Is there a linewidth theory for semiconductor lasers. Theory of the linewidth of semiconductor lasers abstract. Spectral linewidth in microcavity surfaceemitting lasers deep blue. Collins, measurements of the semiconductor laser linewidth broadening factor. Theory of the linewidth of semiconductor lasers ieee journals. Zeiger, theory of the effect of traps on the spectral characteristics of diode lasers, appl. A theory of the spectral width of a singlemode semiconductor laser is presented and used to explain the recent measurements of fleming and mooradian on al. Henry, theory of spontaneous emission noise in open. The theory of lasers has been developed in section 1.
Theory of the linewidth of semiconductor lasers ieee xplore. Pdf linewidth evolution in semiconductor lasers throughout. The densitymatrix theory of semiconductor lasers with relaxation broadening model is finally established by introducing theoretical dipole moment into previously developed treatments. Osa large linewidth reduction in semiconductor lasers. With a new generation of quantum dot qd optical gain material comprising atomlike features, the fundamental spectral characteristics of laser emission have been improved significantly. Introduction laser linewidth theory was pioneered by schawlow and townes 1 and further developed in 2. Quantitative test of general theories of the intrinsic laser linewidth. Abstracta theory of the spectral width of a singlemode semicon ductor laser is. Theory of the linewidth of semiconductor lasers nasaads. A theory of the spectral width of a singlemode semiconductor laser is presented and used to explain the recent measurements of fleming and mooradian on algaas lasers.
Linewidth of an optically injected semiconductor laser. They found the linewidth to be inversely proportional to power and to have a value of 114 mhz at 1 mw per facet. Theory of the linewidth of semiconductor lasers ieee. We describe the spectral and power characteristics of continuous wave cw singlemode inasalgainasinp qd distributed feedback lasers operating at 1. Pdf a detailed experimental and theoretical investigation on the evolution of linewidth avi function of injection current for. In semiconductor optical amplifiers soas, photons multiplied via stimulated emission. Spectral linewidth of semiconductor lasers springerlink. The advantages in comparisons with two separate lasers use of a single expensive laser diode with ar coated surfaces, low pumping, high efficiency, and natural output in a single beam and the.