Femtosecond-laser-encoded distributed-feedback color center laser in lithium fluoride single crystal
Femtosecond-laser-encoded distributed-feedback color center laser in lithium fluoride single crystal
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DOI：
10.1117/12.689536
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发表时间：
2004-01
期刊：
影响因子：
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通讯作者：
K. Kawamura;T. Kurobori;M. Hirano;H. Hosono
中科院分区：
文献类型：
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作者：
K. Kawamura;T. Kurobori;M. Hirano;H. Hosono
利用红外飞秒激光（波长约800 nm，发射脉宽100 fs）在LiF晶体中制备了光波导、微光栅和激光活性中心等光电子器件。fs激光辐照诱导了约2 × 1018 cm-3的F2色心和在633 nm处约1%的折射率变化。利用该技术在LiF单晶中制备了分布反馈F2色心激光器结构。LiF DFB激光器在室温下表现出707 nm的激光振荡。斜效率约为10%，光束发散角约为20 mrad。
Focused infrared femtosecond laser pulses (wavelength ~800 nm, emission pulse duration 100 fs) were employed to fabricate optoelectronic devices such as waveguides, micro-gratings and laser active centers in LiF crystals. F2 color centers of about 2x1018 cm-3 and refractive index change of about 1% at 633 nm were induced by the fs-laser irradiation. This technique was applied to fabricate a distributed-feedback (DFB) F2 color center laser structure inside LiF single crystal. The LiF DFB laser exhibited laser oscillation at 707 nm at room temperature. The slope efficiency of ~10% and beam divergence of ~20 mrad were achieved.