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Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy

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Published on: May 18, 2011

Broadband polarization pulling using Raman amplification.

Nelson J Muga¹, Mário F S Ferreira, Armando N Pinto

¹Instituto de Telecomunicações, Campus de Santiago, Aveiro, Portugal. muga@av.it.pt

|September 22, 2011

Summary

This summary is machine-generated.

Polarization dynamics in Raman gain systems are explored. Optimal pump power maximizes polarization in depleted regimes, unlike undepleted regimes where it scales with pump power.

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Area of Science:

Nonlinear optics
Fiber optics

Background:

Raman gain is a key phenomenon in optical fiber amplifiers.
Polarization evolution affects signal quality and system performance.

Purpose of the Study:

Investigate Raman gain-induced polarization pulling in a copropagating scheme.
Analyze the influence of pump power and signal wavelength on polarization properties.

Main Methods:

Mapping the degree of polarization (DOP).
Measuring the angle between signal and pump output Stokes vectors.
Calculating mean signal gain and its standard deviation across the Raman gain bandwidth.

Main Results:

In the undepleted regime, DOP is proportional to pump power and follows the Raman gain shape with signal wavelength.
In the depleted regime, maximum DOP is not observed at highest pump powers.
An optimum pump power exists for achieving maximum DOP in the depleted regime.

Conclusions:

Raman gain significantly impacts polarization evolution in optical fibers.
Understanding the interplay between pump power, signal wavelength, and DOP is crucial for designing high-performance fiber-optic systems.
The findings provide insights into optimizing polarization control in Raman amplifiers.