A Study on Yttrium Containing Fullerene YC＿（82） Using Laser Ablation Mass Spectroscopy

ＡＳｔｕｄｙｏｎＹｔｔｒｉｕｍＣｏｎｔａｉｎｉｎｇＦｕｌｌｅｒｅｎｅＹＣ＿（８２）ＵｓｉｎｇＬａｓｅｒＡｂｌａｔｉｏｎＭａｓｓＳｐｅｃｔｒｏｓｃｏｐｙ￥ＤＯＮＧＧｕｏｘｕａｎ；ＷＡＮＧＳｈｉｌｉａｎｇ；ＤＡＩＳｏｎｇｔａｏ；ＬＩＣｈｕｎｍｉｎｇ；ＣＨ...     

Laser Rapid Melting Structure and Property for Ni－based Tungsten Carbide Alloy

ＬａｓｅｒＲａｐｉｄＭｅｌｔｉｎｇＳｔｒｕｃｔｕｒｅａｎｄＰｒｏｐｅｒｔｙｆｏｒＮｉ－ｂａｓｅｄＴｕｎｇｓｔｅｎＣａｒｂｉｄｅＡｌｌｏｙ￥ＺＨＡＮＧＳｏｎｇ；ＫＡＮＧＹｕｐｉｎｇ；ＳＯＮＧＨｕａｎ，ＺＨＵＪｉｎｇｐｕ（ＳｈｅｎｙａｎｇＰｏｌｙｔｅｃｈ...     

Generation of 2－10ns Excimer Laser Pulse by Optical Synchronizing Wave－clipping

Ｇｅｎｅｒａｔｉｏｎｏｆ２－１０ｎｓＥｘｃｉｍｅｒＬａｓｅｒＰｕｌｓｅｂｙＯｐｔｉｃａｌＳｙｎｃｈｒｏｎｉｚｉｎｇＷａｖｅ－ｃｌｉｐｐｉｎｇＸＩＡＮＧＳｈｉｑｉｎｇ；ＬＯＵＱｉｈｏｎｇ；ＤＯＮＧＪｉｎｇｘｉｎｇ；ＭＡＮＧＹａｎｐｉｎｇ；ＷＥＩＹｕｎｒ...     

Two－Side Electron Beam Pumping System For Hundred－Joule－Level KrF Excimer Laser

Ｔｗｏ－ＳｉｄｅＥｌｅｃｔｒｏｎＢｅａｍＰｕｍｐｉｎｇＳｙｓｔｅｍＦｏｒＨｕｎｄｒｅｄ－Ｊｏｕｌｅ－ＬｅｖｅｌＫｒＦＥｘｃｉｍｅｒＬａｓｅｒ￥ＭＡＷｅｉｙｉ；ＳＨＡＮＹｕｓｈｅｎｇ；ＺＨＯＵＫｕｎｇｏｎｇ；ＷＡＮＧＹｏｕｔｉａｎ；ＺＨＡＮＧＤｏｎｇ；...     

The Experiment Study of Two Nd~（3＋）：p－glass Rods Laser with a Q－switch／mode－locking and Amplifier

ＴｈｅＥｘｐｅｒｉｍｅｎｔＳｔｕｄｙｏｆＴｗｏＮｄ￣（３＋）：ｐ－ｇｌａｓｓＲｏｄｓＬａｓｅｒｗｉｔｈａＱ－ｓｗｉｔｃｈ／ｍｏｄｅ－ｌｏｃｋｉｎｇａｎｄＡｍｐｌｉｆｉｅｒ￥ＲＥＮＺｈａｏｙｕ；ＺＨＵＡＮＧＤｏｕｎａｎ；ＬＥＩＳｈｉｚｈａｎ；ＹＵＧｕｉ...     

Soliton Transmission Using Actively Mode－locked Fiber Ring Laser at 2．5GHz and 5GHz

ＳｏｌｉｔｏｎＴｒａｎｓｍｉｓｓｉｏｎＵｓｉｎｇＡｃｔｉｖｅｌｙＭｏｄｅ－ｌｏｃｋｅｄＦｉｂｅｒＲｉｎｇＬａｓｅｒａｔ２．５ＧＨｚａｎｄ５ＧＨｚ￥ＺＨＯＮＧＳｈａｎ；ＬＯＵＣａｉｙｕｎ；ＬＩＵＪｕｎ；ＧＡＯＹｉｚｈｉ；ＺＨＯＵＢｉｎｇｋｕｎ（Ｄｅｐｔ...     

Generation of Stable Near－infrared and Violet Femtosecond Pulses from a Self－mode－locked Ti：Sapphire Laser

ＧｅｎｅｒａｔｉｏｎｏｆＳｔａｂｌｅＮｅａｒ－ｉｎｆｒａｒｅｄａｎｄＶｉｏｌｅｔＦｅｍｔｏｓｅｃｏｎｄＰｕｌｓｅｓｆｒｏｍａＳｅｌｆ－ｍｏｄｅ－ｌｏｃｋｅｄＴｉ：ＳａｐｐｈｉｒｅＬａｓｅｒ￥ＬＩＷｅｉｌｉａｎｇ；ＱＩＵＺｈｉｒｅｎ；ＰＥＮＧＷｅｎｊｉ...     

Diode-Pumped Monolithic Nd:LMA Laser

Ｄｉｏｄｅ－ＰｕｍｐｅｄＭｏｎｏｌｉｔｈｉｃＮｄ：ＬＭＡＬａｓｅｒ￥ＬＵＪｉａｎｇ；ＨＵＡＮＧＺｈａｏｍｉｎｇ；ＪＩＮＺｈｅｎｈｏｎｇ；ＷＡＮＧＹａｎｇｊｕｎ（ＯｐｔｉｃａｌＦｉｂｅｒＩｎｓｔｉｔｕｔｅ，，ＳｈａｎｇｈａｉＵｎｉｖｅｒｓｉｔｙｏｆＳｃ...     

Microstructure Evolution in Laser RS Co-base Metastable Alloy

ＭｉｃｒｏｓｔｒｕｃｔｕｒｅＥｖｏｌｕｔｉｏｎｉｎＬａｓｅｒＲＳＣｏ－ｂａｓｅＭｅｔａｓｔａｂｌｅＡｌｌｏｙＷＡＮＧＡｎａｎ；ＣＨＥＮＧＳｈｕｎｑｉ；ＧＵＯＺｈｉｙａｏ（ＫｕｎｍｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅｎｃｅａｎｄＴｅｃｈｎｏｌｏｇｙ，...     

Optical Measuring Method for Quality Monitoring Purpose in Laser Welding of Tin－plates

ＯｐｔｉｃａｌＭｅａｓｕｒｉｎｇＭｅｔｈｏｄｆｏｒＱｕａｌｉｔｙＭｏｎｉｔｏｒｉｎｇＰｕｒｐｏｓｅｉｎＬａｓｅｒＷｅｌｄｉｎｇｏｆＴｉｎ－ｐｌａｔｅｓ￥ＬＵＯＨｏｎｇ；ＨＵＬｕｎｊｉ；ＨＵＡＮＧＳｈｕｈｕａｉ；ＬＩＺｈｉｙｕａｎ；ＨＵＸｉｙｕａｎ（Ｈ...     

激光二极管泵浦高效Nd∶YVO_4／KTP腔内倍频激光器

报道了激光二极管泵浦的高转换效率Ｎｄ∶ＹＶＯ４／ＫＴＰ腔内倍频激光器。研究了泵浦光斑尺寸、谐振腔长、ＫＴＰ及Ｎｄ∶ＹＶＯ４的温度对输出绿光效率的影响。在输入泵浦功率为６６９ｍＷ时，获得绿光输出功率１５４ｍＷ，光－光转换效率达２３％。     

激光二极管直接耦合泵浦的高效率Nd：YVO4／KTP腔内倍频激光器

使激光二极管的发光光面紧贴Ｎｄ：ＹＶＯ４激光晶体，“面对面”直接耦合泵浦，采用ＫＴＰ晶体腔内倍频，在５０３ｍＷ的泵浦功率下，获得５３２ｎｍ基横模绿光输出约７３ｍＷ，光光总体转换效率为１４．５％。     

A Single-Longitudinal-Mode Dual-Wavelength cw Tm,Ho:GdVO4 Microchip Laser

A liquid nitrogen cooled dual-wavelength Tm,Ho：GdVO4 microchip laser is reported. The output dual wavelengths axe at 2038.9nm and 2050.1 nm. At each wavelength, the laser has a single longitudinal mode. The threshold power is nearly 20mW and the slope efficiency is 18.7%. The single longitudinal mode output power reaches 98mW, and the ratio of power is about 60% （2038.9nm） and 40% （2050.1 nm）.     

Growth and laser properties of Nd:Ca4YO(BO3)3 crystal

Nd:Ca₄YO(BO₃)₃ (Nd:YCOB) crystal was grown by the Czochralski method, and its structure was measured by using a four circle X-ray diffractometer. The transparent spectrum from 200 to 2600 nm was measured at room temperature. The fluorescence spectrum near 1.06 μm showed that the main emission wavelength of Nd:YCOB crystal was centered at 1060.8 nm. Laser output at 1.06 μm has been demonstrated when it was pumped by a Ti:sapphire laser at the wavelength of 794 nm, the highest output power was 68 mW under pumping power of 311 mW, the pumping threshold was 163 mW and slope efficiency was 46.9%. The self-frequency doubled green light has been observed when it was pumped by a Ti:sapphire or a laser diode (LD). A 14.5 mm Nd:YCOB crystal sample cut at (θ, φ)=(90°, 33°) was used for type I second-frequency generation (SHG) of the 1.06 μm laser pulse. The SHG conversion efficiency was 22%.     

Characteristics of a Cataphoresis He-Ca+ Recombination Laser

A cataphoretic input of calcium vapour into the active volume of pulsed He-Ca^＋ laser is designed and made. The recombination laser at 373.3 nm and the R-M transition laser at 854.6 nm are achieved experimentally with modified Blumlein circuit by high-frequency longitudinal pulsed discharge. The dependences of work parameters such as the pulse frequency, the power supply voltage and the helium pressure on laser output characteristics at 373.3nm line are measured and discussed. The maximum laser output power of 136mW and the specific power of 5.9 m W/cm^3 are obtained, respectively.     

Simultaneous dual-wavelength CW operation using F3/2–I13/2 transitions in Nd:YVO4 crystal

We experimentally demonstrate a dual-wavelength continuous wave (CW) Nd:YVO₄ laser simultaneously operating at 1342 and 1386 nm. A total output power of 439 mW is achieved when the laser is diode-end-pumped at an incident pump power of 2.4 W, indicating a slope efficiency of 35.6%. To the best of our knowledge, it is the first time that simultaneous dual-wavelength CW operation at 1342 and 1386 nm is reported.     

Compact, Low Threshold Nd^3＋：YVO4 Self-Raman Laser at 1178 nm

A compact low-threshold Raman laser at 1178 nm is experimentally realized by using a diode-end-pumped actively Q-switched Nd^3＋ ：YVO4 self-Raman laser. The threshold is 370mW at a pulse repetition frequency of S kHz. The maximum Raman laser output is 182 m W with the pulse duration smaller than 20 ns at a pulse repetition frequency of 30kHz with 1.8 W incident power. The optical efficiency from the incident power to the Raman laser is 10% and the slope efficiency is 13.5%.     

Characteristics of Nd:YGG Laser Operating at 4F3/2-4I9/2

The laser properties of the Nd：YGG crystal are investigated. The absorption spectrum from 500 to 90Onto and emission spectrum from 850 to 1400nm of Nd：YGG are measured. As much as 1.35 W output power of fundamental laser operating at 935 and 938nm with a slope efficiency of 15.7% and 105mW output power of frequency doubled blue laser are successfully obtained.     

Diode-pumped Nd:YVO4 laser emitting at 1074 nm based on the 4F3/2-4I11/2 transition

We report a diode-pumped Nd:YVO₄ laser emitting at 1074 nm, based on the ⁴ F _3/2-⁴ I _11/2 transition, generally used for a 1064 nm emission. A power of 323 mW at 1074 nm has been achieved in continuouswave (CW) operation with a fiber-coupled laser diode emitting 18.2 W at 808 nm. Intracavity second-harmonic generation in CW mode has also been demonstrated with a power of 18 mW at 537 nm by using a LiB₃O₅ (LBO) nonlinear crystal.     

Second harmonic generation in inhomogeneous MgO:LiNbO3 waveguides

A fibre laser at 1111.6 nm is frequency doubled by two inhomogeneous MgO:LiNbO3 waveguides and the output powers of 85 mW and 49 mW at 555.8 nm have been generated with the conversion efficiencies of 47% and 27% respectively. By analysing the second harmonic generation temperature tuning curves, we investigate the influence of the optical inhomogeneities upon the conversion efficiency. The final result shows that the efficiency difference is mainly affected by the optical inhomogeneities in our case.