Arrangement for multiplexing and/or demultiplexing optical signals having a plurality of wavelengths
View Patent ↗An arrangement for multiplexing and/or demultiplexing optical signals having a plurality of wavelengths, including a multiplex body having two parallel surfaces between which light is reflected back and forth and in this case is coupled in or out in a wavelength-dependent manner, and structures for coupling optical signals into or out of the multiplex body. According to the invention, the structures for coupling optical signals into or out of the multiplex body have a plurality of essentially structurally identical subassemblies, each subassembly having an optoelectronic transducer and an associated optical system, by which light having a wavelength is respectively coupled into or out of the multiplex body.
1. An apparatus for multiplexing and/or demultiplexing optical signals having a plurality of wavelengths, the apparatus comprising:
a multiplex body having first and second parallel surfaces between which light is reflected back and forth and coupled in or out in a wavelength-dependent manner;
a first subassembly including a first optoelectronic transducer on a first side of a first substrate and an associated optical system having a first lens in a second side of the first substrate; and
a second subassembly including a second optoelectronic transducer on a first side of a second substrate and an associated optical system having a second lens in a second side of the second substrate; and
means for providing an angular orientation of the optical path of each subassembly with respect to the second surface of the multiplex body, wherein the means for providing the angular orientation comprises spacers, each spacer being arranged between an associated subassembly and the second surface of the multiplex body, wherein the spacers are connected to one another with a defined spacing and form a placement part that is placed onto the second surface of the multiplex body.
2. The apparatus as claimed in claim 1 , wherein the optical systems of the subassemblies are formed such that each subassembly provides an optical path comprising a parallel beam pencil.
3. The apparatus as claimed in claim 1 , wherein each subassembly is mechanically connected to the multiplex body.
4. The apparatus as claimed in claim 1 , wherein each subassembly is assigned an eccentrically arranged spacer, which provides a tilted arrangement of the subassembly with respect to the second surface of the multiplex body such that optical signals of the optical path are coupled in or out obliquely with respect to the second surface of the multiplex body.
5. The apparatus as claimed in claim 1 , wherein each spacer is premounted on its associated subassembly.
6. The apparatus as claimed in claim 1 , wherein each spacer is formed as an integrated part of its associated subassembly.
7. The apparatus as claimed in claim 1 , further comprising wavelength-selective filters, each wavelength-selective filter being assigned to an optical path and being provided on at least one of the first and second surfaces of the multiplex body, wherein each wavelength-selective filter is assigned to an associated subassembly.
8. The apparatus as claimed in claim 7 , wherein the wavelength-selective filters are separate carrier parts arranged on the second surface of the multiplex body and between multiplex body and the associated subassembly.
9. The apparatus as claimed in claim 7 , wherein the wavelength-selective filters and assigned subassemblies are arranged on the second surface of the multiplex body.
10. The apparatus as claimed in claim 9 , wherein the first surface of the multiplex body is provided with a broadband reflection layer, which reflects all optical signal wavelengths.
11. The apparatus as claimed in claim 1 , wherein each subassembly includes a monitor diode optically coupled to the optoelectronic transducer of that subassembly.
12. The apparatus as claimed in claim 1 , wherein the optoelectronic transducer and the associated optical system of each subassembly are mounted on a leadframe.
13. The apparatus as claimed in claim 12 , wherein the optoelectronic transducer, the associated optical system and the leadframe of each subassembly are at least partially encapsulated with a potting compound.
14. The apparatus as claimed in claim 1 , wherein the optoelectronic transducer of each subassembly comprises a transmission component, and each subassembly differs from the other subassemblies with respect to the wavelength of the light emitted by the transmission component of the respective subassembly.
15. The apparatus as claimed in claim 1 , wherein the optoelectronic transducer of each subassembly comprises a reception component.
16. The apparatus as claimed in claim 1 , further comprising a separate coupling assembly provided on the first surface of the multiplex body.
17. The apparatus as claimed in claim 16 , wherein the separate coupling assembly has a lens that focuses the optical signals within the multiplex body onto a core of an optical waveguide that is coupled to the coupling assembly.
18. The apparatus as claimed in claim 16 , wherein the separate coupling assembly has means for guiding and fixing an optical waveguide to the coupling assembly.