Pulsed-laser vibrometer using photoelectromotive-force sensors

2003 ◽  
Vol 83 (9) ◽  
pp. 1893-1895 ◽  
Author(s):  
Ponciano Rodriguez ◽  
Sudhir Trivedi ◽  
Feng Jin ◽  
Chen-Chia Wang ◽  
Serguei Stepanov ◽  
...  
Keyword(s):  
Pulsed Laser ◽  
Force Sensors ◽  
Laser Vibrometer ◽  
Photoelectromotive Force

Human Life Signs Detection Using High-Sensitivity Pulsed Laser Vibrometer

2007 ◽  
Vol 7 (9) ◽  
pp. 1370-1376 ◽  
Author(s):  
Chen-Chia Wang ◽  
Sudhir B. Trivedi ◽  
Feng Jin ◽  
Serguei Stepanov ◽  
Zhongyang Chen ◽  
...  
Keyword(s):  
Human Life ◽  
Pulsed Laser ◽  
High Sensitivity ◽  
Laser Vibrometer

High sensitivity pulsed laser vibrometer and its application as a laser microphone

2009 ◽  
Vol 94 (5) ◽  
pp. 051112 ◽  
Author(s):  
Chen-Chia Wang ◽  
Sudhir Trivedi ◽  
Feng Jin ◽  
V. Swaminathan ◽  
Ponciano Rodriguez ◽  
...  
Keyword(s):  
Pulsed Laser ◽  
High Sensitivity ◽  
Laser Vibrometer

From Pulsed Laser Vibrometer to Optical Doppler Velocimeter: Laser Metrology Using Photo-EMF Sensors

2004 ◽  
Author(s):  
Chen-Chia Wang ◽  
Sudhir Trivedi ◽  
Feng Jin ◽  
Greg Elliott ◽  
S. Tse ◽  
...  
Keyword(s):  
Pulsed Laser ◽  
Laser Vibrometer ◽  
Laser Metrology

Biological Life Signs Detection Using High Sensitivity Pulsed Laser Vibrometer

2007 ◽  
Author(s):  
Chen-Chia Wang ◽  
Sudhir Trivedi ◽  
Feng Jin ◽  
Zhongyang Chen ◽  
Jacob Khurgin ◽  
...  
Keyword(s):  
Pulsed Laser ◽  
High Sensitivity ◽  
Laser Vibrometer

scholarly journals A new kind of laser microphone using high sensitivity pulsed laser vibrometer

2008 ◽  
Author(s):  
Chen-Chia Wang ◽  
Sudhir Trivedi ◽  
Feng Jin ◽  
V. Swaminathan ◽  
Narasimha S. Prasad
Keyword(s):  
Pulsed Laser ◽  
High Sensitivity ◽  
Laser Vibrometer

Laser vibrometer using GaAs adaptive photodetectors based on the effect of the non-steady-state photoelectromotive force

1998 ◽  
Author(s):  
Igor A. Sokolov ◽  
Vladimir V. Kulikov ◽  
Costas Kalpouzos ◽  
Nikos A. Vainos
Keyword(s):  
Steady State ◽  
Laser Vibrometer ◽  
Photoelectromotive Force

Observations on the growth of YBa2Cu3O7-δ thin films on MgO by pulsed-laser ablation

1991 ◽  
Vol 49 ◽  
pp. 1068-1069
Author(s):  
M. Grant Norton ◽  
C. Barry Carter
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Laser Ablation ◽  
Substrate Surface ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Laser Ablation Process ◽  
Deposition Parameters

Pulsed-laser ablation has been widely used to produce high-quality thin films of YBa2Cu3O7-δ on a range of substrate materials. The nonequilibrium nature of the process allows congruent deposition of oxides with complex stoichiometrics. In the high power density regime produced by the UV excimer lasers the ablated species includes a mixture of neutral atoms, molecules and ions. All these species play an important role in thin-film deposition. However, changes in the deposition parameters have been shown to affect the microstructure of thin YBa2Cu3O7-δ films. The formation of metastable configurations is possible because at the low substrate temperatures used, only shortrange rearrangement on the substrate surface can occur. The parameters associated directly with the laser ablation process, those determining the nature of the process, e g. thermal or nonthermal volatilization, have been classified as ‘primary parameters'. Other parameters may also affect the microstructure of the thin film. In this paper, the effects of these ‘secondary parameters' on the microstructure of YBa2Cu3O7-δ films will be discussed. Examples of 'secondary parameters' include the substrate temperature and the oxygen partial pressure during deposition.

Microanalysis of silicate glass films grown on α-Al2O3 by pulsed-laser deposition

1993 ◽  
Vol 51 ◽  
pp. 438-439
Author(s):  
Michael P. Mallamaci ◽  
James Bentley ◽  
C. Barry Carter
Keyword(s):  
Liquid Phase ◽  
Single Crystal ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Ceramic Materials ◽  
Laser Deposition ◽  
Triple Junctions ◽  
Ion Milling ◽  
Multicomponent Oxides ◽  
Glass Films

Glass-oxide interfaces play important roles in developing the properties of liquid-phase sintered ceramics and glass-ceramic materials. Deposition of glasses in thin-film form on oxide substrates is a potential way to determine the properties of such interfaces directly. Pulsed-laser deposition (PLD) has been successful in growing stoichiometric thin films of multicomponent oxides. Since traditional glasses are multicomponent oxides, there is the potential for PLD to provide a unique method for growing amorphous coatings on ceramics with precise control of the glass composition. Deposition of an anorthite-based (CaAl2Si2O8) glass on single-crystal α-Al2O3 was chosen as a model system to explore the feasibility of PLD for growing glass layers, since anorthite-based glass films are commonly found in the grain boundaries and triple junctions of liquid-phase sintered α-Al2O3 ceramics.Single-crystal (0001) α-Al2O3 substrates in pre-thinned form were used for film depositions. Prethinned substrates were prepared by polishing the side intended for deposition, then dimpling and polishing the opposite side, and finally ion-milling to perforation.

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