Optical waveguides – Accessories – Attenuator
Patent
1998-09-01
2000-05-09
Palmer, Phan T. H.
Optical waveguides
Accessories
Attenuator
385 88, 385 92, 385 93, G02B 600
Patent
active
060614935
ABSTRACT:
The present invention provides in improved Transmitting Optical Subassembly (TOSA) for coupling an optical output signal from an optical transmitter to an optical fiber sheathed within a fiber optic connector ferrule. The TOSA includes a housing formed of precision molded plastic or machined metal. A first end of the housing includes an optics cavity configured to receive an optical element for emitting an optical signal. A second end of the housing is configured as a long bore configured to receive an optical fiber connector ferrule. The housing further defines a lens cavity for retaining a focusing element between the optics cavity and the ferrule receiving bore. Finally, the housing also includes an attenuator receiving aperture between the optics cavity and the ferrule receiving bore. The plug receiving aperture is configured to removably receive an attenuation plug whereby the optical output of the optical element passes through the attenuator plug and is attenuated. The present invention further provides a method of normalizing the output signal of optical transmitters by measuring the output signals of the transmitters, comparing the measured signals to a normal reference signal, and attenuating the measured signal in order to more nearly match the reference signal.
REFERENCES:
patent: H491 (1988-07-01), Pitruzzello et al.
patent: 5309542 (1994-05-01), Strope et al.
patent: 5812717 (1998-09-01), Gilliland
Gilliland Patrick B.
Weiss Roger E.
Methode Electronics Inc.
Newman David L.
Palmer Phan T. H.
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