Preparation of 2D MoS2/Graphene Heterostructure through a Monolayer Intercalation Method and its Application as an Optical Modulator in Pulsed Laser Generation

2015 ◽  
Vol 3 (7) ◽  
pp. 937-942 ◽  
Author(s):  
Gang Zhao ◽  
Jia Hou ◽  
Yongzhong Wu ◽  
Jingliang He ◽  
Xiaopeng Hao
Keyword(s):  
Pulsed Laser ◽  
Laser Generation ◽  
Optical Modulator

Time Resolved LADA Using a Modulated Pulsed Laser to Fault Isolate Bridging Defects and Framing High Accuracy Physical FA Plan in 14 nm FinFET Technologies

2017 ◽  
Author(s):  
Gaurav Mattey ◽  
Lava Ranganathan
Keyword(s):  
Continuous Wave ◽  
Pulsed Laser ◽  
Signal Propagation ◽  
Spot Size ◽  
Turnaround Time ◽  
Fault Isolation ◽  
Optical Modulator ◽  
Success Rates ◽  
Time Resolved ◽  
Cw Laser

Abstract Dynamic Laser Stimulation using Continuous Wave (CW) Lasers has been a very important technique in fault isolating soft failures due to process defects and design speed paths in microprocessors. However, the rapid scaling down of the process technologies and the high density of logic laid out in silicon has made it difficult to precisely fault isolate using a conventional continuous wave laser which has a laser spot size of about ~300nm. Also, the remnant effects of a CW laser DLS like banding due to n-well interactions make it further difficult to achieve high resolution fault isolation. In this paper we discuss how by using a modulated pico-second pulsed laser, a DLS suspect is isolated to cell internal nets, which using a CW laser spanned across multiple cells. This is achieved by modulating the pulsed laser using an Electro-optical modulator and restricting the stimulation to only those parts of a test-pattern where the signal propagation occurs. Also, by synchronizing the pulsed laser with the clock of the test-program and changing the laser pulse delivery in time, high stimulation levels were achieved without being invasive. This revealed extra data points (DLS sites) that can help with making precisely accurate Physical FA plans that reduce turnaround time and also ensure high success rates. Specifically, in the case of a bridging defect between two nets wherein DLS sites were only seen on the victim net using conventional CW laser, the time resolved pulsed laser revealed DLS sites on the aggressor net as well. This confirmed the bridging between the two nets since the aggressor net was not electrically connected with the victim net. We discuss in detail how the DLS sites play their role in framing the perfect Physical FA plan. A detailed study of the resolution achieved using time resolved pulsed laser and its comparison with the same using a CW laser is shown on 14nm FinFET technology

Ultrasonic Signals Generated by a Laser Source in Film/Substrate Systems

1999 ◽  
Author(s):  
T. W. Murray ◽  
Z. Guo ◽  
S. Krishnaswamy ◽  
J. D. Achenbach
Keyword(s):  
Mechanical Properties ◽  
Time Domain ◽  
Michelson Interferometer ◽  
Pulsed Laser ◽  
Laser Source ◽  
Laser Generation ◽  
Ultrasonic Signals ◽  
Acoustic Wave Generation ◽  
The Time Domain ◽  
Film Substrate

Abstract A model for the pulsed laser generation of ultrasound in an isotropic film on a semi-infinite substrate is presented. The model gives the time domain displacement of the system as a function of the density and mechanical properties of the film and substrate and the thermal properties of the film. Theoretical signals are calculated and analyzed for both a slow layer on a fast substrate and a fast layer on a slow substrate. The model has been verified experimentally using a 1 ns Nd:YAG laser source for acoustic wave generation and a stabilized Michelson interferometer for detection. Experimental and theoretical signals agree well for both fast on slow and slow on fast systems.

255mJ All-Fiber Pulsed Laser Generation and solutionof Parasitic Oscillation

2021 ◽  
Author(s):  
shijie wang ◽  
Xianfeng Lin ◽  
Zhilun Zhang ◽  
Ying-bin Xing ◽  
Lei Liao ◽  
...  
Keyword(s):  
Pulsed Laser ◽  
Laser Generation ◽  
Parasitic Oscillation

Mesoporous Carbon Nanospheres as Broadband Saturable Absorbers for Pulsed Laser Generation

2018 ◽  
Vol 6 (16) ◽  
pp. 1800606 ◽  
Author(s):  
Fang Wang ◽  
Ying Jing ◽  
Zhe Kang ◽  
Libo Zhou ◽  
Zhenrui Li ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Pulsed Laser ◽  
Laser Generation ◽  
Carbon Nanospheres ◽  
Saturable Absorbers

The effect of carboxymethylcellulose host concentration on the performance of mode-locked pulsed laser generation

2021 ◽  
Vol 122 ◽  
pp. 111699
Author(s):  
Harith Ahmad ◽  
Hafiz Hamsan ◽  
Siti Aisyah Reduan ◽  
Nur Farahin Norisham
Keyword(s):  
Pulsed Laser ◽  
Laser Generation

A pulsed photoacoustic investigation of ultrasonic mode conversion

1986 ◽  
Vol 64 (9) ◽  
pp. 1334-1340 ◽  
Author(s):  
D. A. Hutchins ◽  
F. Nadeau ◽  
P. Cielo
Keyword(s):  
Nondestructive Testing ◽  
Surface Waves ◽  
Mode Conversion ◽  
Pulsed Laser ◽  
Longitudinal Shear ◽  
Laser Generation ◽  
Bulk Waves ◽  
Interferometric Detection

Experiments have been undertaken into the generation and detection of ultrasonic transients in metals over a 40-MHz bandwidth, using pulsed-laser generation and interferometric detection. Longitudinal, shear, and surface waves have been investigated, and their form compared favorably to theory. The techique has been used to study the interaction of surface and bulk waves with slots in the surface of a plate. It has been shown that significant mode conversion occurred from surface to bulk waves and vice versa. The significance of this result to nondestructive testing is discussed.

Nanosecond pulsed laser generation of holographic structures on metals

2016 ◽  
Author(s):  
Krystian L. Wlodarczyk ◽  
Marcus Ardron ◽  
Nick J. Weston ◽  
Duncan P. Hand
Keyword(s):  
Pulsed Laser ◽  
Laser Generation ◽  
Nanosecond Pulsed Laser
Sign in / Sign up

Export Citation Format

Share Document