Pump uniformity and temperature profile measurements in a planar waveguide Nd: YAG laser by a beam deflection method

Fei Sun; Howard J. Baker; Adam B. Russell; Jesus D. Valera; Denis R. Hall

doi:10.1109/JQE.2007.899501

Pump uniformity and temperature profile measurements in a planar waveguide Nd: YAG laser by a beam deflection method

Fei Sun, Howard J. Baker, Adam B. Russell, Jesus D. Valera, Denis R. Hall

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

A planar waveguide laser using a large-core Nd:YAG waveguide and face-pumping by diode bars has produced a multimode power up to 160 W, with direct-contact water-cooling across the largest faces of the waveguide in the lateral direction. A method is reported that measures the nonuniform heat dissipation in the waveguide core and nonuniform water-cooling through deflection of a helium-neon laser beam passing through the waveguide claddings. Temperature gradients resulting from the varying heat transfer coefficient to the coolant are quantified, together with lateral thermal lens effects associated with edge-cooling and nonuniform pumping. The heat flux in the claddings is compared for two different waveguide structures, giving information on multipass face-pumping efficiency and uniformity. © 2007 IEEE.

Original language	English
Pages (from-to)	669-675
Number of pages	7
Journal	IEEE Journal of Quantum Electronics
Volume	43
Issue number	8
DOIs	https://doi.org/10.1109/JQE.2007.899501
Publication status	Published - Aug 2007

Keywords

Beam deflection
Cooling uniformity
Planar waveguide laser
Pump uniformity

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10.1109/JQE.2007.899501

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title = "Pump uniformity and temperature profile measurements in a planar waveguide Nd: YAG laser by a beam deflection method",

abstract = "A planar waveguide laser using a large-core Nd:YAG waveguide and face-pumping by diode bars has produced a multimode power up to 160 W, with direct-contact water-cooling across the largest faces of the waveguide in the lateral direction. A method is reported that measures the nonuniform heat dissipation in the waveguide core and nonuniform water-cooling through deflection of a helium-neon laser beam passing through the waveguide claddings. Temperature gradients resulting from the varying heat transfer coefficient to the coolant are quantified, together with lateral thermal lens effects associated with edge-cooling and nonuniform pumping. The heat flux in the claddings is compared for two different waveguide structures, giving information on multipass face-pumping efficiency and uniformity. {\textcopyright} 2007 IEEE.",

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author = "Fei Sun and Baker, {Howard J.} and Russell, {Adam B.} and Valera, {Jesus D.} and Hall, {Denis R.}",

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T2 - YAG laser by a beam deflection method

AU - Sun, Fei

AU - Baker, Howard J.

AU - Russell, Adam B.

AU - Valera, Jesus D.

AU - Hall, Denis R.

PY - 2007/8

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AB - A planar waveguide laser using a large-core Nd:YAG waveguide and face-pumping by diode bars has produced a multimode power up to 160 W, with direct-contact water-cooling across the largest faces of the waveguide in the lateral direction. A method is reported that measures the nonuniform heat dissipation in the waveguide core and nonuniform water-cooling through deflection of a helium-neon laser beam passing through the waveguide claddings. Temperature gradients resulting from the varying heat transfer coefficient to the coolant are quantified, together with lateral thermal lens effects associated with edge-cooling and nonuniform pumping. The heat flux in the claddings is compared for two different waveguide structures, giving information on multipass face-pumping efficiency and uniformity. © 2007 IEEE.

KW - Beam deflection

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KW - Planar waveguide laser

KW - Pump uniformity

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JO - IEEE Journal of Quantum Electronics

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Pump uniformity and temperature profile measurements in a planar waveguide Nd: YAG laser by a beam deflection method

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Keywords

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