Patent ID: 6856741
Filing Date: 2005-02-15
Classification: G02B,H04B

Abstract:
1. A terminal in a free-space wavelength duplexed system comprising: a telescope having an equipment end a free-space end that is adapted to carry free-space, wavelength duplexed, communication; an optical splitter having a first port connected said equipment end of said telescope; an optical transmitter for generating an optical signal composed of signals developed by modulating each of a plurality of laser sources with an input signal, and each of said laser sources having a distinct wavelength, said signal being coupled to a second port of said optical splitter; and an optical receiver coupled to a third port of said optical splitter, which receiver includes an optical amplifier and an optical filter followed by an optical-to-electrical converter, where said optical filter passes an optical signal of a wavelength that is different from any of the wavelengths of said laser sources.