Title :
A Temporal Coherence Study of Quantum-Dot/Dash Broadband Lasers and Superluminescent Diodes
Author :
Dimas, Clara E. ; Tan, Chee-Loon ; Djie, Hery Susanto ; McAulay, Alastair D. ; Ooi, Boon-Siew
Author_Institution :
Electr. & Comput. Eng. Dept., Lehigh Univ., Bethlehem, PA
fDate :
6/1/2009 12:00:00 AM
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 mum and 33.48-74.56 mum 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.
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; indium compounds; semiconductor lasers; semiconductor quantum dots; superluminescent diodes; InAs-InGaAlAs; InGaAs-GaAs; interferometric systems; optical fiber-based spectral interferometer; quantum-dot/dash broadband lasers; superluminescent diodes; Quantum-dash (Qdash); quantum-dot (QD); semiconductor laser; superluminescent diode (SLD); temporal coherence;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2016575
