Raman-active optical fiber
AssigneeAlcatel
InventorsEkaterina Bourova, Stephanie Blanchandin, Jérome Garapon
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Abstract
An optical fiber has a fiber core with a higher refractive index and a cladding surrounding the core with a lower refractive index. The fiber core is made of a multi-component oxide glass composition which consists of a glass-forming component and two Raman-active components. The glass former is SiO2 and the Raman active components are of Li2O and Nb2O5. The concentration of the glass former is between 30 and 90 mol % and of the Raman active components is up to 50 mol % in total. The composition may further include a glass-modifying component of alkaline such as Li2O, Na2O, K2O, Rb2O, Cs2O or earth-alkaline such as BeO, MgO, CaO, SrO, BaO in a concentration of up to 40 mol %.
Claims13
A Raman-active optical fiber having a core with a higher refractive index and a cladding with a lower refractive index, said core comprising a multi-component oxide glass composition comprising:
- a glass former component made of SiO2 having a concentration of between 30 and 90 mol %;
- and
- two Raman-active components of Li2O and Nb2O5 in a concentration of up to 50 mol % in total;
- wherein said Raman-active optical fiber has areas comprising LiNbO3 crystallization particles induced by heat treatment of the fiber.
A Raman amplifier or laser, comprising a pump source coupled to a Raman-active optical fiber,
- said Raman-active optical fiber having a core with a higher refractive index and a cladding with a lower refractive index, and
- said core comprising a multi-component oxide glass composition comprising:
- a glass former component made of SiO2 having a concentration of between 30 and 90 mol %;
- and
- two Raman-active components of Li2O and Nb2O5 in a concentration of up to 50 mol % in total.
Dependencies are inferred from the claim text.