Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1994-09-27
1996-06-11
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359156, 359158, H04B 1004
Patent
active
055261620
ABSTRACT:
A method and apparatus is provided for modulating the polarization of an optical signal. A polarization modulator receives an optical signal onto which data has been modulated at a predetermined frequency. The polarization modulator modulates the state of polarization of the optical signal at a frequency phase locked and equal to the same predetermined frequency at which the data is modulated onto the optical signal. The polarization modulation is performed so that the average value of the state of polarization over each modulation cycle is substantially equal to zero.
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"Spectral and Polarization Hole Burning in Neodymium Glass Lasers", IEEE Journal of Quantum Electronics, D. W. Hall et al., vol. QE-19, No. 11, Nov. 1983, pp. 1704-1717.
Co-pending U.S. patent application Ser. No. 08/173,288, N. S. Bergano Case 10, filed Dec. 23, 1993, entitled "Dual-Wavelength Data Transmitter For Reducing Fading In An Optical Transmission System".
AT&T Corp.
Mayer Stuart H.
Pascal Leslie
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