Patents Assigned to BT&D Technologies
  • Optical fiber connector structure including three ferrules and an optical baffle
    Patent number: 5315680
    Abstract: An optical transmitter (1) comprises a semiconductor laser optical source (14) housed in an optical fibre connector component. An optical baffle (8) such as a short section of optical fibre ensures that only minimal power is emitted to the environment when the transmission fibre (6) is withdrawn from the connector.
    Type: Grant
    Filed: August 11, 1992
    Date of Patent: May 24, 1994
    Assignee: BT&D Technologies
    Inventors: Robert W. Musk, Christopher F. Beesley
  • Photodiode photodetector with adjustable active area
    Patent number: 5315104
    Abstract: The output of semiconductor optical sources is monitored by a photo detector including a photodiode having a photosensitivity which is less than the total active area of the device. Conveniently these active areas may be arranged in groups. The electrical output of selected areas or groups of areas or both may be arranged to be enabled or disabled as appropriate to provide the required photo responsivity of the device.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: May 24, 1994
    Assignee: BT&D Technologies
    Inventor: Richard G. Plumb