Efficient second, third, fourth, and fifth harmonic generation of a Yb-doped fiber amplifier

Kliner, Dahv A. V.; Teodoro, Fabio Di; Koplow, Jeffrey P.; Moore, Samuel W.; Smith, Arlee V.

doi:10.1016/s0030-4018(02)01825-4

Cited by 65 publications

(24 citation statements)

References 20 publications

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“…Figure 4 shows a schematic of the free-space beam path. The scheme used is identical to that reported by Koplow et al (2002). A zero-order half-wave plate controls the polarization of the fundamental before it passes through a type-II phase-matched potassium titanyl phosphate (KTP) crystal (3 × 3 × 10 mm) to generate the second harmonic.…”

Section: Laser Subsystemmentioning

confidence: 99%

A laser-induced fluorescence instrument for aircraft measurements of sulfur dioxide in the upper troposphere and lower stratosphere

et al. 2016

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Abstract. This work describes the development and testing of a new instrument for in situ measurements of sulfur dioxide (SO 2 ) on airborne platforms in the upper troposphere and lower stratosphere (UT-LS). The instrument is based on the laser-induced fluorescence technique and uses the fifth harmonic of a tunable fiber-amplified semiconductor diode laser system at 1084.5 nm to excite SO 2 at 216.9 nm. Sensitivity and background checks are achieved in flight by additions of SO 2 calibration gas and zero air, respectively. Aircraft demonstration was performed during the NASA VolcanoPlume Investigation Readiness and Gas-Phase and Aerosol Sulfur (VIRGAS) experiment, which was a series of flights using the NASA WB-57F during October 2015 based at Ellington Field and Harlingen, Texas. During these flights, the instrument successfully measured SO 2 in the UT-LS at background (non-volcanic) conditions with a precision of 2 ppt at 10 s and an overall uncertainty determined primarily by instrument drifts of ±(16 % + 0.9 ppt).

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Section: Laser Subsystemmentioning

confidence: 99%

A laser-induced fluorescence instrument for aircraft measurements of sulfur dioxide in the upper troposphere and lower stratosphere

et al. 2016

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“…This source was frequency doubled, tripled, quadrupled, and quintupled to produce light in the visible and UV spectral regions (532 nm − 213 nm). 6 The high peak power and beam quality of the mode-filtered amplifier provided very high nonlinear conversion efficiencies (e.g., 52% for 1064 → 532 nm, and 50% for 532 → 266 nm).…”

Section: Figurementioning

confidence: 99%

Power scaling of rare-earth-doped fiber sources

Kliner¹,

Koplow²

2005

SPIE Proceedings

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Single-mode (SM) fiber lasers and amplifiers are constrained to low output powers by fundamental physical limitations of the fiber, specifically, by low energy storage and by the onset of nonlinear processes in the fiber. The simplest way to overcome both limiting factors is to increase the core size, but maintaining SM operation imposes an upper limit. Further power scaling is possible with multimode (MM) fiber, but the poor beam quality generally associated MM fiber is unacceptable for many applications. We have developed a technique (bend-loss-induced mode filtering) that allows the core size to be increased significantly beyond the SM limit while maintaining diffraction-limited beam quality and high efficiency. In this method, coiling of the fiber is used as a form of distributed spatial filtering to suppress all but the fundamental mode of a highly MM fiber amplifier. Unlike conventional spatial filtering, in which high-order modes are discarded, the mode-filtering technique does not result is substantial loss of efficiency because high-order modes are suppressed along the entire length of the amplifier and are thus prevented from building up significant intensity. We will review this method and recent experimental results for both cw and pulsed fiber sources, including nonlinear frequency conversion of mode-filtered fiber lasers. Optical damage issues will also be discussed.

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“…Potassium dihydrogen phosphate (KDP) and deuterated KDP (DKDP) are two kinds of good nonlinear optical (NLO) materials used in second harmonic generation (SHG), third harmonic generation (THG), and fourth harmonic generation (FHG) . As development of inertial cofinement fusion (ICF) and demand for FHG rises, ammonium dihydrogen phosphate (ADP) crystals show promising prospects .…”

Section: Introductionmentioning

confidence: 99%

Investigation on Improving ADP Crystals’ Thermal Stability for Noncritical Phase‐Matching Fourth Harmonic Generation Application

Wang

Teng

et al. 2018

Crystal Research and Technology

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Ammonium dihydrogen phosphate (ADP) crystals have higher fourth harmonic generation (FHG) efficiency than deuterated potassium dihydrogen phosphate (DKDP) crystals, because of the higher nonlinear optical coefficient. However, the narrower full-width at half-maximum (FWHM) temperature bandwidth and poor thermal stability limited the application in the noncritical phase-matching (NCPM) FHG. In this article, ADP and a series of deuterated ADP (DADP) crystals are grown through point-seed rapid growth method to investigate a feasible experimental condition on improving ADP crystals' thermal stability for NCPM FHG application. The deuterium doping experiment results indicate that the 60% DADP crystal could accommodate more laser-induced heat capacity during FHG processing and could achieve higher FHG output, but with poor thermal stability. Therefore, 60% DADP crystal's FHG stability measured by air indirect heating method. About 7% more stable FHG output is obtained than direct heating by copper, which is more suitable for FHG stability of ADP/DADP crystals.

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Efficient second, third, fourth, and fifth harmonic generation of a Yb-doped fiber amplifier

Cited by 65 publications

References 20 publications

A laser-induced fluorescence instrument for aircraft measurements of sulfur dioxide in the upper troposphere and lower stratosphere

A laser-induced fluorescence instrument for aircraft measurements of sulfur dioxide in the upper troposphere and lower stratosphere

Power scaling of rare-earth-doped fiber sources

Investigation on Improving ADP Crystals’ Thermal Stability for Noncritical Phase‐Matching Fourth Harmonic Generation Application

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