Compensated broadband fiber light source with stable mean wavelength
First Claim
1. A fiber light source comprising:
- 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 coupled to a first end of the first segment and a first end of the second segment, the optical coupler configured to split the pump laser beam based on a power coupling ratio such that a first portion of the pump laser beam is coupled to the first segment at a first power level and a second portion of the pump laser beam is coupled to the second segment at a second power level;
wherein the first segment of rare earth doped fiber generates a first stimulated emission having a first mean wavelength sensitivity to pump laser power fluctuations and the second segment of rare earth doped fiber generates a second stimulated emission having a second mean wavelength sensitivity to pump laser power fluctuations such that, when the first stimulated emission is combined with the second stimulated emission, a combined stimulated emission is approximately insensitive to pump laser power fluctuations.
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Abstract
A fiber light source comprises a laser pump 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 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 pump laser power fluctuations such that a combined stimulated emission is approximately insensitive to pump laser power fluctuations.
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Citations
12 Claims
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1. A fiber light source comprising:
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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 coupled to a first end of the first segment and a first end of the second segment, the optical coupler configured to split the pump laser beam based on a power coupling ratio such that a first portion of the pump laser beam is coupled to the first segment at a first power level and a second portion of the pump laser beam is coupled to the second segment at a second power level; wherein the first segment of rare earth doped fiber generates a first stimulated emission having a first mean wavelength sensitivity to pump laser power fluctuations and the second segment of rare earth doped fiber generates a second stimulated emission having a second mean wavelength sensitivity to pump laser power fluctuations such that, when the first stimulated emission is combined with the second stimulated emission, a combined stimulated emission is approximately insensitive to pump laser power fluctuations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of reducing mean wavelength sensitivity of a fiber light source to pump power fluctuations, the method comprising:
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generating a pump laser beam at a predetermined wavelength; splitting the pump laser beam into a first portion of the pump laser beam and a second portion of the pump laser beam based on a power coupling ratio, the first portion of the pump laser beam having a first power level and the second portion of the pump laser beam having a second power level; providing the first portion of the pump laser beam to a first segment of rare earth doped fiber, the first segment of rare earth doped fiber configured to generate a first stimulated emission having a first mean wavelength sensitivity to pump power fluctuations based on the first portion of the pump laser beam; providing the second portion of the pump laser beam to a second segment of rare earth doped fiber, the second segment of rare earth doped fiber configured to generate a second stimulated emission having a second mean wavelength sensitivity to pump power fluctuations based on the second portion of the pump laser beam; and combining the first stimulated emission with the second stimulated emission such that a combined stimulated emission is approximately insensitive to pump laser power fluctuations. - View Dependent Claims (10, 11, 12)
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Specification