Patent ID: 7532826

Claim:
An optical receiver assembly for demultiplexing and interpreting an optical signal, the optical signal comprising a plurality of signals of different wavelengths, the assembly comprising: a. a demultiplexer sub-assembly, comprising: i. a filter block sub-assembly for separating the plurality of signals of different wavelengths, comprising: A. a glass spacer, the glass spacer introducing different path delays in the transmission of each of the plurality of signals of different wavelengths; B. a reflector, the reflector reflecting the optical signal received from the glass spacer back into the glass spacer; and C. a plurality of filters, each of the plurality of filters filtering one of the plurality of signals of different wavelengths, wherein a first of the plurality of filters is co-axially aligned with a path of the optical signal and transmits one of the plurality of signals substantially without deviation; and ii. a housing for housing the filter block sub-assembly, wherein the housing comprises: a. a receptacle bore with a collimating lens, the collimating lens collimating the optical signal into the filter block sub-assembly; b. a pocket for holding the filter-block assembly; and c. an array of lenses, the array of lenses focusing the plurality of signals of different wavelengths received from the filter block sub-assembly onto the receiver sub-assembly, wherein a first lens of the array of lenses is co-axial with the receptacle bore and receives the one of the plurality of signals transmitted by the first filter, wherein the housing is plastic that is molded in a single shot molding process such that at least the filter block sub-assembly or a pocket for the filter block sub-assembly, a receptacle bore and collimating lens, and the array of lenses are contained in two opposing sides of a single shot mold providing optical alignment for the optical receiver assembly; and b. a multi-channel receiver optical sub-assembly mounted to the housing for interpreting the plurality of signals of different wavelengths, wherein the plurality of signals of different wavelengths are received from the demultiplexer sub-assembly.