The use of real-time optical feedback to improve outcomes

2014 ◽  
Author(s):  
Isidro B. Magaña ◽  
Pratik Adhikari ◽  
Raghuvara B. Yendluri ◽  
Glenn P. Goodrich ◽  
Jon A. Schwartz ◽  
...  
Keyword(s):  
Real Time ◽  
Optical Feedback

Real-time parametric estimation of velocity using optical feedback interferometry

2001 ◽  
Vol 50 (4) ◽  
pp. 915-919 ◽  
Author(s):  
G. Plantier ◽  
N. Servagent ◽  
A. Sourice ◽  
T. Bosch
Keyword(s):  
Real Time ◽  
Optical Feedback ◽  
Parametric Estimation

scholarly journals Real-time wavefront shaping through scattering media by all-optical feedback

2013 ◽  
Vol 7 (11) ◽  
pp. 919-924 ◽  
Author(s):  
Micha Nixon ◽  
Ori Katz ◽  
Eran Small ◽  
Yaron Bromberg ◽  
Asher A. Friesem ◽  
...  
Keyword(s):  
Real Time ◽  
Optical Feedback ◽  
Scattering Media ◽  
All Optical ◽  
Wavefront Shaping

Optical and Physical Characterization of Cu2-xSe Thin Films for Real Time Spectroscopic Ellipsometry on Cu(In,Ga)Se2-based Photovoltaic Devices

2009 ◽  
Vol 1210 ◽  
Author(s):  
James D Walker ◽  
Himal Khatri ◽  
Scott Little ◽  
Vikash Ranjan ◽  
Robert Collins ◽  
...  
Keyword(s):  
Real Time ◽  
Spectroscopic Ellipsometry ◽  
Growth Temperature ◽  
Room Temperature ◽  
Optical Model ◽  
High Efficiency ◽  
Optical Feedback ◽  
High Surface ◽  
Ex Situ ◽  
Photovoltaic Devices

AbstractIn situ, real time spectroscopic ellipsometry (RTSE) has been used to study the growth processes and optical properties of Cu2-xSe - an important binary compound in the fabrication of high efficiency copper indium gallium diselenide (CIGS) photovoltaic devices. It was found that the high surface roughness of the Cu2-xSe layers necessitated a “graded” optical model in order to extract meaningful dielectric functions at both 550 °C and room temperature. The optical model was verified at room temperature against SEM micrographs and reflectance measurements carried out ex situ. The growth temperature dielectric functions presented in this study are expected to allow for a greater level of control and understanding of the so-called 2- and 3-stage processes for CIGS fabrication in which a Cu2-xSe phase, present at the CIGS grain boundaries, acts as a fluxing agent for the growth of photovoltaic quality CIGS. Real time optical feedback via RTSE combined with the growth temperature dielectric functions presented here could play an important role in improving material fabrication on both the laboratory and industrial scales.

scholarly journals Real-time gas sensing based on optical feedback in a terahertz quantum-cascade laser

2017 ◽  
Vol 25 (24) ◽  
pp. 30203 ◽  
Author(s):  
Till Hagelschuer ◽  
Martin Wienold ◽  
Heiko Richter ◽  
Lutz Schrottke ◽  
Holger T. Grahn ◽  
...  
Keyword(s):  
Real Time ◽  
Quantum Cascade Laser ◽  
Gas Sensing ◽  
Optical Feedback ◽  
Quantum Cascade
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