Fourier domain mode-locked lasers for swept source OCT imaging at up to 290 kHz scan rates

2006 ◽  
Author(s):  
R. Huber ◽  
K. Taira ◽  
M. Wojtkowski ◽  
J. G. Fujimoto
Keyword(s):  
Fourier Domain ◽  
Swept Source ◽  
Swept Source Oct ◽  
Oct Imaging ◽  
Mode Locked Lasers

Swept-Source OCT System Based on a Polarization-Dependent Semiconductor Optical Amplifier-Enabled Fourier Domain Mode Locked Laser

2013 ◽  
Vol 710 ◽  
pp. 447-451
Author(s):  
Huai Ying Shang ◽  
Li Huo ◽  
Yuan Peng Wu ◽  
Cai Yun Lou
Keyword(s):  
Output Power ◽  
Semiconductor Optical Amplifier ◽  
Optical Amplifier ◽  
Spot Size ◽  
Fourier Domain ◽  
Swept Source ◽  
Saturation Power ◽  
Swept Source Oct ◽  
Oct Imaging ◽  
Mode Locked Laser

We demonstrate a swept-source OCT system based on a polorization-dependent semiconductor optical amplifier (SOA)-enabled Fourier Domain Mode Locked laser (FDML). The broad bandwidth and high saturation power of the semiconductor optical amplifier enables single semiconductor optical amplifier operation with enough bandwidth and output power. The FDML generates ~32mW output power at 45kHz sweep rates, with a tuning range of 115 nm centered at 1326 nm. Using the SOA-enabled FDML laser, ~12.9μm axial resolution,9μm transverse spot size and 105dB sensitivity are achieved. OCT imaging of biological sample is also demonstrated.

scholarly journals Feasibility of peripheral OCT imaging using a novel integrated SLO ultra-widefield imaging swept-source OCT device

2021 ◽  
Author(s):  
Simrat K. Sodhi ◽  
John Golding ◽  
Carmelina Trimboli ◽  
Netan Choudhry
Keyword(s):  
Posterior Pole ◽  
Field Of View ◽  
Retinal Diseases ◽  
Swept Source ◽  
Full Field ◽  
Swept Source Oct ◽  
Oct Imaging ◽  
Field Device ◽  
Areas Of Interest ◽  
Retinal Pathologies

Abstract Purpose To describe the feasibility of peripheral OCT imaging in retinal diseases using a novel full-field device. Methods A total of 134 consecutive eyes were referred and imaged on the Optos Silverstone swept-source OCT (SS-OCT) (Optos PLC; Dunfermline, UK). Scanning laser ophthalmoscope (SLO) images and the associated SS-OCT images were obtained in the posterior pole, mid-periphery or far periphery based on the nature of the referral and on new areas of interest observed in the optomap images at the time of imaging. Results A total of 134 eyes (96 patients) were enrolled in the study. One hundred and twenty-five eyes (91 patients) with 38 retinal pathologies were prospectively assessed and 9 eyes (5 patients) were excluded due to incomplete image acquisition. The average age of the subjects was 54 years (range 21–92 years). Thirty-nine out of 125 eyes (31%) had macular pathologies. Eighty-six out of 125 eyes (69%) had peripheral only pathologies, an area which cannot be visualized by standard OCT devices with a 50 degree field-of-view. Conclusions The ability to capture peripheral pathologies using an integrated SLO-UWF imaging with full-field swept-source provided high-grade anatomical insight that confirmed the medical and surgical management in a majority of cases. Its use in the mid- and far periphery provides a holistic clinical picture, which can potentially aid in the understanding of various retinal pathologies.

scholarly journals Is Optical Coherence Tomography a Useful Tool to Objectively Detect Actual Posterior Vitreous Adhesion Status?

2016 ◽  
Vol 2016 ◽  
pp. 1-5
Author(s):  
Thomas Bertelmann ◽  
Christina Goos ◽  
Walter Sekundo ◽  
Stephan Schulze ◽  
Stefan Mennel
Keyword(s):  
Case Report ◽  
Posterior Vitreous Detachment ◽  
Objective Method ◽  
Review Of The Literature ◽  
Swept Source ◽  
Vitreous Cortex ◽  
Bursa Premacularis ◽  
Swept Source Oct ◽  
Oct Imaging ◽  
Posterior Vitreous Cortex

Purpose. To objectively detect true posterior vitreous cortex (PVC) adhesion status using a commercially available swept-source OCT device (DRI OCT-1, Atlantis©). Material and Methods. Case report, review of the literature, and methodical discussion of concepts to improve OCT-guided PVC imaging. Results. Standard OCT imaging misdiagnosed PVC adhesion status as totally detached in this case report when using a horizontal 6 mm scan only. Contrariwise imaging the same eye with a 12 mm horizontal scan, partial posterior vitreous detachment (PVD) and the presence of a bursa premacularis were clearly discernible. Besides a broader scan, specific scan patterns, highest resolution, and contrast sensitivity, an anterior-to-posterior adjusted scan through the entire vitreous as well as the detection of characteristic undulating aftermovements might enhance the capability of OCT imaging to detect true PVC adhesion status. Conclusions. Further developments are needed to address these issues and to establish OCT recordings as the standard and objective method of choice in PVC adhesion status imaging.

Correlations between Choriocapillaris Flow Deficits around Geographic Atrophy and Enlargement Rates Based on Swept-Source OCT Imaging

2019 ◽  
Vol 3 (6) ◽  
pp. 478-488 ◽  
Author(s):  
Marie Thulliez ◽  
Qinqin Zhang ◽  
Yingying Shi ◽  
Hao Zhou ◽  
Zhongdi Chu ◽  
...  
Keyword(s):  
Geographic Atrophy ◽  
Swept Source ◽  
Swept Source Oct ◽  
Oct Imaging

Swept-Source OCT Imaging of the Argus II Epiretinal Prosthesis

2018 ◽  
Vol 2 (4) ◽  
pp. 380-382 ◽  
Author(s):  
Marianeli Rodriguez ◽  
Ninel Z. Gregori ◽  
Luiz Roisman ◽  
Byron L. Lam ◽  
Philip J. Rosenfeld
Keyword(s):  
Swept Source ◽  
Swept Source Oct ◽  
Argus Ii ◽  
Oct Imaging ◽  
Epiretinal Prosthesis

scholarly journals Broadband Wavelength-swept Raman Laser for Fourier-domain Mode Locked Swept-source OCT

2009 ◽  
Vol 13 (3) ◽  
pp. 316-320 ◽  
Author(s):  
Hyung-Seok Lee ◽  
Eun-Joo Jung ◽  
Myung-Yung Jeong ◽  
Chang-Seok Kim
Keyword(s):  
Raman Laser ◽  
Fourier Domain ◽  
Swept Source ◽  
Swept Source Oct

scholarly journals Spectral-Domain and Swept-Source OCT Imaging of Asteroid Hyalosis: A Case Report

2014 ◽  
Vol 45 (5) ◽  
pp. 459-461 ◽  
Author(s):  
Tarek Alasil ◽  
Mehreen Adhi ◽  
Jonathan J. Liu ◽  
James G. Fujimoto ◽  
Jay S. Duker ◽  
...  
Keyword(s):  
Case Report ◽  
Spectral Domain ◽  
Swept Source ◽  
Asteroid Hyalosis ◽  
Swept Source Oct ◽  
Oct Imaging

Fourier domain mode locked lasers for OCT imaging at up to 290 kHz sweep rates

2005 ◽  
Author(s):  
R. Huber ◽  
K. Taira ◽  
M. Wojtkowski ◽  
J. G. Fujimoto
Keyword(s):  
Fourier Domain ◽  
Oct Imaging ◽  
Mode Locked Lasers

scholarly journals Polarization sensitive optical coherence tomography utilizing a buffered swept source laser

2017 ◽  
Vol 3 (2) ◽  
pp. 227-230
Author(s):  
Jonas Golde ◽  
Lars Kirsten ◽  
Edmund Koch
Keyword(s):  
Optical Coherence Tomography ◽  
High Speed ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Fourier Domain ◽  
Optical Coherence ◽  
Swept Source ◽  
Finger Nail ◽  
Swept Source Oct ◽  
Human Finger

AbstractWe present an approach for polarization sensitive optical coherence tomography (PS-OCT) that solely requires a modification of the light source, a buffered swept source laser. For this purpose a single-mode fiber-based Fourier domain mode locked laser is extended by fourfold buffering with manual fiber polarization controllers to emit alternating sweep polarizations, while the polarization contrast calibration is realized by a high-speed polarimeter. As the introduced setup utilizes standard scanning and detection units, the proposed method is a promising way to enhance various swept source OCT systems by polarization sensitive imaging. Preliminary measurements of a human finger nail with different polarization contrasts demonstrate the feasibility of the concept.

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