A simple and efficient technique for an offset frequency shifter for Brillouin based distributed fibre sensing.

1997 ◽  
Author(s):  
V. Lecoeuche ◽  
D.J. Webb ◽  
C.N. Pannell ◽  
D.A. Jackson
Keyword(s):  
Efficient Technique ◽  
Frequency Shifter ◽  
Offset Frequency

Characterization of machined polystyrene foam

1989 ◽  
Vol 47 ◽  
pp. 372-373
Author(s):  
C. W. Price ◽  
E. F. Lindsey ◽  
R. M. Franks ◽  
M. A. Lane
Keyword(s):  
Surface Finish ◽  
Cell Walls ◽  
Surface Structures ◽  
Efficient Technique ◽  
Low Density ◽  
Polystyrene Foam ◽  
Planar Surfaces ◽  
Machining Characteristics

Diamond-point turning is an efficient technique for machining low-density polystyrene foam, and the surface finish can be substantially improved by grinding. However, both diamond-point turning and grinding tend to tear and fracture cell walls and leave asperities formed by agglomerations of fragmented cell walls. Vibratoming is proving to be an excellent technique to form planar surfaces in polystyrene, and the machining characteristics of vibratoming and diamond-point turning are compared.Our work has demonstrated that proper evaluation of surface structures in low density polystyrene foam requires stereoscopic examinations; tilts of + and − 3 1/2 degrees were used for the stereo pairs. Coating does not seriously distort low-density polystyrene foam. Therefore, the specimens were gold-palladium coated and examined in a Hitachi S-800 FESEM at 5 kV.

Investigation of Terahertz Polarized Frequency Shifter with Crystal Quartz Phase Sections

2007 ◽  
Vol 66 (4) ◽  
pp. 373-382
Author(s):  
V. K. Kiselyov ◽  
V. I. Bezborodov ◽  
P. K. Nesterov ◽  
M. S. Yanovsky
Keyword(s):  
Frequency Shifter ◽  
Crystal Quartz

Real Time Person Recognition and Attendance Marking Using Holistic Based Approach

2017 ◽  
Vol 7 (7) ◽  
pp. 302
Author(s):  
Reshma P ◽  
Muneer VK ◽  
Muhammed Ilyas P
Keyword(s):  
Face Recognition ◽  
Real Time ◽  
High Accuracy ◽  
Efficient Technique ◽  
Human Face ◽  
Traditional Methods ◽  
Person Recognition ◽  
The Face

Face recognition is a challenging task for the researches. It is very useful for personal verification and recognition and also it is very difficult to implement due to all different situation that a human face can be found. This system makes use of the face recognition approach for the computerized attendance marking of students or employees in the room environment without lectures intervention or the employee. This system is very efficient and requires very less maintenance compared to the traditional methods. Among existing methods PCA is the most efficient technique. In this project Holistic based approach is adapted. The system is implemented using MATLAB and provides high accuracy.

A NOVEL AND EFFICIENT TECHNIQUE FOR PREVENTION OF XSS ATTACKS USING KNAPSACK BASED CRYPTOGRAPHY

2020 ◽  
Vol 9 (7) ◽  
pp. 4513-4521
Author(s):  
D. Dembla ◽  
Y. Chaba ◽  
K. Yadav ◽  
M. Chaba ◽  
A. Kumar
Keyword(s):  
Efficient Technique

Tributary Mapping Multiplexing an Efficient Technique for High Speed Fiber Optic Communication

2018 ◽  
Vol 6 (2) ◽  
Author(s):  
Usman Illahi ◽  
Javed Iqbal ◽  
Muhammad Ismail Sulaiman ◽  
Muhammad Alam ◽  
Mazliham Mohd Su'ud
Keyword(s):  
Spectral Efficiency ◽  
High Speed ◽  
Fiber Optic ◽  
Single Channel ◽  
Efficient Technique ◽  
High Dispersion ◽  
Optical Filtering ◽  
Fiber Optic Communication ◽  
Optic Communication ◽  
Dispersion Tolerance

<p>A novel technique of multiplexing called Tributary Mapping Multiplexing (TMM) is<br />applied to a single channel wavelength division multiplexing system and performance is monitored on the basis of simulation results. To elaborate the performance of TMM in this paper, a 4-User TMM system over single wavelength channel is demonstrated. TMM showed significant tolerance against narrow optical filtering as compared to that of conventional TDM at the rate of 40 Gbit/s. The above calculations are made by optical filter bandwidth and dispersion tolerance that was allowed at minimum. The spectral efficiency achieved by this TMM was 1 b/s/Hz and it was executed by using transmitters and receivers of 10 Gbit/s without polarized multiplexing. The high spectral efficiency, high dispersion tolerance and tolerance against strong optical filtering makes TMM an efficient technique for High<br />Speed Fiber Optic Communication.</p>

Integrated-optic rotating waveplate frequency shifter

1988 ◽  
Vol 24 (21) ◽  
pp. 1348 ◽  
Author(s):  
R. Noe ◽  
D.A. Smith
Keyword(s):  
Frequency Shifter

Erratum: Demonstration of birefringent optical fibre frequency shifter employing torsional acoustic waves

1991 ◽  
Vol 27 (13) ◽  
pp. 1219
Author(s):  
M. Berwick ◽  
C.N. Pannell ◽  
P.St.J. Russell ◽  
D.A. Jackson
Keyword(s):  
Optical Fibre ◽  
Acoustic Waves ◽  
Frequency Shifter

scholarly journals Simple method for mid-infrared optical frequency comb generation with dynamic offset frequency tuning

APL Photonics ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 026103
Author(s):  
Mikhail Roiz ◽  
Krishna Kumar ◽  
Juho Karhu ◽  
Markku Vainio
Keyword(s):  
Frequency Tuning ◽  
Frequency Comb ◽  
Optical Frequency Comb ◽  
Optical Frequency ◽  
Simple Method ◽  
Mid Infrared ◽  
Comb Generation ◽  
Offset Frequency

Cascade FinFET Direct Coupled Amplifier with Power Efficient Technique

2021 ◽  
Author(s):  
Shreya Shree ◽  
Shweta Bharti ◽  
Chameli Reang ◽  
Aditya Pratyush ◽  
Pooja Joshi
Keyword(s):  
Efficient Technique ◽  
Power Efficient
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