Etalon filters for optical channel selection in wavelength divis

Details Etalon filters for optical channel selection in wavelength divis Etalon filters for optical channel selection in wavelength divis

1988-01-25

1989-03-21

Lee, John D.

350311, G02B 632

Patent

active

048137561

ABSTRACT:
Filter arrangements (400,500,600) are disclosed for tunable channel selection in optical wavelength division multiplexed systems. Each filter arrangement has an etalon device (e.g. 401-403) as a simple, compact, in-line component which is rotatably adapted for interposing between the ends of fiber optic cables for interconnecting the cables. An optical beam emanating from a free end of each cable end is focused and directed to the etalon device by a collimated lensed connector (e.g. 411). Identical etalon devices may be stacked and ganged for rotation in unison to increase the number of system channels that may be propagated. Non-identical etalon devices may be stacked and made independently rotatable to increase the free spectral range of the system.

REFERENCES:
patent: 3902130 (1975-08-01), Pike
patent: 4671604 (1987-06-01), Soref
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