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Raman-Enhanced Phase-Sensitive Fibre Optical Parametric Amplifier.

Xuelei Fu¹, Xiaojie Guo¹, Chester Shu¹

¹Department of Electronic Engineering and Center for Advanced Research in Photonics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong.

Scientific Reports

|February 3, 2016

Summary

This summary is machine-generated.

Researchers enhanced phase-sensitive amplification by using Raman amplification to boost parametric gain. This improved the gain extinction ratio, enabling better low-noise amplification performance.

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Area of Science:

Optics and Photonics
Quantum Information Science

Background:

Phase-sensitive amplification offers potential for noiseless signal amplification.
The gain extinction ratio is a critical metric for evaluating phase-sensitive amplifier performance.
Increasing phase-insensitive parametric gain enhances the gain extinction ratio in fiber optical parametric amplifiers.

Purpose of the Study:

To improve the performance of phase-sensitive amplification.
To investigate the use of Raman amplification for boosting phase-insensitive parametric gain.
To enhance the gain extinction ratio in phase-sensitive fiber optical parametric amplifiers.

Main Methods:

Utilized backward Raman amplification to increase phase-insensitive parametric gain.
Employed a 955 mW Raman pump.
Measured the impact on gain extinction ratio and maximum phase-sensitive gain.

Main Results:

Achieved a 9.2 dB increase in the gain extinction ratio.
Observed an 18.7 dB improvement in maximum phase-sensitive gain.
Demonstrated the effectiveness of Raman amplification in enhancing phase-sensitive operation.

Conclusions:

Backward Raman amplification effectively boosts phase-insensitive parametric gain, thereby improving phase-sensitive amplification.
This technique enhances the gain extinction ratio, crucial for low-noise amplification.
The proposed scheme is beneficial for spectral regions with limited parametric pump strength but available broadband Raman amplification.