Laser Emission from Diode-Pumped Nd:YAG Waveguides, Realized by Direct Femtosecond-Laser Writing Technique

Two-wall type and cylindrical-shaped depressed cladding waveguides were realized in Nd:YAG by direct writing with a femtosecond laser. Efficient laser emission at 1.06 and 1.32 μm is demonstrated under the pump with fiber-coupled diode laser.