We have demonstrated more sensitive monitoring of modulator bias point with two-photon-absorption in Si-APD. For NRZ, RZ and CS-RZ signals, the sensitivity with TPA monitoring is at least double of that with power monitoring.
© 2006 Optical Society of America
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.4080) Fiber optics and optical communications : Modulation
C. Tian and T. Naito, " Optical Modulator Bias Monitoring with Two-Photon-Absorption in Si-APD in Advanced Modulation Formats Optical Transmitters," in Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference, Technical Digest (CD) (Optical Society of America, 2006), paper OWI81.