10[sup]13[/sup]W/cm[sup]2[/sup] Focusability of a High Average Power Glass Laser

Tadashi Kanabe; Takahisa Jitsuno; Masahiro Nakatsuka; Chiyoe Yamanaka; Sadao Nakai

doi:10.1117/12.951189

6 July 1989 10¹³W/cm² Focusability of a High Average Power Glass Laser

Tadashi Kanabe, Takahisa Jitsuno, Masahiro Nakatsuka, Chiyoe Yamanaka, Sadao Nakai

Proceedings Volume 1040, High Power and Solid State Lasers II; (1989) https://doi.org/10.1117/12.951189
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

HIgh Repetition and high EXcitation Solid state laser (HIREXS) of Zigzag optical pass slab geometry has been designed and developed for an application to the soft X-ray generation such as X-ray lithography. Design and performances of a zigzag optical path laser with a 230x65x5mm Nd:glass slab are described. The single pulse output energy of 98.9J was obtained at slope efficiency of 2.9% at 1.05μm wavelength. The laser beam divergences measured in the directions of width and thickness of the laser glass were about lmrad and 2mrad, respectively, without the transverse mode control. The maximum laser stored energy of 26J with the stored efficiency of 0.65% at 4kJ pumping was obtained. Q-switch operation of this laser resulted in 20J output at a pulse with of 28ns which results in the laser extraction efficency of 77%. The focused intensity was achieved 7x10¹²W/cm². A water-cooled laser slab of silicate glass LSG-91H of the same dimensions generates an output power of 45W at a repetition rate of 3Hz.

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Tadashi Kanabe, Takahisa Jitsuno, Masahiro Nakatsuka, Chiyoe Yamanaka, and Sadao Nakai "10¹³W/cm² Focusability of a High Average Power Glass Laser", Proc. SPIE 1040, High Power and Solid State Lasers II, (6 July 1989); https://doi.org/10.1117/12.951189

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KEYWORDS

Glasses

Laser energy

Pulsed laser operation

Solid state lasers

Energy efficiency

Laser glasses

High power lasers

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