Beam steering by combining two binary-phase-modulated FLC SLMs

David Engstrom; Sverker Hard; Per Rudquist; Koen D'have; Tomasz Matuszczyk; Marek Skeren; Bjorn Lofving

doi:10.1117/12.502379

10 November 2003 Beam steering by combing two binary-phase-modulated FLC SLMs

David Engstrom, Sverker Hard, Per Rudquist, Koen D'have, Tomasz Matuszczyk, Marek Skeren, Bjorn Lofving

Proceedings Volume 5181, Wave Optics and Photonic Devices for Optical Information Processing II; (2003) https://doi.org/10.1117/12.502379
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Ferroelectric Liquid Crystal (FLC) Spatial Light Modulators (SLMs) are attractive because of their high switching speed. However, conventional FLC SLMs are only capable of binary phase modulation. This is inconvenient for beam steering since as much as 60% of the incident power is lost to unwanted diffraction orders. To overcome this problem two cascaded FLC SLMs were used in this work. By coherently imaging a 180° binary-phase FLC SLM onto a 90° FLC SLM, with high precision, an effective four-level phase modulator was realized experimentally. Beam steering was demonstrated in the angular range ±10.9 mrad. The angular inaccuracy of the steered beam was found to be about 0.1 mrad, which equals about 25% of the beam diameter. The beam steering device has also been used for tracking experiments.

Citation Download Citation

David Engstrom, Sverker Hard, Per Rudquist, Koen D'have, Tomasz Matuszczyk, Marek Skeren, and Bjorn Lofving "Beam steering by combing two binary-phase-modulated FLC SLMs", Proc. SPIE 5181, Wave Optics and Photonic Devices for Optical Information Processing II, (10 November 2003); https://doi.org/10.1117/12.502379

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