Mr. Philip M. Peters Profile

Philip M. Peters

at National Institute of Standards and Technology

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Proceedings Article | 26 November 1999 Paper

Active materials for integrated optic applications

Joseph Hayden, David Funk, David Veasey, Philip Peters, Norman Sanford

Proceedings Volume 3847, (1999) https://doi.org/10.1117/12.371253

KEYWORDS: Glasses, Absorption, Ions, Waveguides, Oxides, Integrated optics, Ion exchange, Laser glasses, Iron, Erbium

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The ability to engineer glass properties through the selection and adjustment of chemical composition continues to make glass a leading material in both active and passive applications. The development of optimal glass compositions for integrated optical applications requires a number of considerations that are often at variance with one another. Of critical importance is that the glass offers compatibility with standard ion exchange technologies, allowing fabrication of guided wave structures. In addition, for application as an active material, the resultant structures must be characterized by absence of inclusions and low absorption at the lasing wavelength, putting demands on both the selection and identity of the raw materials used to prepare the glass. We report on the development of an optimized glass composition for integrated optic applications that combines good laser properties with good chemical durability allowing for a wide range of chemical processing steps to be employed without substrate deterioration. In addition, care was taken during the development of this glass to insure that the selected composition was consistent with manufacturing technology for producing high optical quality glass. We present the properties of the resultant glasses, including results of detailed chemical and laser properties, for use in the design and modeling of active waveguides prepared with these glasses.

Proceedings Article | 26 November 1999 Paper

New rare-earth hosts: OH in laser glasses

Philip Peters, Susan Houde-Walter

Proceedings Volume 3847, (1999) https://doi.org/10.1117/12.371260

KEYWORDS: Glasses, Ions, Absorption, Laser glasses, Vitreous, Silica, Luminescence, Waveguide lasers, Energy transfer, Upconversion

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Furnace-melt, multi-component glasses are used to produce dense gain media for waveguide and micro-chip lasers. The compositional flexibility is often accompanied by elevated water contents, which can lead to hydroxyl (OH) quenching. OH quenching can significantly shorten excited state lifetimes, even at low pump powers. It therefore becomes important to know and control the OH content of laser glasses. While a simple relation between infrared vibration spectra and OH contents exists for vitreous silica, we show that this relation does not apply to multicomponent glasses. Instead, we present a self-consistent calculation to determine an order- of-magnitude estimate of the number of quenched rare-earth (RE) ions in multi-component glasses. Infra-red absorption spectra and fluorescence lifetimes are required. This method gives an accurate prediction of quench-shortened fluorescent lifetimes in a wide variety of host glasses.

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