Identification apparatus of optical cable and identification method
First Claim
1. An optical cable identification apparatus for identifying an optical cable by disturbing an optical fiber, existing inside an optical cable desired to be identified, from outside the optical cable, the optical cable identification apparatus comprising:
- an optical unit for transmitting two optical signals to a single strand of optical fiber inside the optical cable, and detecting a phase difference, a time difference, and light intensity between two optical signals which are reflected due to the disturbance from the outside;
a single-fiber ending unit for generating the time difference;
a signal processing unit for removing noise from the two reflected optical signals and demodulating the optical signals; and
a sound output unit for outputting the optical signals from the signal processing unit as sounds.
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Accused Products
Abstract
An optical cable identification apparatus for identifying an optical cable by disturbing an optical fiber, existing inside an optical cable desired to be identified, from outside the optical cable. An optical unit transmits two optical signals to a single strand of optical fiber inside the optical cable, and detects a phase difference, a time difference, and light intensity between two optical signals which are reflected due to the disturbance from the outside. A single-fiber ending unit generates the time difference. A signal processing unit removes noise from the two reflected optical signals and demodulates the optical signals. A sound output unit outputs the optical signals from the signal processing unit as sounds.
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Citations
13 Claims
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1. An optical cable identification apparatus for identifying an optical cable by disturbing an optical fiber, existing inside an optical cable desired to be identified, from outside the optical cable, the optical cable identification apparatus comprising:
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an optical unit for transmitting two optical signals to a single strand of optical fiber inside the optical cable, and detecting a phase difference, a time difference, and light intensity between two optical signals which are reflected due to the disturbance from the outside; a single-fiber ending unit for generating the time difference; a signal processing unit for removing noise from the two reflected optical signals and demodulating the optical signals; and a sound output unit for outputting the optical signals from the signal processing unit as sounds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of identifying an optical cable by disturbing an optical fiber, existing inside an optical cable desired to be identified, from outside the optical cable, the optical cable identification method comprising the steps of:
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connecting a second optical coupler of a single-fiber ending unit to a single strand of optical fiber of the optical cable desired to be identified; a light source generator of an optical unit transmitting two optical signals to the single strand of optical fiber; a vibration application unit or an operator at a worksite generating pressure sounds by disturbing the optical cable, desired to be identified, from the outside; the optical unit detecting a phase difference, a time difference, and light intensity of two optical signals reflected due to the disturbance from the outside; a signal processing unit demodulating the detected optical signals; converting the optical signals of the signal processing unit into respective sound signals, and transmitting the sound signals to a second communication device of the operator at a remote location through a first communication device in a telephone station; and repeating a process of disturbing the optical cable from the outside if a sound of the first communication device is not identical to a sound of the second communication device. - View Dependent Claims (12, 13)
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Specification