Hybrid polymer-silica waveguides provide tunability

Paula Noaker Powell

Air-silica microstructure fibers allow a diverse range of guided-mode properties to be created. The results can produce unique spectral characteristics when long and short-period gratings are written into photosensitive regions. In addition, it is possible to introduce polymers into the air regions to produce hybrid polymer-silica waveguides that allow enhanced tunability of propagation properties. One example recently investigated by Lucent Technologies Bell Labs (Murray Hill, NJ) and the Laboratory for Physical Sciences (College Park, MD) is a hybrid polymer-silica microstructure fiber with a UV-induced Bragg grating in the fiber core. A key feature-the large air regions of the fiber-reduces fiber fabrication constraints and simplifies the process of polymer infusion into the air regions.

Despite the lack of circular symmetry resulting from the microstructure, the polymer tuning observed is similar to that seen in standard fiber surrounded by polymers or oils. The polymer is contained only inside the air regions, so the outer air-silica interface is intact, allowing, for example, fabrication of on-fiber thin-film heaters for temperature tuning. According to the researchers involved in the project, the Bragg grating transmission spectrum clearly shows different design regimes in which cladding resonances can be wavelength-tuned, suppressed, or amplitude-tuned. This tunability is possible because of the strong temperature dependence of the polymer refractive index. For more information, contact Paul S. Westbrook at westbrook@lucent.com.

Get All the Laser Focus World News Delivered to Your Inbox

Subscribe to Laser Focus World Magazine or email newsletter today at no cost and receive the latest news and information.

 Subscribe Now

Most Popular Articles

Webcasts

Understanding Polarization and Optical Coatings

Light is an electromagnetic wave, but, at optical frequencies, it is its electric field that interacts with materials, with the direction of the electric fie...

Wave Optics Simulations

An add-on to COMSOL Multiphysics®, the Wave Optics Module offers capabilities for modeling optical phenomena. The innovative beam envelope method is among th...

Lens Design – Tools for designing manufacturable aspheres for complex optical assemblies

Designing aspheres that may be successfully fabricated and tested can be a frustrating experience. The range of possible aspheres is much larger than the ran...

Ray Optics Simulations with COMSOL Multiphysics

The Ray Optics Module can be used to simulate electromagnetic wave propagation when the wavelength is much smaller than the smallest geometric entity in the ...
White Papers

High-Power Diode Lasers under External Optical Feedback

We carried out a comprehensive study on single emitters with different antireflection (AR) coatin...

LED Reflector and Lens Simulation using TracePro® Illumination Design and Analysis Software

TracePro® allows users to design, analyze, and optimize LED lighting systems using software simul...

Degradation studies of a VECSEL gain structure using a stable green pump laser

The degradation of the gain structure of a red-emitting Optically Pumped Semiconductor (OPS) Vert...
Technical Digests

Fiber for Fiber Lasers

The development of higher-power and higher-energy fiber lasers has benefited from many advances i...

Click here to have your products listed in the Laser Focus World Buyers Guide.

PRESS RELEASES

Synopsys' CODE V Version 10.4 is now generally available

03/30/2012 Synopsys' CODE V Enhances Analysis of Precision Optical Systems.

Scratch-resistant mirror with gold surface

03/12/2012 In the LINOS catalog from Qioptiq you will now find the scratch-resistant mirror with gold surface.
Social Activity
  •  
  •  
  •  
  •  
Copyright © 2007-2014. PennWell Corporation, Tulsa, OK. All Rights Reserved. PRIVACY POLICY | TERMS AND CONDITIONS