US Patent No. 7,529,281, titled “Light source with precisely controlled wavelength-converted average power,” has been awarded to Mobius Photonics Inc. of Santa Clara, Calif., a commercial fiber-based laser source provider for the visible and ultraviolet regions. The innovation protected by the patent enables the company to control wavelength-converted pulse energy and average power, achieved through control of the wavelength conversion efficiency. It is useful in fiber master oscillator power amplifier systems where the IR fundamental wavelength is converted to green or UV wavelengths.