EP 1038338 A1 20000927 - DOUBLE-CLAD RARE EARTH DOPED OPTICAL FIBERS
Title (en)
DOUBLE-CLAD RARE EARTH DOPED OPTICAL FIBERS
Title (de)
DOPPELT UMMANTELTE, MIT SELTENEN ERDEN DOTIERTE OPTISCHE FASER
Title (fr)
FIBRES OPTIQUES DOPEES AUX TERRES RARES A DOUBLE GAINAGE
Publication
Application
Priority
- US 9825943 W 19981207
- US 98786297 A 19971209
Abstract (en)
[origin: WO9930391A1] An optical fiber (10) made with a central core (12), a first cladding layer (16), and a second cladding layer (18) having a series of perturbations or irregularities formed into the otherwise generally circular outer boundary of the first cladding layer. The irregularities in the first cladding layer interrupt the propagation of skew rays and encourage coupling into the core. The irregularities are formed by drilling holes (44-58) in the fiber preform, which are parallel with its longitudinal axis, and inserting rods therein. An intermediate cladding layer (14) is provided for suppressing higher order core modes. The optical fibers are used in cladding pumped fiber lasers and amplifiers.
IPC 1-7
IPC 8 full level
G02B 6/036 (2006.01); G02B 6/10 (2006.01); H01S 3/067 (2006.01)
CPC (source: EP)
G02B 6/03622 (2013.01); G02B 6/03638 (2013.01); G02B 6/03694 (2013.01); G02B 6/105 (2013.01); H01S 3/06708 (2013.01)
Citation (search report)
See references of WO 9930391A1
Designated contracting state (EPC)
DE ES GB
DOCDB simple family (publication)
WO 9930391 A1 19990617; BR 9813450 A 20010828; DE 1038338 T1 20010208; EP 1038338 A1 20000927; ES 2154251 T1 20010401
DOCDB simple family (application)
US 9825943 W 19981207; BR 9813450 A 19981207; DE 98960794 T 19981207; EP 98960794 A 19981207; ES 98960794 T 19981207