Megahertz FDML laser with up to 143nm sweep range for ultrahigh resolution OCT at 1050nm

Jan Philip Kolb; Thomas Klein; Matthias Eibl; Tom Pfeiffer; Wolfgang Wieser; Robert Huber

doi:10.1117/12.2214758

Megahertz FDML laser with up to 143nm sweep range for ultrahigh resolution OCT at 1050nm

Jan Philip Kolb, Thomas Klein, Matthias Eibl, Tom Pfeiffer, Wolfgang Wieser, Robert Huber

Institute of Biomedical Optics

Abstract

We present a new design of a Fourier Domain Mode Locked laser (FDML laser), which provides a new record in sweep range at ∼1μm center wavelength: At the fundamental sweep rate of 2x417 kHz we reach 143nm bandwidth and 120nm with 4x buffering at 1.67MHz sweep rate. The latter configuration of our system is characterized: The FWHM of the point spread function (PSF) of a mirror is 5.6μm (in tissue). Human in vivo retinal imaging is performed with the MHz laser showing more details in vascular structures. Here we could measure an axial resolution of 6.0Î1/4m by determining the FWHM of specular reflex in the image. Additionally, challenges related to such a high sweep bandwidth such as water absorption are investigated.

Original language	English
Title of host publication	Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XX
Volume	VOLUME 9697
Publication date	08.03.2016
DOIs	https://doi.org/10.1117/12.2214758
Publication status	Published - 08.03.2016
Event	SPIE BIOS: Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XX - San Francisco, United States Duration: 13.02.2016 → 18.02.2016 https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9697.toc https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9697.toc

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title = "Megahertz FDML laser with up to 143nm sweep range for ultrahigh resolution OCT at 1050nm",

abstract = "We present a new design of a Fourier Domain Mode Locked laser (FDML laser), which provides a new record in sweep range at ∼1μm center wavelength: At the fundamental sweep rate of 2x417 kHz we reach 143nm bandwidth and 120nm with 4x buffering at 1.67MHz sweep rate. The latter configuration of our system is characterized: The FWHM of the point spread function (PSF) of a mirror is 5.6μm (in tissue). Human in vivo retinal imaging is performed with the MHz laser showing more details in vascular structures. Here we could measure an axial resolution of 6.0{\^I}1/4m by determining the FWHM of specular reflex in the image. Additionally, challenges related to such a high sweep bandwidth such as water absorption are investigated.",

author = "Kolb, {Jan Philip} and Thomas Klein and Matthias Eibl and Tom Pfeiffer and Wolfgang Wieser and Robert Huber",

year = "2016",

month = mar,

day = "8",

doi = "10.1117/12.2214758",

language = "English",

volume = "VOLUME 9697 ",

booktitle = "Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XX",

note = "SPIE BIOS : Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XX ; Conference date: 13-02-2016 Through 18-02-2016",

url = "https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9697.toc, https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9697.toc",

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TY - GEN

T1 - Megahertz FDML laser with up to 143nm sweep range for ultrahigh resolution OCT at 1050nm

AU - Kolb, Jan Philip

AU - Klein, Thomas

AU - Eibl, Matthias

AU - Pfeiffer, Tom

AU - Wieser, Wolfgang

AU - Huber, Robert

PY - 2016/3/8

Y1 - 2016/3/8

N2 - We present a new design of a Fourier Domain Mode Locked laser (FDML laser), which provides a new record in sweep range at ∼1μm center wavelength: At the fundamental sweep rate of 2x417 kHz we reach 143nm bandwidth and 120nm with 4x buffering at 1.67MHz sweep rate. The latter configuration of our system is characterized: The FWHM of the point spread function (PSF) of a mirror is 5.6μm (in tissue). Human in vivo retinal imaging is performed with the MHz laser showing more details in vascular structures. Here we could measure an axial resolution of 6.0Î1/4m by determining the FWHM of specular reflex in the image. Additionally, challenges related to such a high sweep bandwidth such as water absorption are investigated.

AB - We present a new design of a Fourier Domain Mode Locked laser (FDML laser), which provides a new record in sweep range at ∼1μm center wavelength: At the fundamental sweep rate of 2x417 kHz we reach 143nm bandwidth and 120nm with 4x buffering at 1.67MHz sweep rate. The latter configuration of our system is characterized: The FWHM of the point spread function (PSF) of a mirror is 5.6μm (in tissue). Human in vivo retinal imaging is performed with the MHz laser showing more details in vascular structures. Here we could measure an axial resolution of 6.0Î1/4m by determining the FWHM of specular reflex in the image. Additionally, challenges related to such a high sweep bandwidth such as water absorption are investigated.

U2 - 10.1117/12.2214758

DO - 10.1117/12.2214758

M3 - Conference contribution

VL - VOLUME 9697

BT - Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XX

T2 - SPIE BIOS

Y2 - 13 February 2016 through 18 February 2016

ER -

Megahertz FDML laser with up to 143nm sweep range for ultrahigh resolution OCT at 1050nm

Abstract

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