| 摘要 |
A method and apparatus to couple optical power into an optical fiber. A helically wound optical fiber (30) is provided for carrying optical information signals. The helically wound optical fiber includes: a core, the core having dopants to amplify the optical information signals and having an ncore refractive index; an input fiber portion for inputting the optical information signals to the helically wound optical fiber; an output fiber portion for outputting the optical information signals from the helically wound optical fiber, and cladding surrounding the core, the cladding having an ncladding refractive index less than the ncore refractive index. An optical resonator chamber (25) is provided for housing the helically wound optical fiber within the optical resonator chamber wherein the input fiber portion and the output fiber portion are located external to the optical resonator chamber. Optical pump power is transmitted at an optical pump wavelength into optical resonator chamber externally therefrom at one or more window locations to further amplify the optical information signals. The optical resonator chamber can also include a medium enclosed therewithin, the medium having a refractive index matching the ncladding refractive index.
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