Beam intensity reshaping by pump modification in a laser amplifier

Igor A. Litvin; Oliver John Philip Collett; Gary King; Hencharl J. Strauss

doi:10.1364/OE.23.030165

Beam intensity reshaping by pump modification in a laser amplifier

Igor A. Litvin, Oliver John Philip Collett, Gary King, Hencharl J. Strauss

School of Engineering & Physical Sciences

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

5 Citations (Scopus)

Abstract

We propose a new technique for laser beam shaping into adesirable beam profile by using a laser amplifier with a pump beam that has a modified intensity profile. We developed the analytical formula, which describes the transformation of the seed beam into the desired beam profile in a four level amplifiers small signal regime. We propose a numerically method to obtain the required pump intensity profile in the case where high pump power saturated the laser crystal or for three level materials. The theory was experimentally verified by one dimensionally shaping a Gaussian shaped seed into a Flat-Top beam in a Ho:YLF amplifier pumped by a Tm:YLF laser with a HG01 intensity profile.

Original language	English
Pages (from-to)	30165-30176
Number of pages	12
Journal	Optics Express
Volume	23
Issue number	23
DOIs	https://doi.org/10.1364/OE.23.030165
Publication status	Published - 16 Nov 2015

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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abstract = "We propose a new technique for laser beam shaping into adesirable beam profile by using a laser amplifier with a pump beam that has a modified intensity profile. We developed the analytical formula, which describes the transformation of the seed beam into the desired beam profile in a four level amplifiers small signal regime. We propose a numerically method to obtain the required pump intensity profile in the case where high pump power saturated the laser crystal or for three level materials. The theory was experimentally verified by one dimensionally shaping a Gaussian shaped seed into a Flat-Top beam in a Ho:YLF amplifier pumped by a Tm:YLF laser with a HG01 intensity profile.",

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AU - Collett, Oliver John Philip

AU - King, Gary

AU - Strauss, Hencharl J.

PY - 2015/11/16

Y1 - 2015/11/16

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AB - We propose a new technique for laser beam shaping into adesirable beam profile by using a laser amplifier with a pump beam that has a modified intensity profile. We developed the analytical formula, which describes the transformation of the seed beam into the desired beam profile in a four level amplifiers small signal regime. We propose a numerically method to obtain the required pump intensity profile in the case where high pump power saturated the laser crystal or for three level materials. The theory was experimentally verified by one dimensionally shaping a Gaussian shaped seed into a Flat-Top beam in a Ho:YLF amplifier pumped by a Tm:YLF laser with a HG01 intensity profile.

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Beam intensity reshaping by pump modification in a laser amplifier

Abstract

ASJC Scopus subject areas

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