Abstract
The temporal coherence functions of InGaAs-GaAs quantum-dot (QD) and InAs-InGaAlAs quantum-dash (Qdash) superluminescent diodes (SLDs) and broadband laser diodes (BLDs) are reported. Using an optical fiber-based spectral interferometer, the fabricated devices were shown to yield low coherence lengths of 4.00-12.29 μm and 33.48-74.56 μm for SLD and BLD devices, respectively. In addition, there were negligible secondary coherencies indicating that these devices have the potential for use in low coherent interferometric systems.
Original language | English (US) |
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Pages (from-to) | 694-696 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 21 |
Issue number | 11 |
DOIs | |
State | Published - Jun 1 2009 |
Externally published | Yes |
Bibliographical note
Funding Information:Manuscript received November 21, 2008; revised February 13, 2009. First published March 16, 2009; current version published May 08, 2009. This work was supported in part by the National Science Foundation (NSF) under Grant 0725647, in part by the U.S. Army Research Laboratory, in part by the Commonwealth of Pennsylvania, and in part by the Department of Community and Economic Development.
Keywords
- Quantum-dash (Qdash)
- Quantum-dot (QD)
- Semiconductor laser
- Superluminescent diode (SLD)
- Temporal coherence
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering