Abstract
The infrared luminescence spectrum of the vibronic laser material with has been studied by Fourier transform spectroscopy under argon laser photoexcitation. With samples in a magnetic field (0–7T), effects of field configuration and strength on the luminescence were investigated and g‐factors were obtained. Other zero‐field luminescence results obtained include lifetime and effects of Co concentration, Ni impurity level, sample temperature (8–300 K), and pump laser power and wavelength (457.9–514.5 nm). The results provide a detailed understanding of the low lying electronic properties of the material, thus indicating the optimum conditions needed for laser operation. Since the data identifies a resonant energy transfer process between Ni2+ and Co2+ ions in this material, deliberate Ni doping in addition to Co would improve laser performance.
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