Abstract
Single-frequency lasers are desirable for many applications such as fiber-optic communications, coherent laser radar, and fiber-optic gyroscopes. Diode-pumped microchip single-frequency lasers are efficient, compact, and simple to fabricate.1 We report here on a single-frequency, diode- pumped microchip laser fabricated from a new host crystal with a high stimulated emission cross section: neodymium-doped lanthanum oxysulfide (La2O2S:Nd, 1%). The measured value of the cross section for π-polarized light is 20 × 10−19 cm2, five times larger than that of YAG:Nd, and agrees with earlier data reported by Alves et al.2
© 1993 Optical Society of America
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