Effect of mains interference on time coherent averaging

1992 ◽  
Vol 30 (5) ◽  
pp. 491-494 ◽  
Author(s):  
J. Strackee ◽  
A. Peper
Keyword(s):  
Coherent Averaging ◽  
Mains Interference

Coherent averaging

2015 ◽  
Vol 527 (9-10) ◽  
pp. 701-712 ◽  
Author(s):  
Julien Mathieu Elias Fraïsse ◽  
Daniel Braun
Keyword(s):  
Coherent Averaging

Dynamic Levkov-Christov subtraction of mains interference

1995 ◽  
Vol 33 (3) ◽  
pp. 360-360 ◽  
Author(s):  
I. Dotsinksy ◽  
I. Daskalov
Keyword(s):  
Mains Interference

scholarly journals Phase stable swept-source optical coherence tomography with active mode-locking laser for contrast enhancements of retinal angiography

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kwan Seob Park ◽  
Eunwoo Park ◽  
Hwidon Lee ◽  
Hyun-Ji Lee ◽  
Sang-Won Lee ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Phase Stability ◽  
Averaging Method ◽  
Mode Locking ◽  
Optical Coherence ◽  
Swept Source ◽  
Active Mode ◽  
Coherent Averaging ◽  
Noise Ratio ◽  
High Phase

AbstractSwept-source optical coherence tomography (SS-OCT) is an attractive high-speed imaging technique for retinal angiography. However, conventional swept lasers vary the cavity length of the laser mechanically to tune the output wavelength. This causes sweep-timing jitter and hence low phase stability in OCT angiography. Here, we improve an earlier phase-stabilized, akinetic, SS-OCT angiography (OCTA) method by introducing coherent averaging. We develop an active mode-locking (AML) laser as a high phase-stable akinetic swept source for the OCTA system. The phase stability of the improved system was analyzed, and the effects of coherent averaging were validated using a retina phantom. The effectiveness of the coherent averaging method was further confirmed by comparing coherently and conventionally averaged en face images of human retinal vasculature for their contrast-to-noise ratio, signal-to-noise ratio, and vasculature connectivity. The contrast-to-noise ratio was approximately 1.3 times larger when applying the coherent averaging method in the human retinal experiment. Our coherent averaging method with the high phase-stability AML laser source for OCTA provides a valuable tool for studying healthy and diseased retinas.

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