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We present a continuous-wave, 810 nm laser with watt-level powers. Our systemis based on difference-frequency generation of 532 nm and 1550 nm fiber lasersin a single pass through periodically poled lithium niobate (PPLN). We measurethe broadband spectral noise and residual intensity noise to be compatible withoff-resonant dipole trapping of ultracold atoms. Given the large bandwidth ofthe fiber amplifiers, the output can be optimized for a range of wavelengths,including the strontium clock-magic wavelength of 813 nm. Furthermore, with theexploration of more appropriate nonlinear crystals, we believe there is a pathtoward scaling this proof-of-principle design to many watts of power, and thatthis approach could provide a robust, rack-mountable trapping-laser for futureuse in strontium-based optical clocks.

High-Power, Fiber-Laser-Based Source for Magic-Wavelength Trapping in Neutral-Atom Optical Clocks