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Proceedings Paper

Coherence length characteristics from broadband semiconductor emitters: superluminescent diodes versus broadband laser diodes
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Paper Abstract

This paper reports on the measurement and analysis of the coherence function for broadband emitters such as superluminescent diodes (SLDs) and novel broadband laser diodes (BLDs) from self-assembled InGaAs/GaAs quantumdot (QD) and InAs/InP quantum-dash (Qdash) structures that emit at center wavelengths of 1150nm and 1650nm, respectively. Using the fiber-based spectral interferometry system, coherence lengths in fiber of 23 μm and 48 μm have been measured from the QD and Qdash BLDs. Larger spectral bandwidth of 137 nm and 78 nm have been measured from the QD and Qdash SLDs that yield coherence lengths in fiber of 3 μm and 10 μm, respectively. The coherence function of both BLDs and SLD reveals negligible secondary coherence subpeaks and sidelobes indicating the possibility of using these broadband sources to produce low artifacts optical coherence tomography (OCT) images.

Paper Details

Date Published: 3 February 2009
PDF: 8 pages
Proc. SPIE 7230, Novel In-Plane Semiconductor Lasers VIII, 72300B (3 February 2009); doi: 10.1117/12.809118
Show Author Affiliations
C. E. Dimas, Lehigh Univ. (United States)
C. L. Tan, Lehigh Univ. (United States)
H. S. Djie, JDS Uniphase Corp. (United States)
B. S. Ooi, Lehigh Univ. (United States)


Published in SPIE Proceedings Vol. 7230:
Novel In-Plane Semiconductor Lasers VIII
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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