Diagnostic method and diagnostic chip for determining the bandwidth of optical fibers
First Claim
1. A method for determining the bandwidth of at least one optical fiber, comprising:
- coupling light with a first optical power and a first modulation frequency into the optical fiber, measuring a first signal level as a function of the optical power of the light of the first modulation frequency passing through the optical fiber, coupling light with a second optical power and a second modulation frequency into the optical fiber, measuring a second signal level as a function of the optical power of the light of the second modulation frequency passing through the optical fiber, and determining the bandwidth of the optical fiber as a function of the first and second optical power and/or the measured first and second signal level while using a predetermined specification that describes the frequency-dependent attenuation response of the optical fiber, characterized in that the first and second modulation frequencies have essentially the same value.
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Abstract
For a simple determination of the bandwidths of optical fibers, the invention proposes a method that provides for the coupling of light with a first optical power and a first modulation frequency into an optical fiber, as well as measuring a first signal level as a function of the optical power of the light of the first modulation frequency passing through the optical fiber, coupling light with the second optical power and a second modulation frequency into the optical fiber, measuring a second signal level as a function of the optical power of the light of the second modulation frequency passing through the optical fiber, and determining the bandwidths of the optical fibers as a function of the first and second coupled optical [power and/or] the measured first and second signal levels while using a predetermined specification that describes the frequency-dependent attenuation response of the optical fiber, wherein the first and the second modulation frequencies have essentially the same value. The invention further proposes a corresponding electronic component for performing the method, which is constructed, in particular, as an integrated circuit.
24 Citations
24 Claims
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1. A method for determining the bandwidth of at least one optical fiber, comprising:
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coupling light with a first optical power and a first modulation frequency into the optical fiber, measuring a first signal level as a function of the optical power of the light of the first modulation frequency passing through the optical fiber, coupling light with a second optical power and a second modulation frequency into the optical fiber, measuring a second signal level as a function of the optical power of the light of the second modulation frequency passing through the optical fiber, and determining the bandwidth of the optical fiber as a function of the first and second optical power and/or the measured first and second signal level while using a predetermined specification that describes the frequency-dependent attenuation response of the optical fiber, characterized in that the first and second modulation frequencies have essentially the same value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An electronic component for use in an optical data transmission path that has at least one optical fiber, comprising means for calculating a value for the bandwidth of an optical fiber as a function of a first and a second signal level while using an algorithm based on a predetermined specification where the specification describes the frequency-dependent attenuation response of the optical fiber, wherein the component is constructed for measuring the average optical power (AVG) of an optical signal and the amplitude of a modulated optical signal (OMA;
- Optical Modulated Amplitude).
Specification