Low-Threshold, Transversely Excited NdP5O14 Laser.

摘要

The room-temperature lasing behavior of NdP5O14 (NdPP) transversely pumped at 0.58 micrometers wavelength by a CW dye laser in an excitation geometry simulating that of an LED or laser diode were measured. For a crystal 760 micrometers long, the lowest transverse threshold was 4 mW. From this threshold and a theoretical relationship between excitation efficiency and pump wavelength, we predict that a threshold of approximately 8.5 mW should be possible for excitation by an edge-emitting 0.8 micrometers wavelength LED. Using thin NdPP samples with reflecting back surfaces for better excitation efficiency should lower this threshold by approximately 60 percent, and give minimum optical-to-optical conversion efficiencies of approximately 3.5 percent.