Phase Control Of Coherent Diode Laser Arrays Using Liquid Crystals

Bill Cassarly; J. Michael FinIan; Michael DeJule; Charles Stein

doi:10.1117/12.976364

22 June 1989 Phase Control Of Coherent Diode Laser Arrays Using Liquid Crystals

Bill Cassarly, J. Michael FinIan, Michael DeJule, Charles Stein

Proceedings Volume 1043, Laser Diode Technology and Applications; (1989) https://doi.org/10.1117/12.976364
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

The on-axis fields from separate elements of a coherent laser array can interfere either constructively or destructively, depending upon the relative phases. We describe thin film transistor (TFT) and direct-drive controlled arrays of liquid crystal phase shifters, which provide both phase matching and fine beamsteering. The transmissive liquid crystal devices contain homogeneously aligned layers of nematic liquid crystals sandwiched between two glass plates. The devices impart electrically controllable analog phase delays to laser beams passing through the cells. The devices are divided into arrays of individually controlled elements using separate transparent electrodes.

Citation Download Citation

Bill Cassarly, J. Michael FinIan, Michael DeJule, and Charles Stein "Phase Control Of Coherent Diode Laser Arrays Using Liquid Crystals", Proc. SPIE 1043, Laser Diode Technology and Applications, (22 June 1989); https://doi.org/10.1117/12.976364

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