Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2007-04-24
2007-04-24
Pak, Sung (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C385S031000, C385S049000, C385S088000, C385S092000
Reexamination Certificate
active
10521112
ABSTRACT:
A light receiving element module includes a stem which signal pins penetrate; a base which is fixed in a direction perpendicular to the stem; a cap member which has a light passing-through hole and is fixed to the stem; a spherical lens which is inserted into the light passing-through hole and condenses signal light emitted from the optical fiber; a parabolic mirror which is arranged on the base and reflects the signal light condensed by the spherical lens at approximately a right angle; a light detecting element which is arranged on the base and detects the signal light reflected by the parabolic mirror and converts the signal light into an electrical signal; and a trans-impedance amplifier which is arranged on the base in proximity to the light detecting element and amplifies the electrical signal produced by the light detecting element.
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Kubota, Hiroshi; “Applied Optics”, (Dec. 19, 1959).
Leydig , Voit & Mayer, Ltd.
Mitsubishi Denki & Kabushiki Kaisha
Pak Sung
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