Akinetic all-semiconductor programmable swept-source at 1550 nm and 1310 nm with centimeters coherence length

Bonesi, Marco; Minneman, Michael; Ensher, Jason; Zabihian, Behrooz; Sattmann, Harald; Boschert, Paul; Hoover, Erich; Leitgeb, Rainer A.; Crawford, Michael E.; Drexler, Wolfgang

doi:10.1364/oe.22.002632

Cited by 122 publications

(68 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The measurement range is primarily limited by the k-clock frequency, and also by the coherence length of the wavelength sweeping light source. The former limitation can be resolved by using a high-frequency k-clock generator [28], and the latter can be resolved by using light sources with a more longer coherence length, such as akinetic light source [53] or VCSEL light source [54].…”

Section: Discussionmentioning

confidence: 99%

Three-dimensional multi-contrast imaging of in vivo human skin by Jones matrix optical coherence tomography

Makita

Hong

et al. 2017

Biomed. Opt. Express

View full text Add to dashboard Cite

A custom made dermatological Jones matrix optical coherence tomography (JM-OCT) is presented. It uses a passive-polarization-delay component based swept-source JM-OCT configuration, but is specially designed for in vivo human skin measurement. The center wavelength of its probe beam is 1310 nm and the A-line rate is 49.6 kHz. The JM-OCT is capable of simultaneously providing birefringence (local retardation) tomography, degree-ofpolarization-uniformity tomography, complex-correlation-based optical coherence angiography, and conventional scattering OCT. To evaluate the performance of this JM-OCT, we measured in vivo human skin at several locations. Using the four kinds of OCT contrasts, the morphological characteristics and optical properties of different skin types were visualized.

show abstract

Section: Discussionmentioning

confidence: 99%

Three-dimensional multi-contrast imaging of in vivo human skin by Jones matrix optical coherence tomography

Makita

Hong

et al. 2017

Biomed. Opt. Express

View full text Add to dashboard Cite

show abstract

“…For those phase-sensitive imaging applications, the repeatability of wavelength sweeping from frame to frame, i.e. the wavelength repeatability of the swept source, is very important for signal retrieval [10]. Among those conventional swept sources, an extra k-clock signal is usually required for regular recalibration, owing to their poor wavelength repeatability [11].…”

Section: Resultsmentioning

confidence: 99%

“…To give a quantitative analysis of the phase stability, we recorded a long train of real-time temporal interferogram. Specifically, 5000 consecutive temporal spectra were used to calculate the wavelength repeatability of BLISS by extracting the phases over the interferogram, equivalent to the auto-correlation of the wavelength-swept source [10]. The unwrapped phase of each interferogram was calculated and collected as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Conventionally, swept sources are implemented with active wavelength scanning mechanisms, either mechanical or electrical tuning [7][8][9][10]. The sweep rate based on those methods, however, is largely limited to the kHz range, which is order of magnitude slower than the MHz regime required by ultrafast phenomena studies or high-throughput screening applications.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

28 MHz swept source at 10 μm for ultrafast quantitative phase imaging

Wei¹,

Lau²,

Xu³

et al. 2015

Biomed. Opt. Express

View full text Add to dashboard Cite

Emerging high-throughput optical imaging modalities, in particular those providing phase information, necessitate a demanding speed regime (e.g. megahertz sweep rate) for those conventional swept sources; while an effective solution is yet to be demonstrated. We demonstrate a stable breathing laser as inertia-free swept source (BLISS) operating at a wavelength sweep rate of 28 MHz, particularly for the ultrafast interferometric imaging modality at 1.0 μm. Leveraging a tunable dispersion compensation element inside the laser cavity, the wavelength sweep range of BLISS can be tuned from ~10 nm to ~63 nm. It exhibits a good intensity stability, which is quantified by the ratio of standard deviation to the mean of the pulse intensity, i.e. 1.6%. Its excellent wavelength repeatability, <0.05% per sweep, enables the single-shot imaging at an ultrafast line-scan rate without averaging. To showcase its potential applications, it is applied to the ultrafast (28-MHz line-scan rate) interferometric time-stretch (iTS) microscope to provide quantitative morphological information on a biological specimen at a lateral resolution of 1.2 μm. This fiber-based inertia-free swept source is demonstrated to be robust and broadband, and can be applied to other established imaging modalities, such as optical coherence tomography (OCT), of which an axial resolution better than 12 μm can be achieved. Y. Wong, and K. K. Tsia, "Interferometric time-stretch microscopy for ultrafast quantitative cellular and tissue imaging at 1 μm," J.

show abstract

“…New tunable vertical-cavity surface emitting lasers (VCSEL) and akinetic light sources, can provide axial ranges exceeding 1 cm [1][2]. However, both VCSELs and akinetic sources are more expensive than the conventional microelectromechanical systems (MEMS) based swept sources widely available.…”

Section: Introductionmentioning

confidence: 99%

Long axial imaging range using conventional swept source lasers in optical coherence tomography via re-circulation loops

Bradu

Jackson

Podoleanu

2018

2nd Canterbury Conference on OCT With Emphasis on Broadband Optical Sources

View full text Add to dashboard Cite

Typically, swept source optical coherence tomography (SS-OCT) imaging instruments are capable of a longer axial range than their camera based (CB) counterpart. However, there are still various applications that would take advantage for an extended axial range. In this paper, we propose an interferometer configuration that can be used to extend the axial range of the OCT instruments equipped with conventional swept-source lasers up to a few cm. In this configuration, the two arms of the interferometer are equipped with adjustable optical path length rings. The use of semiconductor optical amplifiers in the two rings allows for compensating optical losses hence, multiple paths depth reflectivity profiles (Ascans) can be combined axially. In this way, extremely long overall axial ranges are possible. The use of the recirculation loops produces an effect equivalent to that of extending the coherence length of the swept source laser. Using this approach, the achievable axial imaging range in SS-OCT can reach values well beyond the limit imposed by the coherence length of the laser, to exceed in principle many centimeters. In the present work, we demonstrate axial ranges exceeding 4 cm using a commercial swept source laser and reaching 6 cm using an "in-house" swept source laser. When used in a conventional set-up alone, both these lasers can provide less than a few mm axial range.

show abstract

Akinetic all-semiconductor programmable swept-source at 1550 nm and 1310 nm with centimeters coherence length

Cited by 122 publications

References 13 publications

Three-dimensional multi-contrast imaging of in vivo human skin by Jones matrix optical coherence tomography

Three-dimensional multi-contrast imaging of in vivo human skin by Jones matrix optical coherence tomography

28 MHz swept source at 10 μm for ultrafast quantitative phase imaging

Long axial imaging range using conventional swept source lasers in optical coherence tomography via re-circulation loops

Contact Info

Product

Resources

About