Abstract
We report a theoretical and experimental investigation of the dispersion property of long-period fiber gratings in B/Ge codoped fiber. A novel concept of a mode ultrasensitive zone defined by a region in which the phase-matching conditions are close to the dispersion turning points is proposed. The transition from a dual-resonance state to a dispersion turning point is revealed for a set of ultrasensitive-zone gratings during the UV-writing process. We explore the sensitivity characteristics near the dispersion turning points, with the aim of implementing two types of temperature sensor with sensitivity 2 orders of magnitude higher than that of the conventional long-period gratings.
| Original language | English |
|---|---|
| Pages (from-to) | 1755-1757 |
| Number of pages | 3 |
| Journal | Optics Letters |
| Volume | 26 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 15 Nov 2001 |
Bibliographical note
Funding: This work was carried out with the support of a UK Engineering and Physical Sciences Research Council research grant.Fingerprint
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