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The neutral nitrogen‐vacancy (NV0) defects in diamond are photostable color centers, suitable for a wide range of applications in science and engineering. However, the photophysical properties of the centers have not yet been fully characterized. This work measured the stimulated emission cross sections of NV0 in a single‐crystal diamond by two‐photon excitation of its matrix at 344 nm. From the measured...
A tunable and low-threshold laser-diode-pumped Ti:sapphire crystal fiber laser was achieved using a glass-clad 18-μm-diameter crystalline core as the gain medium. The tuning range was 149 nm with a threshold pump power of 106 mW.
Glass-clad Ti:sapphire crystal fibers were grown using the co-drawing laser-heated pedestal growth method. A laser threshold of less than 100 mW was achieved at room temperature with an a-cut-core diameter as small as 18 μm.
Doped single crystalline fibers are efficient and broadband gain media for lasers, as well as cw and high-brightness emissions. Various crystal fibers based broadband tunable laser and emissions centered from blue to near infrared will be addressed. A Cr4+:YAG crystal fiber laser tunable from 1353 to 1509 nm with a threshold pump power of 70 mW will be discussed as an example.
Doped single crystalline fibers (note: not the photonic crystal fiber) are efficient to emit cw and high-brightness broadband light. Various crystal fibers based broadband emissions and lasers centered from blue to near infrared will be discussed.
Glass-clad Cr4+:YSO crystal fibers were grown using the laser-heated pedestal growth method. Quasi-3-level behavior of the Cr4+:YSO was observed, and the emission was red shifted to 1302 nm with a 3-dB bandwidth of 230 nm.
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