JP3000788B2 - Optical fiber data link equipment for burst signal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber data link apparatus for burst signals.

[0002]

2. Description of the Related Art In a conventional optical fiber data link apparatus for burst signals, the circuit configuration of an optical receiver is a DC-coupled system, or the circuit configuration is an AC-coupled system to ensure a wide dynamic range and a DC regeneration function. Had. (For example, burst mode compatible optical
Receiver with Large Dynamic Range “Burst-Mode Compatible Op
physical Receiver with A Lar
ge Dynamic Range, "IEEE.J-
LT., Vol. 8, No. 12, pp1897-
1903, 1990).

[0003]

In this conventional optical fiber data link apparatus for burst signals, there is a problem that the dynamic range is narrowed when the circuit configuration of the optical receiver is a DC coupling system. There is a problem that the offset of each part must be emphasized.

An object of the present invention is to provide an optical fiber data link apparatus for a burst signal which can secure a wide dynamic range and does not need to adjust offsets of individual components.

[0005]

According to the present invention, a pulse generator for generating a periodic signal sufficiently slower than a burst signal, a burst signal is output when a burst signal is input, and no burst signal is input. In some cases, a signal switch that outputs a periodic signal from a pulse generator, an optical transmitter that sends an output signal from the signal switch to an optical fiber, and an optical receiver that receives a signal from the optical transmitter via the optical fiber And a signal discriminator that outputs only a burst signal out of the signals received by the optical receiver and blocks and does not output the periodic signal from the pulse generator.

Further, according to the present invention, the optical receiver is provided with A
It is preferable to use a GC amplifier configuration.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an optical fiber data link apparatus for burst signals according to the present invention. In FIG. 1, a signal input 1 is provided before the optical transmitter 4.
The pulse generator 2 is provided via a signal switch 3 having a signal switch 3, and a signal discriminator 7 having a signal output 8 is provided downstream of the optical receiver 6. The optical transmitter 4 and the optical receiver 6 are connected to each other via an optical fiber 5.

Next, the operation of this embodiment will be described.

An input signal from a signal input 1 and an output signal from a pulse generator 2 are input to a signal switch 3. When the burst signal is input to the signal input 1, the signal switch 3 passes the burst signal and outputs the burst signal. On the other hand, when the burst signal is not input to the signal input 1, the output signal of the pulse generator 2 is output.

The output signal of the signal switch 3 having the above configuration is
The signal is input to the signal discriminator 7 via the optical transmitter 4, the optical fiber 5, and the optical receiver 6 in order. The signal discriminator 7 has a signal input 1
Is passed through and output to the signal output 8. On the other hand, the output signal of the pulse generator 2 is cut off and not output to the signal output 8.

Here, in order to secure a wide dynamic range, the optical receiver 6 uses an AGC (Autm
atic gain control). The output signal of the pulse generator 2 is supplied to a signal discriminator 7.
In this case, the periodic signal is set to be a sufficiently low-speed periodic signal so as to be distinguished from the burst signal, and to be a signal within a range that can be followed by the AGC amplifier of the optical receiver 6.

Therefore, when the burst signal is not input to the signal input 1, the output signal from the pulse generator 2 is always input to the optical receiver 6, and the AGC amplifier of the optical receiver 6 operates stably. Therefore, even if a burst signal is input to the signal input 1, the optical receiver 6 can follow.

[0014]

As described above, according to the present invention, when a burst signal is not input, the periodic signal from the pulse generator is input to the optical receiver, so that it is necessary to adjust the offset of each component. In addition, the AGC amplifier has an AGC amplifier configuration that can secure a wide dynamic range, and has an effect that it can follow a burst signal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 signal input 2 pulse generator 3 signal switcher 4 optical transmitter 5 optical fiber 6 optical receiver 7 signal discriminator 8 signal output

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04B 10/00-10/28 H04L 25/38-27/233

Claims (2)

(57) [Claims] A pulse generator for generating a periodic signal sufficiently slower than a burst signal, a burst signal is output when a burst signal is input, and a cycle from the pulse generator is output when a burst signal is not input. A signal switch that outputs a signal, an optical transmitter that sends an output signal from the signal switch to an optical fiber, an optical receiver that receives a signal from the optical transmitter via the optical fiber, and an optical receiver that receives the signal. An optical fiber data link device for a burst signal, comprising: a signal discriminator that outputs only a burst signal among signals, and does not output a periodic signal from a pulse generator in a cut-off manner. 2. The optical fiber data link device for burst signals according to claim 1, wherein said optical receiver is constituted by an AGC amplifier.