Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1989-08-23
1990-11-20
Healy, Brian
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
350 9616, 350 9630, 350 9634, 350311, 455601, 455608, 455609, 455610, 455612, 307425, 307430, G02B 626, G02F 100, H03F 700
Patent
active
049714171
ABSTRACT:
An optical repeater that amplifies and reshapes an input pulse without converting the pulse into the electrical domain. The repeater comprises an optical gain device, a mode selector, and an optical thresholding material. The optical gain device comprises an optical gain material with anti-reflection coatings at its input and output ports. The mode selector receives an optical signal amplified by the gain medium, and preferentially transmits one or more preselected spatial modes to the thresholding material, which shapes the pulses for retransmission.
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"Laser Amplifier Repeater Passes Test in 75-Mile Fiber Link," Electronic Engineering Times, Apr. 27, 1987.
Krinsky Jeffrey A.
Rempt Raymond D.
Healy Brian
The Boeing Company
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