Rca Inc.

Alexander W Lightstone

Paul P Webb

Robert J McIntyre

Fiber optic connectors typically have a light reflection occurring at the fiber to air interface. This reflection may be minimized by a connector having a supporting means with an opening therethrough, a pellicle and having first and second major surfaces wherein the first major surface is attached to the supporting means and extends over the opening and a low refection coating on the second major surface. The connector may be assembled by supporting the fiber and positioning the pellicle such that the end face of the fiber is adjacent the first major surface. The connector may also be assembled by forming the supporting means, forming the pellicle and attaching the pellicle to the supporting means such that the pellicle extends over the opening.

Optical fiber connector and method of assembling same

The invention is an improved avalanche photodiode having reduced electrical noise arising from spurious surface generation of charge carriers. The avalanche photodiode includes active and neighboring regions adjacent a first surface of a semiconductor body with a gap region therebetween and a channel extending a distance into the semiconductor body from a portion of the second opposed surface opposite the gap region. A P-N junction is formed between regions of opposite conductivity type including a portion thereof over the channel. Since the dopant concentration at the junction is less over the channel, the local avalanche gain over the channel is less, thereby reducing the noise contribution from carriers generated in the gap region.

Avalanche photodiode

An avalanche photodiode includes a region of second conductivity type extending a distance into a substrate and a region of first conductivity type extending a further distance into the substrate of first conductivity type with a P-N junction therebetween. The invention is a method for fabricating an avalanche photodiode having a specified breakdown voltage. The method includes the step of measuring the concentration of the first type conductivity modifiers and removing a portion of the surface of the substrate prior to forming the region of second conductivity type. This method provides control of the concentration of the first type conductivity modifiers at the P-N junction and thereby controls the breakdown voltage.

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CA

Alexander W Lightstone