Optical property determination using differences in signal responses to applied modulated laser signals
First Claim
1. A system for determining a characteristic of an optical property of a device under test—
- DUT—
, wherein the optical property is at least one of a group comprising chromatic dispersion and group delay, the system comprising;
a signal evaluation unit adapted for receiving response signals of the DUT on an applied first laser signal at a first center wavelength modulated by a first modulation frequency and an applied second laser signal at a second center wavelength modulated by a second modulation frequency, and for determining the characteristic of the optical property of the DUT based on an analysis of the received response signals in conjunction with the parameter settings for the first center wavelength, the first modulation frequency, the second center wavelength, and the second modulation frequency.
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Abstract
A characteristic of an optical property of a device under test—DUT—is determined by providing to the DUT a first laser signal at a first center wavelength, modulated by a first modulation frequency, and a second laser signal at a second center wavelength, modulated by a second modulation frequency. Response signals from the DUT on the applied first and second laser signals are received. The characteristic of the optical property of the DUT is then determined based on an analysis of the received response signals for different measurement setups of parameter settings for the first center wavelength, the first modulation frequency, the second center wavelength, and the second modulation frequency, in conjunction with the parameter settings for each measurement setup.
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Citations
12 Claims
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1. A system for determining a characteristic of an optical property of a device under test—
- DUT—
, wherein the optical property is at least one of a group comprising chromatic dispersion and group delay, the system comprising;
a signal evaluation unit adapted for receiving response signals of the DUT on an applied first laser signal at a first center wavelength modulated by a first modulation frequency and an applied second laser signal at a second center wavelength modulated by a second modulation frequency, and for determining the characteristic of the optical property of the DUT based on an analysis of the received response signals in conjunction with the parameter settings for the first center wavelength, the first modulation frequency, the second center wavelength, and the second modulation frequency. - View Dependent Claims (2, 3, 4, 5, 6)
- DUT—
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7. A method for determining a characteristic of an optical property of a device under test—
- DUT—
, wherein the optical property is at least one of a group comprising chromatic dispersion and group delay, the method comprising the steps of;
(a) receiving response signals from the DUT on an applied first laser signal at a first center wavelength modulated by a first modulation frequency and an applied second laser signal at a second center wavelength modulated by a second modulation frequency, and (b) determining the characteristic of the optical property of the DUT by analyzing the received response signals in conjunction with the parameter settings for the first center wavelength, the first modulation frequency, the second center wavelength, and the second modulation frequency. - View Dependent Claims (8, 9, 10, 11, 12)
- DUT—
Specification