All-optical or gate using cross gain modulation in semiconductor optical amplifier

Young Tae Byun, Kyoung Sun Choi, Young Min Jhon, Deok Ha Woo, Seok Lee, Sun Ho Kim, Jinwoo Park

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)


In the near future, information processing capacity will increase up to several Tbit/s to satisfy various applications such as voice signals, vivid images, and motion pictures, etc. To transmit large-capacity information at high speed, all-optical signal processing is highly recommended. Recently, several all-optical OR logic gates were reported by using an ultrafast nonlinear interferometer (UNI), a Michelson interferometer (MI) [1], and a cross gain modulation (XGM) technique in the cascaded semiconductor optical amplifiers (SOAs) [2]. However, the reported speed of logic OR with the cascaded SOAs was limited by 2.5 Gbit/s because of relatively slow recovery time. In this paper, an all-optical OR logic gate has been for the first time proposed at 10 Gbit/s by using the XGM of single SOA. Figure 1 shows an experimental setup for the all-optical OR logic gate. The charateristics of all-optical logic OR are simulated by use of a commercially available VPI simulator. Fist of all, signal A as probe signal with 1100 pattern and signal B as pump signal with 0110 pattern are simultaneously passed through the SOA at 10 Gbit/s. Then, output signal is Boolean AB̄. Finally, signal B is divided by a 50:50 coupler and recombined by another coupler to generate Boolean AB̄ + B with 1110 pattern, which coincides with a truth table of OR logic gate. Figure 2 shows input and output signals for all-optical logic OR. In other words, probe signal A with 1100 pattern, pump signal B with 0110 pattern, Boolean AB̄, and output signal AB̄ + B with 1110 pattern are shown. In conclusion, all-optical OR logic operation is obtained at 10 Gbit/s by using single SOA.

Original languageEnglish
Title of host publication2005 Conference on Lasers and Electro-Optics Europe
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages1
ISBN (Print)0780389743, 9780780389748
Publication statusPublished - 2005
Event2005 Conference on Lasers and Elctro-Optics Europe - Munich, Germany
Duration: 2005 Jun 122005 Jun 17

Publication series

NameConference on Lasers and Electro-Optics Europe - Technical Digest


Other2005 Conference on Lasers and Elctro-Optics Europe

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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