
Proceedings Paper
Akinetic swept source with adjustable coherence length for SS-OCTFormat | Member Price | Non-Member Price |
---|---|---|
$17.00 | $21.00 |
Paper Abstract
An electronically controlled optical swept source (SS) at 1550 nm using mode locking in a dispersive ring cavity is
described. Active mode-locking was achieved by directly modulating the current of a semiconductor optical amplifier
(SOA) used as a gain medium. In the static regime, parameters such as linewidth, tuning bandwidth and contrast were
measured, while the axial range was determined dynamically. Two types of fiber, dispersion compensation and single
mode, are employed in the laser ring cavity. It is demonstrated that the relative lengths of the two types of fiber have
little effect on the linewidth, while more control on the linewidth is obtained via the frequency of the signal driving the
SOA. Linewidths less than 60 pm and over 1 nm were measured in the static regime while driving the SOA at 50 – 500
MHz. The narrowest linewidths were achieved where the proportion of dispersion compensation fiber in the cavity is 80-
90% of the total length. The optical source is developed to respond to the demands of OCT applications in general as
well as address the need for low cost tunable lasers for configurations where a large tuning bandwidths and long
coherence length might not be necessary.
Paper Details
Date Published: 2 March 2015
PDF: 5 pages
Proc. SPIE 9312, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XIX, 931238 (2 March 2015); doi: 10.1117/12.2077640
Published in SPIE Proceedings Vol. 9312:
Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XIX
James G. Fujimoto; Joseph A. Izatt; Valery V. Tuchin, Editor(s)
PDF: 5 pages
Proc. SPIE 9312, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XIX, 931238 (2 March 2015); doi: 10.1117/12.2077640
Show Author Affiliations
Adrian Gh. Podoleanu, Univ. of Kent (United Kingdom)
Published in SPIE Proceedings Vol. 9312:
Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XIX
James G. Fujimoto; Joseph A. Izatt; Valery V. Tuchin, Editor(s)
© SPIE. Terms of Use
