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.

为了设计调谐范围为1.3-1.6 μ m的Cr：YAG固体激光器，我们首先构建了钛宝石激光器系统。利用优化的钛宝石激光器和双光子光谱，我们研究了ZnSe薄膜和量子威尔斯。结果发现，这些材料中的SHG信号表现为与1 S和2 P激子的双光子共振。我们还证明了2 P激子态具有精细结构，这是激子包络与空穴总自旋耦合的结果。我们用Nd：YAG激光器代替激光棒和反射镜，制作了Cr：YAG激光系统。在8 W连续波激励下，获得了1.38 ~ 1.58 μ m的调谐范围和0.9W的平均输出功率。当用5 W的调Q Nd：YAG激光器抽运时，平均输出功率为150 mW，脉宽为100 ns，调谐范围为1.38-1.58 μ m。利用该激光系统，我们研究了GaAs/AlGaAs量子阱威尔斯中的共振倍频效应。我们观察到当两倍的入射光子能量与1 S激子态共振时，二次谐波的增强。

项目成果

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。

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。

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。

T. Kuroda: "Excitonic structures in II-VI superlattices observed by Brewster-angle reflectance spectroscopy" J. Appl. Phys.76. 533-536 (1994)

T. Kuroda：“通过布鲁斯特角反射光谱观察到 II-VI 超晶格中的激子结构” J. Appl。