Recent advances on multiple channel unequally spaced optical phased array for ultrafast LADAR

Stuart S. Yin; Jae Hun Kim; Jimmy Yao; Paul Ruffin; Eugene Edwards; Christina Brantley; Claire Luo

doi:10.1117/12.794036

27 August 2008 Recent advances on multiple channel unequally spaced optical phased array for ultrafast LADAR

Stuart S. Yin, Jae Hun Kim, Jimmy Yao, Paul Ruffin, Eugene Edwards, Christina Brantley, Claire Luo

Proceedings Volume 7056, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II; 705619 (2008) https://doi.org/10.1117/12.794036
Event: Photonic Devices + Applications, 2008, San Diego, California, United States

Abstract

In this paper, we experimentally verify that previously proposed idea of unequally spaced optical phased array can greatly reduce grating-lobes. As the verification purpose of our previous numerical design, a laser beam is passed through unequally-spaced slits, whose spacings are the same as the previous design. Interference patterns formed after both 4- and 8-channel slits clearly show that the grating-lobes can be greatly minimized. To realize the beam steering possible, optical waveguides array, which has unequally spaced design at the output ends is fabricated. The phase of each beam can be varied using fibers array wound around PZT tubes before each beam is coupled into the waveguides array. Interference patterns formed after the outputs of both 4- and 8-channel waveguides array show that the gratinglobes can be greatly reduced using unequally spaced optical phased array technique.

Citation Download Citation

Stuart S. Yin, Jae Hun Kim, Jimmy Yao, Paul Ruffin, Eugene Edwards, Christina Brantley, and Claire Luo "Recent advances on multiple channel unequally spaced optical phased array for ultrafast LADAR", Proc. SPIE 7056, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II, 705619 (27 August 2008); https://doi.org/10.1117/12.794036

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