Sains Malaysiana 31: 87-91 (2002) Sains Fizis dan Gunaan /
Physical and Applied Sciences
Temperature Sensitivity of Fibre Bragg Gratings Fabricated
in High Germania Boron Co-doped Optical Fibre
S.W. Harun, P. Poopalan & H. Ahmad
Physics Department, Faculty of Science
University Malaya
50603 Kuala Lumpur Malaysia
ABSTRACT
The Bragg wavelength drift in fibre Bragg gratings (FBGS) fabricated in high germania boron co-doped optical fibre with respect to temperature variation is studied. The FBG is subjected to temperature variation using an oven. The Bragg wavelength shift with temperature variation is mostly due to thermooptic effects. The main constituent of the FBG fibre is silica and germanosilicate glass for which the wavelength increases with temperature. The experimental result shows that the thermal response for the FBG is about 0.010 nmoC, which is consistent with theoretical prediction.
ABSTRAK
Perubahan jarak gelombang Bragg dalam celahan Bragg gentian yang dicetak dalam gentian optik yang mengandungi germanium dan boron yang tinggi terhadap perubahan suhu telah dikaji. Celahan Bragg gentian ini telah dikenakan dengan perubahan suhu di dalam relau. Jarak gelombang Bragg berubah dengan suhu disebabkan oleh kesan termo-optik. Jarak gelombang ini bertambah dengan pertambahan suhu kerana bahan utama dalam celahan Bragg gentian terdiri daripada silika dan germanosilikat kaca. Keputusan ujikaji menunjukkan kadar perubahan jarak gelombang dengan suhu lebih kurang 0.010 nmoC dan nilai ini adalah sangat hampir dengan teori.
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