&lt;title&gt;Diffractive optics development for application on high-power solid state lasers&lt;/title&gt;

Bett, Thomas H.; Stevenson, R. M.; Taghizadeh, Mohammad R.; Miller, J. M.; Lightbody, Malcolm T. M.; Blair, P.; Layet, Ben; Watson, Norman F.; Barton, Ian M.; Robb, Graeme R.; McMonagle, J.B.

doi:10.1117/12.228248

Cited by 5 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In laser welding, laser-simulated etching, laser scanning and branding, semiconductor processing, and laser micro fabrication, the flat-top beam has significant advantages than the Gaussian beam [1][2][3]. Usually, diffractive optical element (DOE) is used to transfer the original Gaussian beam into the uniform flat-top beam due to its light weight, small volume and easy shaping design methods [4,5]. The G-S algorithm is used widely to optimize phase distribution of the DOE because the method is simple and efficient [6].…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Flat-Top Beam Produced by Diffractive Optical Element

Nie

Liu

et al. 2015

AMM

View full text Add to dashboard Cite

The modified Gerchberg-Saxton (G-S) methods of diffractive optical elements are presented for converting a Gaussian beam into a flat-top beam. The sample points of the input and output planes are discussed based on the sampling principle. The relationship between weighting factor, empirical constant, diffractive efficiency, and intensity uniformity is investigated. The simulation results of different modified methods are calculated when the incident beams are the same. The results show that the intensity uniformity of the output flat-top beam is the best when using the ST modified method.

show abstract

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Flat-Top Beam Produced by Diffractive Optical Element

Nie

Liu

et al. 2015

AMM

View full text Add to dashboard Cite

show abstract

“…The main functions of final optics assembly of ICF driver include [1,2,3,4] : (1) Converting first harmonic wave (1ω) that is amplified by fore system, by frequency converter, to third harmonic wave (3ω) that will enter the target; (2) Transmitting third harmonic wave to the target, while directing the unconverted first and second harmonic waves (2ω) away from the main light path; (3) Sending a fraction of the transmitted third harmonic wave as a sample beam into a calorimeter for energy and quality diagnostics; (4) Focusing the main laser beam and controlling the form of the focal spot to generate a smoothed spot at the target plane. In a word, the final optics assembly should accomplish the functions of frequency conversion, harmonic wave separation, beam sampling, beam smoothing and focusing, etc.…”

Section: Introductionmentioning

confidence: 99%

Study on the fabrication of combined BSG-CSG element

et al. 2005

View full text Add to dashboard Cite

In the final optics assembly of ICF driver, Diffractive Optical Elements (DOEs) are applied to achieve some important functions. Due to the advantage of easy integration, DOEs that achieve different functions can be combined into one element, and thus the system structure and performance of ICF driver can be optimized. In this paper, we present a new means to fabricate color separation grating (CSG) and beam sampling grating (BSG) on two surfaces of one fused-silica substrate with two-surface exposure method. The mask for CSG can be fabricated with common optical method since the period of CSG is large; whereas the mask for BSG cannot be made with normal micro-fabrication system whose resolution cannot meet the requirement of fabrication precision of slowly changed BSG fringes (from 2µm to 4µm). Therefore, we use e-beam direct writing method to fabricate mask for BSG. The alignment of CSG and BSG is designed in accordance with the requirement of actual system. Thus the functions of harmonic wave separation and beam sampling are realized through one silica plate. The satisfying experimental results are illustrated.

show abstract