Читать книгу VCSEL Industry - Babu Dayal Padullaparthi - Страница 24

The schematics of the edge‐ and surface‐emitting laser (VCSEL) are shown in Figure 1.8. The edge‐emitting (EE) laser, shown in Figure 1.8(a), includes Fabry‐Pérot (FP) laser, distributed feedback (DFB) laser, and distributed Bragg reflector (DBR) laser. These laser types will be compared with VCSEL in Figure 1.8b in subsequent chapters.

Let us consider the oscillation conditions of a semiconductor laser. As shown in Figure 1.8(a) and (b), the target semiconductor laser is composed of a Fabry‐Pérot (FP) cavity. Both resonators are generalized in Figure 1.9(a). By using the field reflectance including phase shift, which will be given later, this model can be applied to edge‐emitting Fabry‐Pérot lasers, DFB lasers, DBR lasers, and VCSELs as well.

Figure 1.8 Schematic of edge‐emitting Fabry‐Pérot lasers and VCSELs. The coupling of light through standing waves in laser resonators (a) Fabry‐Pérot (edge‐emitting laser/EEL), and (b) surface emitting laser (VCSEL).

Source: Figure by K. Iga and B. D. Padullaparthi [copyright reserved by authors].

Figure 1.9 Fabry‐Pérot cavity and resonant spectra. (a) Fabry‐Pérot cavity. (b) Resonant spectra.