Study of efficient optical parametric generation in KTP crystal as pump source for DAST-DFG
Kouji NawataYoshiki MiyakeShin’ichiro HayashiT. NotakeHiroshi KawamataTakeshi MatsukawaFeng QiHiroaki Minamide
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We have developed injection-seeded KTP optical parametric generator for DAST-DFG terahertz-wave source. Using a microchip Nd:YAG laser, the energy conversion efficiency of 10% and peak-power output of 2.5 MW were obtained at 1300 nm.Keywords:
Optical Pumping
Optical parametric amplifier
Potassium titanyl phosphate
Crystal (programming language)
In this paper, a comparison is made between the gain response of a quantum-dot semiconductor optical amplifier (QD-SOA) under three different pumping schemes (optical, electrical, and electro-optical). We found that under equal pumping powers, the electrical pumping scheme is more efficient than optical and electro-optical ones. Simulation results show that the electrical pumping scheme not only provides a higher optical gain compared to two other schemes, but also reduces the gain recovery time of the QD-SOA. Furthermore, the practical implementation of electrical pumping scheme is much simpler than two other ones.
Optical Pumping
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The relative gain intensity and corresponding permitted parametric of optical parametric oscillator based on periodically poled RbTiOAsO 4 (PPRTA) have been analyzed and simulated. The permitted grating period of PPRTA was compared with those of periodically poled lithium niobate (PPLN) and periodically poled potassium titanyl phosphate (PPKTP).
Potassium titanyl phosphate
Optical parametric amplifier
Parametric oscillator
Spontaneous parametric down-conversion
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We have investigated second-harmonic generation in short- period periodically-poled bulk and waveguide potassium titanyl phosphate crystals to generate blue light using subpicosecond laser pulses. For the bulk, the maximum conversion efficiency is approximately equals 5.5%, which is about two orders of magnitude larger than that achieved previously. For the waveguide, the maximum conversion efficiency is approximately equals 32%, which is about a factor of 4 higher than that obtained before. These measured values are in good agreement with our theoretical results. We have observed saturation of conversion efficiency, which sets a limit to the maximum conversion efficiency that can be obtained.
Potassium titanyl phosphate
Waveguide
Saturation (graph theory)
Frequency Conversion
Blue laser
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The optical parametric effect based on third-order nonlinearity in fibers and semiconductor optical amplifiers has been applied to ultrafast all-optical signal processing. We describe recent experimental results on wavelength conversion, gate switching, and parametric amplification.
Optical parametric amplifier
SIGNAL (programming language)
Semiconductor optical gain
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Potassium titanyl phosphate
Optical parametric amplifier
Degeneracy (biology)
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We have demonstrated a high-gain optical parametric chirped-pulse amplifier for Nd:glass-based short-pulse laser systems based on periodically poled potassium-titanyl-phosphate. Our amplifier produced high single-pass gain, broad bandwidth, excellent beam quality and stability.
Potassium titanyl phosphate
Optical parametric amplifier
Chirped pulse amplification
Regenerative amplification
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We have demonstrated a high-gain optical parametric chirped-pulse amplifier for Nd:glass-based short-pulse laser systems based on periodically poled potassium-titanyl-phosphate. Our amplifier produced high single-pass gain, broad bandwidth, excellent beam quality and stability.
Potassium titanyl phosphate
Optical parametric amplifier
Chirped pulse amplification
Regenerative amplification
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We have investigated second-harmonic generation in short-period periodically-poled bulk and waveguide potassium titanyl phosphate crystals to generate blue light using subpicosecond laser pulses. For the bulk, the highest conversion efficiency is ≈5.5%, which is about two orders of magnitude larger than that achieved previously. For the waveguide, the highest conversion efficiency is ≈32%, which is about a factor of 4 higher than that obtained before. These measured values are in good agreement with our theoretical results. We have observed saturation of conversion efficiency, which sets a limit to the maximum efficiency that can be achieved.
Potassium titanyl phosphate
Waveguide
Saturation (graph theory)
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A picosecond laser system that will generate high-power tunable IR pulses with bandwidths suitable for spectroscopic applications is discussed. The system is based on white-light continuum generation in ethylene glycol and optical parametric amplification in potassium titanyl phosphate. The nonlinear-optical processes are driven by a regeneratively amplified Ti:sapphire laser that produces 1.7-ps pulses at a repetition rate of 1 kHz. Energies as high as 40 and 12 μJ have been achieved over the signal (1.02–1.16-μm) and idler (2.6–3.7-μm) tuning ranges, respectively. The IR beam temporal and spatial characteristics are also presented.
Potassium titanyl phosphate
Optical parametric amplifier
Picosecond
Chirped pulse amplification
Regenerative amplification
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In this study, the effect of increasing pump pulse energy and delay time on the energy conversion efficiency of the Potassium Titanyl Phosphate (KTP) crystal at room temperature was investigated. It was found that the higher the pump pulse the greater the efficiency at a certain value of the delay time. Moreover, at the delay time 3.524ns, we found that the efficiency of the conversion of energy increases from 0.0112 to 0.0159. We also observed that the lower delay time between the pump and the probe pulses leads to increase the rate of energy conversion efficiency of the KTP crystal, where the reaches up to 3, which is higher than the value recorded in the absence of a pump pulse. The highest value of the rate of energy conversion efficiency recorded in this study was 0.0159. This work was achieved at room temperature.
Potassium titanyl phosphate
Energy transformation
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