Coherence improvement in dispersion‐tuned swept laser by pulse modulation

The dispersion‐tuned swept laser (DTSL) is a fast and wideband swept source applicable in swept‐source optical coherence tomography (SS‐OCT). However, it suffers from coherence degradation at high sweep rates. The coherence in the DTSL, which can be improved by pulse modulation in place of sinusoida...

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Bibliographic Details
Published inElectronics letters Vol. 50; no. 23; pp. 1729 - 1731
Main Authors Nagai, H., Yamashita, S.
Format Journal Article
LanguageEnglish
Published Stevenage The Institution of Engineering and Technology 06.11.2014
John Wiley & Sons, Inc
Subjects
Coherence
coherence improvement
coherence length
Degradation
dispersion‐tuned swept laser
frequency 50 kHz
laser beams
laser tuning
Lasers
light coherence
Modulation
Optical Coherence Tomography
optical modulation
optical tomography
Pulse modulation
sinusoidal modulation
swept‐source optical coherence tomography
time 100 ps
Wideband
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Summary:The dispersion‐tuned swept laser (DTSL) is a fast and wideband swept source applicable in swept‐source optical coherence tomography (SS‐OCT). However, it suffers from coherence degradation at high sweep rates. The coherence in the DTSL, which can be improved by pulse modulation in place of sinusoidal modulation, is demonstrated. A coherence length of 8 mm is obtained at a sweep rate of 50 kHz using 100 ps pulse modulation.
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content type line 23
ISSN:1350-911X
0013-5194
1350-911X
DOI:10.1049/el.2014.2849