All-optical 4-bit Gray code to binary coded decimal converter

Young Jin Jung; Seok Lee; Namkyoo Park

doi:10.1117/12.762429

5 February 2008 All-optical 4-bit Gray code to binary coded decimal converter

Young Jin Jung, Seok Lee, Namkyoo Park

Proceedings Volume 6890, Optical Components and Materials V; 68900S (2008) https://doi.org/10.1117/12.762429
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

All-optical 4-bit Gray code to binary coded decimal (BCD) converter was demonstrated, for the first time in our knowledge, with the number of 12 SOAs by means of commercially available numerical analysis tool (VPI). Circuit design approach was modified appropriately in order to fit the electrical method on an all-optical logic circuit based on cross gain modulation (XGM) process so that signal degradation due to the non-ideal optical logic gates can be minimized. In our approach, only using XGM process as a nonlinear function, the maximum number of XGM process serially underwent by input signals is twice at the most insuring signal quality. Without regenerations, Q-factor of around 4 was obtained for the most severely degraded output bit (least significant bit - LSB) with 2.5Gbps clean input signals having 20dB extinction ratio. It is worth to note that, implementing this LSB is complex enough to give it as an example of a 4-bit conversion system. While modifying two-level simplification method and Karnaugh map method to design Gray code to BCD converter, general design concept was also founded in this research not only for the Gray code to BCD converter but also for any general applications such as encoder / decoder, multiplexer / demultiplexer, and read only memory so that readers can develop their own all-optical logic device easily using XGM process in SOAs.

Citation Download Citation

Young Jin Jung, Seok Lee, and Namkyoo Park "All-optical 4-bit Gray code to binary coded decimal converter", Proc. SPIE 6890, Optical Components and Materials V, 68900S (5 February 2008); https://doi.org/10.1117/12.762429

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