Anamorphic microlens for coupling optical fibers to elliptical l

Details Anamorphic microlens for coupling optical fibers to elliptical l Anamorphic microlens for coupling optical fibers to elliptical l

1994-06-22

1995-10-03

Ullah, Akm E.

Optical waveguides

With optical coupler

Input/output coupler

385 15, G02B 600, G02B 632

Patent

active

054558794

ABSTRACT:
To couple the elliptical mode field light beam of a laser radiation source to a circularly symmetric single-mode optical fiber, the end of the fiber is provided with an anamorphic lens. The double wedge-shaped lens provides high coupling efficiency and is easily constructed. Other anamorphic lenses are also disclosed. A single wedge lens can provide high coupling efficiency if it is formed on the end of a coupling fiber which has a core that is elliptically-shaped in cross-section, the line of intersection of the two surfaces forming the lens being aligned with the major axis of the elliptical fiber core.

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"Efficient Power Coupling from a 980-nm Broad-Area Laser to a Single-Mode Fiber Using a Wedge-Shaped Fiber Endface" by Journal of Lightwave Tech. vol. 8, No. 9, Sep. 1990, pp. 1313-1318.
"Peaked Fiber Ends Result in Increased Coupling Efficiency" Laser Focus, Feb., 1982, p. 103.
Hunziker et al. "Elliptically Lensed Polarization Maintaining Fibers", Electronics Letters, 13th Aug. 1992, vol. 28, No. 17, pp. 1654-1656.

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