Читать книгу Continuous Emission Monitoring - James A. Jahnke - Страница 136

Interband cascade lasers (ICLs) operate in the wavelength range of 3–6 μm and fill the gap in wavelengths emitted between tunable diode lasers and quantum cascade lasers. ICLs are similar to quantum cascade lasers; however, in ICLs, light is emitted from electron–hole recombination in interband transitions rather than in intersubband transitions. In a sense, ICLs are a hybrid between tunable diode lasers and quantum cascade lasers, in that light is emitted by electron–hole recombination from electron injection. Due to the nature of these transitions, light emission can occur at lower electrical input power than in quantum cascade lasers.