Optimized growth of high length-to-diameter ratio Lu₂O₃ single crystal fibers by the LHPG method

Abstract

Lu2O3 crystals have attracted intense attention due to their great potential in the field of high power solid-state lasers.

Growth of a Gradient-Doped Single-Crystal Rod with Designable Distribution of Doped Ions by a Laser-Heated Pedestal Growth Method

“…The detailed growth process and precautions of the LHPG method have been introduced in the literature. , Its main characteristic is that it can be grown without a crucible with only part of the region melted during the growth process. When the square bar is used as the source rod, the concentration distribution of ions in formula can be realized by further designing the square bar’s compositions.…”

Record size crystal growth and laser performance of Yb-doped lutetium oxide (Yb:Lu2O3) single crystal

“…Crystal utilization in solid-state lasers has garnered significant attention in recent decades due to its vital role in diverse fields, including information storage, communication, medical treatment, material processing, and the military. 1,2 The sesquioxide Lu 2 O 3 has emerged as a promising host material for laser applications due to its favorable properties such as a wide transmission band (0.225-8 μm), low maximum phonon energy (618 cm −1 ), high thermal conductivity (12.5 W mK −1 ), wide band gap (5.15 eV), and chemical stability, making it an excellent choice for a laser material, and has been extensively studied. 3,4 However, the high melting point (2450 °C) of Lu 2 O 3 presents a great challenge to its bulk growth.…”

Development of lutetium oxide continuous fibers with excellent mechanical properties

“…Through unremitting efforts, researchers have achieved many valuable research results in Lu 2 O 3 bulk single crystal [15,16], transparent ceramics [16,17], phosphors [18], etc. Compared with traditional material forms, fiber materials have more excellent application prospects in the fields of highenergy lasers due to their superb flexibility, higher laser damage threshold, and wider transmission band [19]. Currently, the research on Lu 2 O 3 fibers mainly focuses on single-crystal fibers.…”

“…Currently, the research on Lu 2 O 3 fibers mainly focuses on single-crystal fibers. The commonly used methods include the laser heating pedestal growth (LHPG) method and the micro-pull-down method [16,19,20]. However, the fibers produced by these methods have large diameters (> 100 μm) and poor flexibility.…”