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Methods, systems, and apparatus for optical communications. One of the apparatuses includes a spool comprising a spool wheel, one or more separate spool portions positioned on the spool wheel, and one or more bearings positioned on the spool wheel, wherein the one or more spool portions and the one

Methods, systems, and apparatus for optical communications. One of the apparatuses includes a spool comprising a spool wheel, one or more separate spool portions positioned on the spool wheel, and one or more bearings positioned on the spool wheel, wherein the one or more spool portions and the one or more bearings are configured such that an optical fiber ribbon can be wound through the spool; and a spring coupled to the spool wheel such that the spring provides a rotational force on the spool in a direction that winds the optical fiber ribbon.

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1. An optical fiber ribbon retractor apparatus comprising: a spool comprising a spool wheel, one or more separate raised spool portions positioned on the spool wheel, and one or more bearings positioned on the spool wheel, wherein the one or more spool portions and the one or more bearings are confi

1. An optical fiber ribbon retractor apparatus comprising: a spool comprising a spool wheel, one or more separate raised spool portions positioned on the spool wheel, and one or more bearings positioned on the spool wheel, wherein the one or more spool portions and the one or more bearings are configured to guide an optical fiber ribbon through the spool;a spring coupled to the spool wheel such that the spring provides a rotational force on the spool in a direction that winds the optical fiber ribbon;a housing, wherein the spool and the spring are positioned within the housing; andan interface optically coupled to a first end of the optical fiber ribbon, the interface being detachable from the housing while remaining optically coupled to the optical fiber ribbon. 2. The fiber ribbon retractor apparatus of claim 1, wherein the optical fiber ribbon follows a serpentine path through the spool when wound. 3. The fiber ribbon retractor apparatus of claim 1, wherein pulling one end of the optical fiber ribbon causes the spool to rotate in a first direction and wherein rotation of the spool in the first direction causes the spring to unwind. 4. The fiber ribbon retractor apparatus of claim 3, wherein a release of tension on the pulled end of the optical fiber ribbon causes the spool to rotate in a second direction in response to a winding force applied by the spring. 5. The fiber ribbon retractor apparatus of claim 1, wherein the housing includes a base portion and a cap portion. 6. An apparatus comprising: a housing;a fiber holder that fixes a first end of an optical fiber ribbon;an interface optically coupled to a second end of the optical fiber ribbon, the interface being detachable from the housing while remaining optically coupled to the optical fiber ribbon;a fiber ribbon retractor positioned between the fiber holder and the interface, wherein the optical fiber ribbon passes through the fiber ribbon retractor; andone or more guiding elements forming a path within the housing along which the fiber ribbon retractor can traverse when the fiber ribbon is extended or retracted, andwherein the fiber ribbon retractor includes a spool for winding a portion of the optical fiber ribbon such that the second end of the optical fiber ribbon can be extended through the interface by unwinding the spool and the extended optical fiber ribbon can be retracted by winding the spool. 7. The apparatus of claim 6, wherein the one or more guiding elements each include one or more stoppers at the respective ends of the guiding elements to restrict the movement of the fiber ribbon retractor. 8. The apparatus of claim 6, wherein the spool of the fiber ribbon retractor further comprises a spool wheel, one or more separate spool portions positioned on the spool wheel, and one or more bearings positioned on the spool wheel, wherein the one or more spool portions and the one or more bearings are configured such that an optical fiber ribbon can be wound through the spool. 9. The apparatus of claim 8, wherein the fiber ribbon retractor further comprises a spring coupled to the spool wheel such that the spring provides a rotational force on the spool in a direction that winds the optical fiber ribbon. 10. The apparatus of claim 6, further comprising a dense wavelength division multiplexer module coupled to the first end of the optical fiber ribbon. 11. The apparatus of claim 1, further comprising: an optical fiber holder that anchors a second end of the optical fiber ribbon; anda dense wavelength division multiplexer module communicatively coupled to the second end of the optical fiber ribbon via the optical fiber holder. 12. The apparatus of claim 11, wherein the optical fiber holder and the dense wavelength division multiplexer module are positioned within the housing. 13. An apparatus comprising: a housing;a fiber holder that fixes a first end of an optical fiber ribbon, wherein the optical fiber ribbon is a planar array of at least three optical fibers arranged in a compact flexible structure;an interface coupled to a second end of the optical fiber ribbon;a fiber ribbon retractor positioned between the fiber holder and the interface, wherein the optical fiber ribbon passes through the fiber ribbon retractor; andone or more guiding elements forming a path within the housing along which the fiber ribbon retractor can traverse when the fiber ribbon is extended or retracted, andwherein the fiber ribbon retractor includes a spool for winding a portion of the optical fiber ribbon such that the second end of the optical fiber ribbon can be extended through the interface by unwinding the spool and the extended optical fiber ribbon can be retracted by winding the spool.