scholarly journals Tape casting of a YAG/Yb:YAG/YAG transparent ceramic for a broadband tunable laser

2014 ◽  
Vol 2 ◽  
Author(s):  
Chao Wang ◽  
Wenxue Li ◽  
Xianghui Yang ◽  
Dongbi Bai ◽  
Kangwen Yang ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Maximum Output Power ◽  
Tape Casting ◽  
Tunable Laser ◽  
Laser Cavity ◽  
Optical Transmittance ◽  
Maximum Output ◽  
Casting Method ◽  
Output Wavelength ◽  
Low Threshold

Abstract A composite transparent YAG/Yb:YAG/YAG ceramic was prepared by a non-aqueous tape-casting method. An optical transmittance of 82% was obtained at visible wavelength and around 1100 nm. A low-threshold, broadband tunable continuous-wave (CW) laser at 1031 nm was further demonstrated from the ceramic sample, which was pumped by a 974 nm fiber-pigtailed laser diode. The threshold pump power was 0.45 W and the maximum output power was 3.2 W, corresponding to a slope efficiency of 20.4%. By inserting an SF57 prism in the laser cavity, the output wavelength could be tuned continuously from 1021 to 1058 nm.

LD-pumped high-power continuous-wave Pr3+:YLF deep red lasers at 718.5 and 720.8 nm

Laser Physics ◽  
2021 ◽  
Vol 32 (2) ◽  
pp. 025801
Author(s):  
Xiangrui Liu ◽  
Zhuang Li ◽  
Chengkun Shi ◽  
Bo Xiao ◽  
Run Fang ◽  
...  
Keyword(s):  
Output Power ◽  
High Power ◽  
Slope Efficiency ◽  
Laser Emission ◽  
Continuous Wave ◽  
Optical Glass ◽  
Maximum Output Power ◽  
Glass Plate ◽  
Maximum Output ◽  
First Time

Abstract We demonstrated 22 W LD-pumped high-power continuous-wave (CW) deep red laser operations at 718.5 and 720.8 nm based on an a-cut Pr3+:YLF crystal. The output power of both polarized directions reached the watt-level without output power saturation. A single wavelength laser operated at 720.8 nm in the π-polarized direction was achieved, with a high output power of 4.5 W and high slope efficiency of approximately 41.5%. To the best of our knowledge, under LD-pumped conditions, the laser output power and slope efficiency are the highest at 721 nm. By using a compact optical glass plate as an intracavity etalon, we suppressed the π-polarized 720.8 nm laser emission. And σ-polarized single-wavelength laser emission at 718.5 nm was achieved, with a maximum output power of 1.45 W and a slope efficiency of approximately 17.8%. This is the first time that we have achieved the σ-polarized laser emission at 718.5 nm generated by Pr3+:YLF lasers.

scholarly journals Continuous-Wave and Passively Q-Switched Er:Y2O3 Ceramic Laser at 2.7 μm

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Zhipeng Qin ◽  
Guoqiang Xie ◽  
Jian Zhang ◽  
Jingui Ma ◽  
Peng Yuan ◽  
...  
Keyword(s):  
Output Power ◽  
Continuous Wave ◽  
Maximum Output Power ◽  
Maximum Output ◽  
Average Output ◽  
Semiconductor Saturable Absorber ◽  
Infrared Spectral ◽  
Maximum Average Output Power ◽  
Ceramic Laser ◽  
Stable Passive

We report on a continuous-wave (CW) and passively Q-switched Er:Y2O3 ceramic laser in mid-infrared spectral region. In the CW regime, a maximum output power of 2.07 W is achieved at 2717.3 nm with a slope efficiency of 13.5%. Stable passive Q-switching of the Er:Y2O3 ceramic laser is demonstrated based on semiconductor saturable absorber mirror. Under an absorbed pump power of 12.4 W, a maximum average output power of 223 mW is generated with a pulse energy of 1.7 μJ and a pulse width of 350 ns at 2709.3 nm.

scholarly journals Wavelength-Tunable Nonlinear Mirror Mode-Locked Laser Based on MgO-Doped Lithium Niobate

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 861
Author(s):  
Lina Zhao ◽  
Luyang Tong ◽  
Fangxin Cai ◽  
Ye Yuan ◽  
Yangjian Cai
Keyword(s):  
Lithium Niobate ◽  
Continuous Wave ◽  
Maximum Output Power ◽  
Picosecond Laser ◽  
Output Pulse ◽  
Mode Locking ◽  
Maximum Output ◽  
Wavelength Tunable ◽  
Mirror Mode ◽  
Mode Locked Laser

We present a high-power, wavelength-tunable picosecond Yb3+: CaGdAlO4 (Yb:CALGO) laser based on MgO-doped lithium niobate (MgO:LN) nonlinear mirror mode locking. The output wavelength in the continuous wave (CW) regime is tunable over a 45 nm broad range. Mode locking with a MgO:LN nonlinear mirror, the picosecond laser is tunable over 23 nm from 1039 to 1062 nm. The maximum output power of the mode-locked laser reaches 1.46 W, and the slope efficiency is 18.6%. The output pulse duration at 1049 nm is 8 ps. The laser repetition rate and bandwidth are 115.5 MHz and 1.7 nm, respectively.

scholarly journals Over 19 W Single-Mode 1545 nm Er,Yb Codoped All-Fiber Laser

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Jiadong Wu ◽  
Chunxiang Zhang ◽  
Jun Liu ◽  
Ting Zhao ◽  
Weichao Yao ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Output Power ◽  
Stimulated Raman Scattering ◽  
Maximum Output Power ◽  
Laser Cavity ◽  
Single Mode ◽  
Transverse Mode ◽  
Spectral Width ◽  
Maximum Output ◽  
Silica Fibers

We report a high-power cladding-pumped Er,Yb codoped all-fiber laser with truly single transverse mode output. The fiber laser is designed to operate at 1545 nm by the use of a pair of fiber Bragg gratings (FBGs) to lock and narrow the output spectrum, which can be very useful in generating the eye-safe ~1650 nm laser emission through the Stimulated Raman Scattering (SRS) in silica fibers that is of interest in many applications. Two pieces of standard single-mode fibers are inserted into the laser cavity and output port to guarantee the truly single-mode output as well as good compatibility with other standard fiber components. We have obtained a maximum output power of 19.2 W at 1544.68 nm with a FWHM spectral width of 0.08 nm, corresponding to an average overall slope efficiency of 31.9% with respect to the launched pump power. This is, to the best of our knowledge, the highest output power reported from simple all-fiber single-mode Er,Yb codoped laser oscillator architecture.

scholarly journals A Compact and High Efficiency Intracavity Opo Based on Periodically-poled Lithium Niobate

2020 ◽  
Author(s):  
Ke Wang ◽  
Mingyao Gao ◽  
Shuhui Yu ◽  
Jian Ning ◽  
Zhenda Xie ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
High Efficiency ◽  
Continuous Wave ◽  
Maximum Output Power ◽  
Maximum Output ◽  
Periodically Poled ◽  
Periodically Poled Lithium Niobate ◽  
Optical Parametric ◽  
Simulated Temperature ◽  
Output Laser

Abstract We demonstrate a compact, high-efficiency and widely tunable intracavity singly resonant optical parametric oscillator (IC-OPO) based on multichannel periodically-poled lithium niobate (PPLN). The IC-OPO is composed of 808 nm pump laser diode (LD), Nd:YVO4 laser and linear OPO. The continuous-wave (CW) mid-infrared (MIR) output laser is tunable from 2.25 μm to 4.79 μm. The maximum output power exceeds 1.08 W at 3.189 μm at 9.1 W LD pump power and the conversion efficiency is 11.88 %. We also build up a prototype with volume of Wmm3 and its total weight is less than 2 Kg. The measured power stability is 1.3 % Root Meat Square (RMS) for a 3 h duration under simulated high temperature conditions of 40 ℃. RMS is 2.6 % for a 4 h duration when simulated temperature is - 40 ℃.

scholarly journals In-Band Pumped Continuous-Wave Lasers Based on Ho:KY(WO4)2 Crystal and Ho:KGdYbY(WO4)2 Epitaxial Layer

2020 ◽  
Vol 11 (4) ◽  
pp. 264-271
Author(s):  
O. P. Dernovich ◽  
N. V. Gusakovа ◽  
V. E. Kisel ◽  
A. V. Kravtsov ◽  
S. A. Guretsky ◽  
...  
Keyword(s):  
Single Crystal ◽  
Output Power ◽  
Epitaxial Layer ◽  
Continuous Wave ◽  
Maximum Output Power ◽  
Laser Generation ◽  
Maximum Output ◽  
Solid State Lasers ◽  
Practical Applications ◽  
Double Tungstate

2 μm lasers are in demand for a number of practical applications, such as environmental monitoring, remote sensing, medicine, material processing, and are also used as a pump sources for optical parametric generators. Crystals of double potassium tungstates doped with ions of rare-earth elements were shown to be promising materials both for  the  creation  of  classical  solid-state  lasers  and  waveguide  lasers. The aim of this work was to develop a tunable pump laser in the spectral region of 1.9 µm based on double tungstate crystals doped with thulium ions and to study the lasing characteristics of a Ho:KY(WO4)2 crystal and a Ho:KGdYbY(WO4)2 single-crystal epitaxial layer under in-band pumping.With a Ho(1at.%):KY(WO4)2  crystal, continuous wave low-threshold lasing with an output power of 85 mW with a slope efficiency of 54 % at 2074 nm was achieved. For the first time to our knowledge, continuous wave laser  generation  in  a  waveguide  configuration  is  realized  in  a  single-crystal  layer of potassium tungstate doped with holmium ions grown by liquid-phase epitaxy. The maximum output power at a wavelength of 2055 nm was 16.5 mW.

scholarly journals All-Fiber Gas Raman Laser by D2-Filled Hollow-Core Photonic Crystal Fibers

Photonics ◽  
2021 ◽  
Vol 8 (9) ◽  
pp. 382
Author(s):  
Wenxi Pei ◽  
Hao Li ◽  
Wei Huang ◽  
Meng Wang ◽  
Zefeng Wang
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fibers ◽  
Maximum Output Power ◽  
Tunable Laser ◽  
Raman Laser ◽  
Single Mode ◽  
Maximum Output ◽  
Solid Core ◽  
Hollow Core ◽  
Crystal Fibers

We report here an all-fiber structure tunable gas Raman laser based on deuterium-filled hollow-core photonic crystal fibers (HC-PCFs). An all-fiber gas cavity is fabricated by fusion splicing a 49 m high-pressure deuterium-filled HC-PCF with two solid-core single-mode fibers at both ends. When pumped with a pulsed fiber amplifier seeded by a tunable laser diode at 1.5 μm, Raman lasers ranging from 1643 nm to 1656 nm are generated. The maximum output power is ~1.2 W with a Raman conversion efficiency of ~45.6% inside the cavity. This work offers an alternative choice for all-fiber lasers operating at 1.6–1.7 μm band.

scholarly journals kW-class high power fiber laser enabled by active long tapered fiber

2018 ◽  
Vol 6 ◽  
Author(s):  
Chen Shi ◽  
Hanwei Zhang ◽  
Xiaolin Wang ◽  
Pu Zhou ◽  
Xiaojun Xu
Keyword(s):  
Fiber Laser ◽  
Output Power ◽  
Continuous Wave ◽  
Beam Quality ◽  
Laser System ◽  
Maximum Output Power ◽  
Nonlinear Effects ◽  
Fiber Amplifier ◽  
Maximum Output ◽  
Tapered Fiber

Compared with traditional uniform fibers, tapered fiber has numerous unique advantages, such as larger mode area, higher pump absorption, suppression to nonlinear effects, and maintaining good beam quality. In this manuscript, we have constructed an all-fiberized fiber amplifier which is based on a piece of ytterbium-doped tapered double-clad fiber (T-DCF). The fiber amplifier is operated under continuous wave (CW) regime at 1080 nm wavelength. The $M^{2}$ factor of the amplifier at 1.39 kW output power is ${\sim}1.8$. The maximum output power of the system reached 1.47 kW, which, to the best of our knowledge, is the highest output power of long tapered fiber based fiber laser system. Our result successfully verifies the potential of power scalability and all-fiberized capability of long tapered fiber, and the performance of our system can be further enhanced by fiber design optimization.

scholarly journals A compact and high efficiency intracavity OPO based on periodically poled lithium niobate

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ke Wang ◽  
Mingyao Gao ◽  
Shuhui Yu ◽  
Jian Ning ◽  
Zhenda Xie ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
High Efficiency ◽  
Continuous Wave ◽  
Maximum Output Power ◽  
Maximum Output ◽  
Periodically Poled ◽  
Periodically Poled Lithium Niobate ◽  
Optical Parametric ◽  
Simulated Temperature ◽  
Output Laser

AbstractWe demonstrate a compact, high efficiency and widely tunable intracavity singly resonant optical parametric oscillator (IC-OPO) based on multichannel periodically poled lithium niobate (PPLN). The IC-OPO is composed of 808 nm pump laser diode (LD), Nd:YVO4 laser and linear OPO. The continuous-wave (CW) mid-infrared (MIR) output laser is tunable from 2.25 to 4.79 μm. The maximum output power exceeds 1.08 W at 3.189 μm at 9.1 W LD pump power and the conversion efficiency is 11.88%. We also build up a prototype with volume of 145 × 85 × 42.5 mm3 and its total weight is less than 2 kg. The measured power stability is 1.3% Root Meat Square (RMS) for a 3 h duration under simulated high temperature conditions of 40 °C. RMS is 2.6% for a 4 h duration when simulated temperature is − 40 °C.

scholarly journals Tunable Stokes Laser Based on KTiOPO4 Crystal

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 974
Author(s):  
Zecheng Wang ◽  
Xingyu Zhang ◽  
Zhenhua Cong ◽  
Zhaojun Liu ◽  
Xiaohan Chen ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Output Power ◽  
Stimulated Raman Scattering ◽  
Pulse Repetition Frequency ◽  
Maximum Output Power ◽  
Rate Equations ◽  
Stokes Wave ◽  
Maximum Output ◽  
Output Wavelength ◽  
Stimulated Raman

The characteristics of a tunable Stokes laser based on the cascaded stimulated polariton scattering and stimulated Raman scattering in KTiOPO4 crystal were studied experimentally and theoretically. When the pumping wavelength was 1064 nm, the Stokes laser output wavelength was able to be tuned discontinuously from 1112.08 nm to 1113.64 nm, from 1114.94 nm to 1115.77 nm, and from 1117.37 nm to 1119.92 nm, and the maximum output power appeared at 1118.86 nm. With a pulse repetition frequency of 7 kHz and a pump power of 6.0 W, the maximum output power of the Stokes laser reached 734 mW, and the corresponding diode to laser conversion efficiency was 12.2%. The rate equations describing the temporal evolutions of the fundamental and Stokes waves by noncollinear stimulated polariton scattering and the Stokes wave by collinear stimulated Raman scattering were derived. They were used to simulate the tunable Stokes laser. The calculated results were in agreement with the experimental results on the whole.

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