APPAREIL ET PROCÉDÉ DE DÉTECTION DE PUISSANCE OPTIQUE ET DE GAIN POUR AMPLIFICATEUR OPTIQUE EN MODE RAFALE

摘要

Provided are an optical power and gain detection apparatus and method for an optical amplifier in a burst mode, comprising: multiple optical power detection circuits, an FPGA device, and a temperature detection circuit. Various optical power detection circuit all use the same structure and implementation method, and all comprise a respective independent photoelectric converter, a trans-impedance amplifier, an analog signal conditioning circuit, a filter and an analog-digital conversion chip. By improving an analog circuit, digital detection and control in a conventional optical amplifier, the present invention uses the property of the FPGA device to realize, via an algorithm, the detection of optical signal and gain in a burst mode, avoids increasing complicated analogue circuits, and at the same time also avoids the influence caused by element inconsistency in an analogue control solution. No matter whether the optical signal is in a stable mode or in a burst mode, the algorithm can detect the optical power accurately and stably, with a wide application range. By strictly controlling the synchronism of ADC sampling and the delay of calculation, the present invention calculates the amplifier gain more accurately.