We　present　a　full-range　complex　spectral　domain　optical　coherence　tomography　with　an　ultra-broadband　light　source　based　on　sinusoidal　modulation.　For　the　sinusoidal　modulation　strategy,　a　lead　zirconate　titanate　stack　actuator　is　employed　to　achieve　the　sinusoidal　vibration　of　a　mirror　and　therefore　to　get　a　series　of　spectral　interferogram　with　different　phase　delays.　The　purpose　of　this　strategy　is　to　get　higher　performance　complex-conjugate　artifact　elimination.　Bessel　separation　of　the　signal　sequence　at　each　wavelength　of　the　spectrometer　was　used　to　reconstruct　the　real　and　imaginary　components　of　interference　fringes;　however,　the　sinusoidal　modulation　method　is　independent　of　light　source　wavelength.　The　experimental　results　demonstrated　that　the　method　had　an　excellent　performance　in　a　complex-conjugate　suppression　of　50dB　for　a　full　width　at　half　maximum　bandwidth　of　236　nm,　and　it　has　better　anti-artifact　ability　and　more　flexible　range　in　phase　shifting　than　the　conventional　wavelength-dependent　phase-shifting　method　on　a　full-range　complex　spectral　optical　coherence　tomography　system.　Furthermore,　the　effect　of　the　hysteresis　error　of　lead　zirconate　titanate　actuators　on　the　performance　of　complex-conjugate　artifact　elimination　was　investigated　and　the　solution　of　lead　zirconate　titanate　positioning　performance　for　both　conventional　phase-shifting　and　sine-modulation　methods　was　suggested.　©　The　Author(s)　2015.