COMPENSATED BROADBAND FIBER FILTER LIGHT SOURCE WITH STABLE MEAN WAVELENGTH

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PROBLEM TO BE SOLVED : To provide a broadband fiber filter light source having a sufficiently stable mean wavelength over a range of pump laser power.SOLUTION : A fiber light source 105 comprises a pump laser configured to generate a pump laser beam at a predetermined wavelength, a first segment of rare earth doped fiber, a second segment of rare earth doped fiber, and an optical coupler 110 coupled to a first end of the first segment and a first end of the second segment. The optical coupler is configured to split the pump laser beam based on a power coupling ratio. The first segment generates a first stimulated emission having a first mean wavelength sensitivity to pump laser power fluctuations and the second segment generates a second stimulated emission having a second mean wavelength sensitivity to the pump laser power fluctuations such that a combined stimulated emission is approximately insensitive to the pump laser power fluctuations.SELECTED DRAWING : Figure 1COPYRIGHT : (C)2017, JPO&INPIT