Open AccessLinear-in-wavenumber actively-mode-locked wavelength-swept laser
Author(s) -
Hwidon Lee,
Gyeong Hun Kim,
Martin Villiger,
Hansol Jang,
Brett E. Bouma,
Chang-Seok Kim
Publication year - 2020
Publication title -
optics letters/optics index
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.397715
Subject(s) - optics , wavelength , interferometry , optical coherence tomography , wavenumber , laser , sweep frequency response analysis , mode locking , materials science , duty cycle , physics , acoustics , power (physics) , quantum mechanics
We report on an akinetic actively-mode-locked wavelength-swept laser (ASL) with a sweep that is highly linear in wavenumber. By tailoring the drive waveform of the intracavity modulator, the wavenumber sweep was further linearized to enable high fidelity frequency-domain interferometric ranging without resampling of the acquired data. Used for catheter-based optical coherence tomography, the ASL showed comparable imaging performance to a state-of-the-art polygon-based wavelength-swept source at a matching sweep rate of 103.6 kHz, a duty cycle of 95%, and a bandwidth of 100 nm, centered at 1330 nm.