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All-optical pulse shaping for ultrawideband doublet pulses using nonlinear optical loop mirror with optical
Junsu Lee1, You Min Chang, Ju Han Lee
1School of Electrical and Computer Engineering, University of Seoul, Seoul 130-743, South Korea.
Optics Letters
|November 4, 2011
Summary
We present a novel photonic method using a nonlinear optical loop mirror with optical parametric amplification to generate ultrawideband (UWB) doublet pulses. This technique successfully converts soliton pulses into UWB doublet signals, enabling error-free transmission.
Area of Science:
- Photonics and Optical Engineering
- Nonlinear Optics
- Optical Communications
Background:
- Ultrawideband (UWB) doublet pulses are crucial for high-speed optical communications.
- Existing methods for generating UWB doublet pulses face limitations in efficiency and complexity.
- Nonlinear optical effects in fiber optics offer potential for novel pulse generation schemes.
Purpose of the Study:
- To propose and experimentally demonstrate a new photonic scheme for generating UWB doublet pulses.
- To utilize cross-phase modulation and optical parametric amplification (OPA) within a nonlinear optical loop mirror (NOLM) for pulse shaping.
- To evaluate the performance of the generated UWB doublet pulses in a fiber optic communication system.
Main Methods:
- An optical fiber-based nonlinear optical loop mirror (NOLM) was designed and implemented.
- The NOLM incorporated optical parametric amplification (OPA) to enhance pulse shaping capabilities.
- Input soliton pulses were shaped into UWB doublet pulses using the combined effects of cross-phase modulation and OPA within the NOLM.
- The generated pulses were transmitted over a fiber link at a data rate of 1.25 Gbit/s to assess system performance.
Main Results:
- The proposed scheme successfully converted input soliton pulses into UWB doublet pulses.
- The NOLM with OPA provided an ideal transfer function for doublet pulse generation.
- Experimental demonstration confirmed the feasibility of the proposed photonic scheme.
- Propagation of 1.25 Gbit/s UWB doublet pulses over a fiber link resulted in error-free transmission.
Conclusions:
- The developed photonic scheme offers an effective alternative for generating UWB doublet pulses.
- The integration of OPA within a fiber-based NOLM is a promising approach for advanced optical signal generation.
- The demonstrated error-free transmission highlights the potential of this method for future high-speed optical communication systems.
