁定效应、模式竞争和博加托夫不对称模式相互作用的原始理论模型并进行了数值模拟。所有数值结果与我们的实验数据吻合良好。获得了对所考虑效应至关重要的参数的精确分析估计。所提出的方法可应用于在不同光谱范围内工作的不同类型的二极管激光器。
