Method and apparatus for the characterization of optical pulses and modulators
AssigneeLucent Technologies Inc.
InventorsChristophe Jean Dorrer, Inuk Kang
Life of this patent
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Abstract
A method and apparatus for the characterization of optical pulses and modulators includes modulating, using a modulator, a train of optical pulses, measuring a spectrum of the modulated train of optical pulses, recording the measured spectrum as an entry in a spectrogram at a position in the spectrogram corresponding to a relative delay between the modulation and the train of optical pulses, incrementing the relative delay, and repeating the above steps until the accumulated relative delay is equal to the period of the spectrogram. The train of optical pulses and the modulator are then characterized using the measured spectra recorded in the spectrogram.
Claims40
A method, comprising:
- a) modulating, using a modulator, a train of optical pulses;
- b) measuring a spectrum of said modulated train of optical pulses;
- c) recording said measured spectrum as an entry in a spectrogram at a position in said spectrogram corresponding to a relative delay between said modulation and said train of optical pulses;
- d) incrementing said relative delay;
- e) repeating steps (a), (b), (c), and (d) until the accumulated relative delay is equal to the period of said spectrogram;
- and
- f) characterizing said train of optical pulses and said modulator using said measured spectra recorded in said spectrogram.
An apparatus for characterizing a train of optical pulses and a modulator, comprising:
- said modulator, for modulating said train of optical pulses;
- a drive unit, for controlling the modulation of said modulator;
- a detector, for measuring a spectrum of said train of optical pulses;
- a delay unit, for incrementing a relative delay between said modulation and said train of optical pulses;
- and
- a characterization control unit comprising a memory, for storing a spectrogram and program instructions, and a processor for executing said instructions to configure the apparatus to perform the steps of:
- a) modulating, using said modulator, said train of optical pulses;
- b) measuring a spectrum of said modulated train of optical pulses;
- c) recording said measured spectrum as an entry in said spectrogram at a position in said spectrogram corresponding to a relative delay between said modulation and said train of optical pulses;
- d) incrementing said relative delay;
- e) repeating steps (a), (b), (c), and (d) until the accumulated relative delay is equal to the period of said spectrogram;
- and
- f) characterizing said train of optical pulses and said modulator using said measured spectra recorded in said spectrogram.
An apparatus for characterizing a modulator and a train of optical pulses, wherein said train of optical pulses is modulated by said modulator, comprising:
- an optical pulse source, for providing said train of optical pulses to said modulator;
- a drive unit, for controlling the modulation of said modulator;
- a detector, for measuring a spectrum of said train of optical pulses;
- a delay unit, for incrementing a relative delay between said modulation and said train of optical pulses;
- and
- a characterization control unit comprising a memory for storing a spectrogram and program instructions and a processor for executing said instructions to configure the apparatus to perform the steps of:
- a) modulating, using a said modulator, said train of optical pulses;
- b) measuring a spectrum of said modulated train of optical pulses;
- c) recording said measured spectrum as an entry in said spectrogram at a position in said spectrogram corresponding to a relative delay between said modulation and said train of optical pulses;
- d) incrementing said relative delay;
- e) repeating steps (a), (b), (c), and (d) until the accumulated relative delay is equal to the period of said spectrogram;
- and
- f) characterizing said train of optical pulses and said modulator using said measured spectra recorded in said spectrogram.
Dependencies are inferred from the claim text.