Comparison of the thermal tuning capability of different types of Bragg grating filters for wavelength division multiplexing applications

• Type: Article in International Scientific Journal
• Date: 2003

Authors

Lima, MJN (Author) Other; Teixeira, ALJ (Author) Other; da Rocha, JRF (Author) Other; Frazao, O (Author) Other; Andre, PS (Author) Other

Journal

Title: Optical Engineering

Vol. 42

Pages: 2502-2505

ISSN: 0091-3286

Publisher: SPIE

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Other information

Authenticus ID: P-000-FE6

DOI: 10.1117/1.1593661

Abstract (EN): We compare the thermal tuning capabilities of two type I gratings written in unloaded and in hydrogen-loaded germanium-doped silica fibers, and a type IIa grating written in unloaded fiber. The hydrogen-loaded grating is annealed after writing, to remove any unreacted hydrogen. We further study the gratings' response stability with temperature, an important property when these devices are used as optical filters in wavelength division multiplexing systems. Experimental results show that the worst option is the type I grating in unloaded fiber, which presents the highest bandwidth and group delay variations with temperature, so that it is the least suitable as a thermotunable optical filter in wavelength-multiplexed systems. For the other two options, the bandwidth and group delay variations are much smaller, the lowest values being obtained with the hydrogen-loaded type I grating, and the best thermal tuning efficiency with the type IIa grating. (C) 2003 Society of Photo-Optical Instrumentation Engineers.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4