Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1988-09-29
1990-04-17
Lee, John D.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
350 37, 350 9618, 350382, 455610, 362 32, G02B 632
Patent
active
049174533
ABSTRACT:
An optical communication signal source package and assembly for coupling optical signals to the end of an optical fiber includes first and second semiconductor laser diodes capable of being operated in a redundant fashion for increased reliability or to provide wavelength division multiplexing for increases in bandwidth and information carrying capability. The laser diodes are supported with their mounting flanges in a common plane and are oriented to provide parallel beams of polarized light having perpendicular E-field vectors. A connector carried by the support positions the optical fiber at the target area where an optics system focuses the light beams. An optical coupling device such as a polarizing beam splitter or a holographic beam separator is responsive to the orthogonal light beams to direct both light beams toward the optical fiber with minimum decrease in amplitude. The package includes no moving parts or highly frequency selective components. The package is employed in a compact communication signal coupling assembly permitting short electrical lead lengths and high circuit density.
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Block Timothy R.
Heiling Gerald M.
Karst Dennis L.
Kobliska David C.
Lu Tong
International Business Machines - Corporation
Lee John D.
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