Abstract: An apparatus comprising a case, an optical amplifier, and an optical transceiver is provided. The optical amplifier and the optical transceiver are included in the case. The case includes a top portion and a bottom portion. The top portion includes first to third sections arranged in a direction perpendicular to a direction extending from the top portion to the bottom portion. The first section has a larger area than the third section and the second section divides the first and third sections. The third section includes a first cavity including at least one portion of the optical amplifier. The optical amplifier is provided using at least one of an amplifying fiber, a pumping light source, an isolator, a wavelength-division multiplexer (WDM) coupler, a wavelength-variable optical filter, a monitoring-tap photo diode, and a driving control unit.

Abstract: The present invention provides a compact optical fiber amplifier, which can minimize the size of an optical module and increase the degree of freedom in mounting the module on a board. The compact optical fiber amplifier according to the present invention includes: an optical module including a plurality of optical elements provided therein, an input port for introducing an optical fiber thereinto, and an outlet port for extract the optical fiber to the outside of the module; and a plurality of optical fibers introduced into or extracted from the optical module through the input port or the outlet port of the optical module and disposed above a predetermined radius of curvature on the outside of the optical module.

Abstract: The present invention provides a compact optical fiber amplifier, which can minimize the size of an optical module and increase the degree of freedom in mounting the module on a board. The compact optical fiber amplifier according to the present invention includes: an optical module including a plurality of optical elements provided therein, an input port for introducing an optical fiber thereinto, and an outlet port for extract the optical fiber to the outside of the module; and a plurality of optical fibers introduced into or extracted from the optical module through the input port or the outlet port of the optical module and disposed above a predetermined radius of curvature on the outside of the optical module.