Optical shift register based on an optical flip-flop memory with a single active element

Zhang, S.; Li, Z.; Liu, Y.; Geldenhuys, R.; Ju, Heongkyu; Lenstra, D.; Khoe, G.D.; Dorren, J.S.

doi:10.1049/cp:20050458

Cited by 18 publications

(12 citation statements)

References 3 publications

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“…Optical shift registers have obtained significant consideration in communication systems since they could be used as a key component in serial-to-parallel converters, convolution encoders, optical time division multiplexing networks and optical packet buffers (Zhang et al 2005;Lee and Kim 1995;Chan et al 1998). They act as memory units and are imperative elements for optical computing and optical signal processing systems.…”

Section: Introductionmentioning

confidence: 99%

Design of universal shift register based on electro-optic effect of LiNbO3 in Mach–Zehnder interferometer for high speed communication

2015

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An optical universal shift register has been demonstrated based on the electrooptic effect of lithium niobate (LiNbO 3 ) in Mach-Zehnder interferometer (MZI), which can be used as a building block for optical computing and optical signal processing systems. The proposed device comprises of two serially connected optical D flip-flops and two multiplexers. Each optical D flip-flop consists out of three MZIs sharing a single clock pulse. The two cascaded multiplexers are controlled by the electric pulses in order to perform the bidirectional shifting and parallel loading operation of optical pulses. The pulse shifting behavior is analyzed using Beam propagation method and verified with the help of MATLAB simulations and function table.

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Section: Introductionmentioning

confidence: 99%

Design of universal shift register based on electro-optic effect of LiNbO3 in Mach–Zehnder interferometer for high speed communication

2015

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“…Two configurations for achieving fast, low−power bistable optical devices have been reported, a po− larization−bistable VCSEL [2] and a coupled micro−ring laser [3]. Optical shift registers have received considerable atten− tion and several approaches have been explored, including an optical shift register based on cascaded optical flip−flop me− mories driven by common optical clock pulses [4]. This con− cept has been realized using coupled self electro−optic effect devices (SEEDs) [5].…”

Section: Introductionmentioning

confidence: 99%

“…Attempts to realize multi−bit optical memory, such as 2−bit buffering and shift register operation, are reviewed in Sect. 4. Because this paper focuses on the introduction of polarization bistability in VCSELs and experimental demonstrations at 980 nm, expe− rimental results for 1.55 μm VCSELs are not given, they can be found in Ref.…”

Section: Introductionmentioning

confidence: 99%

Polarization-bistable vertical-cavity surface-emitting lasers: application for optical bit memory

Kawaguchi

2009

Opto-Electronics Review

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We summarize recent results on polarization-bistable vertical-cavity surface-emitting lasers (VCSELs) and their application to optical buffer memory. All-optical flip-flop operation with very low switching energies and high repetition rates is achieved. An optical buffer memory consisting of a two-dimensional array of polarization-bistable VCSELs, in which the bit state of the optical signal, “0” or “1”, is stored as a lasing linear polarization state of 0 or 90°. Input data stored as the polarization states of the first VCSEL are transferred to the polarization states of the second VCSEL. In our experiments with 980 nm polarization-bistable VCSELs, 10 Gbit/s optical buffering, 2-bit optical buffering, and a shift register function have been successfully demonstrated.

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“…Due to their great potential in optical computation, several all-optical digital devices have been proposed as building elements for more complex subsystems, including optical threshold function [1], logic gates [2][3][4][5], optical buffer [6], flip-flops [1,7] and shift register [8]. In particular, optical flip-flop has attracted special interest since it can work as a finite state machine in an optical computer.…”

Section: Introductionmentioning

confidence: 99%

All-Optical Clocked Flip-Flops Exploiting SOA-Based SR Latches and Logic Gates

Wang

Meloni

Berrettini

et al. 2009

Lecture Notes in Computer Science

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Abstract. All-optical flip-flops are key components of photonic digital processing in next generation optical network and computing. In most digital applications, signal synchronization with a reference clock is a basic feature. In this paper, an entire set of all-optical clocked flip-flops, including SR, D, T, and JK types is proposed and demonstrated, each employing a single SR latch and optical logic gates previously introduced in literature. The bi-stable element is based on gain quenching mechanism between SOAs of two coupled fiber ring lasers. Three logic gates are carried out by exploiting four wave mixing (FWM) and cross gain modulation (XGM) nonlinear effects in SOA. Different flip-flop functionalities are obtained by adding one of the logic gates, or a combination of them, to the latch scheme. Performance evaluation in terms of extinction ratio demonstrates the effectiveness of proposed schemes. Speed limitation of flip-flop operation is also investigated and photonic integration is identified as a feasible solution to increase the operation speed beyond GHz.

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Optical shift register based on an optical flip-flop memory with a single active element

Cited by 18 publications

References 3 publications

Design of universal shift register based on electro-optic effect of LiNbO3 in Mach–Zehnder interferometer for high speed communication

Design of universal shift register based on electro-optic effect of LiNbO3 in Mach–Zehnder interferometer for high speed communication

Polarization-bistable vertical-cavity surface-emitting lasers: application for optical bit memory

All-Optical Clocked Flip-Flops Exploiting SOA-Based SR Latches and Logic Gates

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