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增益腔模大失配型垂直外腔面发射激光器侧向激射抑制

openalex(2023)

Cited 0|Views46
Abstract
垂直外腔面发射激光器(Vertical external cavity surface emitting laser,VECSEL)的侧向激射是制约其高性能工作的关键。我们设计了室温下量子阱增益峰与表面腔模大失配(30 nm)的增益芯片结构,并证实该结构可以有效抑制泵浦功率增加时VECSEL的侧向激射增强问题。增益芯片基底温度为20℃时,VECSEL正向激射波长位于980 nm,侧向激射波长位于950 nm,当泵浦功率逐步增加时,侧向激射强度随着正向激射的出现而迅速降低。这是因为激光正向激射时量子阱的受激辐射能级与正向激射激光模式匹配,正向激射的激光模式可以获取更高的模式增益,在与侧向模式的竞争中处于优势地位。当基底温度控制在0℃与10℃时,量子阱本征增益峰值与表面腔模失配度增大,此时VECSEL仍然表现出稳定的侧向激射抑制效果。
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Vertical-Cavity Surface-Emitting Lasers (VCSELs),Laser Oscillation,Passively Mode-Locked Lasers,Semiconductor Lasers,Raman Lasers
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