摘要:
PROBLEMAn object of the present invention is to easily and inexpensively manufacture an array-type photo module and, in addition, coexist high-density array and low crosstalk.SOLUTIONThe present invention provides an array-type photo module M including a filter 31, which, in each channel, transmits therethrough a portion of emitting light from an incident optical fiber 11 on the opposite side of a gradient-index lens array 2 and reflects another portion of the emitting light from the incident optical fiber 11 toward the gradient-index lens array 2, and a light-shielding member 32 (33) which is arranged on the opposite side of the gradient-index lens array 2 of the filter 31 so as to be spaced from the filter 31 and, in each channel, has an opening 34 (35) passing therethrough transmitted light from the filter 31 on the opposite side of the filter 31.
摘要:
The present invention provides an array-type photo module including a filter, which, in each channel, transmits therethrough a portion of emitted light from an incident optical fiber on the opposite side of a gradient-index lens array and reflects another portion of the emitted light from the incident optical fiber toward the gradient-index lens array, and a light-shielding member which is arranged on the opposite side of the filter from the gradient-index lens array, so as to be spaced from the filter and, in each channel, has an opening passing therethrough transmitted light from the filter on the opposite side of the filter. The array-type photo module is easily and inexpensively manufactured, and may be used in a high-density array, with low crosstalk.
摘要:
An optical module has a structure for reducing the stress applied to a package. The optical module is structured so that an end face of a waveguide (37) of a planar lightwave circuit (30) is joined to a plurality of packages (40) storing therein optical elements so that the waveguide is optically coupled to the optical elements. The optical module includes a housing (3) storing therein a planar lightwave circuit and a plurality of packages in which an upper face of a protrusion (270) formed in the bottom section is fixed to the planar lightwave circuit (30). Each of the plurality of packages (40) is electrically connected to an electric part (22) provided in the housing (3) via flexible printed circuits (271a, 271b).
摘要:
An optical module has a structure for reducing the stress applied to a package. The optical module is structured so that an end face of a waveguide (37) of a planar lightwave circuit (30) is joined to a plurality of packages (40) storing therein optical elements so that the waveguide is optically coupled to the optical elements. The optical module includes a housing (3) storing therein a planar lightwave circuit and a plurality of packages in which an upper face of a protrusion (270) formed in the bottom section is fixed to the planar lightwave circuit (30). Each of the plurality of packages (40) is electrically connected to an electric part (22) provided in the housing (3) via flexible printed circuits (271a, 271b).
摘要:
A plastic ferrule for an optical connector comprises a cylindrical portion having one insertion hole for fixing an optical fiber and directly related to connection, a holding portion for allowing the cylindrical portion to be stably held in an optical connector, and an guiding portion for allowing an optical fiber to be guided into the ferrule. The ferrule has a hollow, cylindrical hole centering around the insertion hole inside the cylindrical portion. Thus, the ferrule has excellent dimensional accuracy of the outer diameter, and achieves connection of single mode fibers excellent in connection reliability and economy.
摘要:
A packaging platform for optically coupling one or more optical waveguides of one or more optical components having the optical waveguide to one or more optical fibers is provided with a reference structure portion for the horizontal and vertical positioning of the optical component. The platform is further provided with one or more fiber positioning portions for inserting and holding the optical fiber and positioning the optical fiber at a position where the optical fiber is optically connected to the optical waveguide. The provided packaging platform and an optical module using the platform can simplify all alignment steps for optical coupling, electrical connection and sealing in the coupling of the optical component and the optical fiber.
摘要:
A high power pump light source for optical direct amplifier using the stimulated Raman effect is obtained by using a plurality of semiconductor lasers each of which provides low output power. More than two beams of the same wavelength generated by semiconductor lasers are combined (polarization multiplex) by using a polarization prism block, which provides sufficient high power pump light for the stimulated Raman effect amplifier. The output of said polarization prism block is wavelength division multiplexed with signal light to be amplified by using an interference filter block, the output of which is applied to a transmission optical fiber in which amplification of said signal light is effected.
摘要:
A bidirectional optical module according to the present invention emits light to an optical fiber and allows returning light from the optical fiber to enter and includes a plurality of light emitting elements that emit light to enter the optical fiber, a light receiving element that receives light having exited the optical fiber, and a non-reciprocal unit for making an optical path in a forward direction from the light emitting element to the optical fiber and an optical path in a backward direction from the optical fiber to the light emitting element different. Then, polarization planes of light incident on the optical fiber after being emitted from the plurality of light emitting elements are mutually orthogonal, and the non-reciprocal unit emits returning light of light emitted from the plurality of light emitting elements from the optical fiber toward the light receiving element to one light receiving element.
摘要:
A bidirectional optical module according to the present invention emits light to an optical fiber and allows returning light from the optical fiber to enter and includes a plurality of light emitting elements that emit light to enter the optical fiber, a light receiving element that receives light having exited the optical fiber, and a non-reciprocal unit for making an optical path in a forward direction from the light emitting element to the optical fiber and an optical path in a backward direction from the optical fiber to the light emitting element different. Then, polarization planes of light incident on the optical fiber after being emitted from the plurality of light emitting elements are mutually orthogonal, and the non-reciprocal unit emits returning light of light emitted from the plurality of light emitting elements from the optical fiber toward the light receiving element to one light receiving element.
摘要:
In an optical amplifier, light incident on a first port of a port separator is emitted out of a third port, and is input into and amplified in a semiconductor laser. Amplified light receives the first amount of rotation, e.g., a 45.degree. rotation, of the direction of polarization in a Faraday rotator assembly and is emitted outward. Light emitted out of the Faraday rotator assembly is reflected by the reflector. Passed through the Faraday rotator assembly backward, receives the second amount of rotation, e.g., a further 45.degree. rotation, of the direction of polarization in the same direction as the previous rotation, and is input into the semiconductor laser. The input light is amplified again in the semiconductor laser, is input in the third port of the port separator, and is emitted outward from a second port. The direction of polarization of light passing forward and backward through the semiconductor laser are orthogonal to each other, and therefore amplification will be done at a constant degree of amplification, regardless of the direction of polarization.