Design and Manufacture of a Solid State Laser with Tunable Range from 1.3mum to 1.6mum

可调范围1.3mum至1.6mum固体激光器的设计与制造

• 批准号: 05559007
• 负责人: MINAMI Fujio
• 金额: $ 5.25万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05559007/
• 关键词: Cr^<4+> : YAG; tunable laser; 2photon resonance; GaAs; AlGaAs; quantum well; 半導体超格子; InGaAsP

In order to design a solid state Cr : YAG laser with 1.3-1.6 mum tuning range, we first constructed a Ti : sapphire laser system. Using an optimized Ti : sapphire laser and two-photon spectroscopy, we investigated ZnSe thin films and quantum wells. As a result, it is found that SHG signals in these materials manifest themselves in two-photon resonance with 1S and 2P excitons. We also showed that 2P exciton state has a fine structure caused by the coupling between the exciton envelope and the total hole spin.Replacing a laser rod and mirrors, we made a Cr : YAG lase system pumped by Nd : YAG laser. At 8 W cw excitation, a tuning range from 1.38 mum to 1.58 mum was obtained and an average output power of 0.9 W was attained.Next we confirm the pulse operation of this laser system. When pumped by a 5 W Q-switched Nd : YAG laser operating 3kHz, the laser had an average output power of 150 mW,a pulse duration of 100 ns and a tuning range of 1.38-1.58 mum. Using this laser system, we investigated the resonance SHG effects in GaAs/AlGaAs quantum wells. We observed an enhancement of SHG which occurs when the twice the incident photon energy is resonant with the 1S exciton state.

为了设计具有1.3-1.6 Mum Tuning范围的固态CR：YAG激光器，我们首先构建了Ti：Sapphire激光系统。使用优化的Ti：蓝宝石激光和两光谱光谱，我们研究了Znse薄膜和量子井。结果，发现这些材料中的SHG信号以1s和2p激子的两光子共振表现出来。我们还表明，2P激子状态具有良好的结构，该结构是由激子信封与总孔旋转之间的耦合引起的。重新置换激光杆和镜子，我们制造了由ND：YAG LASER泵送的Cr：Yag Lase系统。在8 W CW激发时，获得了从1.38 MUM到1.58 MUM的调整范围，并且达到了0.9 W的平均输出功率。接下来，我们确认该激光系统的脉冲操作。当用5 W Q开关ND：YAG激光器操作3KHz时，激光的平均输出功率为150 MW，脉冲持续时间为100 ns，调谐范围为1.38-1.58 MUM。使用此激光系统，我们研究了GAAS/藻类量子井中的共振SHG效应。我们观察到SHG的增强，这是当入射光子能与1s激子状态共鸣时发生的。

项目成果

F.Minami: "Two-Photon spectroscopy in ZnSe/ZnS quantum wells" J.Cryst.Growth. 138. 796-799 (1994)

F.Minami：“ZnSe/ZnS 量子阱中的双光子光谱”J.Cryst.Growth。

T. Kuroda: "Subpicosecond Excitonic Coherence Emission ina II-VI Superlattice Observed by Transient Reflectance Spectroscopy" Proc. 22nd Int. Conf. of Semicond. Phys.1388-1391 (1995)

T. Kuroda：“瞬态反射光谱观察到的 II-VI 超晶格中的亚皮秒激子相干发射”Proc。

南不二雄: "GaAs/AlAs超格子の電子構造とその圧力依存性" 高圧力の科学と技術. 3. 227-234 (1994)

Fujio Minami：“GaAs/AlAs 超晶格的电子结构及其压力依赖性”《高压科学与技术》3. 227-234 (1994)。

F.Minami: ""Resonant second harmonic generation in semiconductors"" Butsuri Gakkaisi. 50in press. (1995)

F.Minami：“半导体中的谐振二次谐波产生”Butsuri Gakkaisi。

F.Minami: "Pressure-induced type 1-typeII crossover in AlAs/GaAs short-period superlattices" Jpn.J.Appl.Phys.32. 70-74 (1993)

F.Minami：“AlAs/GaAs 短周期超晶格中压力诱导的 1 型-II 型交叉”Jpn.J.Appl.Phys.32。