Abstract
We demonstrate the use of high- and low-frequency subcarrier-multiplexed pilot tones as control signals to achieve both coarse and fine synchronization in a bit-parallel wavelength-division-multiplexed optical interconnection. These control signals are located on each of the two outer wavelengths and are combined with the baseband data before transmission. The phase difference of the tones enables: 1) fine synchronization to <1/8 of a bit time in the optical domain for all wavelength channels simultaneously by comparing the high-frequency tones and using a discrete set of wavelength-dependent delays and 2) coarse synchronization over several bit times in the electrical domain by comparing the low-frequency tones and using shift registers.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1057-1059 |
| Number of pages | 3 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 11 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 1999 |
| Externally published | Yes |
Bibliographical note
Funding Information:Manuscript received February 1, 1999; revised April 8, 1999. This work was suppported by the DARPA Optical Materials Center, by the NSF Presidential Faculty Fellows Award, by the NSF ERC in Integrated Media Systems, by a Packard Foundation Fellowship, and by the Powell Foundation. The authors are with the Department of Electrical Engineering, University of Southern California, Los Angeles, CA 90089-2565 USA. Publisher Item Identifier S 1041-1135(99)05910-8.