The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Chingyue Wang - One of the best experts on this subject based on the ideXlab platform.
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high Pulse Energy mode locked multicore photonic crystal fiber laser
Optics Letters, 2011Co-Authors: Xiaohui Fang, Chen Xie, Youjian Song, Lu Chai, Chingyue WangAbstract:A high Pulse Energy passively mode-locked fiber laser operating in the all-normal dispersion regime is demonstrated. The gain material is an Yb-doped multicore photonic crystal fiber with 18 cores in array-type geometry. Robust and self-starting mode locking is achieved using a fast semiconductor saturable absorber mirror. The laser generates 180 nJ chirped Pulses at a 14.48 MHz repetition rate for an average power of 2.6 W. The 1.15 ps output Pulses are compressed to 690 fs outside the cavity.
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high Energy subpicosecond Pulse generation from a mode locked yb doped large mode area photonic crystal fiber laser with fiber facet output
IEEE Photonics Technology Letters, 2010Co-Authors: Yuying Zhang, Youjian Song, Lu Chai, Chi Zhang, Sijia Wang, Chingyue WangAbstract:Compact high-Energy mode-locked fiber lasers with fiber facet output based on a large-mode-area photonic crystal fiber are reported. Ultrashort Pulses with 46-nJ Pulse Energy and 1.9-ps time duration are obtained in all-normal-dispersion regime. Inserting a spectral filter, the laser system generates 828-fs Pulses, with 30-nJ Pulse Energy, and 36.3-kW peak power directly.
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environmentally stable high Pulse Energy yb doped large mode area photonic crystal fiber laser operating in the soliton like regime
IEEE Photonics Technology Letters, 2008Co-Authors: Youjian Song, Lu Chai, Minglie Hu, Changlei Wang, Zhen Tian, Qirong Xing, Chingyue WangAbstract:A high Pulse Energy passively mode-locking fiber laser operating in the soliton-like regime is demonstrated. The laser is based on a linear cavity design. A segment of Yb-doped single-polarization large-mode-area photonic crystal fiber serves as the gain medium, and the self-starting mode-locking is achieved by a high contrast semiconductor saturable absorber mirror. The laser directly generates 600-fs Pulses with 900 mW of average power at a repetition rate of 47.3 MHz, corresponding to a single Pulse Energy of 19 nJ. Furthermore, this fiber laser is directly used for pumping ZnTe to generate broadband terahertz radiation, resulting in a compact terahertz source.
Marc Eichhorn - One of the best experts on this subject based on the ideXlab platform.
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high Pulse Energy mid infrared fractional image rotation enhancement zngep 2 optical parametric oscillator
Optics Letters, 2016Co-Authors: Marc Eichhorn, Martin Schellhorn, Helge Fonnum, Magnus W. Haakestad, Espen LippertAbstract:Eichhorn, Marc; Schellhorn, Martin; Haakestad, Magnus W.; Fonnum, Helge; Lippert, Espen. High-Pulse-Energy mid-infrared fractional-image-rotation-enhancement ZnGeP2 optical parametric oscillator. Optics Letters 2016 ;Volum 41.(11) s. 2596-2599
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novel non planar ring cavity for enhanced beam quality in high Pulse Energy optical parametric oscillators
Optical Materials Express, 2014Co-Authors: Stefano Bigotta, Martin Schellhorn, Georg Stoppler, Jorg Schoner, Marc EichhornAbstract:A novel non-planar ring cavity is presented. It is shown that by using a fractional image rotation, i.e. a rotation whose angle cannot be expressed as 2π/n, where n is a small integer, the number of modes that can oscillate in the cavity is greatly reduced. This Fractional Image Rotation Enhancement (FIRE) cavity can thus be used to increase the beam quality in cases of low transversal mode discrimination, such as lasers with large pump and beam size and high-Pulse-Energy optical parametric oscillators (OPOs), especially when compactness and efficiency are key parameters. The experimental results obtained with a FIRE OPO for mid-IR (3–5 μm) generation based on a ZnGeP2 crystal pumped by a Ho3+:LiLuF4 MOPA system at 2.05 μm are compared to those realized with the same crystal and pump arrangement using a standard Rotated Image Singly-Resonant Twisted RectAngle (RISTRA) cavity. An increase of the beam quality from M2 of 2.08–2.29 to M2 of 1.88–1.99 is reached at 20 mJ Pulse Energy when the FIRE cavity is used.
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high Pulse Energy actively q switched tm3 doped silica 2 microm fiber laser pumped at 792 nm
Optics Letters, 2007Co-Authors: Marc Eichhorn, Stuart D JacksonAbstract:A diode-pumped Q-switched Tm(3+)-doped double-clad silica fiber laser is reported providing average powers of up to 30 W at Pulse widths of only 41 ns and repetition rates in the range of 10-125 kHz. Up to 270 microJ Pulse Energy was produced. Amplified spontaneous emission (ASE) buildup limits the maximum peak power, and the pump power and average output power at the point of ASE induced clamping were found to depend linearly on the repetition rate.
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high Pulse Energy actively q switched tm 3 doped silica 2 μm fiber laser pumped at 792 nm
Optics Letters, 2007Co-Authors: Marc Eichhorn, Stuart D JacksonAbstract:A diode-pumped Q-switched Tm3+-doped double-clad silica fiber laser is reported providing average powers of up to 30 W at Pulse widths of only 41 ns and repetition rates in the range of 10-125 kHz. Up to 270 μJ Pulse Energy was produced. Amplified spontaneous emission (ASE) buildup limits the maximum peak power, and the pump power and average output power at the point of ASE induced clamping were found to depend linearly on the repetition rate.
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development of a high Pulse Energy q switched tm doped double clad fluoride fiber laser and its application to the pumping of mid ir lasers
Optics Letters, 2007Co-Authors: Marc EichhornAbstract:A diode-pumped Q-switched Tm-doped double-clad fluoride fiber laser is reported providing up to 90 μJ Pulse Energy (160 ns, 100 kHz, i.e., 9 W of average power). The dependence of the fiber laser's repetition rate on pump power and modulator repetition rate was investigated. By amplification even higher Pulse energies of 410 μJ could be generated. In a second stage of the setup the Q-switched fiber laser serves as a pump for a gain-switched tunable Cr2+:ZnSe laser. The Pulse energies reported are to the author's knowledge the highest generated by Tm-doped fluoride fiber lasers or amplifiers today.
Youjian Song - One of the best experts on this subject based on the ideXlab platform.
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high Pulse Energy mode locked multicore photonic crystal fiber laser
Optics Letters, 2011Co-Authors: Xiaohui Fang, Chen Xie, Youjian Song, Lu Chai, Chingyue WangAbstract:A high Pulse Energy passively mode-locked fiber laser operating in the all-normal dispersion regime is demonstrated. The gain material is an Yb-doped multicore photonic crystal fiber with 18 cores in array-type geometry. Robust and self-starting mode locking is achieved using a fast semiconductor saturable absorber mirror. The laser generates 180 nJ chirped Pulses at a 14.48 MHz repetition rate for an average power of 2.6 W. The 1.15 ps output Pulses are compressed to 690 fs outside the cavity.
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high Energy subpicosecond Pulse generation from a mode locked yb doped large mode area photonic crystal fiber laser with fiber facet output
IEEE Photonics Technology Letters, 2010Co-Authors: Yuying Zhang, Youjian Song, Lu Chai, Chi Zhang, Sijia Wang, Chingyue WangAbstract:Compact high-Energy mode-locked fiber lasers with fiber facet output based on a large-mode-area photonic crystal fiber are reported. Ultrashort Pulses with 46-nJ Pulse Energy and 1.9-ps time duration are obtained in all-normal-dispersion regime. Inserting a spectral filter, the laser system generates 828-fs Pulses, with 30-nJ Pulse Energy, and 36.3-kW peak power directly.
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environmentally stable high Pulse Energy yb doped large mode area photonic crystal fiber laser operating in the soliton like regime
IEEE Photonics Technology Letters, 2008Co-Authors: Youjian Song, Lu Chai, Minglie Hu, Changlei Wang, Zhen Tian, Qirong Xing, Chingyue WangAbstract:A high Pulse Energy passively mode-locking fiber laser operating in the soliton-like regime is demonstrated. The laser is based on a linear cavity design. A segment of Yb-doped single-polarization large-mode-area photonic crystal fiber serves as the gain medium, and the self-starting mode-locking is achieved by a high contrast semiconductor saturable absorber mirror. The laser directly generates 600-fs Pulses with 900 mW of average power at a repetition rate of 47.3 MHz, corresponding to a single Pulse Energy of 19 nJ. Furthermore, this fiber laser is directly used for pumping ZnTe to generate broadband terahertz radiation, resulting in a compact terahertz source.
Lu Chai - One of the best experts on this subject based on the ideXlab platform.
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high Pulse Energy mode locked multicore photonic crystal fiber laser
Optics Letters, 2011Co-Authors: Xiaohui Fang, Chen Xie, Youjian Song, Lu Chai, Chingyue WangAbstract:A high Pulse Energy passively mode-locked fiber laser operating in the all-normal dispersion regime is demonstrated. The gain material is an Yb-doped multicore photonic crystal fiber with 18 cores in array-type geometry. Robust and self-starting mode locking is achieved using a fast semiconductor saturable absorber mirror. The laser generates 180 nJ chirped Pulses at a 14.48 MHz repetition rate for an average power of 2.6 W. The 1.15 ps output Pulses are compressed to 690 fs outside the cavity.
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high Energy subpicosecond Pulse generation from a mode locked yb doped large mode area photonic crystal fiber laser with fiber facet output
IEEE Photonics Technology Letters, 2010Co-Authors: Yuying Zhang, Youjian Song, Lu Chai, Chi Zhang, Sijia Wang, Chingyue WangAbstract:Compact high-Energy mode-locked fiber lasers with fiber facet output based on a large-mode-area photonic crystal fiber are reported. Ultrashort Pulses with 46-nJ Pulse Energy and 1.9-ps time duration are obtained in all-normal-dispersion regime. Inserting a spectral filter, the laser system generates 828-fs Pulses, with 30-nJ Pulse Energy, and 36.3-kW peak power directly.
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environmentally stable high Pulse Energy yb doped large mode area photonic crystal fiber laser operating in the soliton like regime
IEEE Photonics Technology Letters, 2008Co-Authors: Youjian Song, Lu Chai, Minglie Hu, Changlei Wang, Zhen Tian, Qirong Xing, Chingyue WangAbstract:A high Pulse Energy passively mode-locking fiber laser operating in the soliton-like regime is demonstrated. The laser is based on a linear cavity design. A segment of Yb-doped single-polarization large-mode-area photonic crystal fiber serves as the gain medium, and the self-starting mode-locking is achieved by a high contrast semiconductor saturable absorber mirror. The laser directly generates 600-fs Pulses with 900 mW of average power at a repetition rate of 47.3 MHz, corresponding to a single Pulse Energy of 19 nJ. Furthermore, this fiber laser is directly used for pumping ZnTe to generate broadband terahertz radiation, resulting in a compact terahertz source.
U Keller - One of the best experts on this subject based on the ideXlab platform.
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ultrafast thin disk laser with 80 μj Pulse Energy and 242 w of average power
Optics Letters, 2014Co-Authors: Clara J Saraceno, Florian Emaury, Cinia Schriber, M Hoffmann, Matthias Golling, T Sudmeyer, U KellerAbstract:We present a semiconductor saturable absorber mirror (SESAM) mode-locked thin-disk laser generating 80 μJ of Pulse Energy without additional amplification. This laser oscillator operates at a repetition rate of 3.03 MHz and delivers up to 242 W of average output power with a Pulse duration of 1.07 ps, resulting in an output peak power of 66 MW. In order to minimize the parasitic nonlinearity of the air inside the laser cavity, the oscillator was operated in a vacuum environment. To start and stabilize soliton mode locking, we used an optimized high-damage threshold, low-loss SESAM. With this new milestone result, we have successfully scaled the Pulse Energy of ultrafast laser oscillators to a new performance regime and can predict that Pulse energies of several hundreds of microjoules will become possible in the near future. Such lasers are interesting for both industrial and scientific applications, for example for precise micromachining and attosecond science.
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femtosecond thin disk laser oscillator with Pulse Energy beyond the 10 microjoule level
Optics Express, 2008Co-Authors: S V Marchese, Matthias Golling, T Sudmeyer, C R E Baer, A G Engqvist, S Hashimoto, D J H C Maas, U KellerAbstract:We report on a passively mode-locked Yb:YAG thin disk laser oscillator that generates 11.3-µJ Pulses without the use of any additional external amplification. A repetition rate of 4 MHz is obtained using a 23.4-m-long multiple-pass cavity that extends the resonator length to a total of 37 m. The nearly transform-limited Pulses at 45 W of average output power have a duration of 791 fs with a 1.56-nm-broad spectrum centered at 1030 nm. The laser is operated in a helium atmosphere to eliminate the air nonlinearity inside the resonator that previously limited the Pulse Energy.
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Pulse Energy scaling to 5 μj from a femtosecond thin disk laser
Optics Letters, 2006Co-Authors: S V Marchese, Matthias Golling, T Sudmeyer, Rachel Grange, U KellerAbstract:We report an increase in Pulse Energy to 5.1μJ obtained directly from a femtosecond diode-pumped Yb:YAG thin disk laser without external amplification. Stable passive mode locking was obtained with a semiconductor saturable absorber mirror (SESAM). The laser delivers 63W of average output power in a nearly diffraction-limited beam (M2=1.1) at a center wavelength of 1030nm. The Pulse repetition rate is 12.3MHz, and the Pulses have a duration of 800fs, which results in a peak power of 5.6MW. The laser was operated in a box flooded with helium because the nonlinearity of air was found to be a limiting factor for the stability of the Pulse formation at increasing Pulse energies.
