减反膜外腔半导体激光器特性的研究

Experimental study on the properties of the AR-coated external cavity diode lasers

研究了镀减反膜GaAs半导体激光器在Littrow式外腔结构中的输出特性.采用电流补偿技术,得到了约30GHz的连续无跳模调谐范围.利用外差拍探测技术获得激光器输出线宽约为120kHz.还研究了激光器的强度噪声分别随着电流与波长变化的特点并对此进行了分析.该类激光器可以广泛应用在冷原子物理、激光光谱以及量子光学等许多领域.

The properties of the Anti-Reflection coated（AR-coated） GaAs diode lasers are investigated systematically in Littrow configuration.The tuning range of about 30 GHz is obtained without any mode-hops by the current compensation technique.Using a heterodyne detection technique,the linewidth of the AR-coated ECDL is measured,which is about 120 kHz.We also investigate the intensity noise of the AR-coated ECDL as a function of the current and the wavelength.The relations between the intensity noise of the ECDL and the driving current and wavelength are obtained and analyzed.This laser system can be used in many areas,such as atomic physics,laser spectroscopy and quantum optics,etc.