Stabilization of the output power from a Raman fiber laser by generated-amplified spontaneous emission

In this work, an optical approach is theoretically presented for suppressing the low-frequency relative intensity noise transfer from the pump source to the Raman fiber laser output. This is accomplished by generating a sufficiently high-amplified spontaneous emission intensity at one Stokes shift in the wavelength from the lasing line to stabilize the latter at the cost of lasing efficiency. In addition, the clamped laser output can be easily controlled in a large dynamic range. These special properties suit the proposed Raman fiber laser to usage in Raman fiber amplifiers as the pump source.