Optical look-ahead-mode conversion from modified signed digit to 2's complement representation

Feng Qian; Guoqiang Li; Hao Ruan; Liren Liu

doi:10.1117/12.364004

1 October 1999 Optical look-ahead-mode conversion from modified signed digit to 2's complement representation

Feng Qian, Guoqiang Li, Hao Ruan, Liren Liu

Proceedings Volume 3805, Photonic Devices and Algorithms for Computing; (1999) https://doi.org/10.1117/12.364004
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

The modified signed-digit (MSD) number system offers parallel arithmetic operations because of its redundancy property. For exploiting the high parallelism of the MSD representation, MSD form and 2's complement binary form have to be converted to and from each other. In this paper, an efficient lookahead-mode conversion algorithm is introduced. The operation can be performed in parallel by binary logic and is thus suitable for optical implementation. The optical system utilizing a single electronic trapping device is suggested to realize the required operations. By programming the illumination of data arrays, any complex logic operations of multiple variables can be performed easily. The main hardware can be stacked to construct a compact optoelectronic processor of versatile functions. A proof-of- the-principle experiment is demonstrated.

Citation Download Citation

Feng Qian, Guoqiang Li, Hao Ruan, and Liren Liu "Optical look-ahead-mode conversion from modified signed digit to 2's complement representation", Proc. SPIE 3805, Photonic Devices and Algorithms for Computing, (1 October 1999); https://doi.org/10.1117/12.364004

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