All-optical Read Only Memory Employing SOAs

Jung, Young Jin; Park, Namkyoo; Jhon, Young Min; Lee, Seok

doi:10.3807/josk.2008.12.1.052

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…The functions of the 2-to-4 line decoder, which are commonly used in digital electronics, are summarized in [10,12], and all-optical implementations are shown in Fig. 1.…”

Section: All-optical Read-only-memory With Decodermentioning

confidence: 99%

“…If we let the input be a binary number where I 1 is the most-significant bit (MSB) and I 0 is the least-significant bit (LSB), then only the output port number that corresponds to the binary number indicates level 1, whereas the others indicate level 0. An experimental demonstration of an all-optical decoder was carried out in [10]. In practice, interference must be avoided when the two signals are summed by controlling the polarization of the two signals to ensure that they have different states of polarization.…”

Section: All-optical Read-only-memory With Decodermentioning

confidence: 99%

“…(2)-(5) are shown in Table 2 with the parameter names. Taking SOAs of length L ¼ 300 μm and driving current I ¼ 300 mA, the XGM processes were optimized by adjusting the pump and probe power levels using static simulation [10]. The return-to-zero (RZ) signal was used in our implementation because the XGM process for the RZ signal is generally faster than the nonreturnto-zero (NRZ) signal according to [7].…”

Section: All-optical Read-only-memory With Decodermentioning

confidence: 99%

“…Overcoming these difficulties in our previous work, we constructed all-optical ROM in which four characters were stored in the American Standard Code for Information Interchange (ASCII) format using an all-optical 2-to-4 line decoder. Experimental results showed that decoder operations are possible with XGM in semiconductor optical amplifiers (SOAs), and a numerical study was carried out for the operation of a ROM having 2 bit addresses [10]. We also developed a one-level simplification method for the design of all-optical combinational logic circuits to make more complex circuits [11].…”

Section: Introductionmentioning

confidence: 99%

“…Here we present the design details of all-optical ROM with a one-level simplification method and show that the method is more appropriate for more complex ROM systems. An all-optical ROM-employing decoder is presented that provides more concrete schemes compared with that in our previous publication [10]. We also present an all-optical ROM having 3 bit addresses that was constructed by use of a one-level simplification method and describe the advantages of the method.…”

Section: Introductionmentioning

confidence: 99%

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Design of all-optical read-only memory

et al. 2009

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Galois field (GF) algebraic expressions have been found to be promising choices for reversible and quantum implementation of multivalued logic. For the first time to our knowledge, we developed GF(4) adder multivalued (four valued) logic circuits in an all-optical domain. The principle and possibilities of an all-optical GF(4) adder circuit are described. The theoretical model is presented and verified through numerical simulation. The quaternary inverter, successor, clockwise cycle, and counterclockwise cycle gates are proposed with the help of the all-optical GF(4) adder circuit. In this scheme different quaternary logical states are represented by different polarized light. A terahertz optical asymmetric demultiplexer interferometric switch plays an important role in this scheme.

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“…The functions of the 2-to-4 line decoder, which are commonly used in digital electronics, are summarized in [10,12], and all-optical implementations are shown in Fig. 1.…”

Section: All-optical Read-only-memory With Decodermentioning

confidence: 99%

Section: All-optical Read-only-memory With Decodermentioning

confidence: 99%

Section: All-optical Read-only-memory With Decodermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design of all-optical read-only memory

et al. 2009

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Simulative analysis of all-optical reflective semiconductor optical amplifier based 2-to-4 line decoder and read only memory (ROM)

Maji

Mukherjee

Mandal

2022

Journal of Optical Communications

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In this paper, all-optical 2-to-4 line decoder and read-only memory (ROM) are analyzed using a Reflective Semiconductor Optical Amplifier (RSOA) based optical switch. The structures of these 2-to-4 line decoder and read only memory are very simple and the operating speed is 200 Gbps, which can be used in optical hardware systems. The 2-to-4 line decoder output shows a very high extension ratio (ER), contrast ratio (CR), and Q value. These high values indicate the distinguishment between two states (‘1’ and ‘0’) very clearly.

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Properties of Surface Modes Used for Directional Emission from Photonic Crystal Waveguides

Chung

2008

Journal of the Optical Society of Korea

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Directional emission of light exiting a photonic crystal waveguide by a coherent action of radiative surface modes was recently demonstrated, and subsequently the substantial enhancement of the directional emission was achieved by engineering the surface and adjusting relevant parameters. Here we present the analysis of surface modes causing the enhanced emission by the plane wave expansion method and the finite-difference time-domain method. In particular, surface band structures are calculated for nonradiative and radiative surface modes, respectively, and intensity profiles of some representative modes for nonradiative and radiative cases are given.

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All-optical Read Only Memory Employing SOAs

Cited by 6 publications

References 9 publications

Design of all-optical read-only memory

Design of all-optical read-only memory

Simulative analysis of all-optical reflective semiconductor optical amplifier based 2-to-4 line decoder and read only memory (ROM)

Properties of Surface Modes Used for Directional Emission from Photonic Crystal Waveguides

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