Optical: systems and elements – Holographic system or element – Having particular recording medium
Patent
1995-10-03
1998-01-27
Dzierzynski, Paul M.
Optical: systems and elements
Holographic system or element
Having particular recording medium
359 34, 359569, 359341, 385 37, H01S 300, G02B 518
Patent
active
057127158
ABSTRACT:
An optical transmission system having a transmission waveguide, an optical amplifier, a pump radiation source for supplying pump radiation to the optical amplifier, and a Bragg grating for reflecting pump radiation to the amplifier. The Bragg grating is produced using two collimated, non-collinear beams of actinic radiation to form an interference pattern in a medium. While changing the product .lambda..times.0.5 csc .phi./2, the interference pattern is advanced relative to the medium such that the interference pattern has a spatially varying period. The resulting Bragg grating has a sufficiently wide bandwidth in reflection, sufficiently high extinction in transmission, and sufficiently low intrinsic loss that the pump radiation source may be located at least one kilometer from the optical amplifier.
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Erdogan Turan
Mizrahi Victor
Books, Esq. Glen E.
Dzierzynski Paul M.
Jr. John Juba
Lucent Technologies - Inc.
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