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Ultrawideband monocycle generation using cross-phase modulation in a semiconductor optical amplifier.

Jianji Dong¹, Xinliang Zhang, Jing Xu

¹Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.

|April 19, 2007

Summary

This study introduces a new method for generating ultrawideband (UWB) monocycle pulses using a semiconductor optical amplifier (SOA) and cross-phase modulation (XPM). The technique successfully produces polarity-reversed UWB pulses compliant with FCC standards.

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Area of Science:

Optoelectronics
Nonlinear Optics
Pulse Generation

Background:

Ultrawideband (UWB) monocycle pulses are crucial for high-data-rate communication systems.
Existing methods for generating UWB pulses often face limitations in terms of complexity or efficiency.

Purpose of the Study:

To propose and demonstrate a novel scheme for generating ultrawideband (UWB) monocycle pulses.
To utilize cross-phase modulation (XPM) in a semiconductor optical amplifier (SOA) for efficient pulse generation.

Main Methods:

The proposed system employs a semiconductor optical amplifier (SOA) and an optical bandpass filter (OBF).
Cross-phase modulation (XPM) is used to phase modulate a continuous wave (CW) probe signal with an optical Gauss pulse.
An optical bandpass filter (OBF) converts the phase modulation to intensity modulation.

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Main Results:

A pair of polarity-reversed UWB monocycle pulses is successfully generated.
The generated pulses meet the ultrawideband (UWB) definition set by the Federal Communications Commission (FCC).
The scheme leverages the linear slopes of the OBF to achieve the desired pulse characteristics.

Conclusions:

The proposed XPM-based scheme offers a novel and effective approach for generating UWB monocycle pulses.
The method provides a pathway for creating FCC-compliant UWB signals.
This technique holds potential for advancements in UWB communication technologies.