Y. Jiao, P.J. van Veldhoven, M.K. Smit and E.A.J.M. Bente
38th European Semiconductor Laser Workshop (ESLW 2012), 21-22 Sep 2012, Brussels, Belgium.
Publication year: 2012


The wavelength range from 1.6 to 1.8 μm is important to the application of optical coherent tomography (OCT) for its deeper penetration through the tissue due to a reduction of scattering [1]. In order to benefit of the fast sweeping speed and low cost potential of a swept-source OCT (SS-OCT), a tunable laser using semiconductor optical amplifiers (SOAs) as its gain material is desired. We have demonstrated a tunable laser using a 5-layer InAs/InP(100) quantum dot SOAs (QD-SOAs) in the 1.6 to 1.8 μm wavelength range [2]. The gain provided by the QD-SOA is low, which made the laser operate just above threshold. In this contribution, we present new single-layer InAs/InP(100) QD-SOAs, which provide more gain than the previous 5-layer QD amplifiers.

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