Low and Medium Frequency Noise Levels of fibered very-high-power 1460nm-Pump Laser Diode designed for Raman Amplification.

We report low and medium frequency optical noise measurements on very-high-power fibered 1460nm-Pump Lasers (P > 200mW) designed for Raman Amplification. These Fabry-Perot Lasers exhibit spectra from a quite monomode situation (Side Mode Suppression Ratio ≈ 10dB) at near threshold current injection (Ithreshold ≈ 28mA) up to very multimode spectra (5nm Full Width at Half Magnitude) at very high biases (ILaser ≈ 1000mA). In this paper, we have to focus on two main things : on one hand, the low and medium frequency noise behavior of the laser itself and on the other hand the measurement data post-treatment. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]