Study of Compact Two-Mirror Yb3+:YAG Ring Laser
Date Issued
2008
Date
2008
Author(s)
Tsai, Pei-Song
Abstract
There are many merits of utilizing Yb3:YAG as laser gain medium for efficient operation and diode pumping, such as simple energy levels, no excited-state absorption, no upconversion , low quantum defect, broad absorption bandwidth, broad emission bandwidth, and long upper-state lifetime. Two identical spherical mirrors form the ring cavity which is simple, tiny and easy for alignment. With the advantages of Yb3:YAG and two-mirror ring cavity, and based on our previous effort on the two-mirror ring laser research, the initial research and evaluation of future development are accomplished. In experiment, a non-planar-8 laser path is achieved in a two-mirror ring cavity which is as small as 1.47 cm3 in volume and composed of two .7.63 mm radius-of-curvature spherical surfaces. In simulation, softwares are utilized to analyze the pumping beam size for mode matching and to simulate the laser path in cavity. In addition to the symmetric two-mirror ring cavity, asymmetric and paraboloidal structures are proposed and analyzed. The ultimate goal of two-mirror ring laser project is alignment-free two mirror ring laser. Based on the present experimental results, and theoretical analyses, a reasonable evaluation for alignment free laser is given.
Subjects
two-mirror
ring laser
Yb:YAG
Type
thesis
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