Coherent light generators – Optical fiber laser
Patent
1996-12-19
1999-07-06
Bovernick, Rodney
Coherent light generators
Optical fiber laser
372102, H01S 330
Patent
active
059205822
ABSTRACT:
An active optical fiber for use in an amplifier or laser has an inner cladding and an outer cladding. An index grating is written into the inner cladding to provide coupling between cladding modes of pumping radiation conducted in the inner cladding. The periodicity of the index grating is selected to couple energy from cladding modes having minimal overlap with the core to cladding modes having relatively high overlap. The efficiency of pumping the radiation amplifying medium of the core is thereby improved. The fibre has utility in transmitters for broad band networks.
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Bovernick Rodney
Crane John D.
Northern Telecom Limited
Wise Robert E.
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