Study of dynamics of sweat glands of human finger tip using all-optical-fiber high-speed OCT

In order to realize the large capacity of ultra-high-speed optical fiber transmission, optical modulation and reuse is one of crucial technology. This article discusses MAMSK modulation format all-optical OOFDM transmission system. The MAMSK modulation format with the method of phase modulation combined with multiple amplitude modulation, at the same time on the signal phase and amplitude modulation information, achieve the goal of lower code rate. All-optical OOFDM multiplexing technology is the electric field of OFDM, half its adjacent subcarrier frequency spectrum overlap, so the spectrum efficiency is very high, is a kind of very potential recovery technology.

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10 Gbit/s all-optical pulse discriminator using a high-speed saturable absorber optical gate

11th International Conference on Integrated Optics and Optical Fibre Communications. 23rd European Conference on Optical Communications IOOC-ECOC97 ◽

10.1049/cp:19971425 ◽

1997 ◽

Author(s):

A. Hirano

Keyword(s):

Saturable Absorber ◽

High Speed ◽

Optical Pulse ◽

All Optical ◽

Optical Gate

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An all optical photonic crystal half adder suitable for optical processing applications

Journal of Optical Communications ◽

10.1515/joc-2020-0261 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Hamed Azhdari ◽

Sahel Javahernia

Keyword(s):

Photonic Crystal ◽

Optical Waveguides ◽

High Speed ◽

Building Blocks ◽

Optical Signal ◽

Ring Resonators ◽

Optical Processing ◽

Nonlinear Photonic Crystal ◽

Half Adder ◽

All Optical

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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High speed optical switching gain based EDFA model with 30 Gb/s NRZ modulation code in optical systems

Journal of Optical Communications ◽

10.1515/joc-2020-0223 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Mahmoud M. A. Eid ◽

Ahmed Nabih Zaki Rashed ◽

Keyword(s):

Optical Fiber ◽

High Speed ◽

Optical Switching ◽

Fiber Amplifier ◽

Optical Systems ◽

Power Budget ◽

Erbium Doped Fiber Amplifier ◽

Amplifier Model ◽

Modulation Rate ◽

Modulation Code

AbstractThis study presents high speed optical switching gain based Erbium doped fiber amplifier model. By using the proposed model the optical fiber loss can be minimized. The system is stabilized with the power budget of 25.875 mW a long 75 km as a length of optical fiber in this study can be verified. The modulation rate of 10 Gb/s can be upgrade up to reach 30 Gb/s. The suitable power for the optical transmitter is −2.440 dBm and NRZ modulation code is verified. The receiver sensitivity can be upgraded with the minimum bit error rate and max Q factor are 1.806 e−009 and 5.899.

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Dual-shot dynamics and ultimate frequency of all-optical magnetic recording on GdFeCo

Light Science & Applications ◽

10.1038/s41377-020-00451-z ◽

2021 ◽

Vol 10 (1) ◽

Author(s):

Sicong Wang ◽

Chen Wei ◽

Yuanhua Feng ◽

Hongkun Cao ◽

Wenzhe Li ◽

...

Keyword(s):

Magnetization Reversal ◽

Energy Efficient ◽

High Speed ◽

Data Transfer ◽

Laser Pulses ◽

Time Resolved ◽

All Optical ◽

Fs Laser ◽

High Speed Data ◽

Natural Way

AbstractAlthough photonics presents the fastest and most energy-efficient method of data transfer, magnetism still offers the cheapest and most natural way to store data. The ultrafast and energy-efficient optical control of magnetism is presently a missing technological link that prevents us from reaching the next evolution in information processing. The discovery of all-optical magnetization reversal in GdFeCo with the help of 100 fs laser pulses has further aroused intense interest in this compelling problem. Although the applicability of this approach to high-speed data processing depends vitally on the maximum repetition rate of the switching, the latter remains virtually unknown. Here we experimentally unveil the ultimate frequency of repetitive all-optical magnetization reversal through time-resolved studies of the dual-shot magnetization dynamics in Gd27Fe63.87Co9.13. Varying the intensities of the shots and the shot-to-shot separation, we reveal the conditions for ultrafast writing and the fastest possible restoration of magnetic bits. It is shown that although magnetic writing launched by the first shot is completed after 100 ps, a reliable rewriting of the bit by the second shot requires separating the shots by at least 300 ps. Using two shots partially overlapping in space and minimally separated by 300 ps, we demonstrate an approach for GHz magnetic writing that can be scaled down to sizes below the diffraction limit.

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