Ultrasound imaging using all-optical power and signal transfer in catheters (Conference Presentation)

2017 ◽  
Author(s):  
Martin Pekar ◽  
Martin B. van der Mark
Keyword(s):  
Ultrasound Imaging ◽  
Optical Power ◽  
Signal Transfer ◽  
All Optical

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

scholarly journals Real-time all-optical ultrasound imaging of a dynamic heart valve phantom

2021 ◽  
Author(s):  
Richard J. Colchester ◽  
John T. Moore ◽  
Terry M. Peters ◽  
Malcolm C. Finlay ◽  
Adrien E. Desjardins
Keyword(s):  
Real Time ◽  
Heart Valve ◽  
Ultrasound Imaging ◽  
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 Through-needle all-optical ultrasound imaging in vivo: a preclinical swine study

2017 ◽  
Vol 6 (12) ◽  
pp. e17103-e17103 ◽  
Author(s):  
Malcolm C Finlay ◽  
Charles A Mosse ◽  
Richard J Colchester ◽  
Sacha Noimark ◽  
Edward Z Zhang ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
All Optical
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