Hybrid optical fiber amplifier as well as method and device for adjusting gain and gain slope of amplifier
An amplifier gain, hybrid fiber technology, applied in the field of optical communication, can solve the problems of inability to achieve amplification effect, large EDFA noise index, and no unified control.
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Embodiment 1
[0022] figure 1 A structural diagram of the hybrid fiber amplifier provided by the first embodiment of the present invention is shown, and only parts related to the embodiment of the present invention are shown for convenience of description.
[0023] The hybrid fiber amplifier provided by the embodiment of the present invention includes: a Raman fiber amplifier 1 and an erbium-doped fiber amplifier 2 that does not contain a variable attenuator, and the Raman fiber amplifier 1 includes a pump signal combiner 11, and the pump The pump laser group 12 connected to the reflection end of the pump signal multiplexer 11, the out-of-band narrow-band filter 13 connected to the output end of the pump signal multiplexer 11, and the out-of-band narrow-band filter 13 connected to the transmission end of the out-of-band narrow-band filter 13 Photodetector 14, described erbium-doped fiber amplifier 2 comprises input coupler 21, erbium-doped optical fiber 22, output coupler 23 connected in se...
Embodiment 2
[0029] The embodiment of the present invention provides a method for adjusting the gain and gain slope of a hybrid fiber amplifier. As shown in Embodiment 1, the hybrid fiber amplifier includes a Raman fiber amplifier and an erbium-doped fiber amplifier that does not contain a variable attenuator. The adjustment method provided in this embodiment includes the following steps:
[0030] Step S201, adjusting the gain G of the Raman fiber amplifier according to the expected amplification requirements R , gain slope T R and / or adjust the gain G of the erbium-doped fiber amplifier E , gain slope T E , to achieve, to adjust the overall gain G of the hybrid fiber amplifierH and / or total gain slope T H .
[0031] In this step, the total gain G of the hybrid fiber amplifier H is Raman fiber amplifier gain G R with erbium-doped fiber amplifier gain G E sum, the total gain slope of the hybrid fiber amplifier T H is the gain slope T of the Laraman fiber amplifier R with Erbium-dop...
Embodiment 3
[0037] In this embodiment, the expected amplification requirement is the overall gain slope T of the hybrid fiber amplifier H Adjust the overall gain G without changing H .
[0038] In this embodiment, adjust the erbium-doped fiber amplifier gain G E , Raman fiber amplifier gain G R keep constant while adjusting the Raman fiber amplifier gain slope T R to compensate for the erbium-doped fiber amplifier gain G E The change in gain slope caused by the change.
[0039] For example, it is necessary to adjust the total gain G of the hybrid amplifier H From 28dB to 30dB gain change, the overall gain slope of the hybrid amplifier T H Keep 0 unchanged, such as image 3 shown, given by adjusting the EDFA gain G E with RFA gain slope T R Schematic diagram of realizing the gain change of the hybrid fiber amplifier. In the illustration, the EDFA gain G in the initial state E 18dB, the gain slope T E is 0, RFA gain G R 10dB, the gain slope T R is 0, in order to achieve the tot...
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