Optical coupling circuit element

Details Optical coupling circuit element Optical coupling circuit element

1989-12-01

1991-07-16

Ullah, Akm

350452, G02B 632

Patent

active

050319914

ABSTRACT:
An optical coupling circuit element providing one transparent substrate, a first micro Fresnel lens formed on one side surface of said substrate, and a second micro Fresnel lens formed on the other side surface of said substrate, so that coherent light incident into said first micro Fresnel lens is projected, through said transparent substrate, on said second micro Fresnel lens to be left therefrom as a collimating beams, which is useful for directing light emitted from coherent source such as semi-conductor laser to optical communication means such as optical fiber for condensation.

REFERENCES:
patent: 3761184 (1973-09-01), McLaughlin
patent: 4671625 (1987-06-01), Noble
patent: 4832464 (1989-05-01), Kato et al.
Nishihara et al., "Holocoupler: A Novel Coupler for Optic Circuits", in IEEE Journal of Quantum Electronics, Sep. 1975, pp. 794-796.

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