Huawei Technologies Co., Limited

Douglas Aguiar

Long Luo

Li Zeng

Yanbo Li

Andrea Ivano Melloni

Ruiqiang Ji

Francesco Morichetti

Sujie Zhou

Maziyar Milanizadeh

An ADD/DROP filter and an optical add/drop multiplexer are disclosed. An ADD/DROP filter includes an input port, an output port, an add port connecting to a modulator, and a drop port. The modulator is configured to load a pilot signal to a first optical signal to obtain a second optical signal, and transmit the second optical signal to the add port. A third optical signal is input to the input port. A wavelength difference between the second optical signal and the third optical signal is an integral multiple of a free spectral range. A power detector is connected to the output port and/or the drop port. The power detector is configured to obtain an output optical signal from the output port or the drop port and detect an optical power of the output optical signal.

Add/drop filter and optical add/drop multiplexer

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Milan, Italy

Douglas Aguiar