CNC laser cutting machine

CNC laser cutting machine when signals into optical fiber amplifier, the output includes a lot as a 1549 - nm ( Highly amplified the input signal) Signals in the ear. On account of strange part around the seen in the 1549 nm peak output low background noise. The incoming signal amplifier amplified spontaneous sharply reduce emissions ( In this case more than 9 dB noise output of the amplifier; Amplitude scale CNC laser cutting machine, allowing the comparison of two output is the same) 。 When the amplified signal ( In this example of cuhk signals, is essentially a saturated amplifier) , discharge, in the absence of signal, the spontaneity of erbium atoms excited state be coaxed to launch coherent light; That is to say, CNC laser cutting machine coherent light stimulate emissions before they have a chance to emit light spontaneously, thus reduce the rate of spontaneous radiation. This stimulated emission process ( The key process of this kind of operational amplifier work) Lead to coherent light atoms. Erbium, responsible for here, a high level of species in laser amplification, CNC laser cutting machine long process of spontaneous radiation give life stimulated emission of radiation occur spontaneous radiation before the good chance.