Operation of an all-optical bistable device dependent upon incident and transmitted optical power

1989 ◽  
Vol 25 (2) ◽  
pp. 139-143 ◽  
Author(s):  
R.S. Jameson ◽  
Wen-Tserr-Lee
Keyword(s):  
Optical Power ◽  
All Optical ◽  
Bistable Device

Frequency Encoded All Optical Tri-state Logic Gates NOT and NAND Using Semiconductor Optical Amplifier Based Interferometric Switches

2020 ◽  
Vol 10 (4) ◽  
pp. 369-380
Author(s):  
K. Maji ◽  
K. Mukherjee ◽  
A. Raja
Keyword(s):  
Semiconductor Optical Amplifier ◽  
Extinction Ratio ◽  
Optical Power ◽  
Logic Gates ◽  
Optical Amplifier ◽  
All Optical ◽  
State Frequency ◽  
Spontaneous Noise ◽  
First Time ◽  
Practical Feasibility

All optical tri-state frequency encoded logic gates NOT and NAND are proposed and numerically investigated using TOAD based interferometric switch for the first time to the best of our knowledge. The optical power spectrum, extinction ratio, contrast ration, and amplified spontaneous noise are calculated to analyze and confirm practical feasibility of the gates. The proposed device works for low switching energy and has high contrast and extinction ratio as indicated in this work.

All-optical power and data transfer in catheters using an efficient LED

2015 ◽  
Author(s):  
Martin B. van der Mark ◽  
Anneke van Dusschoten ◽  
Martin Pekar
Keyword(s):  
Data Transfer ◽  
Optical Power ◽  
All Optical

Multiple Quantum Well Heterostructures Showing Optical Nonlinearities at Low Intensity and Fast Recovery

1998 ◽  
Vol 07 (01) ◽  
pp. 37-45 ◽  
Author(s):  
L. Gastaldi ◽  
C. Rigo ◽  
D. Campi ◽  
L. Faustini ◽  
C. Coriasso ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Optical Switching ◽  
Multiple Quantum Well ◽  
Optical Power ◽  
Guided Wave ◽  
Multiple Quantum ◽  
Photogenerated Carrier ◽  
Fast Recovery ◽  
All Optical ◽  
All Optical Switching

This paper focuses on photogenerated carrier nonlinearities in InGaAs/InAlAs quantum wells (QWs) that use low optical power, display a relatively fast recovery time (280 ps down to 35 ps), and excellent optical properties in terms of the sharpness of the absorption edge. A guided-wave, all-optical switching device is demonstrated as an application, at a wavelength which is of interest to telecommunication systems (1.55 μm) and requires low control energy (<0.3 pJ/pulse). A key issue here is that the controlled introduction of defects in the QW heterostructures allows the time response to be fastened significantly without being detrimental to the performance of the device in terms of on-off contrast and switching energy. The preparation procedure is compatible with metalorganic-based growth techniques widespread in optoelectronics at 1.55 μm.

scholarly journals All-Optical Tuning of Light in WSe2-Coated Microfiber

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Zhiran Shen ◽  
He Zhu ◽  
Jiyu Hong ◽  
Xun Gui ◽  
Heyuan Guan ◽  
...  
Keyword(s):  
Optical Power ◽  
High Sensitivity ◽  
Fast Response ◽  
Optical Modulator ◽  
Pump Light ◽  
All Optical ◽  
Potential Applications ◽  
Tunable Device ◽  
Light Excitation ◽  
Pump Lasers

AbstractThe tungsten diselenide (WSe2) has attracted considerable interest owing to their versatile applications, such as p-n junctions, transistors, fiber lasers, spintronics, and conversion of solar energy into electricity. We demonstrate all-optical tuning of light in WSe2-coated microfiber (MF) using WSe2’s broad absorption bandwidth and thermo-optic effect. The transmitted optical power (TOP) can be tuned using external incidence pump lasers (405, 532, and 660 nm). The sensitivity under 405-nm pump light excitation is 0.30 dB/mW. A rise/fall time of ~ 15.3/16.9 ms is achieved under 532-nm pump light excitation. Theoretical simulations are performed to investigate the tuning mechanism of TOP. The advantages of this device are easy fabrication, all-optical control, high sensitivity, and fast response. The proposed all-optical tunable device has potential applications in all-optical circuitry, all-optical modulator, and multi-dimensionally tunable optical devices, etc.

All optical measurement of an unknown wideband microwave frequency

2016 ◽  
Vol 0 (0) ◽  
Author(s):  
A. Kumar ◽  
V. Priye ◽  
R. Raj Singh
Keyword(s):  
Optical Measurement ◽  
Optical Power ◽  
Microwave Frequency ◽  
Optical Amplifier ◽  
Optical Carrier ◽  
Microwave Frequencies ◽  
Mathematical Relation ◽  
All Optical ◽  
Even Order ◽  
Unknown Signal

AbstractA novel all optical measurement scheme is proposed to measure wideband microwave frequencies up to 30 GHz. The proposed method is based on a four-wave mixing (FWM) approach in a semiconductor optical amplifier (SOA) of both even order side-bands generated by an unknown microwave frequency modulating an optical carrier. The optical power of a generated FWM signal depends on frequency spacing between extracted side-bands. A mathematical relation is established between FWM power and frequency of an unknown signal. A calibration curve is drawn based on the mathematical relation which predicts the unknown frequency from power withdrawn after FWM.

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