Spatial profile distortion of harmonically-converted partially-coherent light

Incoherent light techniques (ISI and PCL) have been proposed to achieve the high degree of spatial beam uniformity required in the foot pulse of a laser fusion driver. Although these techniques provide outstanding beam smoothing performance in KrF lasers, their use in glass lasers appears to be limi...

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Bibliographic Details
Published inOptics communications Vol. 130; no. 1; pp. 51 - 56
Main Author Lehmberg, R.H.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 15.09.1996
IEEE
Elsevier Science
Subjects
Beam characteristics: profile, intensity, and power; spatial pattern formation
Exact sciences and technology
Fiber lasers
Foot
Fundamental areas of phenomenology (including applications)
Glass
Harmonic distortion
Image converters
Laser beams
Laser noise
Laser optical systems: design and operation
Optical pulses
Optics
Physics
Smoothing methods
Speckle
Beam profiles
Spatial distribution
Simulation
Solid state lasers
Incoherent radiation
Glass
Theoretical study
Distortion
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Summary:Incoherent light techniques (ISI and PCL) have been proposed to achieve the high degree of spatial beam uniformity required in the foot pulse of a laser fusion driver. Although these techniques provide outstanding beam smoothing performance in KrF lasers, their use in glass lasers appears to be limited by nonlinear optical effects. The simulations presented in this paper show that the harmonic conversion process can introduce distortion of the time-averaged focal profile, and this distortion is exacerbated by even the modest amount of self phase modulation likely to be generated in the low intensity foot pulse.
ISBN:9781557524430
1557524432
ISSN:0030-4018
1873-0310
DOI:10.1016/0030-4018(96)00244-1