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The Effect of Fabrication on Birefringence of Cr4+:YAG Double-clad Crystal Fiber

Modal birefringence and stress distribution measurement in doubt-clad rare-earth-doped fibers are reported. For example, doubt ¡Vclad ytterbium-doped fiber and doubt ¡Vclad neodymium -doped fiber. In this paper, I am interested in the effect of fabrication on birefringence of Cr4+: YAG double-clad crystal fiber. A knowledge of stress distribution in the fiber would indicate the origin of birefringence.Since fiber birefringence can be produced by different mechanisms.For example,stress-induced birefringence,geometrical anisotropy of a non-circular fiber core and inner-cladding, intrinsic birefringence, fiber bending and twist.To understand the origin of birefringence, I have obtained the stress distribution pattern in Polarization Optical Microscopy.Using scanning wavelength method (Phase Retardation), I set-up the system successfully and measured the group modal birefringence of bulk:YVO4 crystal and Cr4+ :YAG double-clad crystal fiber. I also used Jones matrix, Mueller matrix,stress optics law, photoelastic
and mathematical formulas on the estimated modal birefringence to calculate the stress intensity distribution and interference light conditions and estimate the modal birefringence ,and then compared with other rare earth-doped fiber.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0804110-211723
Date04 August 2010
CreatorsHuang, Shin-wen
ContributorsChin-Ping Yu, Jan-Sheng Wang, Wood-Hi Cheng
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0804110-211723
Rightsnot_available, Copyright information available at source archive

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