Optical waveguides – Polarization without modulation
Reexamination Certificate
2008-07-08
2008-07-08
Sanghavi, Hemang (Department: 2874)
Optical waveguides
Polarization without modulation
C385S005000, C385S027000, C385S122000
Reexamination Certificate
active
07397975
ABSTRACT:
Reflection means such as a mirror are provided on the output end of an optical fiber, and the input signal light and control light are returned to the optical fiber. Although the zero-dispersion wavelength of the optical fiber fluctuates in the longitudinal direction, if the length is relatively short, it is possible to manufacture a high yield of optical fibers, which monotonically changes the zero-dispersion wavelength. Therefore, a relatively short optical fiber with a monotonic zero-dispersion change can be used. Since the zero-dispersion change is monotonic and the optical fiber is short, the amount of change in the zero-dispersion wavelength is small and the bandwidth becomes broader when the control light is set at the position of the average zero-dispersion wavelength. Additionally, although the length of the optical fiber is short, the operating length is twice as long and thus the generation efficiency does not degrade.
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Futami Fumio
Okabe Ryou
Ono Shunsuke
Watanabe Shigeki
Fujitsu Limited
Sanghavi Hemang
Staas & Halsey , LLP
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