中间镜式半导体可饱和吸收镜实现Nd:YVO_4被动锁模

中国科学院半导体研究所光电子器件国家工程研究中心研究成功新型中间镜类型的1μm波长半导体可饱和吸收镜，在清华大学精密测试技术及仪器实验室成功地实现了Nd

用表面态型半导体可饱和吸收镜实现Yb∶YAG激光器被动调Q锁模

制作了一种新型的半导体可饱和吸收镜--表面态型半导体可饱和吸收镜.用表面态型半导体可饱和吸收镜作为被动锁模吸收体实现了半导体端面泵浦Yb∶YAG激光器被动调Q锁模.在泵浦功率仅有1.4 W的情况下,获得了调Q锁模脉冲序列,锁模平均输出功率1 mW,锁模脉冲重复频率200 MHz.

Passive Q-switching of diode-pumped Yb:YAG microchip laser with ion-implanted GaAs

We reported a passive Q-switched diode laser pumped Yb:YAG microchip laser with an ion-implanted semi-insulating GaAs wafer. The wafer was implanted with 400-keV As^(+) in the concentration of 10^(16) ions/cm^(2). To decrease the non-saturable loss, we annealed the ion-implanted GaAs at 500 oC for 5 minutes and coated both sides of the ion-implanted GaAs with antireflection (AR) and highreflection (HR) films, respectively. Using GaAs wafer as an absorber and an output coupler, we obtained 52-ns pulse duration of single pulse.

表面态型半导体可饱和吸收镜实现Yb:YAG激光器被动锁模

制作了一种新型的半导体可饱和吸收镜:表面态型半导体可饱和吸收镜.用表面态型半导体可饱和吸收镜作为被动锁模吸收体,实现了半导体端面泵浦Yb:YAG激光器被动连续锁模.在泵浦功率为10W时,获得了连续锁模脉冲序列,重复频率200MHz,锁模脉冲平均输出功率为70mW.在未加任何色散补偿的情况下,脉冲宽度为4.35ps.

Stable mode-locking in an Yb:YAG laser with a fast SESAM

Stable mode-locking in a diode-pumped Yb:YAG laser was obtained with a very fast semiconductor saturable absorber mirror (SESAM). The pulse width was measured to be 4 ps at the central wavelength of 1047 nm. The average power was 200 mW and the repetition rate was 200 MHz.

半导体可饱和吸收镜自启动的Kerr锁模Cr~(4+)∶YAG激光器

采用传统的X型像散腔,利用一块精心设计的半导体可饱和吸收镜(SESAM)做启动元件,实现了自启动的Kerr锁模Cr4+∶YAG激光器.输出脉冲的最窄脉宽小于80 fs,脉冲重复频率为120 MHz,脉冲峰值功率可以达到100 W以上.

中国信息产业领域相关重点基础材料科技发展战略研究

介绍了中国信息产业领域相关的重点基础材料(包括Nd:YVO_4、YAG固体激光材料)的科技发展战略研究情况。

YAlO3：（Nd^3＋,Lu^3＋）单晶的各向异性吸收光谱

于2010-11-23批量导入

量子阱激光二极管泵浦Nd:YLF固体激光器的调Q

于2010-11-23批量导入

La,Ce及Nd稀土金属硅化物的生成

于2010-11-23批量导入

Fe-57 Mossbauer spectroscopic and magnetic studies of R3Fe29-xVx (R = Y, Ce, Nd, Sm, Gd, Tb, and Dy)

Mossbauer spectra for Fe atoms in the series of R3Fe29-xVx (R = Y, Ce, Nd, Sm, Gd, Tb, and Dy) compounds were collected at 4.2 K. The ratio of 14.5 T/mu(B) between the average hyperfine field B-hf and the average Fe magnetic moment mu(Fe)(MS), obtained from our data, in Y3Fe29-xVx is in agreement with that deduced from the RxTy alloys by Gubbens et al. The average Fe magnetic moments mu(Fe)(MS) in these compounds at 4.2 K, deduced from our Mossbauer spectroscopic studies, are in accord with the results of magnetization measurement. The average hyperfine field of the Fe sites for R3Fe29-xVx at 4.2 K increases with increasing values of the rare earth effective spin (g(J) - 1) J, which indicates that there exists a transferred spin polarization induced by the neighboring rare earth atom.

Mossbauer spectroscopy study of Fe-57 in R3Fe29-xTx (R=Y, Ce, Nd, Sm, Gd, Tb and Dy; T=V and Cr)

Fe-57 Mossbauer spectra for the Fe atoms in the R3Fe29-xTx (R=Y, Ce, Nd, Sm, Gd, Tb, Dy; T=V, Cr) compounds were collected at 4.2 K. The analysis of Mossbauer spectra was based on the results of magnetization and neutron powder diffraction measurements. The average Fe magnetic moments at 4.2 K, deduced from our data, are in accord with magnetization measurements. The average hyperfine field of Tb3Fe29-xCrx (x=1.0, 1.5, 2.0, and 3.0) decreases with increasing Cr concentration, which is also in accordance with the variation of the average Fe magnetic moment in the Tb3Fe29-xCrx compounds.

Crystallographic and magnetic properties of hydride R3Fe29-xTxHy (R=Y, Ce, Nd, Sm, Gd, Tb and Dy; T=V and Cr)

The crystallographic and intrinsic magnetic properties of hydride R3Fe29-xTxHy (R=Y, Ce, Nd, Sm, Gd, Tb, and Dy; T=V and Cr) have been investigated. The lattice constants and the unit cell volume of R3Fe29-xTxHy decrease with increasing R atomic number from Nd to Dy, except for Ce, reflecting the lanthanide contraction. Regular anisotropic expansions, mainly along the a- and b-axis rather than along the c-axis, are observed for all the compounds upon hydrogenation. Hydrogenation leads to an increase in Curie temperature. First-order magnetization processes (FOMP) occur in magnetic fields of around 1.5 T and 4.0 T at 4.2 K for Nd3Fe24.5Cr4.5H5.0 and Tb(3)Fc(27.0)Cr(2.0)H(2.8), and around 1.4 T at room temperature for Gd3Fe28.0Cr1.0H4.2 Abnormal crystallographic and magnetic properties of Ce3Fe29-xTxHy suggest that the Ce ion is non-triply ionized.