An optical module includes a package, which accommodates an optical system. A package main body has an opening. A lid is attached to the main body to close the opening of the main body. The lid seals the package. An anti-deterioration agent for preventing deterioration of the optical system is locat
An optical module includes a package, which accommodates an optical system. A package main body has an opening. A lid is attached to the main body to close the opening of the main body. The lid seals the package. An anti-deterioration agent for preventing deterioration of the optical system is located inside the package at a position out of a light path of the optical system. The anti-deterioration agent includes at least one of desiccant and deoxidant.
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The invention claimed is: 1. An optical module, wherein the optical module includes a package that accommodates an optical system having a light path, the optical module comprising; a main body, which is part of the package, wherein the main body has an opening; a lid, which is attached to the main
The invention claimed is: 1. An optical module, wherein the optical module includes a package that accommodates an optical system having a light path, the optical module comprising; a main body, which is part of the package, wherein the main body has an opening; a lid, which is attached to the main body to close the opening of the main body, wherein the lid seals the package; and an anti-deterioration agent located inside the package at a position out of said light path of the optical system, wherein said anti-deterioration agent is for preventing deterioration of the optical system, wherein the anti-deterioration agent includes at least one of desiccant and deoxidant, wherein the optical system includes a demultiplexing unit for separating incident light that includes optical signals having different wavelengths into each wavelength; wherein the optical system includes a collimator lens for converting incident light that includes optical signals into parallel light, wherein the demultiplexing unit includes a diffraction grating for separating the parallel light into optical signals having different wavelengths, and wherein the separated optical signals are each converged by the collimator lens; wherein the diffraction grating is inclined with respect to an optical axis of the collimator lens; wherein the anti-deterioration agent is a molded piece formed into a predetermined shape, and wherein the anti-deterioration agent is located at a space formed between the diffraction grating and the package at the rear of the diffraction grating. 2. The optical module according to claim 1, wherein the optical system includes a multiplexing unit for combining incident light that includes optical signals having different wavelengths. 3. An optical module, wherein the optical module includes a package that accommodates an optical system having a light path, the optical module comprising; a main body, which is part of the package, wherein the main body has an opening; a lid, which is attached to the main body to close the opening of the main body, wherein the lid seals the package; an anti-deterioration agent located inside the package at a position out of said light path of the optical system, wherein said anti-deterioration agent is for preventing deterioration of the optical system, wherein the anti-deterioration agent includes at least one of desiccant and deoxidant; wherein the main body is hollow cylindrical, having openings at both ends of the main body, wherein the package includes two lids, and wherein each lid closes one of the openings of the hollow cylindrical main body, wherein the two lids include a first lid, and a demultiplexing unit is secured to the first lid, wherein the demultiplexing unit includes a diffraction grating, and a fixing member for securing the diffraction grating to the first lid in a state in which the diffraction grating is inclined with respect to the light path of the optical system, wherein the fixing member includes the anti-deterioration agent. 4. An optical module, wherein the optical module includes a package, which accommodates an optical system, the optical module comprising; a main body, which is part of the package, wherein the main body has an opening; a lid, which is attached to the main body to close the opening of the main body, wherein the lid seals the package; and an anti-deterioration agent located inside the package at a position out of a light path of the optical system for preventing deterioration of the optical system, wherein the anti-deterioration agent includes a first molded piece, which is formed into a sheet, and a second molded piece, which is formed into a block, wherein the optical system includes a collimator lens and a diffraction grating, wherein the collimator lens converts incident light, which consists of optical signals, into parallel light, and where the diffraction grating separates the parallel light into optical signals having different wavelengths, and wherein the first molded piece is located along the inner surface of the main body, and the second molded piece is located at the rear of the diffraction grating. 5. The optical module, according to claim 4, wherein the anti-deterioration agent includes at least one if the desiccant and deoxidant. 6. The optical module according to claim 4, wherein the diffraction grating is inclined with respect to a light axis of the collimator lens.
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