Near-diffraction-limited excimer laser beam from a XeCl POPA system

Sarah Bollanti; Paolo Di Lazzaro; Francesco Flora; Gualtiero Giordano; Tommaso Letardi; Daniele Murra; C. Petrucci; Giovanni Schina; Olivier P. Uteza; Cheng En Zheng

doi:10.1117/12.248600

26 August 1996 Near-diffraction-limited excimer laser beam from a XeCl POPA system

Sarah Bollanti, Paolo Di Lazzaro, Francesco Flora, Gualtiero Giordano, Tommaso Letardi, Daniele Murra, C. Petrucci, Giovanni Schina, Olivier P. Uteza, Cheng En Zheng

Author Affiliations +

Proceedings Volume 2788, High-Power Lasers: Gas and Solid State Lasers; (1996) https://doi.org/10.1117/12.248600
Event: Lasers, Optics, and Vision for Productivity in Manufacturing I, 1996, Besancon, France

Abstract

We present the results of a compact three-electrode XeCl laser operated in a power oscillator-power amplifier (POPA) configuration with transverse mode selection. The smaller of two laser heads is an oscillator, equipped with a generalized self-filtering unstable resonator (GSFUR). The oscillator output beam has an energy of 9 mJ in a 75 ns FWHM pulse and is only 1.1 times over its diffraction limit. The single-pass amplified beam has an output energy of 90 mJ in a pulse 85 ns long and, with a times diffraction limit (TDL) equal to 1.6, reaches a brightness of 3 (DOT) 10¹⁴ Wcm^-2ster^-1. Operating the laser at low repetition rate (1 Hz), the beam pointing stability (BPS) of both oscillator and amplifier output beams has been measured. The angular fluctuations of the focused beams are each within 1/6 of their own total beam divergence.

Citation Download Citation

Sarah Bollanti, Paolo Di Lazzaro, Francesco Flora, Gualtiero Giordano, Tommaso Letardi, Daniele Murra, C. Petrucci, Giovanni Schina, Olivier P. Uteza, and Cheng En Zheng "Near-diffraction-limited excimer laser beam from a XeCl POPA system", Proc. SPIE 2788, High-Power Lasers: Gas and Solid State Lasers, (26 August 1996); https://doi.org/10.1117/12.248600

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