High-energy 139 nm table-top soft-x-ray laser at 25 Hz repetition rate excited by a slab-pumped Ti:sapphire laser

Martz, Dale; Alessi, D.; Luther, B. M.; Wang, Y.; Kemp, D.; Berrill, M.; Rocca, J. J.

doi:10.1364/ol.35.001632

Cited by 41 publications

(15 citation statements)

References 19 publications

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“…The average pulse energy is 8.1µJ and the shot-to-shot energy variation is characterized by a standard deviation of 12%. We have also observed a shot to shot variation as low as ~8% [8]. This relatively high shot-to-shot laser energy stability for a plasma amplifier is the result of the highly saturated regime of operation of this soft x-ray laser amplifier.…”

mentioning

confidence: 64%

Table-top soft X-ray laser operating at 13.9 nm with increased average power

Martz

Alessi

Luther

et al. 2010

2010 IEEE Photinic Society's 23rd Annual Meeting

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We have demonstrated a λ=13.9 nm table-top laser with pulse energies above 10 μJ in a laser created Ag plasma. Operation at 2.5 Hz resulted in an average power of 20 μW.There is significant interest in the table-top generation of high average power coherent soft x-ray light for applications. Table-top soft x-ray lasers with wavelengths in the 13 nm spectral region have produced picosecond laser pulses with energy of ~1 μJ and average powers up to 2 μW when operating at 5 Hz repetition rate [1,2]. Significantly larger soft x-ray laser pulse energies, of ~10-25 μJ at a rate of one laser shot every several minutes have been produced using powerful pump lasers [3,4]. Herein we report a very significant increase in laser pulse energy of muti-Hz table top soft x-ray laser in the 13 nm spectral region. We have developed a table-top laser that is capable of producing laser pulses with energies above 10 µJ and an average power of 20 μW at 2.5 Hz repetition rate. With an average power of ~20 uW this laser will make possible new applications of coherent soft x-ray light on a table-top.The soft x-ray laser pulses are generated in a narrow line focus Ag plasma heated by a sequence of pulses generated by a chirped pulse amplification Ti:Sapphire laser. The pump laser consists of a Kerr mode-locked laser oscillator and three stages of amplification. The third amplification stage is pumped by a high energy frequencydoubled Nd-glass slab laser developed in house, designed to operate at a repetition rate of several Hz (Fig 1). The front end of this pump laser consists of a q-switched Nd:YLF oscillator that is subsequently amplified in two double-pass Nd: YLF rods. The output of the pre-amplifier is split into two beam and each of them is amplified by 8 passes thought a flash-lamp pumped Nd:glass slab amplifier (Fig 1.b). The output of each arm is frequency doubled in a KD*P crystal to produce up to 10 J of λ = 532 nm light, which is relay imaged into the third stage Ti:sapphire amplifier rod. Three pass amplification in this amplifier produces λ = 800 nm laser pulses with up to 7.5 J energy at 2.5 Hz repetition rate. Fig 1. Top left: Block diagram of the third amplification stage of the Ti:sapphire laser used to pump the soft x-ray laser. Bottom: Schematic diagram of the 8-pass Nd-glass slab amplifier used to pump the Ti:sapphire rod. Right: Intensity distribution of 7.5 J Ti:sapphire laser pulse on the laser rod.The soft x-ray laser experiments at 13.9 nm were conducted focusing up to 4.9 J of Ti:Sapphire laser energy into a line focus ~30 μm wide and 6.3 mm in length on the surface of a 8 mm wide Ag slab target. Part of the output energy from the third amplification stage is directed to a pre-pulse arm using a 40% beam splitter. The rest of the 339 978-1-4244-5369-6/10/$26.00 ©2010 IEEE

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confidence: 64%

Table-top soft X-ray laser operating at 13.9 nm with increased average power

Martz

Alessi

Luther

et al. 2010

2010 IEEE Photinic Society's 23rd Annual Meeting

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“…Interest in the development of short pulse, high peak power lasers is important to a number of industrial and scientific applications including biomedical processes [3], material science [4], inertial confinement fusion [5], and table-top soft x-ray laser generation [6]. In order for short pulse lasers to be useful for many applications, amplification of the pulse energy is necessary.…”

Section: Pulsed Solid State Lasersmentioning

confidence: 99%

“…the pulse produced by the CPA system are amplified to above the Joule level, and focused into a small line on the target creating a plasma column. The plasma can be created with the correct atomic conditions for extreme ultraviolet or soft x-ray amplification which in turn define the requirements of the pump pulse [28,6]. Previous and contemporary work in diode pumped Yb based CPA systems is discussed next.…”

Section: Diode-pumped Yb:yag Cpa Systemsmentioning

confidence: 99%

Demonstration of a compact 100 Hz, 01 J, diode-pumped picosecond laser

et al. 2011

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SOLID STATE DIODE-PUMPED SHORT PULSE LASERIn this work I present an all laser diode pumped chirped pulse amplification laser system that is capable of producing 100 mJ laser pulses at 100 Hz repetition rate with durations of under 5 ps. The primary focus of this work consists of the development of two amplification stages that boost the temporally stretched pulses from a few hundred picoJoules to more than 100 mJ. The first amplifier is a Yb:YAG based regenerative amplifier operated at room temperature, which amplifies the pulses by a factor of about 10 6 . The second stage is a multi-pass, Yb:YAG based amplifier, which is operated at cryogenic temperatures, and further amplifies the pulses by a factor of about 100. This is the first time a combination of room temperature and cryogenically cooled Yb:YAG amplifiers has been demonstrated. The room temperature pre-amplifier maintains more bandwidth than in the cryogenic case for increased compressibility. The cryogenic cooling of the power amplifier allows for increased heat dissipation and decreased saturation intensity for efficient operation. The optical efficiency of this amplifier is higher than that of other diode-pumped systems of comparable energy.ii

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“…[1][2][3][4][5][6][7][8] Lots of developments of ultrashort high power lasers have been carried out with progress in ultrashort laser technologies such as chirped pulse amplification. [9][10][11][12][13] The interaction of an intense short laser pulse with under dense plasma can produce accelerating gradients, thousands of times, higher than conventional accelerators.…”

Section: Introductionmentioning

confidence: 99%

Effect of nonlinear chirped Gaussian laser pulse on plasma wake field generation

Afhami

Eslami

2014

AIP Advances

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An ultrashort laser pulse propagating in plasma can excite a nonlinear plasma wake field which can accelerate charged particles up to GeV energies within a compact space compared to the conventional accelerator devices. In this paper, the effect of different kinds of nonlinear chirped Gaussian laser pulse on wake field generation is investigated. The numerical analysis of our results depicts that the excitation of plasma wave with large and highly amplitude can be accomplished by nonlinear chirped pulses. The maximum amplitude of excited wake in nonlinear chirped pulse is approximately three times more than that of linear chirped pulse. In order to achieve high wake field generation, chirp parameters and functions should be set to optimal values.

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High-energy 139 nm table-top soft-x-ray laser at 25 Hz repetition rate excited by a slab-pumped Ti:sapphire laser

Cited by 41 publications

References 19 publications

Table-top soft X-ray laser operating at 13.9 nm with increased average power

Table-top soft X-ray laser operating at 13.9 nm with increased average power

Demonstration of a compact 100 Hz, 01 J, diode-pumped picosecond laser

Effect of nonlinear chirped Gaussian laser pulse on plasma wake field generation

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