Field-assisted fiber spinning for the preparation of optical fibers having non-linear optical activity
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United States of America Patent
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Apr 17, 1990
Grant Date -
N/A
app pub date -
Sep 18, 1987
filing date -
Sep 18, 1987
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Abstract
A method for the preparation of polymer-based optical fibers with nonlinear optical activity using a field-assisted fiber spinning technique has been developed. A homogeneous mixture of high-glass-transition-temperature polymer and a rigid-rodlike noncentrosymmetric molecule with nonlinear optical activity is employed in a specialized fiber-spinning operation. Equivalently, the noncentrosymmetric moieties can be chemically attached to the polymer backbone. A special spinneret is designed in such a manner as to allow a strong electric or magnetic field to be externally applied in the die (extrudate) swell region prior to fiber draw-down. In the die swell region, the imposed electric or magnetic field imparts a preferential orientation to the rod-like molecules (segments), where the molecular dipoles acquire an anistropic spatial orientational accentuated and trapped in fiber draw-down, where the mixture cools and vitrifies. Hence, the final product is nonlinearly-active polymer optical fibers doped with non-centrosymmetric rod-like molecules (segments) whose molecular axis is aligned with the fiber axis. In addition, the alignment is such that the net dipole moment of the system as a whole is non-zero due to the strong electromagnetic field imposed prior to fiber draw-down. This invention is useful in a wide variety of electro-optic and opto-electronic applications.
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- 15 United States
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Patent Owner(s)
- SOANE TECHNOLOGIES, INC.;FINLEY, HUGH D.;PETERS, HOWARD M.
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Soane, David S | 22 Arbor Dr., Piedmont, CA 94610 | 243 | 7401 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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