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Optical clock repetition-rate multiplier for high-speed digital optical logic circuits
T Papakyriakopoulos1, K Vlachos, A Hatziefremidis
1Department of Electrical and Computer Engineering, National Technical University of Athens, 157 73 Zographou, Athens, Greece.
Optics Letters
|December 13, 2007
Summary
Researchers achieved repetition-rate multiplication using a fiber ring oscillator with a semiconductor optical amplifier. This method successfully multiplied optical pulse repetition frequencies up to six times, reaching 34.68 GHz.
Area of Science:
- Optics and Photonics
- Semiconductor Devices
Background:
- Fiber ring oscillators are key components in laser systems.
- Semiconductor optical amplifiers (SOAs) offer high gain and fast response times.
Purpose of the Study:
- To demonstrate repetition-rate multiplication in a fiber ring oscillator.
- To utilize the fast saturation and recovery dynamics of SOAs for frequency multiplication.
Main Methods:
- A fiber ring oscillator incorporating a semiconductor optical amplifier was designed.
- External optical pulse trains were used to drive the fast saturation and recovery of the SOA.
Main Results:
- Repetition-rate multiplication was successfully achieved.
- Multiplication factors of up to 6 times were demonstrated.
- A maximum output frequency of 34.68 GHz was reached.
Conclusions:
- Fiber ring oscillators with SOAs are effective for optical pulse repetition-rate multiplication.
- The fast gain dynamics of SOAs are crucial for achieving high-frequency multiplication.
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