Low-transmission-loss prism for optical switches designed by means of optical-power-evaluation computer program

Takahiro Takigawa; Hideyuki Tanaka; Yasukazu Sano

doi:10.1117/12.219516

15 September 1995 Low-transmission-loss prism for optical switches designed by means of optical-power-evaluation computer program

Takahiro Takigawa, Hideyuki Tanaka, Yasukazu Sano

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Proceedings Volume 2540, Current Developments in Optical Design and Engineering V; (1995) https://doi.org/10.1117/12.219516
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

We have developed a low transmission loss prism for optical switches suitable for optical fiber systems which monitor and control factory equipment. We have realized the low transmission loss prism by using the geometrical property of ellipsoids and a newly developed optical power evaluation computer program which facilitates estimating the coupling efficiency between two optical fibers considering total reflection phenomena, numerical aperture and far field pattern of the optical fiber for an aspherical optical system. The transmission loss of the present ellipsoidal prism is 5 dB for the plastic fiber with the core diameter of 1 mm, and 5.8 dB for polymer clad fiber with core diameter of 0.2 mm. The present ellipsoidal prism improves transmission loss by 4 dB as compared with the conventional spherical prism for the optical fibers usually adopted to the optical fiber systems. The calculated loss and experimental loss agreed well. This agreement confirms the usefulness of our computer program.

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Takahiro Takigawa, Hideyuki Tanaka, and Yasukazu Sano "Low-transmission-loss prism for optical switches designed by means of optical-power-evaluation computer program", Proc. SPIE 2540, Current Developments in Optical Design and Engineering V, (15 September 1995); https://doi.org/10.1117/12.219516

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KEYWORDS

Optical fibers

Prisms

Optical switching

Software

Phase only filters

Reflection

Spherical lenses

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