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Updated: Jun 29, 2026
08:48
Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
Highly nonlinear silica suspended core fibers
Liang Dong1, Brian K Thomas, Libin Fu
1IMRA America Inc, 1044 Woodridge Avenue, Ann Arbor, MI 48105, USA. ldong@imra.com
Optics Express
|October 15, 2008
Summary
Suspended-core fibers offer a simpler solution for nonlinear applications by reducing confinement loss with increased air-cladding width. This breakthrough enables a new class of low-loss, all-fiber nonlinear devices.
Area of Science:
- Optical Fiber Technology
- Nonlinear Optics
- Materials Science
Background:
- Suspended-core fibers (SCFs) are crucial for nonlinear optical applications.
- Photonic crystal fibers (PCFs) with numerous air holes present fabrication challenges.
- Minimizing loss in micro-structured fibers is essential for device performance.
Purpose of the Study:
- To systematically investigate and optimize confinement loss in SCFs.
- To demonstrate the effectiveness of air-cladding width for loss reduction.
- To develop SCFs suitable for advanced nonlinear applications.
Main Methods:
- Fabrication and characterization of SCFs with varying air-cladding widths.
- Measurement of confinement loss for sub-micron core diameters.
- Splice loss and transmission loss measurements at 1.55 micrometers.
Main Results:
- Confinement loss in SCFs is effectively reduced by increasing air-cladding width.
- Demonstrated a 1.27 micrometer core diameter SCF with sub-dB splice loss to Hi1060.
- Achieved a record low transmission loss of 0.078 dB/m at 1.55 micrometers for this core size.
Conclusions:
- Increased air-cladding width offers a simpler and effective method to reduce confinement loss in SCFs.
- SCFs with high nonlinearity, low splice loss, and low transmission loss are feasible.
- These SCFs will enable a new generation of low-loss all-fiber nonlinear devices.
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