At 100 Gbps, a bit takes 10-¹1 sec to be transmitted. With the speed of light being 2 x 108 meters/sec, in 1 bit time, the light pulse achieves a length of 2 mm or 2000 microns. Since a photon is about 1 micron in length, the pulse is 2000 photons long. Thus, we are nowhere near one photon per bit even at 100 Gbps. Only at 200 Tbps do we achieve 1 bit per photon.
At 100 Gbps, a bit takes 10-¹1 sec to be transmitted. With the speed of light being 2 x 108 meters/sec, in 1 bit time, the light pulse achieves a length of 2 mm or 2000 microns. Since a photon is about 1 micron in length, the pulse is 2000 photons long. Thus, we are nowhere near one photon per bit even at 100 Gbps. Only at 200 Tbps do we achieve 1 bit per photon.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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![At 100 Gbps, a bit takes 10-¹1 sec to be transmitted. With the speed of light
being 2 x 108 meters/sec, in 1 bit time, the light pulse achieves a length of 2
mm or 2000 microns. Since a photon is about 1 micron in length, the pulse is
2000 photons long. Thus, we are nowhere near one photon per bit even at
100 Gbps. Only at 200 Tbps do we achieve 1 bit per photon.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc46d33fd-0f98-4a63-9d34-7b9f810bca8d%2F3b51cd22-6b74-4374-bc94-3745b8bf45ca%2F91y69ds_processed.jpeg&w=3840&q=75)
Transcribed Image Text:At 100 Gbps, a bit takes 10-¹1 sec to be transmitted. With the speed of light
being 2 x 108 meters/sec, in 1 bit time, the light pulse achieves a length of 2
mm or 2000 microns. Since a photon is about 1 micron in length, the pulse is
2000 photons long. Thus, we are nowhere near one photon per bit even at
100 Gbps. Only at 200 Tbps do we achieve 1 bit per photon.
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