Wavelength de-multiplexing system and optical receiver module
AssigneesSumitomo Electric Industries, Ltd., Sumitomo Electric Device Innovations, Inc.
InventorsKazuaki Mii, Hiroshi Hara, Fumihiro Nakajima
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Abstract
A wavelength de-multiplexing system that receives a wavelength multiplexed signal and generates electrical signals corresponding to the optical signals is disclosed. The optical receiver module includes a lens, a lens unit, and an optical de-multiplexer (O-DeMux). The lens converts the wavelength multiplexed signal into a quasi-collimated beam. The lens unit narrows a diameter of the quasi-collimated beam. The O-DeMux de-multiplexes the narrowed quasi-collimated beam coming from the lens unit by wavelength selective filters (WSFs) each having optical distances from the lens unit different from each other.
Claims4
A wavelength de-multiplexing system that receives a wavelength multiplexed signal multiplexing optical signals each having wavelengths different from each other and generates electrical signals corresponding to the optical signals, the wavelength de-multiplexing system comprising:
- a lens that receives the wavelength multiplexed signal and converts the wavelength multiplexed signal into a quasi-collimated beam;
- a lens unit that receives the quasi-collimated beam and outputs a quasi-collimated beam with a diameter smaller than a diameter of the quasi-collimated beam output from the lens;
- and
- an optical de-multiplexer that de-multiplexes the quasi-collimated beam output from the lens unit, the optical de-multiplexer including a plurality of wavelength selective filters each having optical distances against the lens unit different from each other.
Dependencies are inferred from the claim text.