InP基高功率短波长量子级联激光器设计

阐述了InP基高功率短波长量子级联激光器(QCL)的设计原理和设计方案。从有源区设计模型出发,介绍了器件的理想和实际载流子传输路径,进而指出有源区设计的发展趋势和方法。根据器件的发展进程,综述了双声子共振设计,非共振抽取式设计,超强耦合设计,深阱设计,浅阱设计,短注入区设计等先进设计方案,这些设计方案使得QCL在低温下的电光转换效率在50%以上,最大室温连续输出功率超过3 W,而器件的特征温度T₀和T₁的最大值分别达到383 K和645 K。针对量子级联激光器的短波长高功率提供的先进设计方案扩大了QCL在民用与军用领域的应用前景,该设计方案亦可为其它波段量子级联激光器实现室温高功率的设计提供借鉴。

Design of InP-based quantum cascade laser with high power and short wavelength

The design principles and design methods are introduced for a InP-based Quantum Cascade Laser(QCL) with high power and short wavelength. According to the described ideal and real carrier transition paths, the active region designing trends and approaches to enhance the efficiency of the QCL are also proposed. The most advanced design methods, such as two phonon resonance design, nonresonant extraction design, strong coupling design, deep well design, shallow well design and short injector design are reviewed, respectively. The characteristics and advantages of each design method are discussed. With these highly advanced design approaches, the Wall-plug Efficiency(WPE) of the short wavelength QCL exceeds 50% at low temperature and room temperature, continuous wave operation surpasses 3 W and the maximum T0 and T1 reach 383 K and 645 K, respectively. As the most advanced working region, high power, advanced design methods make QCL unlimited usage in both military and civilian fields. Moreover, they could also be served as the highly efficient bandstructure pioneer design methods for other working regions.