Transmission apparatus using a plastic fiber

Optical waveguides – With disengagable mechanical connector – Optical fiber to a nonfiber optical device connector

Reexamination Certificate

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C385S014000

Reexamination Certificate

active

06874951

ABSTRACT:
Light, which has been produced by a semiconductor device and has wavelengths falling within the range of 630 nm to 680 nm, is propagated through a plastic fiber provided with a core containing a polymethyl methacrylate as a principal constituent. The temperature of the semiconductor device is adjusted by a temperature adjusting system comprising a heater for heating the semiconductor device, a temperature detector for detecting the temperature of the semiconductor device and feeding out a temperature detection signal, and a control circuit for controlling actuation of the heater in accordance with the temperature detection signal in order to set the temperature of the semiconductor device at a predetermined target value that is lower than the highest temperature assumed to occur under an environment, in which the semiconductor device is located.

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patent: 6678432 (2004-01-01), Shigeta et al.
patent: 20020118924 (2002-08-01), Murata
Ishigure, T. et al., “2.5 Gbit/s 100 m data transmission using graded-index polymer optical fibre and high-speed laser diode at 650 nm wavelength”, Electronics Letters, IEE Stevenage, GB, vol. 31, no. 6, Mar. 16, 1995, pp. 467-469, XP006002565.
Knowles, G. et al., “Influence of leakage and gain-cavity alignment on the performance of Al(GaInP) visible vertical-cavity surface emitting lasers” IEE Proceedings: Optoelectronics, Institution of Electrical Engineers, Stevenage, GB, vol. 148, no. 1, Feb. 16, 2001, pp. 55-59, XP006016130.
Dutta, A. K. et al., “Impedance, modulation response and equivalent-circuit of 650nm surface emitting type light-emitting diode for POF data-links”, Solid State Electronics, Elsevier Science Publishers, Barking, GB, vol. 42, no. 10, Oct. 1, 1998, pp. 1787-1791, XP004145291.

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