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Resolution upgrade toward 6-bit optical quantization using power-to-wavelength conversion for photonic
Optics Letters
|December 11, 2013
Summary
This study introduces a 6-bit optical quantization method using power-to-wavelength conversion. This technique enhances resolution without increasing system parallelism, achieving high effective bits for optical signal processing.
Area of Science:
- Photonics and Optical Engineering
- Signal Processing
- Metrology
Background:
- Optical quantization is crucial for high-speed signal processing.
- Existing methods often require increased system parallelism for higher resolution.
- Limitations in effective bits and linearity hinder practical applications.
Purpose of the Study:
- To achieve 6-bit optical quantization resolution.
- To improve optical analog-to-digital conversion (OADC) performance.
- To demonstrate a novel power-to-wavelength conversion technique.
Main Methods:
- Utilizing a power-to-wavelength conversion technique.
- Expanding the full-scale input range.
- Reducing the quantization step size while maintaining sampling rate transparency.
- Operating at sampling rates of several hundred giga-samples per second (GS/s).
Main Results:
- Achieved a resolution upgrade towards 6-bit optical quantization.
- Estimated effective number of bits (ENOB) of 5.74 bits.
- Integral nonlinearity (INL) and differential nonlinearity (DNL) errors below 1 least significant bit (LSB).
Conclusions:
- The proposed method successfully enhances optical quantization resolution.
- Power-to-wavelength conversion offers a viable path for high-resolution OADCs.
- The technique avoids increased system parallelism, simplifying hardware.
