Optical fibre long period gratings with a photochromic overlayer
Abstract
Results are presented on the all-optical tuning of the attenuation bands of an optical fiber long period grating utilizing a photochromic outcladding overlayer. The outcladding overlayer consists of PMMA polymer doped with the photochromic molecule of spiropyran. The spectral transmission characteristics of the long period grating are reversibly altered using sequential exposures of 355 nm and 532 nm, Nd:YAG laser radiation. The spectra recorded refer to long period grating notch shifts and extinction ratio modification of 1.2 nm and 0.5 dB, respectively.
- Publication:
-
International Commission for Optics Topical Meeting on Emerging Trends and Novel Materials in Photonics
- Pub Date:
- November 2010
- DOI:
- 10.1063/1.3521370
- Bibcode:
- 2010AIPC.1288...55K
- Keywords:
-
- optical fibres;
- Bragg gratings;
- laser beam effects;
- gas lasers;
- optical switches;
- 42.81.-i;
- 42.79.Dj;
- 42.60.Jf;
- 42.55.Lt;
- 42.79.Ta;
- Fiber optics;
- Gratings;
- Beam characteristics: profile intensity and power;
- spatial pattern formation;
- Gas lasers including excimer and metal-vapor lasers;
- Optical computers logic elements interconnects switches;
- neural networks