1. Demodulators for optical fiber interferometers with [3×3] outputs;Keolian;United States Patent, Patent number,1994
2. Displacement response, detection limit, and dynamic range of fiber-optic lever sensors
3. Digital demodulation scheme based on 3×3 coupler fiber optic hydrophone;Chen;Chinese Journal Of Scientific Instrument. Papers,2008
4. Optical intensity compensation method of optical fiber hydrophone time division multiplexing system based on 3×3 coupler;Zhang;Chinese Journal Of Lasers. Papers,2011
5. Direct least square fitting of ellipses