Transmission station, intermediate repeater and receiver station

Details Transmission station, intermediate repeater and receiver station Transmission station, intermediate repeater and receiver station

1996-03-13

1998-07-07

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359115, 359177, 359181, H04J 1402, H04B 1016

Patent

active

057777640

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The instant invention relates to a transmitting station, an intermediate repeater and a receiving station for an optical communications-transmitting system with at least one intermediate repeater for transmitting useful data of a high bit rate by means of at least one optical narrow-band carrier signal and for transmitting additional data of a low bit rate.
An arrangement of this type is known from EP 440 276 A2, for example. An optical waveguide transmission system is disclosed there, wherein the useful data of a high bit rate and additional data of a low bit rate for service purposes are transmitted in one direction in an optical waveguide. The useful data of a high bit rate are transmitted at a data rate of several 100 MBit/sec, for example, in the wavelength range between 1500 and 1600 nm. This wavelength range corresponds to the so-called third optical window of the optical waveguide in which optical damping is at a minimum. The additional data are transmitted, for example at a data rate of some 100 kBit/sec, in a wavelength range around 1300 nm. This is the so-called second optical window of the optical waveguide.
This transmitting system utilizes intermediate repeaters with optical fiber amplifiers for the wavelength range between approximately 1500 to 1600 nm in order to compensate the damping losses in the glass fiber. The additional data are uncoupled by means of a wavelength multiplexer upstream of the fiber amplifiers, are subsequently detected, electrically processed, electro-optically converted and again coupled into the glass fiber downstream of the fiber amplifier.
Processing of the additional data in the intermediate repeaters requires a relatively large technical outlay.
A method for optical communication transmission is disclosed in DE 35 06 715 A1, by means of which data are transmitted in the opposite direction via an optical waveguide. Data of a high bit rate are transmitted in the one direction by means of an optically narrow-band carrier signal, for example a semiconductor laser, while data of a low bit rate are transmitted in the opposite direction by means of an optically wide band carrier signal, for example a luminescence diode (LED). The wavelengths of the narrow band and wide band carrier signals are located in an area with little dispersion of the optical waveguide.


SUMMARY OF THE INVENTION

It is the object of the invention to recite a transmitting station, an intermediate repeater and a receiving station for a communications-transmitting system of the type mentioned at the outset, which can be realized with the lowest possible outlay.
This object is attained in by a transmitting station for an optical communications-transmitting system with at least one intermediate repeater, which contains a first transmitter for transmitting useful data of a high bit rate by means of at least one optically narrow-band carrier signal, and a second transmitter for transmitting additional data of a low bit rate, wherein the useful data and the additional data are transmitted in the same direction, wherein in accordance with the invention the second transmitter is designed in such a way that the additional data of a low bit rate are transmitted over at least one optical wide-band carrier signal, and that the narrow-band and the wide-band carrier signals are located in the same wavelength range.
Besides useful data of a high bit rate and an optically narrow-band carrier signal, it is possible by means of the transmitting station, the intermediate repeater and the receiving station to transmit additional data of a low bit rate, for example for service purposes, within the amplifying bandwidth of an optical fiber amplifier. This is made possible by means of a wide-band optical carrier signal, whose spectral intensity is low in comparison to the optical narrow-band carrier signal of the useful data. Therefore the narrow-band and the wide-band carrier signals can be amplified together by means of the optical fiber amplifier. The service data required for operating th

REFERENCES:
patent: 4824201 (1989-04-01), Kazovsky
P.M.Gabla, J.Q.Frorud,E.Leclerc,S.Gauchard and V.Havard, IEEE Photonics Technology Letters, vol. 4, No. 7, Jul. 1992, New York US, pp. 717-720.
IEEE Global Telecommunications Conference&Exhibition, GLOBECOM '90, S.Matsuoka, et al, vol. 3, 2 Dec. 1990, San Diego, US, pp. 1846-1850.

Affiliated with

Also associated with

Rating

Transmission station, intermediate repeater and receiver station does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transmission station, intermediate repeater and receiver station, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmission station, intermediate repeater and receiver station will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1212154