Hinkov Borislav, Beck Mattias, Gini Emilio, Faist Jérôme
Institute for Quantum Electronics, Swiss Federal Institute of Technology (ETH) Zürich, Wolfgang-Pauli-Strasse 16, 8093 Zürich, Switzerland.
Opt Express. 2013 Aug 12;21(16):19180-6. doi: 10.1364/OE.21.019180.
We present the design and realization of short-wavelength (λ = 4.53 μm) and buried-heterostructure quantum cascade lasers in a master oscillator power amplifier configuration. Watt-level, singlemode peak optical output power is demonstrated for typical non-tapered 4 μm wide and 5.25 mm long devices. Farfield measurements prove a symmetric, single transverse-mode emission in TM(00)-mode with typical divergences of 25° and 27° in and perpendicular to growth direction, respectively. We demonstrate singlemode tuning over a range of 7.9 cm(-1) for temperatures between 263K and 313K and also singlemode emission for different driving currents. The side mode suppression ratio is measured to be higher than 20 dB.
我们展示了主振荡功率放大器配置下短波长（λ = 4.53μm）掩埋异质结构量子级联激光器的设计与实现。对于典型的4μm宽、5.25mm长的非锥形器件，实现了瓦级单模峰值光输出功率。远场测量表明，在TM(00)模式下发射呈对称单横向模式，在生长方向和垂直于生长方向上的典型发散角分别为25°和27°。我们展示了在263K至313K温度范围内7.9cm⁻¹的单模调谐，以及不同驱动电流下的单模发射。测量得到的边模抑制比高于20dB。
