Optical time domain reflectometer having shortened dead zone
A driver circuit 2 generates a pulse current on the basis of an electrical pulse outputted from a timing generating portion 1. A light source 3 emits a light pulse according to the pulse current. The light pulse outputted from the light source 3 goes to a delay optical fiber 9 through an optical wav...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
18.04.1995
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Summary: | A driver circuit 2 generates a pulse current on the basis of an electrical pulse outputted from a timing generating portion 1. A light source 3 emits a light pulse according to the pulse current. The light pulse outputted from the light source 3 goes to a delay optical fiber 9 through an optical waveguide directional coupler 4, and then goes to a measuring optical fiber 10. A delay circuit 11 delays a digital operation of a digital operating portion 7, by a time required for said light pulse to go back and forth in the delay optical fiber 9. |
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Bibliography: | Application Number: US19930174050 |