DBR Lasers at 679.29 and 707.20 nm for Efficient Repumping in Sr Optical Lattice Clocks

We have developed and characterized DBR lasers emitting at 679 nm and 707 nm, specifically tailored to excite the repumping wavelengths in Sr optical lattice clocks. They achieve a FWHM linewidth of about 1MHz at optical output powers of more than 65 mW.