Swept source optical coherence tomography using an all-fiber 1300-nm ring laser source

2005 ◽  
Vol 10 (4) ◽  
pp. 044009 ◽  
Author(s):  
Michael A. Choma ◽  
Kevin Hsu ◽  
Joseph A. Izatt
Keyword(s):  
Optical Coherence Tomography ◽  
Ring Laser ◽  
Laser Source ◽  
Optical Coherence ◽  
Swept Source

Dual core ytterbium doped fiber ring laser in Fourier domain mode locked operation for swept-source optical coherence tomography

2010 ◽  
Author(s):  
Mark K. Harduar ◽  
Adrian Mariampillai ◽  
Barry Vuong ◽  
Kyle H. Y. Cheng ◽  
Lawrence R. Chen ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Ring Laser ◽  
Fourier Domain ◽  
Optical Coherence ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Swept Source ◽  
Dual Core

scholarly journals Choroidal Imaging with Swept Source Optical Coherence Tomography – A Review

2014 ◽  
Vol 08 (02) ◽  
pp. 132 ◽  
Author(s):  
Katarzyna Piasecka ◽  
Zofia Michalewska ◽  
◽  
◽  
Keyword(s):  
Optical Coherence Tomography ◽  
Vascular Tissue ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Tunable Laser ◽  
Laser Source ◽  
Optical Coherence ◽  
Swept Source ◽  
Spectral Domain Oct ◽  
And Function

The choroid provides up to 70 % of blood and oxygen to the eye. Pathological changes of this vascular tissue may lead to malnutrition of the retina and therefore be involved in the pathogenesis of numerous retinal disorders. Swept source optical coherence tomography (SS-OCT) is a new development of a non-invasive imaging technique that uses a tunable laser source with a higher wavelength light than conventional spectral domain OCT (SD-OCT). This enables visualisation of tissues below the retinal pigment epithelium. Thanks to SS-OCT’s ultrahigh speed and ultrahigh resolution it is possible to assess choroidal layers as well as to automatically create 3D maps of its thickness and volume. This review is to discuss how SS-OCT has improved our understanding of choroidal anatomy and function in various retinal and chorioretinal diseases. In future, detailed evaluation of choroid may play a crucial role in the diagnosis and management of various retinal diseases.

scholarly journals Developments in Contact Lens Imaging: New Applications of Optical Coherence Tomography

2019 ◽  
Vol 9 (13) ◽  
pp. 2580
Author(s):  
Joanna Stachura ◽  
Małgorzata Seredyka-Burduk ◽  
Ilona Piotrowiak-Słupska ◽  
Magdalena Kaszuba-Modrzejewska ◽  
Jagoda Rzeszewska-Zamiara ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Contact Lens ◽  
High Speed ◽  
Contact Lenses ◽  
Tear Film ◽  
Laser Source ◽  
Optical Coherence ◽  
Cross Sectional ◽  
Swept Source ◽  
Swept Source Oct

Optical coherence tomography (OCT) is a high-speed and non-contact optical imaging technology widely used for noninvasive cross-sectional imaging of biological objects. Two main OCT technologies have been developed: time domain and Fourier domain technologies. The latter can be further divided into spectral domain OCT, which uses a broadband light source and a spectrometer as a detector, and swept source OCT, which employs a quickly-rotating laser source. Advances in OCT technology have made it one of the most helpful devices in ophthalmic practice. Fourier OCT has revolutionized imaging of the posterior segment of the eye, as well as of anterior structures and has enhanced the ability to diagnose and manage patients. It provides high-resolution information about the tear film, contact lens (CL), a qualitative and quantitative assessment of the anterior eye that is important in contact lens fitting, and allows possible eye surface changes while wearing contact lenses to be monitored. Potential swept source OCT technology applications include industrial processes of lens design and quality control. In this paper, we describe clinical applications and outline a variety of multifunctional uses of OCT in the field of refractive error correction with contact lenses.

DEVELOPMENT OF HIGH-SPEED SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY SYSTEM AT 1320 nm

2009 ◽  
Vol 02 (01) ◽  
pp. 117-122 ◽  
Author(s):  
TONG WU ◽  
ZHIHUA DING ◽  
MINGHUI CHEN ◽  
LEI XU ◽  
GUOHUA SHI ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
High Speed ◽  
Calibration Method ◽  
Wave Number ◽  
Laser Source ◽  
Depth Range ◽  
Optical Coherence ◽  
Swept Source ◽  
Human Finger

A swept-source optical coherence tomography (SSOCT) system based on a high-speed scanning laser source at center wavelength of 1320 nm and scanning rate of 20 kHz is developed. The axial resolution is enhanced to 8.3 μm by reshaping the spectrum in frequency domain using a window function and a wave number calibration method based on a Mach-Zender Interferometer (MZI) integrated in the SSOCT system. The imaging speed and depth range are 0.04 s per frame and 3.9 mm, respectively. The peak sensitivity of the SSOCT system is calibrated to be 112 dB. With the developed SSOCT system, optical coherence tomography (OCT) images of human finger tissue are obtained which enable us to view the sweat duct (SD), stratum corneum (SC) and epidermis (ED), demonstrating the feasibility of the SSOCT system for in vivo biomedical imaging.

scholarly journals Laser Lens Size Measurement Using Swept-Source Optical Coherence Tomography

2020 ◽  
Vol 10 (14) ◽  
pp. 4936
Author(s):  
Pingping Jia ◽  
Hong Zhao ◽  
Yuwei Qin
Keyword(s):  
Optical Coherence Tomography ◽  
High Speed ◽  
Wave Number ◽  
Radius Of Curvature ◽  
Optical Coherence ◽  
Swept Source ◽  
Laser Focusing ◽  
Fitting Algorithm ◽  
Laser Confocal Microscope ◽  
Focusing Lens

A high-speed, high-resolution swept-source optical coherence tomography (SS-OCT) is presented for focusing lens imaging and a k-domain uniform algorithm is adopted to find the wave number phase equalization. The radius of curvature of the laser focusing lens was obtained using a curve-fitting algorithm. The experimental results demonstrate that the measuring accuracy of the proposed SS-OCT system is higher than the laser confocal microscope. The SS-OCT system has great potential for surface topography measurement and defect inspection of the focusing lens.

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