The Experts below are selected from a list of 24033 Experts worldwide ranked by ideXlab platform
Wingki Liu - One of the best experts on this subject based on the ideXlab platform.
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graphene based q switched erbium doped fiber laser with wide Pulse Repetition Rate range
IEEE Photonics Technology Letters, 2012Co-Authors: Li Wei, Dapeng Zhou, H Y Fan, Wingki LiuAbstract:We demonstRated a novel graphene Q-switched erbium-doped fiber laser with wide Pulse-Repetition-Rate range. The Q-switched fiber laser is constructed with a 37-cm linear cavity formed by two fiber Bragg gratings, a section of highly doped erbium fiber, and a graphene saturable absorber. The laser has a low pump threshold of 16.9 mW, a wide range of Repetition Rate from 31.7 to 236.3 kHz, and minimum Pulse duration of 206 ns. The short-cavity laser structure enables laser action free of self-mode-locking effects.
Shuangchun Wen - One of the best experts on this subject based on the ideXlab platform.
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Nanosecond $Q$ -Switched Erbium-Doped Fiber Laser With Wide Pulse-Repetition-Rate Range Based on Topological Insulator
IEEE Journal of Quantum Electronics, 2014Co-Authors: Man Wu, Yu Chen, Han Zhang, Shuangchun WenAbstract:We demonstRated the generation of stable topological insulator nanosecond Q -switched erbium-doped fiber laser with wide Pulse Repetition Rate range. By virtue of the excellent saturable absorption property of the topological insulator saturable absorber, the Q -switched fiber laser with a section of high concentration erbium-doped fiber and two fiber Bragg gratings in a simple linear laser cavity can produce Q -switched Pulse with a wide range of Pulse Repetition Rate from 12.6 to 177.7 kHz, and minimum Pulse duration of 217 ns. This laser configuration enables laser operation free of self-mode-locking effects.
U Keller - One of the best experts on this subject based on the ideXlab platform.
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compact extreme ultraviolet source at megahertz Pulse Repetition Rate with a low noise ultrafast thin disk laser oscillator
Optica, 2015Co-Authors: Florian Emaury, Andreas Diebold, Clara J Saraceno, U KellerAbstract:We present a compact extreme ultraviolet (XUV) source based on high-harmonic generation (HHG) at 2.4 MHz Pulse Repetition Rate driven from the compressed output of a mode-locked thin-disk laser (TDL) oscillator. The system geneRates very high peak intensities, which enable highly nonlinear frequency conversion reaching VUV/XUV energies. These sources significantly increase the signal-to-noise ratio and reduce measurement durations in many fields such as condensed matter physics. The Pulse Repetition Rate is increased from kilohertz to megahertz with high average photon flux, while keeping the Pulse energy sufficiently low to avoid space charge effects. The system uses a semiconductor saturable absorber mirror mode-locked Yb:YAG TDL delivering an average power of up to 70 W with subpicosecond Pulses, which are efficiently compressed to sub-100 fs in a simple, single-stage compressor based on a Kagome-type hollow-core photonic crystal fiber. Focusing into a high-pressure xenon gas jet, we geneRate XUV radiation with up to >5×107 photons/s on the 19th harmonic (23 eV). This HHG system is very compact, has low-noise performance comparable to standard ultrafast low-power laser oscillators, and provides a new tool for the study of attosecond dynamics in condensed matter physics.
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Pulse Repetition Rate scaling from 5 to 100 ghz with a high power semiconductor disk laser
Optics Express, 2014Co-Authors: M Mangold, C A Zaugg, Sandro M Link, Matthias Golling, B W Tilma, U KellerAbstract:The high-power semiconductor laser studied here is a modelocked integRated external-cavity surface emitting laser (MIXSEL), which combines the gain of vertical-external-cavity surface-emitting lasers (VECSELs) with the saturable absorber of a semiconductor saturable absorber mirror (SESAM) in a single semiconductor layer stack. The MIXSEL concept allows for stable and self-starting fundamental passive modelocking in a simple straight cavity and the average power scaling is based on the semiconductor disk laser concept. Previously record-high average output power from an optically pumped MIXSEL was demonstRated, however the long Pulse duration of 17 ps prevented higher Pulse Repetition Rates and many interesting applications such as supercontinuum generation and broadband frequency comb generation. With a novel MIXSEL structure, the first femtosecond operation was then demonstRated just recently. Here we show that such a MIXSEL can also support Pulse Repetition Rate scaling from ≈5 GHz to >100 GHz with excellent beam quality and high average output power, by mechanically changing the cavity length of the linear straight cavity and the output coupler. Up to a Pulse Repetition Rate of 15 GHz we obtained average output power >1 W and Pulse durations <4 ps. Furthermore we have been able to demonstRate the highest Pulse Repetition Rate from any fundamentally modelocked semiconductor disk laser with 101.2 GHz at an average output power of 127 mW and a Pulse duration of 570 fs.
Li Wei - One of the best experts on this subject based on the ideXlab platform.
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graphene based q switched erbium doped fiber laser with wide Pulse Repetition Rate range
IEEE Photonics Technology Letters, 2012Co-Authors: Li Wei, Dapeng Zhou, H Y Fan, Wingki LiuAbstract:We demonstRated a novel graphene Q-switched erbium-doped fiber laser with wide Pulse-Repetition-Rate range. The Q-switched fiber laser is constructed with a 37-cm linear cavity formed by two fiber Bragg gratings, a section of highly doped erbium fiber, and a graphene saturable absorber. The laser has a low pump threshold of 16.9 mW, a wide range of Repetition Rate from 31.7 to 236.3 kHz, and minimum Pulse duration of 206 ns. The short-cavity laser structure enables laser action free of self-mode-locking effects.
Man Wu - One of the best experts on this subject based on the ideXlab platform.
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Nanosecond $Q$ -Switched Erbium-Doped Fiber Laser With Wide Pulse-Repetition-Rate Range Based on Topological Insulator
IEEE Journal of Quantum Electronics, 2014Co-Authors: Man Wu, Yu Chen, Han Zhang, Shuangchun WenAbstract:We demonstRated the generation of stable topological insulator nanosecond Q -switched erbium-doped fiber laser with wide Pulse Repetition Rate range. By virtue of the excellent saturable absorption property of the topological insulator saturable absorber, the Q -switched fiber laser with a section of high concentration erbium-doped fiber and two fiber Bragg gratings in a simple linear laser cavity can produce Q -switched Pulse with a wide range of Pulse Repetition Rate from 12.6 to 177.7 kHz, and minimum Pulse duration of 217 ns. This laser configuration enables laser operation free of self-mode-locking effects.
