US4468090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibre optical arrangement for the transmission, in a manner preserving its polarization, of light of a defined, linear polarization state
Assignee: Individual
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Filing: 1981-07-20
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Granted: 1984-08-28
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Expires: 2001-07-20
Abstract
Abstract A fiber optical arrangement for the transmission, in a manner preserving its polarization, of light of a linear polarization state using an optical fiber having a linear birefringence of an amount sufficient to provide extensive decoupling of the polarization-degenerate modes of oscillation of the light that can propagate within the fiber. The amount of linear birefringence β required for decoupling these modes of oscillation is achieved by winding the optical fiber in an elastically extended condition upon a winding form and fixing it thereon in this elastically extended state, the linear birefringence β=β tc +β b being preferably three times greater than the intrinsic birefringence β i of the optical fiber. The fiber optical arrangement may be used within an interferometer for measuring pressures or, if mounted to rotate, within a Sagnac interferometer also for the exact measurement of rotations and rates of angular displacements.
Inventors
- 👤 Reinhard Ulrich
- 👤 Scott Rashleigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:13
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/25; G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/72; G01C19/721; G01L; G01L11/00; G01L11/02; G01L11/025
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
A fiber optical arrangement for a transmission of light of a defined linear polarization state in such a manner so as to preserve a polarization of the light using a fiber optical waveguide having a linear birefringence of an amount sufficient to provide extensive decoupling of polarization-degenerate modes of oscillation of the light that can propagate within the fiber, characterized in that an amount of linear birefringence β necessary for decoupling the polarization-degenerate modes of oscillation is achieved by a winding of an optical fiber in an elastically extended condition upon a winding form and fixing the optical fiber on the winding form in the elastically extended condition.
Claim 2
Dependent Claim
108 words
A fiber optical arrangement for a transmission of light of a defined linear polarization state in such a manner so as to preserve a polarization of the light using a fiber optical waveguide having a linear birefringence of an amount sufficient to provide extensive decoupling of polarization-degenerate modes of oscillation of the light that can propagate within the fiber, characterized in that an amount of linear birefringence β necessary for decoupling the polarization-degenerate modes of oscillation is achieved by a winding of an optical fiber in an elastically extended condition upon a winding form and fixing the optical fiber on the winding form in the elastically extended condition.
Claim 3
Dependent Claim
91 words
A fiber optical arrangement in accordance with claim 1, characterized in that the amount of linear birefringence β=β tc +β b achieved by the elastic extension and a spiral winding of the optical fiber is at least three times greater than an intrinsic birefringence β i of the optical fiber, wherein: β tc =a portion of the birefringence resulting from a combined effect of a curvature of the optical fiber and axial extension thereof, and β b =a portion of the birefringence resulting only from the curvature of the optical fiber.
Claim 4
Dependent Claim
43 words
A fiber optical arrangement in accordance with one of claims 1 or 2, characterized in that individual turns of the optical fiber having a winding plane normal to a winding axis are laid and retained upon the winding form in an undulated shape.
Claim 5
Dependent Claim
49 words
A fiber optical arrangement for the polarization-preserving transmission of light in accordance with one of claims 1 or 2, characterized in that the arrangement is mounted for rotation and marks within a Sagnac interferometer a light path closed through a main beam splitter and a beam recombination unit, respectively.
Claim 6
Dependent Claim
50 words
A fiber optical arrangement for a polarization-preserving transmission of light in accordance with claim 1, for use in pressure-measuring applications, characterized in that an arrangement of preferably small winding diameters is provided in at least one arm of a fiber optical interferometer for exposure to a pressure to be measured.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |