High power passively Q-switched ytterbium fiber laser with Cr^4+:YAG as a saturable absorber

Huang, J. Y.; Liang, H. C.; Su, Kuan-Wei; Chen, Yung-Fu

doi:10.1364/oe.15.000473

Cited by 41 publications

(15 citation statements)

References 25 publications

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“…The full-width-half-maximum (FWHM) width of each individual peak was 1.0ns. The pulse profiles are similar to profiles that others have reported in passively Q-switched ytterbium fiber lasers [10,11], except that we observed significant fluctuations in the energy distribution between the peaks (not stable mode locking). The peak UV power exceeded 8kW, and the calculated UV peak intensity inside the BBO was ~1.6GW/cm 2 .…”

Section: Laser Performancesupporting

confidence: 88%

Compact frequency-quadrupled pulsed 1030nm fiber laser

et al. 2016

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A compact 1030nm fiber laser for ultraviolet generation at 257.5nm is presented. The laser employs a short length of highly-doped, large core (20µm), coiled polarization-maintaining ytterbium-doped double-clad fiber pumped by a wavelength-stabilized 975nm diode. It is passively Q-switched via a Cr 4+ :YAG saturable absorber and generates 2.4W at 1030nm in a 110µJ pulse train. Lithium triborate (LBO) and beta-barium borate (BBO) are used to achieve 325mW average power at the fourth harmonic. The laser's small form factor, narrow linewidth and modest power consumption are suitable for use in a man-portable ultraviolet Raman explosives detection system.

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Section: Laser Performancesupporting

confidence: 88%

Compact frequency-quadrupled pulsed 1030nm fiber laser

et al. 2016

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“…Figure 7 shows the variation of output pulse duration as a function of pump power. It shows that output pulse duration decreases with increase in input pump power, which is typically observed in Q-switched lasers 9 . Figure 8 shows the recorded output spectrum at the maximum output average power of 1.2 W. The output spectrum was peaked at 1068 nm with a FWHM linewidth of ~ 2.5 nm.…”

Section: Resultsmentioning

confidence: 62%

Realization and analysis of a 150-W peak-power single transverse mode passively Q-switched Yb-doped double-clad fiber laser

et al. 2010

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We report on the realization and analysis of a 150 W peak-power passively Q-switched Yb-doped double-clad fiber laser with 30 μJ pulse energy, and 205 ns pulse duration using Cr 4+ :YAG saturable absorber. Analysis of the effect of mode area inside the saturable absorber on pulse characteristics has also been carried out.Fiber laser, Yb-doped fiber, passive Q-switch, pulsed laser, saturable absorber, Re-imaging magnification INTRODUCTIONPulsed fiber lasers have attracted attention in several applications due to their high-peak power and short-duration pulses. Passive Q-switching is an efficient technique to generate high energy and high-peak power pulses. Further, passively Q-switched lasers are more compact and lower in cost than actively Q-switched lasers. Cr 4+ :YAG and AlGaInAs quantum wells have been effectively used for passive Q-switching of Yb-doped fiber lasers 1 . Co 2+ :ZnSe and Cr 2+ :ZnSe have been demonstrated as saturable absorbers for passive Q-switching of Er 3+ -doped 2 and Tm 3+ -doped fiber lasers 3 , respectively. Use of saturable absorber along with stimulated Brillouin scattering (SBS) has also been demonstrated to generate short duration pulses 4 . Huang et al. have reported generation of up to ~ 0.35 mJ pulse energy with 70 ns pulse duration from passively Q-switched Yb-doped fiber laser using Cr 4+ :YAG saturable absorber 1 . Further, Pan et al. have exploited Cr 4+ :YAG in combination with distributed SBS to generate ~375 kW peak power with 490 ps pulse duration 4 . However, there is still scope to understand physical mechanism involved in passive Q-switching and to achieve smooth pulses with better pulse to pulse stability. In this paper, we report on the realization of a passively Qswitched Yb-doped double-clad fiber (YDDC) laser using a single mode YDDC fiber of 5.5 μm mode field diameter and 125 μm inner clad diameter, which is compatible with standard fiber optic components used in optical communication; and Cr 4+ :YAG is used as the saturable absorber (SA). We have also carried out an analysis of the effect of mode area inside the saturable absorber on output pulse characteristics; and study of the variation in pulse energy, pulse frequency and pulse duration as a function of input pump power.

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“…The other alternative is the passive Q-switching using a saturable absorber (SA) in laser cavity that offers much simpler design as compared to the active Q-switching. Huang et al reported recently a passively Q-switched Yb-doped fiber laser with Cr4+: YAG as an SA and achieve a high peak power of 20 kW [9]. However their laser consists of a Cr4+: YAG slab, three collimating and focus lenses, and a mirror that complicated substantially the laser cavity design.…”

Section: All-fiber Q-switched Yb-doped Fiber Lasermentioning

confidence: 99%

Second Harmonic Generation Using an All‐Fiber Q‐Switched Yb‐Doped Fiber Laser and MgO:c‐PPLN

Gan

Koo

et al. 2008

Advances in OptoElectronics

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We have experimentally demonstrated an efficient all-fiber passively Q-switched Yb-doped fiber laser with Samarium doped fiber as a saturable absorber. Average output power of 3.4 W at a repetition rate of 250 kHz and a pulse width of 1.1 microseconds was obtained at a pump power of 9.0 W. By using this fiber laser system and an MgO-doped congruent periodically poled lithium niobate (MgO:c-PPLN), second harmonic generation (SHG) output at 532 nm was achieved at room temperature. The conversion efficiency is around 4.2% which agrees well with the theoretical simulation.

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High power passively Q-switched ytterbium fiber laser with Cr^4+:YAG as a saturable absorber

Cited by 41 publications

References 25 publications

Compact frequency-quadrupled pulsed 1030nm fiber laser

Compact frequency-quadrupled pulsed 1030nm fiber laser

Realization and analysis of a 150-W peak-power single transverse mode passively Q-switched Yb-doped double-clad fiber laser

Second Harmonic Generation Using an All‐Fiber Q‐Switched Yb‐Doped Fiber Laser and MgO:c‐PPLN

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