Recent results for the Raytheon RELI program

Filgas, David M.; Clatterbuck, T. O.; Cashen, M.; Daniele, A.; Hughes, S.; Mordaunt, D. W.

doi:10.1117/12.921055

Cited by 18 publications

(12 citation statements)

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“…These attributes have made this ion very attractive for power scaling in the glass fiber [7], [17], thin-disk [48], and PW [37] architectures, in addition to enabling ultra-short pulse generation in the 1 μm wavelength regime.…”

Section: B Ytterbium-quasi-four-level Laser Thresholdmentioning

confidence: 98%

“…Alternatively to reach very high power levels, i.e., >10 kWclass, master oscillator power amplifier (MOPA) configurations have been demonstrated with Yb-doped PW structures [37], circumventing the often stringent demands on the resonator design [27], [38] to obtain high beam quality. These high power systems show the ultimate benefit of this architecture for capitalizing on the excellent thermal management, high thermal conductivities of crystals, and high overall gain, made possible by the high aspect ratio PW structure.…”

Section: Introductionmentioning

confidence: 99%

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Crystal Planar Waveguides, a Power Scaling Architecture for Low-Gain Transitions

Mackenzie

Szela

Beecher

et al. 2015

IEEE J. Select. Topics Quantum Electron.

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In this paper, we present the underlying advantages that make the crystalline planar waveguide (PW) the key ingredient in power-scaling difficult or "weak" laser transitions, especially those which are extremely challenging to operate in other gain medium configurations. The planar waveguide architecture is shown to enable efficient laser operation of low-gain and/or quasi-four-level transitions that suffer reabsorption losses. Exemplar configurations are reported to make this case, for example, 1.4 W at 1.8 μm from a Nd:YAG double-clad planar waveguide laser (PWL), in addition to 0.5 W at 2.7 μm from a similar highly doped Er:YAG PWL. New laser performance levels from sesquioxide PWs fabricated by pulsed laser deposition are also presented for the first time, with >1 W obtained from a Yb:Y 2 O 3 PWL. Current performance and future prospects are discussed for this laser architecture.

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Section: B Ytterbium-quasi-four-level Laser Thresholdmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Crystal Planar Waveguides, a Power Scaling Architecture for Low-Gain Transitions

Mackenzie

Szela

Beecher

et al. 2015

IEEE J. Select. Topics Quantum Electron.

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show abstract

“…Their main deficiencies, resulting from a quasi-three-level scheme, can be overcome via cryogenic operation [4,5,8,10] or by applying special architectures such as thin disks [6,13,16], slabs [7][8][9][10][11] or fibers [12]. Excluding a few cases [9,10], the end-pumping scheme has dominated high-power Yb laser systems because of the specific requirements of quasi-III-level media and the relative simplicity and compactness of beam-shaping optics currently available for high-power laser diode stacks. Our particular aim in this work is to show the feasibility of the side-pumped scheme for Yb oscillators operating at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Diode-side-pumped, passively Q-switched Yb:LuAG laser

Kaskow

Gałecki

Jabczyński

et al. 2015

Optics & Laser Technology

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“…Yb-based planar-waveguide amplifiers have high gain and are known for their excellent thermal properties due to their large surface area suitable for multiple-pass amplification. Indeed, planar-waveguide technology has already been show to be power-scalable up to 16 kW [1]. The planar-waveguide configuration presented here has already been used as an oscillator generating 400 W with a slope efficiency of 78% [2].…”

Section: Introductionmentioning

confidence: 99%