Abstract: The grating was mounted on the materials with negative temperature coefficients. The experimental results show that the temperature co efficients of packaged fiber Bragg gratings are about 0.000 2 nm/℃, compared w ith 0.01 nm/℃ for an uncompensated grating. Furthermore, the optical fiber gra tings packaged in this way show the features of smaller volume, lighter weight a nd practice. This technique is simple and can be applicable in fiber communicati on systems.

Key words: fiber grating, temperature-compensating package, nega tive temperature coefficient