Related Experiment Video
Updated: Jun 22, 2026
11:08
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Transition, radiation and propagation loss in polymer multimode waveguide bends.
Optics Express
|June 18, 2009
Summary
Insertion loss in multimode polymer waveguides was analyzed. The lowest loss of 0.74 dB was achieved with a 50 µm square waveguide and a 13.5 mm bend radius, optimizing optical performance.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
- Waveguide Technology
Background:
- Multimode polymer waveguides are crucial for optical communication.
- Understanding insertion loss components is vital for device optimization.
- Existing methods for propagation loss measurement can be destructive.
Purpose of the Study:
- To characterize insertion loss in multimode polymer waveguide bends.
- To resolve insertion loss into transition, radiation, and propagation components.
- To introduce a non-destructive method for propagation loss calculation.
Main Methods:
- Experimental measurement and Beam Propagation Method (BPM) modeling of waveguide bends.
- Calibration and comparison of experimental and modeled curves.
- Utilizing nested bends for non-destructive propagation loss calculation.
Main Results:
- Insertion loss components were resolved for the first time in multimode rectangular waveguides.
- The lowest insertion loss achieved was 0.74 dB.
- Optimal performance was observed for a 50 µm square cross-section waveguide with a 13.5 mm bend radius and a refractive index difference (Deltan) of 0.0296.
Conclusions:
- The study provides design curves for multimode polymer waveguide bends.
- A novel, non-destructive method for propagation loss measurement was successfully implemented.
- The findings offer valuable insights for optimizing polymer waveguide performance in optical applications.
Related Concept Videos
01:21Deformations in a Transverse Cross Section
When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...
01:07Propagation of Waves
When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
01:11Bending of Members Made of Several Materials
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
01:30Propagation Speed of Electromagnetic Waves
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
01:28Standing Waves in a Cavity
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
01:19Members Made of Elastoplastic Material
The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
As the bending moment...