Frequency-doubling in femtosecond laser inscribed periodically-poled potassium titanyl phosphate waveguides

Campbell, Stuart; Thomson, Robert R.; Hand, Duncan Paul; Kar, A. K.; Reid, Derryck T.; Canalias, Carlota; Pasiskevicius, Valdas; Laurell, Fredrik

doi:10.1364/oe.15.017146

Cited by 38 publications

(27 citation statements)

References 13 publications

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“…It is also employed in a variety of frequency conversion applications. Considerable attention has been paid to the fabrication of waveguides in other nonlinear crystals [8], such as active-ion-doped YAG [9,10], KTiOPO 4 [11,12], and LiNbO 3 [13][14][15][16][17]. But successful demonstration has not been possible in KDP [18].…”

Section: Introductionmentioning

confidence: 99%

Waveguide fabrication in KDP crystals with femtosecond laser pulses

et al. 2014

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Optical waveguides fabricated in potassium dihydrogen phosphate (KDP) by ultrafast laser pulses are demonstrated. Dependent on the incident pulse energy, two different types of refractive index modification have been induced. For moderate laser powers, type I homogeneous waveguides are created. At higher pulse energies, type II waveguides are formed in the stressed area surrounding regions of laser-induced damage. Double-line and four-line structures are applied to the type II guides to increase mode confinement. Polarization sensitivity and transmission properties of the written waveguides are characterized and discussed. The results indicate that high-quality waveguides can be fabricated in KDP, which has potential for further applications in nonlinear integrated-optics.

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Section: Introductionmentioning

confidence: 99%

Waveguide fabrication in KDP crystals with femtosecond laser pulses

et al. 2014

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“…The majority of such applications require manufacture of optical waveguides (WGs) to confine light propagation in reduced volumes, thus reaching high light intensities. As one of the most efficient techniques for threedimensional volume micro-structuring of transparent dielectrics, the femtosecond (fs) laser inscription method [2,3] has been widely applied to fabricate optical WGs in numerous optical materials, including optical crystals [4][5][6][7][8][9][10][11], ceramics, glasses and polymers. The possibility of inscribing arbitrarily shaped WGs in the bulk of various crystals has allowed for new geometrical degrees of freedom in the design of integrated optical devices.…”

Section: Introductionmentioning

confidence: 99%

Control of the properties of micro-structured waveguides in lithium niobate crystal

Karakuzu¹,

Dubov²,

Boscolo³

2013

Opt. Express

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“…Among them, the frequency conversion of the laser is very important. 3,4 Indeed, frequency doubled lasers represent an attractive alternative to other laser tools for many material processing applications, though to date frequency doubling with pulsed lasers has only been performed using pulses in the range of tens of nanoseconds. In material processing with longer pulses, this laser-material interaction is different and, in particular, higher material ablation rates are required.…”

Section: Introductionmentioning

confidence: 99%

Resonant third-harmonic generation of a short-pulse laser from electron-hole plasmas

2012

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In semiconductors, free carriers are created in pairs in inter-band transitions and consist of an electron and its corresponding hole. At very high carrier densities, carrier-carrier collisions dominate over carrier-lattice collisions and carriers begin to behave collectively to form plasma. Here, we apply a short-pulse laser to generate third-harmonic radiation from a semiconductor plasma (electron-hole plasma) in the presence of a transverse wiggler magnetic-field. The process of third-harmonic generation of an intense short-pulse laser is resonantly enhanced by the magnetic wiggler, i.e., wiggler magnetic field provides the necessary momentum to third-harmonic photons. In addition, a high-power laser radiation, propagating through a semiconductor imparts an oscillatory velocity to the electrons and exerts a ponderomotive force on electrons at the third-harmonic frequency of the laser. This oscillatory velocity produces a third-harmonic longitudinal current. And due to the beating of the longitudinal electron velocity and the wiggler magnetic field, a transverse third-harmonic current is produced that drives third-harmonic electromagnetic radiation. It is finally observed that for a specific wiggler wave number value, the phase-matching conditions for the process are satisfied, leading to resonant enhancement in the energy conversion efficiency.

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Frequency-doubling in femtosecond laser inscribed periodically-poled potassium titanyl phosphate waveguides

Cited by 38 publications

References 13 publications

Waveguide fabrication in KDP crystals with femtosecond laser pulses

Waveguide fabrication in KDP crystals with femtosecond laser pulses

Control of the properties of micro-structured waveguides in lithium niobate crystal

Resonant third-harmonic generation of a short-pulse laser from electron-hole plasmas

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