1-mJ energy, 1-MW peak-power, 10-W average-power, spectrally narrow, diffraction-limited pulses from a photonic-crystal fiber amplifier

Brooks, Christopher D.; Teodoro, Fabio Di

doi:10.1364/opex.13.008999

Cited by 84 publications

(29 citation statements)

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“…Fibers doped with Yb have found uses both as amplifiers and lasers, producing high optical powers and pulse energies [1][2][3][4][5] . Due to this dopant's relatively simple band structure, Yb-doped fibers tend to have a high efficiency and experience reduced effects of excited state absorption and concentration quenching due to ion-ion interactions 5,6 .…”

Section: Introductionmentioning

confidence: 99%

Gamma radiation effects in Yb-doped optical fiber

Philip

Schneider

Simmons-Potter

et al. 2007

Fiber Lasers IV: Technology, Systems, and Applications

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Determination of the radiation response of doped-fiber laser materials, systems and components to relevant ionizing radiation fluxes is central to the prediction of long-term fiber-based laser performance/survivability in adverse and/or space-based environments. It is well known that optical elements that are placed into orbit around the Earth experience harsh radiation environments that originate from trapped-particle belts, cosmic rays, and solar events. Of particular interest to optical materials is the continuous flux of gamma photons that the materials encounter. Such radiation exposure commonly leads to the formation of color centers in a broad range of optical materials. Such color center formation gives rise to changes in optical transmission, loss and luminescent band structure, and, thus, impacts long-term optical device performance.In this paper we will present the results of our investigation of gamma-radiation-induced photodarkening on the passive optical transmittance of a number of ytterbium-(Yb-) doped optical fibers. We will discuss the evolution of the optical response of the fiber across the 1.0 to 1.6 micron wavelength window with increasing gamma exposure. Results indicate that these fibers exhibit reasonable radiation resistance to gamma exposures typical of a 5-year, low-earth-orbit environment. Maximum transmittance losses of less than 10% were observed for total gamma exposures of 2-5 krad (Si).

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Section: Introductionmentioning

confidence: 99%

Gamma radiation effects in Yb-doped optical fiber

Philip

Schneider

Simmons-Potter

et al. 2007

Fiber Lasers IV: Technology, Systems, and Applications

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“…15 In a pulsed amplifier configuration, this type of fiber has previously been shown to produce high energy pulses. [16][17][18] This fiber has been reported to produce up to 90 W of average power of 500 fs pulses at 0.9 MHz repetition rate corresponding to 100 μJ of pulse energy. 19 4 Rod-Type fibers Nonlinear effects is the main limiting factor for the achievable power levels in a fiber amplifier or laser, and as the nonlinear effects are length dependent, it is critical to minimize the fiber length.…”

Section: Polarizing Airclad Fibersmentioning

confidence: 99%

Airclad fiber laser technology

Hansen¹,

Olausson²,

Broeng³

et al. 2011

Opt. Eng

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Abstract. High-power fiber lasers and amplifiers have gained tremendous momentum in the last 5 years. Many of the 0091-3286/2011/$25.00 C 2011 SPIE traditional manufacturers of gas and solid-state lasers are now pursuing the fiber-based systems, which are displacing the conventional technology in many areas. High-power fiber laser systems require reliable fibers with large cores, stable mode quality, and good power handling capabilitiesrequirements that are all met by the airclad fiber technology. In the present paper we go through many of the building blocks needed to build high-power systems and we show an example of a complete airclad laser system. We present the latest advancements within airclad fiber technology including a new 100 μm single-mode polarization-maintaining rod-type fiber capable of amplifying to megawatt power levels. Furthermore, we describe the novel airclad-based pump combiners and their use in a completely monolithic 350 W cw fiber laser system with an M 2 of less than 1

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“…Amplification of nanosecond pulses lies in between, targeting the highest energy per pulse. In the past decade and in the nanosecond regime, many research teams have developed YDFA delivering nanosecond pulses with pulse energy over 1 mJ [22][23][24] and even 25 mJ using Yb-doped large mode area fibers [25][26]. All those results were achieved by cascading multiple YDFA pumped by laser diodes centered at 976 nm and working at a repetition rate around 10 kHz.…”

Section: Introductionmentioning

confidence: 99%

“…14a). Figure 14b presents the evolution of the pulse energy during 23 its propagation within the Nd:YAG rod, for the first and second amplification pass versus the pump power. Figure 15 displays the beam profile and the experimental evolution of the output pulse energy of our double-pass amplifier versus the peak power of the pump pulse when the energy of pre-amplified nanosecond seed pulse was 350 µJ.…”

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confidence: 99%

Compact nanosecond laser system for the ignition of aeronautic combustion engines

Amiard-Hudebine

Tison

Freysz

2016

Journal of Applied Physics

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We have studied and developed a compact nanosecond laser system dedicated to the ignition of aeronautic combustion engines. This system is based on a nanosecond microchip laser delivering 6 μJ nanosecond pulses, which are amplified in two successive stages. The first stage is based on an Ytterbium doped fiber amplifier (YDFA) working in a quasi-continuous-wave (QCW) regime. Pumped at 1 kHz repetition rate, it delivers TEM00 and linearly polarized nanosecond pulses centered at 1064 nm with energies up to 350 μJ. These results are in very good agreement with the model we specially designed for a pulsed QCW pump regime. The second amplification stage is based on a compact Nd:YAG double-pass amplifier pumped by a 400 W peak power QCW diode centered at λ = 808 nm and coupled to a 800 μm core multimode fiber. At 10 Hz repetition rate, this system amplifies the pulse delivered by the YDFA up to 11 mJ while preserving its beam profile, polarization ratio, and pulse duration. Finally, we demonstrate that this compact nanosecond system can ignite an experimental combustion chamber.

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1-mJ energy, 1-MW peak-power, 10-W average-power, spectrally narrow, diffraction-limited pulses from a photonic-crystal fiber amplifier

Cited by 84 publications

References 0 publications

Gamma radiation effects in Yb-doped optical fiber

Gamma radiation effects in Yb-doped optical fiber

Airclad fiber laser technology

Compact nanosecond laser system for the ignition of aeronautic combustion engines

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