Remote pumped dual core optical fiber system for use in subterranean wells
First Claim
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1. A downhole optical system, comprising:
- an optical fiber disposed in a subterranean well, the optical fiber comprising first and second cores; and
an optical fiber amplifier disposed in the well and connected to the optical fiber, wherein the optical fiber amplifier amplifies optical power in the first core of the optical fiber, wherein the optical fiber amplifier is optically pumped with optical power transmitted into the well via the second core of the optical fiber, and wherein the optical power in the second core is provided to an optical modulator that modulates a signal from a sensor and optically transmits the modulated signal via the first core.
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Abstract
A downhole optical system can include an optical fiber disposed in a subterranean well, and an optical fiber amplifier which amplifies optical power in a core of the optical fiber in the well, the amplifier being optically pumped with optical power in another core of the optical fiber in the well. Another downhole optical system can include an optical fiber disposed in a subterranean well, the optical fiber comprising multiple cores, and an optical fiber amplifier comprising multiple cores optically coupled respectively to the optical fiber multiple cores in the well.
45 Citations
27 Claims
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1. A downhole optical system, comprising:
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an optical fiber disposed in a subterranean well, the optical fiber comprising first and second cores; and an optical fiber amplifier disposed in the well and connected to the optical fiber, wherein the optical fiber amplifier amplifies optical power in the first core of the optical fiber, wherein the optical fiber amplifier is optically pumped with optical power transmitted into the well via the second core of the optical fiber, and wherein the optical power in the second core is provided to an optical modulator that modulates a signal from a sensor and optically transmits the modulated signal via the first core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A downhole optical system, comprising:
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an optical fiber disposed in a subterranean well, the optical fiber comprising first and second cores; and an optical fiber amplifier disposed in the well and connected to the optical fiber, the optical fiber amplifier comprising first and second cores optically coupled respectively to the optical fiber first and second cores, wherein optical power is transmitted into the well via the optical fiber second core to the second core of the optical fiber amplifier, and wherein the optical power in the optical fiber second core is provided to an optical modulator that modulates a signal from a sensor and optically transmits the modulated signal via the optical fiber first core. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A downhole optical system, comprising:
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an optical fiber disposed in a subterranean well; and an optical fiber amplifier disposed in the well and connected to the optical fiber, wherein the optical fiber amplifier amplifies optical power in a single mode core of the optical fiber, wherein the optical fiber amplifier is optically pumped with optical power transmitted into the well via a multiple mode core of the optical fiber, wherein the single mode core is surrounded by the multiple mode core, and wherein the optical power in the multiple mode core is provided to an optical modulator that modulates a signal from a sensor and optically transmits the modulated signal via the single mode core. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification