Picosecond mid-infrared LIDAR system

Geiser, Péter; Wilier, Ulrike; Schade, Wolfgang

doi:10.1109/qels.2005.1549350

Cited by 4 publications

(4 citation statements)

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“…Nanosecond pulses with energies on the order of 100 mJ and tunable in the 1.5 -3.4 µm region are of interest for applications such as spectroscopy [1], remote sensing [2], biology and medicine [3], and material processing [4]. Optical parametric oscillators (OPOs) pumped by well-established, efficient lasers operating at 1 µm probably offer the simplest and most reliable way to generate such pulses.…”

Section: Introductionmentioning

confidence: 99%

5 mm thick periodically poled Rb-doped KTP for high energy optical parametric frequency conversion

Žukauskas¹,

Thilmann²,

Pasiskevicius³

et al. 2011

Opt. Mater. Express

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A 5 mm thick periodically poled bulk Rb-doped KTiOPO 4 (KTP) crystal with a period of 38.86 µm was fabricated by electric field poling. Chemical etching and optical evaluation show a high quality of the periodic ferroelectric domain structure through the whole crystal aperture. The fabricated quasi-phase matching (QPM) device was used in an optical parametric oscillator pumped at 1064 nm with 12 ns pulses at 100 Hz repetition rate to generate 60 mJ parametric radiation with a conversion efficiency of 50%.

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Section: Introductionmentioning

confidence: 99%

5 mm thick periodically poled Rb-doped KTP for high energy optical parametric frequency conversion

Žukauskas¹,

Thilmann²,

Pasiskevicius³

et al. 2011

Opt. Mater. Express

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“…High-energy mid-infrared sources are required for number of applications including spectroscopy [3], remote sensing [4], biology and medicine [5], material processing [6], standoff defense systems [7] and possibly others. Recent advances in laser technology made available efficient and robust, high energy, and good beam quality, diodepumped Q-switched and mode-locked lasers generating around 1 µm.…”

Section: Qpm Structures For High Energy and Broadband Parametric Gainmentioning

confidence: 99%

Advances in quasi phase-matched optical frequency converters

Pasiskevicius

Canalias

Gallo

et al. 2011

2011 XXXth URSI General Assembly and Scientific Symposium

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Recent advances in the growth of ferroelectric crystals with low optical losses and good structural consistency in particular KTiOPO 4 and stoichiomethic Mg:LiTaO 3 allowed a vast extension of applicability of quasi-phase-matched frequency converters. In this paper we overview recent advances in structuring these materials enabling high-energy pulse generation, extremely broadband parametric gain, and some unique applications in the quasi phase-matched crystals containing submicron-periodicity 1D structures as well as in 2D-structured crystals. IntroductionThis year, 2011, marks the 50-th anniversary of the first experimental demonstration of frequency conversion of what was then the recently invented Ruby laser by employing second harmonic generation in crystal quartz [1].Only one year later, in 1962, the seminal paper by J Armstrong and co-workers [2] proposed the principle of quasi phase-matching (QPM) as a generic method to increase the efficiency of second order interactions in different classes of materials. The QPM technique provides additional degrees of freedom allowing design of spatial and temporal properties of nonlinear interactions. Over the years, the additional capabilities afforded by the QPM techniques shifted focus in the field of nonlinear materials from the synthesis of new crystals with specific phasematching and nonlinear properties towards engineering of nonlinear interactions and refining materials which can take advantage of the QPM techniques. This shift was gradually happening over the last twenty years. The result is something which can be thought of as sort of nonlinear optics engineering toolbox which could be added to the existing and developing laser engineering methods.Regardless of apparent flexibility of the QPM techniques, its success critically depended on the initial material properties. Substantial effort over the last 10 years has been devoted to tailor the properties of the most popular oxide ferroelectrics used for QPM structure fabrication, KTiOPO 4 (KTP), LiNbO 3 (LN) and LiTaO 3 (LT). All these materials had different problems related to electrical properties, induced absorption, photorefraction, etc. These problems currently have been substantially alleviated or solved in principle either by appropriate doping, carefully tailored compositions of solid solutions of isomorphic compounds and/or modification of crystal stoichiometry. In our work we primarily utilize isomorphs of KTP and stoichiometric MgO-doped LT (Mg:SLT) for engineered nonlinear structures due to the high optical damage thresholds, low coercive fields and, importantly, possibility to fabricate periodic structures on the submicrometer scale. As will be shown in the presentation such structures enable realization of novel types of devices having no counterparts in the realm of birefringence phasematched nonlinear interactions. QPM structures for high energy and broadband parametric gainHigh-energy mid-infrared sources are required for number of applications including spectroscopy [3], remote sens...

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“…High-power 2-5 µm spectral range mid-infrared (MIR) laser source contains an important atmospheric transmission window and covers the characteristic absorption spectrum of many molecules. MIR radiation is therefore widely used in many fields, including lidar, optical countermeasure, micromachining, environment monitoring, and medical diagnostics [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

High brightness widely tunable, hundred picosecond mid-IR MgO:PPLN optical parametric oscillator with short cavity

Li,

Zhang,

Wang

et al. 2024

Laser Phys.

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A high brightness hundred picosecond (ps) mid-infrared tunable optical parametric oscillator (OPO) based on MgO doped periodically poled lithium niobate (MgO: PPLN) was demonstrated. The pumping source was provided by a cascade amplified microchip laser at 10 kHz with pulse width of 466 ps. The idler wavelength tuning from 2.8 to 4.3 μm was achieved by the combination of period and temperature tuning. The maximum idler average output power was 262 mW at 2.8 μm with a pulse duration of 252 ps, corresponding to 6.7% conversion efficiency. The average beam quality factor was measured to be M 2 = 2.46, resulting in a brightness value of 0.55 MW sr cm−2. Pulse width of 209 ps at 4.3 μm, which was the shortest pulse width from a short cavity OPO to our best knowledge.

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Picosecond mid-infrared LIDAR system

Abstract: With a picosecond mid-infrared LIDAR system based on a pulsed difference-frequency generation laser system concentrations of methane are measured in the plume of an aircraft engine.

Cited by 4 publications

References 1 publication

5 mm thick periodically poled Rb-doped KTP for high energy optical parametric frequency conversion

5 mm thick periodically poled Rb-doped KTP for high energy optical parametric frequency conversion

Advances in quasi phase-matched optical frequency converters

High brightness widely tunable, hundred picosecond mid-IR MgO:PPLN optical parametric oscillator with short cavity

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