초록 ▼

A polarized wave diversity optical receiver for coherent optical communication including: an optical local oscillating circuit (7) for oscillating local oscillating light; a mixing circuit (8) for mixing signal light and the local oscillating light to obtain two polarized components; a detecting cir

A polarized wave diversity optical receiver for coherent optical communication including: an optical local oscillating circuit (7) for oscillating local oscillating light; a mixing circuit (8) for mixing signal light and the local oscillating light to obtain two polarized components; a detecting circuit (9) for detecting the polarized component to output intermediate frequency signals (eS and eP); and a frequency control circuit (11) for controlling, in accordance with the intermediate frequency signals (eS and eP), the oscillating frequency of the optical local oscillating circuit (7). To ensure that the intermediate frequency does not disappear, the frequency control circuit (11) outputs a combined signal of a sum and a difference of the intermediate frequency signals (eS and eP).

대표청구항 ▼

A polarized wave diversity optical receiver for coherent optical communication, comprising: optical local oscillating means for oscillating local oscillating light; mixing means for mixing signal light transmitted through an optical fiber and the local oscillating light from said optical local oscil

A polarized wave diversity optical receiver for coherent optical communication, comprising: optical local oscillating means for oscillating local oscillating light; mixing means for mixing signal light transmitted through an optical fiber and the local oscillating light from said optical local oscillating means, to obtain first and second polarized component signals; detecting means for detecting the first and second polarized component signals from said mixing means to output first and second intermediate frequency signals; and frequency control means for controlling, in accordance with the first and second intermediate frequency signals from said detecting means, the oscillating frequency of said optical local oscillating means, said frequency control means comprising signal conversion means for obtaining an output control signal by combining a sum and a difference of the first and second intermediate frequency signals.