Qiukun Zhang

TL;DR: In this article, a full-range complex spectral domain optical coherence tomography with an ultra-broadband light source based on sinusoidal modulation is presented, where a lead zirconate titanate stack actuator is employed to achieve the sinusoid vibration of a mirror and therefore to get a series of spectral interferogram with different phase delays.

TL;DR: In this article, the authors review the recent advances in nondestructive testing and evaluation (NDT&E) as applied to the inspection of thick composite parts and sandwich structures and determine possible research prospects to address the limitations of current technologies.

TL;DR: In this article, a non-projection fringe pattern and vision-based system was proposed to realize simultaneous measurement of the instantaneous rotational speed (IRS) and axial vibration of a rotating shaft.

TL;DR: It is shown that the aforementioned transmission capacity only varies by <23% over a RSOA-injected optical power variation range as large as 20dB, and that the 1 GHz RSOAs can support successful transmissions of adaptively modulated OOFDM signals having bandwidths of 8.5 GHz.

TL;DR: The proposed system can accurately measure the IAS and correctly track the wide range IRS with the advantage of noncontact and cost effective and could provide a novel vision-based approach for IRS measurement, especially when the conventional speed sensor cannot be installed on the rotary shaft.