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3-λ characterization of phase response for optical receivers
Optics Letters
|February 4, 2014
Summary
A new digital signal processing (DSP) algorithm enables efficient photodiode characterization. This method achieves unprecedented phase response characterization up to 20 GHz with minimal measurements.
Area of Science:
- Electrical Engineering
- Optical Engineering
- Signal Processing
Background:
- Photodiodes are critical optoelectronic components.
- Accurate characterization, especially phase response, is essential for high-frequency applications.
- Existing methods may lack efficiency or high-frequency capability.
Purpose of the Study:
- To introduce a novel digital signal processing (DSP) algorithm for photodiode characterization.
- To achieve efficient and accurate measurement of photodiode phase response.
- To extend the characterization frequency range of photodiodes.
Main Methods:
- Development of a low computational complexity DSP algorithm.
- Utilizing three wavelengths for probing photodiode response.
- Logarithmic scaling of measurements with spectral points for efficiency.
Main Results:
- Successful characterization of photodiode phase response up to 20 GHz.
- Demonstration of low computational complexity for the DSP algorithm.
- Efficient measurement acquisition due to logarithmic increase in data points.
Conclusions:
- The proposed DSP algorithm offers a significant advancement in photodiode characterization.
- This technique enables high-frequency phase response analysis for the first time.
- The algorithm's efficiency makes it suitable for practical applications.
