Prof. Werner Blohm Profile

Prof. Werner Blohm

at Jade Hochschule

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 21 June 2019 Paper

Determination of optical fiber layer parameters by inverse evaluation of lateral scattering patterns

Gunnar Claussen, Werner Blohm

Proceedings Volume 11056, 110561B (2019) https://doi.org/10.1117/12.2524223

KEYWORDS: Scattering, Refractive index, Light scattering, Optical fibers, Inverse scattering problem, Optimization (mathematics), Inverse problems, Algorithm development

Read Abstract +

Step-index fibers consisting of two (or more) concentric layers of different transparent materials are common in optical telecommunication technology. Our aim is to establish algorithms allowing for the determination of the parameters (e.g., diameters) of these layers by evaluation of the lateral scattering pattern originating under planewave monochromatic illumination perpendicular to the fiber axis. We investigate numerical simulations only, i.e. applying the corresponding parameter estimation algorithms to numerically generated scattering patterns with known geometry and optical parameter values. We consider three algorithms for parameter determination. The first is the iteratively regularized GaussNewton (IRGN) algorithm, which minimizes the norm ||F(q) − u∞||₂ of the difference between the pattern for the parameters qn and the input u∞, but only locally. However, local minima in the norm “landscape” are spaced periodically, which we utilize. The second approach treats parameter determination as the optimization problem of minimizing ||F(q)−u∞||₂ globally, subject to the Dividing Rectangles (DiRect) algorithm. The third approach hybridizes both optimization methods. The results show that the modified IRGN algorithm is considerably faster for cases where the scattering intensities are superimposed with no or little noise. In terms of precision, the DiRect algorithm and its hybrid variant perform slightly better. These algorithms also terminate quicker for increasing noise. This, however, highlights the general trade-off between calculation times and precision.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years