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200-m optical fiber with an integrated electrode and its poling
Kenneth Lee1, Peifang Hu, Justin L Blows
1The Optical Fibre Technology Centre, Australian Photonics Cooperative Research Centre, University of Sydney, Sydney, NSW 2006, Australia. kenilee@oftc.usyd.edu.au
Optics Letters
|October 6, 2004
Summary
Researchers developed a novel germanosilica optical fiber with an integrated wire electrode, achieving lengths over 200m and low optical loss. This advancement enables scalable fabrication of poled optical fibers for nonlinear applications.
Area of Science:
- Materials Science
- Optoelectronics
- Nonlinear Optics
Background:
- Germanosilica optical fibers with internal electrodes are challenging to fabricate in long lengths.
- Existing methods limit the integration of electrodes, hindering scalability for nonlinear optical applications.
Purpose of the Study:
- To develop a scalable method for manufacturing long-length germanosilica optical fibers with integrated wire electrodes.
- To demonstrate the feasibility of thermal poling in such fibers to induce second-order nonlinearity.
Main Methods:
- A new fabrication process integrating a wire electrode into the germanosilica fiber during the drawing stage.
- Optical loss characterization at 1550 nm.
- Thermal poling of a 0.9-m fiber section to induce nonlinear optical properties.
Main Results:
- Successfully manufactured over 200 meters of germanosilica optical fiber with an internal wire electrode.
- Achieved optical loss below the measurement floor of 0.5 dB/m at 1550 nm.
- Induced a permanent second-order nonlinearity of 0.0125 pm/V in a 0.9-m poled section.
Conclusions:
- The integrated wire electrode fabrication method allows for significantly longer internal electrode optical fibers than previously reported.
- This technique is scalable to lengths exceeding 1 km, paving the way for practical applications of poled germanosilica fibers.
- Further methods to enhance the induced nonlinearity are under investigation.