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Noise evolution with the phase-sensitive gain in a hybrid fiber phase-sensitive amplifier
Optics Letters
|June 2, 2020
Summary
This study shows that hybrid fiber phase-sensitive amplifiers (PSAs) significantly improve noise performance. A combined noise figure below 3 dB was achieved, outperforming conventional erbium-doped fiber amplifiers.
Area of Science:
- Optical Engineering
- Telecommunications
- Fiber Optics
Background:
- Fiber-sensitive amplifiers (PSAs) are crucial for optical communication systems.
- Erbium-doped fiber amplifiers (EDFAs) are widely used but have limitations in noise performance.
- Hybrid amplifiers combining PSA and EDFA offer potential for improved signal amplification.
Purpose of the Study:
- To investigate the noise evolution in a hybrid fiber PSA-EDFA.
- To evaluate the impact of phase-sensitive gain on the amplifier's noise figure (NF).
- To compare the performance of the hybrid amplifier against a conventional EDFA.
Main Methods:
- Experimental evaluation of noise performance in both optical and electrical domains.
- Characterization of a hybrid amplifier with a total gain of 45.6 dB.
- Varying the phase-sensitive gain of the PSA component.
Main Results:
- Noise figure improvement was observed in the low PSA gain region.
- A combined NF below 3 dB was achieved with a PSA gain of 9 dB.
- The hybrid amplifier demonstrated a 1.1 dB better NF than a conventional EDFA with similar overall gain.
Conclusions:
- Hybrid fiber PSAs offer superior noise performance compared to conventional EDFAs.
- Optimizing PSA gain is key to minimizing the overall noise figure.
- This hybrid approach presents a promising solution for low-noise optical amplification.
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