Low-loss propagation in Cr4+:YAG double-clad crystal fiber fabricated by sapphire tube assisted CDLHPG technique
Resource
Optics Express 16 (16): 12264-12271
Journal
Optics Express
Journal Volume
16
Journal Issue
16
Pages
12264-12271
Date Issued
2008
Author(s)
Abstract
Cr4+: YAG double-clad crystal fiber with an uniform 10-μm core was fabricated by using a sapphire tube as a heat capacitor to stabilize the power fluctuation of the CO2 laser in the co-drawing laser-heated pedestal growth system. The uniformity of the fiber core showed a factor of 3 improvement compared to that without the use of sapphire tube. The variation of the core diameter is within the ±1.35-degree adiabatic criterion and has a autocorrelation length of 1.7 mm. The measured propagation loss is only 0.02 dB/cm. The sapphire tube also reduces the vertical temperature gradient during the crystal fiber growth process so the 10-nm crystal core exhibits a smooth perimeter. The sapphire tube assisted system can be applied to the growth of many other optical crystal materials. © 2008 Optical Society of America.
Other Subjects
Carbon dioxide; Crystal whiskers; Fibers; Tubes (components); Adiabatic criterion; Autocorrelation length; Core diameters; Laser heated pedestal growth; Optical crystals; Power fluctuations; Propagation loss; Vertical temperature gradients; Sapphire; aluminum oxide; chromium; article; chemistry; computer aided design; computer simulation; crystallization; equipment; equipment design; fiber optics; instrumentation; methodology; radiation scattering; solid state laser; theoretical model; Aluminum Oxide; Chromium; Computer Simulation; Computer-Aided Design; Crystallization; Equipment Design; Equipment Failure Analysis; Fiber Optics; Lasers, Solid-State; Models, Theoretical; Scattering, Radiation
Type
journal article
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