Method and device for regulating a medium with an amplifying effect, especially a fiber optical waveguide
OwnerLutz Rappinventor
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Abstract
The invention relates to a method and a device for regulating the optical amplification of a medium with an amplifying effect, especially a doped fiber optical waveguide. The intensity of the amplified spontaneous emission is used as a regulating variable for the amplification power, especially the power of a pump laser.
Claims40
A method for controlling an optical gain of a medium (26), with an amplifying effect, in an optical data transmission system that is fed energy on an optical or electrical path, and which effects an amplification of a light signal that traverses the medium, characterized in that the intensity of an amplified spontaneous emission (ASE) of light in the medium (26) is detected, and a procedure that is related to the gain of the medium (26) or to the structure containing the latter is initiated as a function of this intensity.
An optical isolator (=optical diode) for detecting an ASE in a data transmission and/or amplification path, having an input (6), an output (7) and means (8.1, 8.2), arranged therebetween, that are suitable, inter alia, to couple out backward-directed light, characterized in that a means is provided for detecting the backward-directed light.
An arrangement for detecting an ASE in an optical data transmission and/or amplification path, having an input (6) and an output (7) for light with optical data signals to be transmitted, characterized in that at least one frequency divider (15) and a detector (12) are provided between the input (6) and output (7), at least one frequency range without data signals being coupled out and supplied to the detector (12).
An optical data transmission system between a receiver (4) and a transmitter (1), having a means for controlling an optical gain of a medium (26) with an amplifying effect, the medium (26) with an amplifying effect being fed energy on an optical or electrical path and effecting an amplification of a light signal that traverses the medium, characterized in that means are provided for measuring the intensity of an amplified spontaneous emission (ASE) of the light in the medium (26), and means are provided that initiate, as a function of the intensity of the ASE, a procedure that is related to the gain of the medium (26) or to the structure containing the latter.
Dependencies are inferred from the claim text.