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Tunable mechanically induced long-period fiber gratings
Optics Letters
|December 8, 2007
Summary
Researchers created mechanically induced long-period fiber gratings (LPFGs) using a grooved plate. These tunable and erasable LPFGs offer similar performance to photoinduced gratings and can function as polarizers.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Long-period fiber gratings (LPFGs) are crucial optical components.
- Traditional LPFGs are often fabricated using photochemical methods.
- Existing methods can be permanent and lack tunability.
Purpose of the Study:
- To experimentally characterize mechanically induced LPFGs.
- To explore the advantages of mechanical fabrication for LPFGs.
- To assess the potential of these gratings as tunable optical filters and polarizers.
Main Methods:
- Fabrication of LPFGs by pressing a grooved plate against a fiber.
- Experimental characterization of transmission spectra.
- Evaluation of temperature stability and polarization dependence.
Main Results:
- Successfully created mechanically induced LPFGs.
- Achieved transmission spectra and temperature stability comparable to photoinduced LPFGs.
- Demonstrated tunability, erasability, and reconfigurability.
- Observed polarization dependence, enabling polarizer functionality.
Conclusions:
- Mechanical induction provides a simple, inexpensive method for LPFG fabrication.
- Mechanically induced LPFGs offer unique advantages in tunability and reconfigurability.
- These gratings are versatile, serving as both filters and polarizers.
