Title

Laser Beam Shaping By Holographic Optical Elements

Abstract

For material processing and laser machining, it is important to shape intensity and phase profiles of the laser beams. For dynamic beam shaping, we suggest the method based on energy exchange during self-diffraction of laser beams in the photorefractive materials. For applications, related to use of the powerful lasers we have tested a possibility of beam shaping by holographic optical elements, recorded in Photo-Thermo-Refractive (PTR) glasses, developed in CREOL. The gratings in PTR glasses are stable up to 400°C with laser-induced breakdown energy threshold of 10 J/cm 2 in 1 ns pulses at 1064 nm. High diffraction efficiency more than 95% of gratings recorded in PTR glass allows to achieving high energy transfer that is vital for commercial laser applications. Preliminary results show that flattop distribution of laser intensity may be realized in the diffraction orders.

Publication Date

12-1-2003

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

5257

Number of Pages

152-162

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

1842528117 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/1842528117

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