Active zone of the VCSEL-SA and field intensities at the cavity resonance (black, divided by 400) and at the pump wavelengths (in red, between 795 nm and 805 nm) versus the growth depth. The active zone is composed of two regions (in yellow and green): the SA region (yellow) with one quantum well and the amplifying region (green) with two quantum wells. The first few layers composing the the front and back mirrors is visible on the right and left respectively. of the active zone. Light grey: AlAs. Dark grey: . Note that the SA quantum well is at a node of the pump fields in the whole range of possible pump wavelength while being at an antinode of the field at cavity resonance. After [73].
