Pumping method and unit for optical amplifiers
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United States of America Patent
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Nov 4, 2003
Grant Date -
Nov 7, 2002
app pub date -
Dec 20, 2001
filing date -
Dec 27, 2000
priority date (Note) -
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Abstract
Optical pumping unit comprising a first pump source adapted to emit a first pump radiation at wavelength .lambda.p1; a second pump source adapted to emit a second pump radiation at wavelength .lambda.p2, with wavelength .lambda.p2 different from wavelength .lambda.p1; and a common coupling section comprising a first and a second port connected to the first and second pump source for respectively receiving the first and the second pump radiation; a third port for a signal radiation at wavelength .lambda.s; a fourth port, wherein the coupling section is adapted to combine, in the fourth port, the signal radiation and the first and second pump radiation through a reversal of the direction of propagation of the first pump radiation from the first port to the fourth port.
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