Mechanical and optical properties of AFB YAG//YAG composites for waveguide lasers

Huai-Chuan Lee; Helmuth Meissner; Xiaodong Mu

doi:10.1117/12.851517

4 May 2010 Mechanical and optical properties of AFB YAG//YAG composites for waveguide lasers

Huai-Chuan Lee, Helmuth Meissner, Xiaodong Mu

Proceedings Volume 7686, Laser Technology for Defense and Security VI; 76860Z (2010) https://doi.org/10.1117/12.851517
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

We report on the fracture toughness as it is related to the fracture strength when different orientations of YAG single crystals are bonded to each other to make a selection of a mechanically desirable waveguide configuration. We have found that the K^IC (211//211) conforming twin is greater than K_IC (110//110) conforming twin that is about the same as K_IC of (111//111) twist 180° and flip 180° twins. All K_IC converge to the same value that is comparable if not greater than the non-composite counterparts¹ when the composite samples are fabricated using the standard AFB^R (Adhesive- Free Bond) process. A second equally important consideration is the refractive index difference as function of dopant concentration. We have developed a technique to measure the difference of refractive index between Er:YAG and undoped YAG, and between Nd:YAG, and undoped YAG. We have found that the specific refractive index variation for YAG is 4.22 × 10^-4 per 1% Nd dopant concentration, and is 2.08 × 10^-4 per 1% Er dopant concentration.

Citation Download Citation

Huai-Chuan Lee, Helmuth Meissner, and Xiaodong Mu "Mechanical and optical properties of AFB YAG//YAG composites for waveguide lasers", Proc. SPIE 7686, Laser Technology for Defense and Security VI, 76860Z (4 May 2010); https://doi.org/10.1117/12.851517

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