Patent ID: 9071365
Filing Date: 2015-06-30
Classification: H03F,H04B

Abstract:
1. An optical signal processing device comprising: a first optical signal generation unit that generates a first optical signal by causing a received optical signal and a local optical signal to interfere with each other with a first phase difference; a second optical signal generation unit that generates a second optical signal by causing the received optical signal and the local optical signal to interfere with each other with a second phase difference shifted by π from the first phase difference; a first photoelectric conversion element that converts the first optical signal into a first electrical signal; a second photoelectric conversion element that converts the second optical signal into a second electrical signal; a direct-current component correction unit that reduces a difference between a magnitude of a direct-current component of the first electrical signal and a magnitude of a direct-current component of the second electrical signal; and a differential trans-impedance circuit into which the first electrical signal and the second electrical signal, which have been corrected by the direct-current component correction unit, are input.