Beam transforming phase masks in PTR glass by using digital micromirror device (Conference Presentation)

Duc-Quy Nguyen; Zachary J. Labossiere; Fedor Kompan; Ivan Divliansky; David Guacaneme; Leonid B. Glebov

doi:10.1117/12.2290648

14 March 2018 Beam transforming phase masks in PTR glass by using digital micromirror device (Conference Presentation)

Duc-Quy Nguyen, Zachary J. Labossiere, Fedor Kompan, Ivan Divliansky, David Guacaneme, Leonid B. Glebov

Proceedings Volume 10513, Components and Packaging for Laser Systems IV; 1051315 (2018) https://doi.org/10.1117/12.2290648
Event: SPIE LASE, 2018, San Francisco, California, United States

Abstract

Phase masks for mode conversion and other laser beam transformation are usually produced by surface profiling using spatially selective etching or deposition. Such fabrication techniques for making complex phase masks take significant time, effort, and expense. Surface damages and contaminations restrain the wide application of such phase elements as well. We propose an alternative, where volume phase masks were produced by spatially selective refractive index change in the bulk of plane-parallel plate of photo-thermo-refractive (PTR) glass. Those phase masks show high tolerance to harsh environments and high-power laser radiation. The approach uses a light amplitude modulating element called digital micromirror device (DMD) which has millions of micro-mirrors that tilt to ‘on’ or ‘off’ position based on the voltage applied to them. Selecting different time intervals for the mirrors to be ‘on’ or ‘off’, allows for grey level images to be generated and projected by the DMD device. Using a broadband UV light source, the desired amplitude image was projected onto a PTR glass plate for a designated period of time. The variable light amplitude exposure of the glass is converted to a refractive index change after thermal treatment step. The phase masks are recorded in the volume and are practically unsusceptible to surface damage, changes in the environment and other factors from which surface created phase masks suffer. The simplicity in fabricating grey level phase masks, the flexibility to computer design, and the robustness are the main advantages of the approach when compared to the standard phase mask fabricating techniques.

Conference Presentation

Citation Download Citation

Duc-Quy Nguyen, Zachary J. Labossiere, Fedor Kompan, Ivan Divliansky, David Guacaneme, and Leonid B. Glebov "Beam transforming phase masks in PTR glass by using digital micromirror device (Conference Presentation)", Proc. SPIE 10513, Components and Packaging for Laser Systems IV, 1051315 (14 March 2018); https://doi.org/10.1117/12.2290648

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Glasses

Digital micromirror devices

Fabrication

High power lasers

Micromirrors

Mirrors

Refractive index

Show All Keywords

Keywords/Phrases

Search In:

Publication Years