scholarly journals Extended bandwidth wavelength swept laser source for high resolution optical frequency domain imaging

2017 ◽  
Vol 25 (7) ◽  
pp. 8255 ◽  
Author(s):  
Sahar Hosseinzadeh Kassani ◽  
Martin Villiger ◽  
Néstor Uribe-Patarroyo ◽  
Changsu Jun ◽  
Reza Khazaeinezhad ◽  
...  
Keyword(s):  
High Resolution ◽  
Frequency Domain ◽  
Laser Source ◽  
Optical Frequency ◽  
Optical Frequency Domain Imaging

In Vivo Optical Coherence Tomography: The Role of the Pathologist

2012 ◽  
Vol 136 (12) ◽  
pp. 1492-1501 ◽  
Author(s):  
Lida P. Hariri ◽  
Mari Mino-Kenudson ◽  
Eugene J. Mark ◽  
Melissa J. Suter
Keyword(s):  
Optical Coherence Tomography ◽  
High Resolution ◽  
Frequency Domain ◽  
Sampling Error ◽  
Imaging Modality ◽  
Imaging Techniques ◽  
Optical Frequency ◽  
Optical Coherence ◽  
Optical Frequency Domain Imaging

Optical coherence tomography (OCT) is a nondestructive, high-resolution imaging modality, providing cross-sectional, architectural images at near histologic resolutions, with penetration depths up to a few millimeters. Optical frequency domain imaging is a second-generation OCT technology that has equally high resolution with significantly increased image acquisition speeds and allows for large area, high-resolution tissue assessments. These features make OCT and optical frequency domain imaging ideal imaging techniques for surface and endoscopic imaging, specifically when tissue is unsafe to obtain and/or suffers from biopsy sampling error. This review focuses on the clinical impact of OCT in coronary, esophageal, and pulmonary imaging and the role of the pathologist in interpreting high-resolution OCT images as a complement to standard tissue pathology.

scholarly journals An Optical Frequency Domain Angle Measurement Method Based on Second Harmonic Generation

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 670
Author(s):  
Wijayanti Dwi Astuti ◽  
Hiraku Matsukuma ◽  
Masaru Nakao ◽  
Kuangyi Li ◽  
Yuki Shimizu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Second Harmonic Generation ◽  
Frequency Domain ◽  
Harmonic Generation ◽  
Measurement Method ◽  
Second Harmonic ◽  
Angle Measurement ◽  
Laser Source ◽  
Optical Frequency ◽  
Measurable Range

This paper proposes a new optical angle measurement method in the optical frequency domain based on second harmonic generation with a mode-locked femtosecond laser source by making use of the unique characteristic of the high peak power and wide spectral range of the femtosecond laser pulses. To get a wide measurable range of angle measurement, a theoretical calculation for several nonlinear optical crystals is performed. As a result, LiNbO3 crystal is employed in the proposed method. In the experiment, the validity of the use of a parabolic mirror is also demonstrated, where the chromatic aberration of the focusing beam caused the localization of second harmonic generation in our previous research. Moreover, an experimental demonstration is also carried out for the proposed angle measurement method. The measurable range of 10,000 arc-seconds is achieved.

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