Resolution improvement in optical coherence tomography by optimal synthesis of light-emitting diodes

Zhang, Yan; Sato, Manabu; Tanno, Naohiro

doi:10.1364/ol.26.000205

Cited by 55 publications

(25 citation statements)

References 9 publications

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“…For example, the depth resolution, as well as the spectrometric resolution of OCT is defined by the spectral width Δλ of the light source:

l_{c} = \frac{2 ln 2}{normalΠ} \frac{λ_{c}^{2}}{Δ λ}

where l c is the coherence length, λ c the mean wavelength and Δλ the spectral full‐width. It can be anticipated that the notable extension of emission bandwidth will lead to a great improvement in the imaging resolution . Moreover, it is well‐known that the penetration depth of bio‐imaging system is determined by the operation wavelength.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous control of the chemical state and local environment of Cr dopant in glass for extended emission

Chen

Luo

et al. 2017

J Am Ceram Soc

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Control of the chemical state and local environment of Cr dopant in glass through self-limited nanocrystallization is presented. Interesting wavelength-tunable and ultra-broadband near-infrared luminescence with the full width at half maximum of about 380 nm from obtained Cr-activated glass-ceramics are demonstrated. The results indicate that the presented method may be an effective means of fabricating multifunctional optical gain materials and wideband fiber light sources.

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“…For example, the depth resolution, as well as the spectrometric resolution of OCT is defined by the spectral width Δλ of the light source:

l_{c} = \frac{2 ln 2}{normalΠ} \frac{λ_{c}^{2}}{Δ λ}

Section: Resultsmentioning

confidence: 99%

Simultaneous control of the chemical state and local environment of Cr dopant in glass for extended emission

Chen

Luo

et al. 2017

J Am Ceram Soc

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“…A persistent challenge of applying spectral reshaping and bandwidth broadening techniques in realtime FOLCI is how to inhibit formation of sidelobes (ringing) in the interferometric signal due to the resultant non-Gaussian power spectrum [5,6]. Formation of sidelobes effectively degrades both the achievable axial resolution and the signal-to-noise ratio [7].…”

Section: Resultsmentioning

confidence: 99%

Use of Fibre Bragg Grating (FBG)technology to enhance axial resolution in Fibre Optic Low Coherence Interferometry (FOLCI)

Jonathan

2006

ACOFT/AOS 2006 - Australian Conference on Optical Fibre Technology/Australian Optical Society

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“…The second method is synthesis of source spectrum with cascading the LED's. [6] Each LED has a coherence length of about 10 µm. By cascading LED's with closely spaced center-wavelength, the bandwidth can be increased which effectively decreased the coherence length.…”

Section: Introductionmentioning

confidence: 99%

OCT resolution enhancement using long-period fiber grating and erbium-doped fiber

Choi

Kim

et al. 2003

SPIE Proceedings

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We proposed a technique to improve OCT resolution using LPG and EDF. The proposed technique improves the resolution of OCT by reshaping the spectrum of ASE source into Gaussian-like form. The ASE source has a strong characteristic peak due to erbium that is used for doping material in EDF. To reduce the peak-induced artifact to OCT image that may degrade image quality and distort inner structure information, LPG is used as a strong ASE peak rejection filter and EDF does a function of absorber when pumping power is not applied. Both of them can do spectral tailoring function properly so that modified source shape and sidelobe suppression can be performed. With the LPGassisted reshaping, we have enhanced the spatial resolution up to 5 times (~200 µm resolution was reduced to about 40 µm). With EDF absorber, we can obtain reshaped ASE source hence resolution was enhanced from 25 µm to less than 20 µm). The spatial resolution can be further enhanced by using cascaded LPGs or control of EDF parameters such as doping material, doping concentration, and the length of used EDF.

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Resolution improvement in optical coherence tomography by optimal synthesis of light-emitting diodes

Cited by 55 publications

References 9 publications

Simultaneous control of the chemical state and local environment of Cr dopant in glass for extended emission

Simultaneous control of the chemical state and local environment of Cr dopant in glass for extended emission

Use of Fibre Bragg Grating (FBG)technology to enhance axial resolution in Fibre Optic Low Coherence Interferometry (FOLCI)

OCT resolution enhancement using long-period fiber grating and erbium-doped fiber

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