Henry, theory of spontaneous emission noise in open. Pdf a detailed experimental and theoretical investigation on the evolution of linewidth avi function of injection current for. Spectral linewidth of semiconductor lasers springerlink. Abstracta theory of the spectral width of a singlemode semicon ductor laser is. Theory of the linewidth of semiconductor lasers ieee xplore. Quantitative test of general theories of the intrinsic laser linewidth. The densitymatrix theory of semiconductor lasers with relaxation broadening model is finally established by introducing theoretical dipole moment into previously developed treatments. Henry stlh theory of laser linewidth in the instance of semiconductor injection lasers. Theory of the linewidth of semiconductor lasers abstract. Osa large linewidth reduction in semiconductor lasers.
Is there a linewidth theory for semiconductor lasers. Zeiger, theory of the effect of traps on the spectral characteristics of diode lasers, appl. In semiconductor optical amplifiers soas, photons multiplied via stimulated emission. The theory of lasers has been developed in section 1. Theory of the linewidth of semiconductor lasers ieee journals.
They found the linewidth to be inversely proportional to power and to have a value of 114 mhz at 1 mw per facet. 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. The semiconductor diode laser sl has a number of properties that make it a desirable light. Theory of the linewidth of semiconductor lasers nasaads. Linewidth of an optically injected semiconductor laser. Thus, the theory of natural linewidth is an integral part of the nonlinear theory on the basis of which the output power, linewidth, and threshold current for fabryperot semiconductor lasers are. We describe the spectral and power characteristics of continuous wave cw singlemode inasalgainasinp qd distributed feedback lasers operating at 1. In soas photons were confined in the dimensions transverse to the waveguide but were allowed to escape from the. Pdf linewidth evolution in semiconductor lasers throughout. Download pdf download citation view references email request permissions. To understand the intensity noise and the laser linewidth the. Henry, theory of the linewidth of semiconductorlasers, ieee j. 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. 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.
Collins, measurements of the semiconductor laser linewidth broadening factor. Theory of the linewidth of semiconductor lasers ieee. Introduction laser linewidth theory was pioneered by schawlow and townes 1 and further developed in 2. Spectral linewidth in microcavity surfaceemitting lasers deep blue. 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.