두 개의 광검출소자를 이용한 쿼드러쳐 호모다인 검출기 (Quadrature homodyne detecter by using 2 photo detecters)

판매 대리인 : 기율특허

전화번호 : 02-782-1004

메일주소 : kiyul@kiyul.co.kr

영문 원어  : The present invention relates to a quadrature homodyne detector using two photodetection devices. The homodyne detector comprises: a beam splitter receiving an interference signal from a homodyne interferometer, dividing a received interference signal into first and second signals and then reflecting and outputting the first signal, and passing and outputting the second signal; a first optical device part located on an optical axis of the first signal, outputting a first polarized component of the first signal; a second photodetection device detecting an optical signal for the first polarized component, and then converting the signal into an electric signal to output a first output signal; a second optical part located on an optical axis of the second signal, outputting a first polarized component of the second signal having a phase delay; and a second photodetection device detecting an optical signal for the first polarized component of the second signal, having the phase delay, and converting the signal into an electric signal to output a second output signal. The first and second signals have a 90° phase difference from each other.