High-energy Nd : YAG-amplification system for OPCPA pumping

Adamonis, Jonas; Antipenkov, Roman; Kolenda, J.; Michailovaś, Andrejus; Piskarskas, A.; Varanavičius, A.

doi:10.1070/qe2012v042n07abeh014689

Cited by 11 publications

(8 citation statements)

References 3 publications

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“…A volume Bragg grating (VBG) (OptiGrate, Corp.) narrows the spectral bandwidth in the regenerative amplifier to the 10-pm-linewidth level and thereby produces a transform-limited duration of 200 ps (FWHM) similar to [20,22]. In the current configuration, the 200 ps pulse duration is seen as a trade-off, similar to other MOPA systems [1,13,16,19,23,24], between a long pulse duration (several nanoseconds) for efficient power extraction from the solid-state amplifiers and the OPCPA application with an optimum duration of less than 100 ps. This duration remains constant throughout the MOPA chain, providing the opportunity to shorten (or lengthen) the duration of the output pulses by replacing the intracavity VBG with one having a wider (or narrower) bandwidth.…”

Section: Hybrid Ultrafast/fiber/solid-state Amplifier Chainmentioning

confidence: 90%

Hybrid master oscillator power amplifier system providing 10 mJ, 32 W, and 50 MW pulses for optical parametric chirped-pulse amplification pumping

et al. 2013

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We present a high-energy, high-average-power picosecond laser system based on a hybrid chain in a master oscillator power amplifier configuration. The chain is seeded by a Ti:sapphire oscillator, followed by a Ybdoped fiber preamplifier, a Nd:YAG-based regenerate amplifier, and a Nd:YVO 4-based single-pass amplifier. The final diode-pumped, solid-state amplifier is detailed and produces pulses with more than 10 mJ energy at 32 W average power with 207 ps duration, corresponding to 50 MW peak power. The picosecond pulse output is seeded and optically synchronized with the sub-5-fs oscillator for optical parametric chirped-pulse amplification pumping.

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Section: Hybrid Ultrafast/fiber/solid-state Amplifier Chainmentioning

confidence: 90%

Hybrid master oscillator power amplifier system providing 10 mJ, 32 W, and 50 MW pulses for optical parametric chirped-pulse amplification pumping

et al. 2013

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“…It comprises the tandem diode pumped Nd:YAG regenerative amplifiers and a flash lamp pumped Nd:YAG power amplifier. The femtosecond seed pulse after amplification system was stretched in time up to ~75 ps duration due to gain narrowing in the Nd:YAG laser media and due to the spectral filtering effect of multiple intracavity Fabry-Perot etalons placed inside regenerative amplifier cavities (for details see [30]). The Nd:YAG power amplifier boosted pulse energy up to 500 mJ at a repetition rate of 10 Hz.…”

Section: Experimental Set-upmentioning

confidence: 99%

Formation of flat-top picosecond pump pulses for OPCPA systems by cascade second harmonic generation

Adamonis¹,

Antipenkov²,

Kolenda³

et al. 2012

Lith. J. Phys.

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We report on the method for picosecond pulse envelope shaping that is based on pulse temporal profile transformations during the cascade second harmonic generation. It was demonstrated theoretically and experimentally that under a particular second harmonic generation condition, e. g. pump pulse intensity and crystal length, the 1064 nm pump pulses with a temporal profile close to the Gaussian one and pulse width of 75 ps at FWHM can be converted to pulses of fundamental and second harmonics with the super-Gaussian temporal profile having an intensity plateau region extending over a ~100 ps time interval when conversion efficiency in the first stage of the harmonic generator was around 45-50%. Our proposed shaping method is particularly suitable for the application in the multistage OPCPA pumped by the second harmonic of Nd:YAG laser radiation.

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“…The most widely used method relies on spatiotemporal pump pulse shaping [26][27][28][101][102][103][104][105]. The ideal pump shape for OPCPA has a spatiotemporally flat-top intensity distribution as it provides equal gain at every spatial and temporal coordinate, and such pump pulse could be depleted almost uniformly.…”

Section: Conversion Efficiency Of Opcpamentioning

confidence: 99%

“…Furthermore, the properties of the amplified signal are highly sensitive on the pump pulse quality [24,25], which challenges pump technology. The ideal spatiotemporal pulse shape for pumping and seeding OPCPA is a cylinder, which is not straightforward to engineer [26][27][28]. Additionally to these, the pump-to-signal conversion efficiency in OPCPA is usually 10-25% [15,[29][30][31], while in Ti:sapphire based CPA systems, 50% can be reached with minor efforts [12,19,32,33].…”

Section: Introductionmentioning

confidence: 99%

“…This is one of the main reasons why most of the PW-class systems are based on CPA and not OPCPA. In the beginning, the spread of high peak power OPCPA systems was mainly prevented by the availability of suitable pump lasers, which provide high spatiotemporal quality pump pulses. This issue was overcome by the maturing of 1 µm pump technology, mostly relying on Nd:YAG [28], Yb:YAG [34] and Nd:glass [35] lasers. Nowadays, the second-harmonics of these lasers can provide highly stable pump pulses with flat-top intensity distribution, which is ideal for driving OPCPA.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of high peak power few-cycle optical parametric chirped pulse amplifier systems

Tóth

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OPCPA systems are capable of delivering high peak and average power pulses, consisting of only a few oscillation cycles of the electric field. The development of these systems are motivated by attosecond pulse generation and the examination of ultrafast physical processes. During my work I was using a 4D numerical code for the modelleding of OPCPA. I have examined a few OPA arrangements, which can increase the efficiency of the amplification process and the bandwidth of the amplified pulses. I have numerically optimized the OPCPA of the ELI-ALPS SYLOS system and carried out a comparative study of a mid-IR OPCPA system.

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High-energy Nd : YAG-amplification system for OPCPA pumping

Cited by 11 publications

References 3 publications

Hybrid master oscillator power amplifier system providing 10 mJ, 32 W, and 50 MW pulses for optical parametric chirped-pulse amplification pumping

Hybrid master oscillator power amplifier system providing 10 mJ, 32 W, and 50 MW pulses for optical parametric chirped-pulse amplification pumping

Formation of flat-top picosecond pump pulses for OPCPA systems by cascade second harmonic generation

Optimization of high peak power few-cycle optical parametric chirped pulse amplifier systems

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