Ultrafast laser-written dual-wavelength waveguide laser

We report the performance of a dual-wavelength waveguide laser based on a phase-modulated sampled-grating architecture fabricated using the femtosecond laser direct-write technique. The waveguide laser was written in Yb-doped phosphate glass and had a narrow linewidth (60 dB), 5 mW output power per channel, and wavelength separation of 10 nm.3 page(s