Abstract
A new method for fabricating long-period gratings (LPGs) in photonic crystal fibers (PCFs) is presented. A tightly focused femtosecond infrared laser beam scans across a PCF periodically, resulting in periodic filling of cladding air-holes through a micro-explosion and redeposition process and forming an LPG. Strong resonance of ∼26 dB has been demonstrated with a grating length of <5 mm. An annealed LPG demonstrated stable operation at 800 °C for over 30 h.
Original language | English |
---|---|
Article number | 5570903 |
Pages (from-to) | 1635-1637 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 22 |
Issue number | 22 |
DOIs | |
Publication status | Published - 5 Nov 2010 |
Keywords
- Femtosecond laser micromachining
- long-period grating (LPG)
- optical fiber sensor
- photonic crystal fiber (PCF)
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics
- Electronic, Optical and Magnetic Materials