Tm-Doped Fibre Laser Pumped Cr^2＋：ZnSe Poly-Crystal Laser

Demonstrations of cw lasing in Cr^2＋：ZnSe poly-crystal are reported. The laser consists of a 1.7-mm-thick Cr^2＋ ：ZnSe poly-crystal disc pumped by a Tin-silica double-clad fibre laser at 2050nm. Using a concave high- reflection mirror with a radius of curvature of 500mm as the rear mirror, the laser delivers up to 1030mW of radiation around 2.367μm.     

Study on Stabilization of a Synchronously Pumped Dye Laser

ＳｔｕｄｙｏｎＳｔａｂｉｌｉｚａｔｉｏｎｏｆａＳｙｎｃｈｒｏｎｏｕｓｌｙＰｕｍｐｅｄＤｙｅＬａｓｅｒ￥ＺＨＵＨｅｙｕａｎ；ＳＵＮＤｉｅｃｈｉ；ＨＵＹｉｍｅｉ；ＬＩＦｕｍｉｎｇ（ＳｔａｔｅＫｅｙＪｏｉｎｔＬａｂｏｒａｔｏｒｙｆｏｒＭａｔｅｒｉａｌＭｏｄ...     

A 1.107 μm Yb~(3 ) doped Phosphate Fiber Laser Pumped by a Ti:sapphire

A 1.107 μm Yb~(3 ) doped Phosphate Fiber Laser Pumped by a Ti:sapphire     

LD Pumped Q-Switching and Self-starting Mode-locked All Fiber Laser

ＬＤＰｕｍｐｅｄＱ－ＳｗｉｔｃｈｉｎｇａｎｄＳｅｌｆ－ｓｔａｒｔｉｎｇＭｏｄｅ－ｌｏｃｋｅｄＡｌｌＦｉｂｅｒＬａｓｅｒ￥ＺＨＡＮＧＪｉａｎ；ＬＩＪｉｎｇｈｕｉ；ＪＩＡＮＧＸｉｎｇ；ＬＩＵＸｉａｏｍｉｎｇ；ＰＥＮＧＪｉａｎｇｄｅ（Ｄｅｐａｒｔｍｅｎｔｏ...     

A 0．98μm Laser Diode Pumped Erbium－Doped Fiber Amplifier with 40nm Bandwidth

Ａ０．９８μｍＬａｓｅｒＤｉｏｄｅＰｕｍｐｅｄＥｒｂｉｕｍ－ＤｏｐｅｄＦｉｂｅｒＡｍｐｌｉｆｉｅｒｗｉｔｈ４０ｎｍＢａｎｄｗｉｄｔｈ￥ＬＩＪｉｎｇｈｕｉ；ＰＥＮＧＪｉａｎｇｄｅ；ＪＩＡＮＧＸｉｎ；ＹＡＯＭｉｎｙｕ；ＷＵＧｅｎｇｓｈｅｎｇ；ＦＡＮＣｈｏ...     

Laser Diode Pumped Unidirectional Ring Laser Resonator with AOM Q-switch

ＬａｓｅｒＤｉｏｄｅＰｕｍｐｅｄＵｎｉｄｉｒｅｃｔｉｏｎａｌＲｉｎｇＬａｓｅｒＲｅｓｏｎａｔｏｒｗｉｔｈＡＯＭＱ┐ｓｗｉｔｃｈＪ．Ｃｈｅｎ１）Ａ．Ｄｅｈｎ２）Ｈ．Ｊ．Ｅｉｃｈｌｅｒ２）Ａ．Ｈａａｓｅ２）Ｏ．Ｍｅｈｌ２）（１）ＮａｔｉｏｎａｌＫｅｙＬ...     

A Mid-Irfrared Rectangle Ring OPO Pumped by an Actively/Passively Q-Switched 2.09 μm Polycrystalline Laser

Journal of Russian Laser Research - We demonstrate a mid-infrared (mid-IR) ZnGeP2 (ZGP) rectangle ring optical parametric oscillator (OPO) pumped by an actively/passively Q-switched polycrystalline...     

In-Band Pumped High Power Ho：YAG Ceramic Laser by a Tm：YLF Laser

High-power 2 μm lasers are promising candidates for a variety of applications including remote sens- ing, wind lidar, and medicine as well as mid- infrared generation via pumping of optical parametric oscillators. Due to the advantages of low quantum defects and high efficiency, resonantly pumped Ho- doped lasers have attracted great attention. Ho：YAG single crystals have also been widely studied to ob- tain cw and Q-switched laser operation in the 2 μm wavelengths range.     

A High Efficient Stable Intracavity Doubling Nd：YAG Laser Pumped by a Laser Diode

ＡＨｉｇｈＥｆｆｉｃｉｅｎｔＳｔａｂｌｅＩｎｔｒａｃａｖｉｔｙＤｏｕｂｌｉｎｇＮｄ：ＹＡＧＬａｓｅｒＰｕｍｐｅｄｂｙａＬａｓｅｒＤｉｏｄｅ￥ＺＨＡＮＧＫｕａｎｓｈｏｕ；ＸＩＥＣｈａｎｇｄｅ；ＧＵＯＲｉｎｇｘｉａｎｇ；ＰＥＮＧＫｕｎｃｈｉ（Ｉｎｓｔｉｔ...     

Efficient Long Wave IR Laser from Ho：YAG 2 μm Pumped ZnGeP2 Optical Parametric Oscillator

An efficient high power long wave infrared laser based on ZnGeP2 optical parametric oscillator pumped by a 2.09μm Tm：YLF/Ho：YAG laser at 10KHz pulse repetition rate is reported. The pump to idler conversion efficiency is 8% at 15.6W Ho pump power level and a quantum efficiency of 31% when the 1idler wavelength is tuned at 8.08μm. The wavelength tuning range from 8-9.1μm is also achieved by rotating the ZGP crystal.     

A High Efficiency Yb~(3 )-doped Fiber Ring Cavity Laser with Narrow Line-width

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ｔｏｄａｙ ,ｔｈｅＥｒ3 ｄｏｐｅｄｆｉｂｅｒｌａｓｅｒａｎｄｔｈｅａｍｐｌｉｆｉｅｒａｒｅｗｉｄｅｌｙｕｓｅｄｉｎｔｈｅｆｉｅｌｄｏｆｏｐｔｉｃａｌｃｏｍｍｕｎｉｃａｔｉｏｎａｎｄｏｔｈｅｒｆｉｅｌｄｓ.ＴｈｅＹｂ3 ｄｏｐｅｄｆｉｂｅｒｌａｓｅｒａｎｄａｍｐｌｉｆｉｅｒｈａｖｅｂｅｅｎｉｎｖｅｎｔｅｄａｎｄｕｓｅｄｉｎｍａｎｙｉｍｐｏｒｔａｎｔｆｉｅｌｄｓｔｏｏ ,ａｎｄｔｈｅｙａｒｅａｔｔｒａｃｔｉｎｇｍｏｒｅａｎｄｍｏｒｅａｔｔｅｎｔｉｏｎ[1～ 4 ] .Ｃｏｍｐａｒ…     

High Temperature Laser Generation of Quantum-Cascade Lasers in the Spectral Region of 8 μm

Physics of the Solid State - Abstract—In this paper, we present studies of the characteristics of quantum-cascade lasers with a generation wavelength in the region of 8 μm at high...     

Efficient Compound-Cavity Eye-Safe KTP OPO at 1.57 μm Pumped by an Electro-Optic Q-Switched Nd：YAG Laser

An efficient high-energy eye-safe optical parametric oscillator （OPO） based on a type-Ⅱ non-critically phasematched KTP crystal is demonstrated. The KTP OPO is pumped by a quasi-cw diode side-pumped electrooptic Q-switched Nd：YAG laser in a compound-cavity configuration. The maximum output energy of the signal wavelength at 1.57 μm b 66.5 m J, corresponding to an electrical-to-optical conversion efficiency of 4.47% and an optical-to-optical conversion efficiency of 12.1%. The pulse width （FWHM） is about 3.6 ns with a peak power of 18.5 MW. The output energy is insensitive to repetition rate and demonstrates good stability.     

Multiple-Pulse Operation in Passively Mode-Locked Fibre Laser with Positive Dispersion Cavity

We report the observation of rectangular shape spectrum in passively mode-locked fibre laser with positive dispersion cavity. The spectrum is broad and flat, and 3dB bandwidth can be up to 17.61 nm. Multiple-pulse operation is observed in our laser system. The spectrum width, pulse energy, pulse width and peak power of the mode-locked laser output change with the appearance of multiple-pulse operation.     

CW Discharge‐Pumped DCN Laser with Novel Mixture Gas

This paper describes a CW submillimeter waveguide dischargepumped DCN laser operating on 190 and 195m lines with novel mixture gas(N₂, CD₄, and D₂). No brown polymer deposit was found after long time discharge even at low wall temperature. The laser discharge length is 3 m, and the resonator length is 3.4 m. The resonator cavity consists of a pyrex tube of 54 mm diameter and two plane reflectors against its ends, one is a plane mirror, the other is a metal mesh. After optimization of various parameters, such as the N₂:CD₄:D₂ gas mixture, the discharge current and the wall temperature, this laser delivers 150 and 160mW on the 190 and 195m lines, respectively, for EH₁₁ mode.     

High efficiency cw far infrared lasers at 119 μm and 127 μm

The optically pumped FIR laser lines at 119 m from CH₃OH and at 127 m from¹³CD₃OH are known to be the most powerful in the far infrared spectral region. We report on efficiency measurements for our waveguide laser system. The effect of various parameters was investigated, resulting in the highest efficiency ever reported for the 119 m line. The Stark effect and others parameters of the 127 m were measured, and a new¹³CD₃OH laser line at 175 m discovered, with the same pump transition. These measurements are helpful for completing the assignment already proposed for the 127 m line.     

Thermal Lensing, Laser Performance at 1.06 μm and 0.53 μm of a NYAB Laser End-pumped by a Diode-laser-array

The thermal lensing, output characteristics of an end-pumped NYAB laser with high pump power levels and operated at the fundamental wavelength, and the manner of self-frequency-doubling, have been investigated. The thermal lensing in the NYAB crystal was found to be significantly stronger than that in Nd:YVO4 crystal. A maximum output of 3.2 W at 1.06 μm was achieved with an optical conversion efficiency of 29.1％ and an average slope efficiency of 37.5％. These results were found to be slightly inferior to those of Nd:YVO4 crystal. When operated in the fashion of selffrequency-doubling, 23 mW green output was obtained at the incident pump power of 5 W, such inefficient operation was attributed to the large mode size in the NYAB crystal.     

A Continuous-Wave Ho：YA103 Laser with Output 8.5 W Pumped by a 1.91μm Laser at Room Temperature

A cw high efficient Ho：YAI03 laser pumped by 1.91 μm diode-pumped Tm：YLF laser at room temperature is realized. The maximum output power reaches 8.5 W when the incident pump power is 15.6 W. The slope efficiency is 63.7%, and the Tm：YLF to Ho：YAP optical conversion efficiency is 54.5%. The laser wavelength is 2118.3nm when the transmission of output coupler is 30%. The beam quality factor is M2 -1.39 measured by the traveling knife-edge method.     

Multiwavelength Dispersion-Tuned Actively Mode-Locked Erbium-Doped Fibre Ring Laser with Gain Competition Suppression

Multiwavelength dispersion-tuned actively mode-locked erbium-doped fibre ring laser is demonstrated by incorporating a section of highly nonlinear fibre （HNLF） in the laser cavity. The HNLF and the time gate element （modulator） in the fibre laser successfully suppress the gain competition in the erbium-doped fibre, and thus enable multiwavelength operation. Simultaneous generation of 10 GHz pulses up to eight different wavelengths is achieved. Wavelength, spacing and modes number tuning are investigated by changing fibre cavity length, dispersion, and erbium-doped fibre amplifier power, respectively.     

Laser Diode Pumped 1.54μm Er：Yb：Phosphate Glass Continuous Wave Compact Laser

We report a cw Er^3 :Yb^3 co-doped phosphate glass laser pumped by a laser diode. The maximum output power of 78.3mW and a slope efficiency of 15.25% were achieved. The laser spectral region was from 1532nm to 1535nm, with the peak laser wavelength at 1534nm. The laser modes and time stabillty were also measured.The thermal effect had little influence on the output in our experiment.