All-Optical Signal Upconversion using Optically-Injected DFB laser and Embedded Optoelectronic Oscillator for Radio-over-Fiber Applications

Abstract Increasing the speed of operation in all optical signal processing is very important. For reaching this goal one needs high speed optical devices. Optical half adders are one of the important building blocks required in optical processing. In this paper an optical half adder was proposed by combining nonlinear photonic crystal ring resonators with optical waveguides. Finite difference time domain method wase used for simulating the final structure. The simulation results confirmed that the rise time for the proposed structure is about 1 ps.

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Modeling and Design of Enhanced All Optical Signal Regeneration Technique

Optik ◽

10.1016/j.ijleo.2021.166696 ◽

2021 ◽

pp. 166696

Author(s):

Bhagwan Das ◽

M.F.L Abdullah ◽

Fayaz Ali Dharejo ◽

Farah Deeba ◽

Jawad Ali ◽

...

Keyword(s):

Optical Signal ◽

Signal Regeneration ◽

All Optical

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All-Optical Non-Inverted Parity Generator and Checker Based on Semiconductor Optical Amplifiers

Applied Sciences ◽

10.3390/app11041499 ◽

2021 ◽

Vol 11 (4) ◽

pp. 1499

Author(s):

Bingchen Han ◽

Junyu Xu ◽

Pengfei Chen ◽

Rongrong Guo ◽

Yuanqi Gu ◽

...

Keyword(s):

Optical Amplifiers ◽

Signal To Noise Ratio ◽

Low Cost ◽

Extinction Ratio ◽

Semiconductor Optical Amplifiers ◽

Optical Signal ◽

Probe Light ◽

All Optical ◽

Negative Effect ◽

Parity Generator

An all-optical non-inverted parity generator and checker based on semiconductor optical amplifiers (SOAs) are proposed with four-wave mixing (FWM) and cross-gain modulation (XGM) non-linear effects. A 2-bit parity generator and checker using by exclusive NOR (XNOR) and exclusive OR (XOR) gates are implemented by first SOA and second SOA with 10 Gb/s return-to-zero (RZ) code, respectively. The parity and check bits are provided by adjusting the center wavelength of the tunable optical bandpass filter (TOBPF). A saturable absorber (SA) is used to reduce the negative effect of small signal clock (Clk) probe light to improve extinction ratio (ER) and optical signal-to-noise ratio (OSNR). For Pe and Ce (even parity bit and even check bit) without Clk probe light, ER and OSNR still maintain good performance because of the amplified effect of SOA. For Po (odd parity bit), ER and OSNR are improved to 1 dB difference for the original value. For Co (odd check bit), ER is deteriorated by 4 dB without SA, while OSNR is deteriorated by 12 dB. ER and OSNR are improved by about 2 dB for the original value with the SA. This design has the advantages of simple structure and great integration capability and low cost.

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