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US 7,411,683 B2Granted
Electric field measurement of optical waveforms
AssigneeLucent Technologies Inc.
InventorChristophe Dorrer
Life of this patent
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Abstract
Time magnification and heterodyning are combined to allow the single-shot characterization of the electric field of optical waveforms. The electric field of the source under test is obtained by Fourier processing of the magnified temporal intensity of the source heterodyned with a monochromatic source. An experimental implementation of this technique is characterized and used to measure various optical signals.
Claims20
A method for determining the electric field of a source under test, said method comprising the steps of:
- combining the source under test with a co-polarized monochromatic optical signal having an optical frequency outside the spectral support of the source under test signal to obtain a combined signal;
- generating a modulated signal having the intensity of the combined sources and a time-varying instantaneous frequency;
- stretching, the modulated signal into a stretched signal through the effect of chromatic dispersion;
- measuring the intensity of the stretched signal;
- and
- determining, the electric field characteristics of the source under test signal.
3 more elements
An electric field measurement apparatus comprising:
- a source under test for which the electric field is determined;
- a monochromatic source;
- a modulation device, for modulating the combination of the output of the source under test and the monochromatic source, producing a modulated signal;
- a dispersive element, for producing a stretched pulse from the modulated signal;
- and
- a detector, for measuring the intensity of the stretched pulse.
3 more elements
Dependencies are inferred from the claim text.