Propagation-mode near-field method for measuring optical waveguides of graded index profile: some considerations on TM-modes

1998 ◽  
Vol 29 (6) ◽  
pp. 499-503 ◽  
Author(s):  
Haiming Wang
Keyword(s):  
Optical Waveguides ◽  
Near Field ◽  
Field Method ◽  
Propagation Mode ◽  
Index Profile ◽  
Graded Index

Improved propagation-mode near-field method for refractive-index profiling of optical waveguides

1996 ◽  
Vol 35 (12) ◽  
pp. 2060 ◽  
Author(s):  
G. L. Yip ◽  
P. C. Noutsios ◽  
L. Chen
Keyword(s):  
Refractive Index ◽  
Optical Waveguides ◽  
Near Field ◽  
Field Method ◽  
Propagation Mode

Measurements. Accuracy Improvement of the Refracted Near-Field Method by Laser Cavity Stabilization

1984 ◽  
Vol 5 (4) ◽  
Author(s):  
B. Hillerich
Keyword(s):  
Refractive Index ◽  
Optical Fibers ◽  
Near Field ◽  
Laser Cavity ◽  
Refractive Index Profile ◽  
Field Method ◽  
Laser Resonator ◽  
Index Profile ◽  
Accuracy Improvement ◽  
Active Stabilization

SummaryFor accurate refractive-index profile measurements of optical fibers with the refracted near-field method the output signal of the instrument has to be extremely stable. It has been found that some instability is caused by beam shifts due to “mode sweeping” in the laser resonator. By active stabilization of the laser cavity the residual fluctuations are reduced to 10

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