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Few-mode multi-element fiber amplifier for mode division multiplexing
Optics Express
|November 18, 2014
Summary
This study demonstrates a novel fiber amplifier with multiple signal fibers for enhanced performance. It achieved significant gain, paving the way for advanced optical amplification systems.
Area of Science:
- Optics and Photonics
- Fiber Optics Technology
- Laser Amplification
Background:
- Cladding-pumped fiber amplifiers offer high power and efficiency.
- Multi-element fibers enable multiplexing of optical signals.
- Erbium/Ytterbium co-doping is a standard for 1550 nm amplification.
Purpose of the Study:
- To experimentally demonstrate a few-moded cladding-pumped multi-element fiber amplifier.
- To investigate the gain performance and modal properties of such a device.
- To assess its potential for wavelength division multiplexing (WDM) signal amplification.
Main Methods:
- Fabrication of a multi-element fiber comprising 4 Er/Yb co-doped signal fibers and 1 multimode pump fiber within a common polymer coating.
- Experimental setup for cladding-pumping the amplifier.
- Characterization of WDM signal gain and differential modal gain across the 1542-1560 nm spectral range.
Main Results:
- Demonstration of a few-moded cladding-pumped multi-element fiber amplifier with a total spatial path multiplicity of 12.
- Achieved an average WDM signal gain of 18.3 dB.
- Measured a differential modal gain of 1.1 dB in the 1542-1560 nm spectral range.
Conclusions:
- The demonstrated fiber amplifier architecture is effective for achieving high gain in a multi-element configuration.
- The results show potential for advanced optical communication systems requiring high-capacity amplification.
- Further research could explore optimizing modal properties for even better performance.
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