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Akinetic swept source with adjustable coherence length for SS-OCT

Stancu, Radu F. and Jackson, David A. and Podoleanu, Adrian Gh. (2015) Akinetic swept source with adjustable coherence length for SS-OCT. In: Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXII. Proceedings of SPIE . SPIE, Bellingham, Washington. ISBN 978-1-62841-402-8. (doi:10.1117/12.2077640) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:49273)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL:
http://www.dx.doi.org/10.1117/12.2077640

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. © 2015 SPIE.

Item Type: Book section
DOI/Identification number: 10.1117/12.2077640
Additional information: This is available as OPEN ACCESS by clicking on the URL.
Uncontrolled keywords: Akinetic swept source, Coherence length, Dispersive medium, Mode-locking, Ring cavity, Bandwidth, Dispersion compensation, Laser mode locking, Light amplifiers, Linewidth, Locks (fasteners), Semiconductor lasers, Semiconductor optical amplifiers, Tomography, Tuning, Active mode locking, Coherence lengths, Dispersion-compensation fibers, Dispersive medium, Long coherence length, Relative length, Ring cavities, Swept source, Optical tomography
Subjects: Q Science > QC Physics > QC355 Optics
R Medicine > R Medicine (General) > R857.O6 Optical instruments
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Giles Tarver
Date Deposited: 10 Jul 2015 10:25 UTC
Last Modified: 05 Nov 2024 10:33 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49273 (The current URI for this page, for reference purposes)

University of Kent Author Information

Stancu, Radu F..

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CReDIT Contributor Roles:

Jackson, David A..

Creator's ORCID:
CReDIT Contributor Roles:

Podoleanu, Adrian Gh..

Creator's ORCID: https://orcid.org/0000-0002-4899-9656
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