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Registered APPRATUS AND METHOD FOR MEASURING IQ IMBALANCE FOR OPTICAL RECEIVER
- Inventors
- Youn Chun Ju, Kim Duk Jun, Kwon Yong-Hwan, Choe Joong-Seon, Eun Soo Nam, Jong-Hoi Kim
- Application No.
- 14027445 (2013.09.16)
- Publication No.
- 20140169786 (2014.06.19)
- Registration No.
- 9166680 (2015.10.20)
- Country
- UNITED STATES
- Project Code
- 11PB1100, Coherent optical OFDM technologies for mext generation optical transport networks, Eun Soo Nam
- Abstract
- Provided is an apparatus and method for measuring IQ imbalance, and in particular, is an apparatus and method for measuring IQ imbalance for an optical receiver. The apparatus for measuring IQ imbalance for an optical receiver includes a light generating unit generating optical and reference signals to provide the optical and reference signals to an optical receiver, a graph creating unit creating a Lissajous figure by using an in-phase (I) signal and a quadrature-phase (Q) signal output from the optical receiver in response to the optical and reference signals, and a calculating unit calculating IQ imbalance for the optical receiver with reference to the Lissajous figure.
- KSP Keywords
- IQ imbalance, In-phase, Lissajous figure, Optical receiver, generating unit