Fiber optical communication line with shut off control

Details Fiber optical communication line with shut off control Fiber optical communication line with shut off control

1993-06-29

1994-10-11

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Optical fiber

359337, 359177, 25022715, H01S 310, H04B 900, H01J 516

Patent

active

053552504

ABSTRACT:
The telecommunication line comprises at least one terminal station having an optical-signal transmitter and an optical-signal receiver, which are operationally connected by an automatic protection device suitable for shutting down said transmitter in the absence of a received optical signal, at least one opticalfibre line for the transmission of the optical signals transmitted by said transmitter and received by said receiver, and at least one optical amplifier included in said line. With said optical amplifier there are associated means for the detection of the presence of light energy at input and means for causing the shut down of the amplifier, which in the absence of light energy at input are caused by said detection means to interrupt substantially any emission of light energy on the part of said optical amplifier.

REFERENCES:
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patent: 4313224 (1982-01-01), Wakabayashi et al.
patent: 4435849 (1984-03-01), Ilgner et al.
patent: 4696060 (1987-09-01), Oswald
patent: 4882774 (1989-11-01), Grotzinger
patent: 4887309 (1989-12-01), Andersson et al.
patent: 4954786 (1990-09-01), Yamahawa et al.
patent: 5003268 (1991-03-01), Tsuchiya
patent: 5054876 (1991-10-01), Grasso et al.
patent: 5113459 (1992-05-01), Grasso et al.
Patent Abstracts of Japan vol. 10, No. 82 (E-392) (2139) Apr. 2, 1986 and JP-A-60 229 433 (Nippon Denki-abstract).

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