07587141 is referenced by 17 patents and cites 7 patents.

A free-space communication transceiver includes a telescope for transmitting and receiving laser beams, a tunable laser transmitter for generating a transmit laser beam modulated with data, a tunable optical receiver for processing a receive laser beam received from the telescope to recover data, and a tunable beamsplitter that directs the transmit laser beam to the telescope and directs the receive laser beam from the telescope to the optical receiver. Between the telescope and beamsplitter, the transmit and receive laser beams travel along a common optical axis as collinear collimated free-space beams. The transmit and receive laser beams operate at different wavelengths that can be interchanged, thereby support full-duplex operation. The beamsplitter employs a tunable etalon filter whose wavelength-dependent transmission characteristics are adjusted according to the transmit and receive wavelengths. Optionally, RF signals can additionally be couple to the common optical axis and transmitted and received by the telescope.

Title
Communication transceiver architecture
Application Number
11/194740
Publication Number
7587141 (B2)
Application Date
August 2, 2005
Publication Date
September 8, 2009
Inventor
Michael Gangl
Springboro
OH, US
Donald Fisher
Greene
OH, US
Agent
Edell Shapiro & Finnan
Assignee
ITT Manufacturing Enterprises
DE, US
IPC
H04B 10/00
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