Patent ID: 8260146
Filing Date: 2012-09-04
Classification: H04B

Abstract:
1. A transceiver for use in a free space optical communications system, the transceiver comprising: an optical circulator having a first port coupled to a first optical fiber, a second port coupled to a second optical fiber and a third port coupled to a third optical fiber, the optical circulator coupling first light received at the first port to the second port and further coupling second light received at the second port to the third port, the second optical fiber being a higher mode fiber than the first optical fiber but not significantly degrading a mode structure of the first light from the first optical fiber, the third optical fiber being a higher or comparable mode fiber to the second optical fiber; and a telescope operably coupled to the second optical fiber, the telescope for transmitting the first light along a first free space optical path and further for receiving the second light along a second free space optical path that is substantially counter-propagating to the first free space optical path.