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Femtosecond Laser-Written Waveguides in a Bismuth Germanate Single Crystal |
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| Authors: | QIAN Bin LIAO Yang DONG Guo-Ping LUO Fang-Fang SU Liang-Bi SUN Sheng-Zhi QIU Jian-Rong |
| Affiliation: | State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800Graduate School of the Chinese Academy of Sciences, Beijing 100049Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027 |
| Abstract: | We demonstrate the fabrication of symmetric waveguides in a bismuth germanate (BGO) single crystal using a double line approach by an 800nm femtosecond laser. The optical attenuation of the single mode waveguide is measured to be 4.2dB/cm at 633nm. The influence of pulse energy and focal depth on the end facet of the irradiated region is also studied. This technique is promising to fabricate buried BGO waveguide arrays used in positron emission tomography systems. |
| Keywords: | 06.60.Jn 42.79.-e 42.82.Et |
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