Optical waveguides – Polarization without modulation
Patent
1995-06-07
1998-08-04
Bovernick, Rodney B.
Optical waveguides
Polarization without modulation
385 27, 385 24, 359341, 359349, H01S 300
Patent
active
057907218
ABSTRACT:
A fiber-optic amplifier with reduced noise characteristics is provided. A polarization beam splitter/recombiner splits an input signal beam into two orthogonally polarized optical signals and recombines the separately treated signals. A phase controller compensates for optical path differences that result from dividing the input signal beam into two different paths. A wavelength division multiplexing coupler couples a pump laser beam with the input signal beam. A polarization maintained doped optical fiber amplifies the split optical signals while maintaining their original states of polarization. A linear polarizer rejects from each amplified split optical signal the noise with polarization orthogonal to the amplified signal. By suppressing such noise power, a portion of amplified spontaneous emission with polarization orthogonal to the signal is suppressed, thereby reducing the total output noise power.
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patent: 5400164 (1995-03-01), Kurtzke et al.
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Bovernick Rodney B.
Samsung Electronics Co,. Ltd.
Song Yisun
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