Photodetector module for coupling with optical fiber

Details Photodetector module for coupling with optical fiber Photodetector module for coupling with optical fiber

1990-07-18

1991-11-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

385 49, H01J 516

Patent

active

050650114

ABSTRACT:
A photodetector module comprising an optical fiber and a photodetector which are coupled by direct optical coupling is disclosed. A photodetector chip is fixedly attached to the circular top surface, having the shape of a circle circumscribed around the photodetector chip, of a carrier having the shape of a frustum of a circular cone, or the photodetector chip is fixedly attached to the circular bottom surface, having the shape of a circle circumscribed around the photodetector chip, of a circular recess formed in the bottom of a taper recess formed in the carrier and having the shape of a frustum of a circular cone. Such a combination of the photodetector chip and the carrier enables the omission of the positional adjustments of the photodetector chip on the carrier with respect to the X-axis and the Y-axis. A ferrule having a flange and a ferrule support member having a taper surface fitting the taper surface of the carrier are employed to omit the positional adjustment of the photodetector chip with respect to the Z-axis. Thus, the photodetector module can be assembled without requiring the positional adjustments of the photodetector chip relative to the optical fiber.

REFERENCES:
patent: 4479696 (1984-10-01), Lubin et al.
patent: 4658130 (1987-04-01), Durbin

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