Fabrication of micro holographic optical elements by interference of a single pulse from femtosecond laser

Author

Hirano, M. ; Kawamura, K. ; Sarukura, N. ; Hosono, H.

Author_Institution

Hosono Transparent Electro-Active Mater. Project, Japan Sci. & Technol. Corp., Kawasaki, Japan

fYear

2001

fDate

11-11 May 2001

Firstpage

125

Lastpage

126

Abstract

Summary form only given. By fully utilizing the unique features of femtosecond pulses from a mode locked Ti:sapphire laser such as short pulse duration, high energy density and good coherency, we have encoded micro-holographic optical elements (HOEs) either on or beneath material surfaces. The materials investigated include transparent dielectrics such as single crystals of Al/sub 2/O/sub 3/, SiC, LiNbO/sub 3/, ZrO/sub 2/, ZnO, CaF/sub 2/, CdF/sub 2/, MgO, and TiO/sub 2/, glasses, plastics and metals. Both surface relief type gratings and embedded gratings (refractive index modulation type) were fabricated, respectively, due to laser ablation at surfaces and laser induced structural alterations of materials such as the crystalline to amorphous phase change and chemical bond angle changes in silica glass.

Keywords

holographic gratings; holographic optical elements; laser materials processing; laser mode locking; light interference; optical fabrication; refractive index; Al/sub 2/O/sub 3/:Si; CaF/sub 2/; CdF/sub 2/; LiNbO/sub 3/; MgO; SiC; TiO/sub 2/; ZnO; ZrO/sub 2/; chemical bond angle change; crystalline to amorphous phase change; embedded gratings; femtosecond laser pulse interference; glasses; laser ablation; laser induced structural alterations; metals; micro holographic optical elements fabrication; micro-HOE encoding; mode locked Ti:sapphire laser; plastics; refractive index modulation type; surface relief type gratings; transparent dielectrics; Chemical lasers; Crystalline materials; Holographic optical components; Holography; Interference; Optical device fabrication; Optical materials; Optical refraction; Surface emitting lasers; Ultrafast optics;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on

Conference_Location

Baltimore, MD, USA

Print_ISBN

1-55752-662-1

Type

conf

DOI

10.1109/CLEO.2001.947581

Filename

947581