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1. WO2008004218 - APPAREIL OPTIQUE COMPRENANT UNE FIBRE DE GUIDAGE DE LUMIÈRE DE POMPAPE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS
What is claimed is:
1. Optical apparatus comprising:
a pump-guiding fiber (30) comprising a fiber cladding (31), a fiber core (32) and an attachment section (33), said attachment section (33) comprising a straight core section (34) and a tapered core section (35), said pump-guiding fiber (30) being optically attached at one end thereof to a pump source (29) and an opposite end of said pump-guiding fiber (30) being attached to an inner clad (42) of a receiving fiber (40) through an attachment section (50), said attachment section (50) comprising both said straight core section (34) and said tapered core section (35) of said pump-guiding fiber (30),
characterized in that both said straight core section (34) and said tapered core section (35) of said pump-guiding fiber (30) are attached to said receiving fiber (40) with an intermediate sol-gel material (51).
2. The optical apparatus according to claim 1, wherein said intermediate sol-gel material (51) achieves good mechanical adhesion and good optical contact between said pump-guiding fiber (30) and said receiving fiber's inner clad (42).
3. The optical apparatus according to claim 1, wherein a refractive index of said intermediate sol-gel material (51) is closely identical to that of said pump-guiding fiber (30) and said receiving fiber (40).
4. The optical apparatus according to claim 1 , wherein said apparatus is coated with a low index optical material whose refractive index is lower than 1.4.
5. The optical apparatus according to claim 1, wherein said intermediate sol-gel material (51) comprises a fast sol-gel.
6. The optical apparatus according to claim 1, wherein said intermediate sol-gel material (51) comprises a sol-gel-derived intermediate material (51) capable of being fabricated into a thin film.
7. The optical apparatus according to claim 1, wherein a leaky guiding mode couples said pump-guiding fiber (30) to said receiving fiber (40) through said intermediate sol-gel material (51).
8. The optical apparatus according to claim 1, wherein said attachment section (33) is twisted around said inner clad (42), and before twisting, said pump-guiding fiber (30) and said receiving fiber (40) are immersed in said intermediate sol-gel material (36).