Light receiving element module

H - Electricity – 01 – L

Patent

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Details

H01L 31/0232 (2006.01) G02B 6/42 (2006.01)

Patent

CA 2492785

A light receiving element module (3) according to the present invention includes a stem (10) where signal pins (40) (signal pins, voltage supplying pins) penetrate; a base (11) which is fixed in a direction perpendicular to the stem (10); a cap member (13) which has a light passing-through hole and is fixed to the stem (11); a spherical lens (12) which is inserted into the light passing-through hole and condenses signal light emitted from the optical fiber (20); a parabolic mirror (16) which is arranged on the base (11) and reflects the signal light condensed by the spherical lens at an approximately right angle; a light receiving element (18) which is arranged on the base and receives the signal light reflected by the parabolic mirror (16) to convert the signal light to an electric signal; and a trans-impedance amplifier (19) which is arranged on the base in proximity to the light receiving element (18) and amplifies the electric signal converted by the light receiving element (18).

Un module (3) de dispositif photorécepteur comprend une tige (10) traversée par des broches de signaux (40) (broche de signaux de commande, broche d'alimentation en tension) ; un socle (11) fixé verticalement à la tige (10) ; une enveloppe (13) fixée à la tige (10) et dotée d'un orifice de passage de lumière ; une lentille sphérique (12) introduite dans le trou de passage de lumière et qui condense le signal lumineux émis par une fibre optique (20) ; un miroir parabolique (16) placé sur le socle (11) et qui réfléchit le signal lumineux condensé par la lentille sphérique (12) par réfraction généralement à angle droit ; un dispositif photorécepteur (18) placé sur le socle (11) et qui reçoit et convertit en signaux électriques le signal lumineux réfléchi par le miroir parabolique (16) ; et enfin, un amplificateur d'adaptation d'impédance (19) placé sur le socle (11), à proximité du dispositif photorécepteur, et qui amplifie les signaux électriques convertis par le dispositif photorécepteur (18).

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