Abstract: A source, system and method for generating amplified stimulated emission is provided. The source includes a pump source for generating a pump light which is provided to a doped element, such as a doped fiber. Based on the pump light, the doped fiber, which may be a erbium doped fiber, generates the amplified stimulated emission. A coupler mechanism provides the pump light to the doped fiber and transmits the amplified stimulated emission from the doped fiber. The coupler mechanism isolates the pump light and the amplified stimulated emission using phase conditions. A system is also provided including a source and a sensor, such as a fiber optic gyroscope. A method for generating the amplified stimulated emission is further provided.

Abstract: A wavelength stabilized light source is constructed using a lasing element such as a laser diode which generates light that is substantially polarized. This light is conducted through a polarization maintaining optic fiber to a Bragg grating which reflects a portion of the light back to the laser diode forming a virtual laser cavity and stabilizing the wavelength of the laser diode light output over time and a broad range of temperature and drive circuit conditions. To produce a broad band light source, the laser diode light is used to pump an erbium doped fiber. The wavelength stabilized light source can be used in fiber optic gyroscopes as well as in other applications that require a light source with a very stable wavelength.