Diode Pumped Er:LiYF 4 Cw Laser At 2.8 µm With 10% Slope Efficiency

6 July 1989

proceedings article
Published by SPIE-Intl Soc Optical Eng

Vol. 1040, 99-102
https://doi.org/10.1117/12.951174

Abstract

Highly efficient diode pumped solid state lasers at room temperature operating near the peak of the water absorption near 3 μm have many potential medical applications.' An excellent candidate for this type of laser is the 2.8 μm ⁴I_11/2 → ⁴I_13/2 laser Er:LiYF₄ (YLF). Laser diode pumping of an 8% Er:YLF sample producing continuous-wave laser emission at 2.8 μm was previously reported with a 0.7% slope efficiency and an absorbed power threshold of 60 mW.² In our current work we demonstrate a greatly reduced threshold for CW laser emission, 20 mW, and more than an order of magnitude increase in slope efficiency, 10%, in a 30% Er:YLF sample.

Keywords

DIODES
LASERS
SEMICONDUCTOR LASERS
WATER
ABSORPTION
CONTINUOUS WAVE OPERATION
DIODE PUMPED SOLID STATE LASERS

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