HALF-LEVEL MODULE WITH IMPROVED WELLING STABILITY

摘要

A pump laser diode for providing improved stability at various operating temperatures is disclosed. It includes a Fabry-Perot cavity formed by laser facets. Bragg Gratings or Fiber Bragg Gratings (FBG) in a pump module are provided, wherein the optical mirror losses are made to increase for wavelengths longer than the required emission wavelength, thus permitting the diode to be locked to an emission wavelength while operating at different temperatures. A stack of materials with different refractive indices is deposited on the back facet of the laser diode to achieve a change in optical mirror losses over longer wavelengths.