Optical fiber filter

Details Optical fiber filter Optical fiber filter

1990-01-17

1991-11-05

Sikes, William L.

Optical waveguides

With optical coupler

Particular coupling function

356352, 385 50, 385 72, 385 73, G02B 638

Patent

active

050626841

ABSTRACT:
A low loss, tunable optical filter (20) comprises two ferrules (24--24) which are aligned axially with each of two adjacent end faces being provided with a wafer (30). A mirror (40) is embedded between each end face and its associated wafer, the wafer being bonded to the end face of its associated wafer. Optical fiber is disposed in a passageway which extends through each ferrule and through the associated wafer. The ferrules and associated wafers are supported to cause adjacent exposed faces of the wafers to be in predetermined spatial relation to each other. Any gap therebetween may be fixed or may be adjusted by a piezoelectric transducer system (44). The disclosed filter provides rejection ratios which are sufficiently high for frequency discrimination in frequency shift keying systems and for channel selection or switching in wave division multiplexer applications.

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patent: 4383732 (1983-05-01), Dalgoutte et al.
patent: 4830451 (1989-05-01), Stone
patent: 4861136 (1989-08-01), Stone et al.
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W. Iuma et al., "Control of Mirror Position in a High Precision Intefereometer", Journal of Physical E. Scientific Instruments 1973, pp. 169-170.

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